Synthetic resins, containing an inert filler, that are widely used in dentistry.
The testing of materials and devices, especially those used for PROSTHESES AND IMPLANTS; SUTURES; TISSUE ADHESIVES; etc., for hardness, strength, durability, safety, efficacy, and biocompatibility.
Materials used in the production of dental bases, restorations, impressions, prostheses, etc.
The reaction product of bisphenol A and glycidyl methacrylate that undergoes polymerization when exposed to ultraviolet light or mixed with a catalyst. It is used as a bond implant material and as the resin component of dental sealants and composite restorative materials.
Acrylic acids or acrylates which are substituted in the C-2 position with a methyl group.
A restoration designed to remain in service for not less than 20 to 30 years, usually made of gold casting, cohesive gold, or amalgam. (Jablonski, Dictionary of Dentistry, 1992)
Polymers of high molecular weight which at some stage are capable of being molded and then harden to form useful components.
Creation of a smooth and glossy surface finish on a denture or amalgam.
Poly-2-methylpropenoic acids. Used in the manufacture of methacrylate resins and plastics in the form of pellets and granules, as absorbent for biological materials and as filters; also as biological membranes and as hydrogens. Synonyms: methylacrylate polymer; poly(methylacrylate); acrylic acid methyl ester polymer.
Flammable, amorphous, vegetable products of secretion or disintegration, usually formed in special cavities of plants. They are generally insoluble in water and soluble in alcohol, carbon tetrachloride, ether, or volatile oils. They are fusible and have a conchoidal fracture. They are the oxidation or polymerization products of the terpenes, and are mixtures of aromatic acids and esters. Most are soft and sticky, but harden after exposure to cold. (From Grant & Hackh's Chemical Dictionary, 5th ed & Dorland, 28th ed)
The mechanical property of material that determines its resistance to force. HARDNESS TESTS measure this property.
The description and measurement of the various factors that produce physical stress upon dental restorations, prostheses, or appliances, materials associated with them, or the natural oral structures.
An adhesion procedure for orthodontic attachments, such as plastic DENTAL CROWNS. This process usually includes the application of an adhesive material (DENTAL CEMENTS) and letting it harden in-place by light or chemical curing.
The hardening or polymerization of bonding agents (DENTAL CEMENTS) via exposure to light.
Light sources used to activate polymerization of light-cured DENTAL CEMENTS and DENTAL RESINS. Degree of cure and bond strength depends on exposure time, wavelength, and intensity of the curing light.
Characteristics or attributes of the outer boundaries of objects, including molecules.
A group of thermoplastic or thermosetting polymers containing polyisocyanate. They are used as ELASTOMERS, as coatings, as fibers and as foams.
Occlusal wear of the surfaces of restorations and surface wear of dentures.
Dental cements composed either of polymethyl methacrylate or dimethacrylate, produced by mixing an acrylic monomer liquid with acrylic polymers and mineral fillers. The cement is insoluble in water and is thus resistant to fluids in the mouth, but is also irritating to the dental pulp. It is used chiefly as a luting agent for fabricated and temporary restorations. (Jablonski's Dictionary of Dentistry, 1992, p159)
Nanometer-scale composite structures composed of organic molecules intimately incorporated with inorganic molecules. (Glossary of Biotechnology and Nanobiotechology Terms, 4th ed)
Compounds similar to hydrocarbons in which a tetravalent silicon atom replaces the carbon atom. They are very reactive, ignite in air, and form useful derivatives.
Substances used to bond COMPOSITE RESINS to DENTAL ENAMEL and DENTIN. These bonding or luting agents are used in restorative dentistry, ROOT CANAL THERAPY; PROSTHODONTICS; and ORTHODONTICS.
A prosthetic restoration that reproduces the entire surface anatomy of the visible natural crown of a tooth. It may be partial (covering three or more surfaces of a tooth) or complete (covering all surfaces). It is made of gold or other metal, porcelain, or resin.
Inability or inadequacy of a dental restoration or prosthesis to perform as expected.
Zirconium. A rather rare metallic element, atomic number 40, atomic weight 91.22, symbol Zr. (From Dorland, 28th ed)
The quality or state of being able to be bent or creased repeatedly. (From Webster, 3d ed)
An operation in which carious material is removed from teeth and biomechanically correct forms are established in the teeth to receive and retain restorations. A constant requirement is provision for prevention of failure of the restoration through recurrence of decay or inadequate resistance to applied stresses. (Boucher's Clinical Dental Terminology, 4th ed, p239-40)
Composite materials composed of an ion-leachable glass embedded in a polymeric matrix. They differ from GLASS IONOMER CEMENTS in that partially silanized glass particles are used to provide a direct bond to the resin matrix and the matrix is primarily formed by a light-activated, radical polymerization reaction.
Chemical reaction in which monomeric components are combined to form POLYMERS (e.g., POLYMETHYLMETHACRYLATE).
The hardening or polymerization of bonding agents (DENTAL CEMENTS) via chemical reactions, usually involving two components. This type of dental bonding uses a self-cure or dual-cure system.
The maximum stress a material subjected to a stretching load can withstand without tearing. (McGraw-Hill Dictionary of Scientific and Technical Terms, 5th ed, p2001)
A hard thin translucent layer of calcified substance which envelops and protects the dentin of the crown of the tooth. It is the hardest substance in the body and is almost entirely composed of calcium salts. Under the microscope, it is composed of thin rods (enamel prisms) held together by cementing substance, and surrounded by an enamel sheath. (From Jablonski, Dictionary of Dentistry, 1992, p286)
Cements that act through infiltration and polymerization within the dentinal matrix and are used for dental restoration. They can be adhesive resins themselves, adhesion-promoting monomers, or polymerization initiators that act in concert with other agents to form a dentin-bonding system.
The degree of approximation or fit of filling material or dental prosthetic to the tooth surface. A close marginal adaptation and seal at the interface is important for successful dental restorations.
Preparation of TOOTH surfaces and DENTAL MATERIALS with etching agents, usually phosphoric acid, to roughen the surface to increase adhesion or osteointegration.
The hard portion of the tooth surrounding the pulp, covered by enamel on the crown and cementum on the root, which is harder and denser than bone but softer than enamel, and is thus readily abraded when left unprotected. (From Jablonski, Dictionary of Dentistry, 1992)
A polymer obtained by reacting polyacrylic acid with a special anion-leachable glass (alumino-silicate). The resulting cement is more durable and tougher than others in that the materials comprising the polymer backbone do not leach out.
Use of a metal casting, usually with a post in the pulp or root canal, designed to support and retain an artificial crown.
Coloring, shading, or tinting of prosthetic components, devices, and materials.
A solution used for irrigating the mouth in xerostomia and as a substitute for saliva.
Hard, amorphous, brittle, inorganic, usually transparent, polymerous silicate of basic oxides, usually potassium or sodium. It is used in the form of hard sheets, vessels, tubing, fibers, ceramics, beads, etc.
The internal resistance of a material to moving some parts of it parallel to a fixed plane, in contrast to stretching (TENSILE STRENGTH) or compression (COMPRESSIVE STRENGTH). Ionic crystals are brittle because, when subjected to shear, ions of the same charge are brought next to each other, which causes repulsion.
Silicon polymers that contain alternate silicon and oxygen atoms in linear or cyclic molecular structures.
Inorganic derivatives of phosphoric acid (H3PO4). Note that organic derivatives of phosphoric acids are listed under ORGANOPHOSPHATES.
High molecular weight, insoluble polymers which contain functional groups that are capable of undergoing exchange reactions (ION EXCHANGE) with either cations or anions.
Restorations of metal, porcelain, or plastic made to fit a cavity preparation, then cemented into the tooth. Onlays are restorations which fit into cavity preparations and overlay the occlusal surface of a tooth or teeth. Onlays are retained by frictional or mechanical factors.
Polymeric resins containing a combination of SILOXANES and OXIRANES.
The visually perceived property of objects created by absorption or reflection of specific wavelengths of light.
The process of repairing broken or worn parts of a PERMANENT DENTAL RESTORATION.
Break or rupture of a tooth or tooth root.
Transparent, tasteless crystals found in nature as agate, amethyst, chalcedony, cristobalite, flint, sand, QUARTZ, and tridymite. The compound is insoluble in water or acids except hydrofluoric acid.
Preparation of TOOTH surfaces, and of materials bonded to teeth or DENTAL IMPLANTS, with agents and methods which roughen the surface to facilitate adhesion. Agents include phosphoric or other acids (ACID ETCHING, DENTAL) and methods include LASERS.
An inner coating, as of varnish or other protective substance, to cover the dental cavity wall. It is usually a resinous film-forming agent dissolved in a volatile solvent, or a suspension of calcium hydroxide in a solution of a synthetic resin. The lining seals the dentinal tubules and protects the pulp before a restoration is inserted. (Jablonski, Illustrated Dictionary of Dentistry, 1982)
Alloys that contain a high percentage of gold. They are used in restorative or prosthetic dentistry.
Microscopy in which the object is examined directly by an electron beam scanning the specimen point-by-point. The image is constructed by detecting the products of specimen interactions that are projected above the plane of the sample, such as backscattered electrons. Although SCANNING TRANSMISSION ELECTRON MICROSCOPY also scans the specimen point by point with the electron beam, the image is constructed by detecting the electrons, or their interaction products that are transmitted through the sample plane, so that is a form of TRANSMISSION ELECTRON MICROSCOPY.
The plan and delineation of dental prostheses in general or a specific dental prosthesis. It does not include DENTURE DESIGN. The framework usually consists of metal.
Polymeric resins derived from OXIRANES and characterized by strength and thermosetting properties. Epoxy resins are often used as dental materials.
A tooth from which the dental pulp has been removed or is necrotic. (Boucher, Clinical Dental Terminology, 4th ed)
An oxide of aluminum, occurring in nature as various minerals such as bauxite, corundum, etc. It is used as an adsorbent, desiccating agent, and catalyst, and in the manufacture of dental cements and refractories.
Inorganic compounds that contain carbon as an integral part of the molecule but are not derived from hydrocarbons.
A test to determine the relative hardness of a metal, mineral, or other material according to one of several scales, such as Brinell, Mohs, Rockwell, Vickers, or Shore. (From McGraw-Hill Dictionary of Scientific and Technical Terms, 6th ed)
Physical reactions involved in the formation of or changes in the structure of atoms and molecules and their interactions.
A type of porcelain used in dental restorations, either jacket crowns or inlays, artificial teeth, or metal-ceramic crowns. It is essentially a mixture of particles of feldspar and quartz, the feldspar melting first and providing a glass matrix for the quartz. Dental porcelain is produced by mixing ceramic powder (a mixture of quartz, kaolin, pigments, opacifiers, a suitable flux, and other substances) with distilled water. (From Jablonski's Dictionary of Dentistry, 1992)
A fabricated tooth substituting for a natural tooth in a prosthesis. It is usually made of porcelain or plastic.
Chemicals that are used to oxidize pigments in TEETH and thus effect whitening.
The seepage of fluids, debris, and micro-organisms between the walls of a prepared dental cavity and the restoration.
Products made by baking or firing nonmetallic minerals (clay and similar materials). In making dental restorations or parts of restorations the material is fused porcelain. (From McGraw-Hill Dictionary of Scientific and Technical Terms, 4th ed & Boucher's Clinical Dental Terminology, 4th ed)
The act of cleaning teeth with a brush to remove plaque and prevent tooth decay. (From Webster, 3d ed)
One of the eight permanent teeth, two on either side in each jaw, between the canines (CUSPID) and the molars (MOLAR), serving for grinding and crushing food. The upper have two cusps (bicuspid) but the lower have one to three. (Jablonski, Dictionary of Dentistry, 1992, p822)
The placing of a body or a part thereof into a liquid.
A purely physical condition which exists within any material because of strain or deformation by external forces or by non-uniform thermal expansion; expressed quantitatively in units of force per unit area.
A prosthesis or restoration placed for a limited period, from several days to several months, which is designed to seal the tooth and maintain its position until a permanent restoration (DENTAL RESTORATION, PERMANENT) will replace it. (From Jablonski, Dictionary of Dentistry, 1992)
Chemical compound used to initiate polymerization of dental resins by the use of DENTAL CURING LIGHTS. It absorbs UV light and undergoes decomposition into free radicals that initiate polymerization process of the resins in the mix. Each photoinitiator has optimum emission spectrum and intensity for proper curing of dental materials.
The use of a layer of tooth-colored material, usually porcelain or acrylic resin, applied to the surface of natural teeth, crowns, or pontics by fusion, cementation, or mechanical retention.
Any of the numerous types of clay which contain varying proportions of Al2O3 and SiO2. They are made synthetically by heating aluminum fluoride at 1000-2000 degrees C with silica and water vapor. (From Hawley's Condensed Chemical Dictionary, 11th ed)
A mixture of metallic elements or compounds with other metallic or metalloid elements in varying proportions for use in restorative or prosthetic dentistry.
Organic-inorganic hybrid polymers developed primarily for DENTAL RESTORATION. They typically contain a defined mixture of ORGANOSILICON COMPOUNDS; CERAMICS; and organic POLYMERS.
The pathologic wearing away of the tooth substance by brushing, bruxism, clenching, and other mechanical causes. It is differentiated from TOOTH ATTRITION in that this type of wearing away is the result of tooth-to-tooth contact, as in mastication, occurring only on the occlusal, incisal, and proximal surfaces. It differs also from TOOTH EROSION, the progressive loss of the hard substance of a tooth by chemical processes not involving bacterial action. (From Jablonski, Dictionary of Dentistry, 1992, p2)
Inorganic compounds that contain barium as an integral part of the molecule.
A statistical technique that isolates and assesses the contributions of categorical independent variables to variation in the mean of a continuous dependent variable.
Identification and measurement of ELEMENTS and their location based on the fact that X-RAYS emitted by an element excited by an electron beam have a wavelength characteristic of that element and an intensity related to its concentration. It is performed with an electron microscope fitted with an x-ray spectrometer, in scanning or transmission mode.
The use of a chemical oxidizing agent to whiten TEETH. In some procedures the oxidation process is activated by the use of heat or light.
An alloy used in restorative dentistry that contains mercury, silver, tin, copper, and possibly zinc.
Stainless steel. A steel containing Ni, Cr, or both. It does not tarnish on exposure and is used in corrosive environments. (Grant & Hack's Chemical Dictionary, 5th ed)
A family of nonmetallic, generally electronegative, elements that form group 17 (formerly group VIIa) of the periodic table.
Diamond. A crystalline form of carbon that occurs as hard, colorless or tinted isomeric crystals. It is used as a precious stone, for cutting glass, and as bearings for delicate mechanisms. (From Grant & Hackh's Chemical Dictionary, 5th ed)
A clear, odorless, tasteless liquid that is essential for most animal and plant life and is an excellent solvent for many substances. The chemical formula is hydrogen oxide (H2O). (McGraw-Hill Dictionary of Scientific and Technical Terms, 4th ed)
A property of the surface of an object that makes it stick to another surface.
Natural teeth or teeth roots used as anchorage for a fixed or removable denture or other prosthesis (such as an implant) serving the same purpose.
The process of reuniting or replacing broken or worn parts of a denture.
The generic term for salts derived from silica or the silicic acids. They contain silicon, oxygen, and one or more metals, and may contain hydrogen. (From McGraw-Hill Dictionary of Scientific and Technical Terms, 4th Ed)
A change of a substance from one form or state to another.
Substances that cause the adherence of two surfaces. They include glues (properly collagen-derived adhesives), mucilages, sticky pastes, gums, resins, or latex.
Small metal or ceramic attachments used to fasten an arch wire. These attachments are soldered or welded to an orthodontic band or cemented directly onto the teeth. Bowles brackets, edgewise brackets, multiphase brackets, ribbon arch brackets, twin-wire brackets, and universal brackets are all types of orthodontic brackets.
The most posterior teeth on either side of the jaw, totaling eight in the deciduous dentition (2 on each side, upper and lower), and usually 12 in the permanent dentition (three on each side, upper and lower). They are grinding teeth, having large crowns and broad chewing surfaces. (Jablonski, Dictionary of Dentistry, 1992, p821)
Procedures carried out with regard to the teeth or tooth structures preparatory to specified dental therapeutic and surgical measures.
Inorganic compounds that contain silicon as an integral part of the molecule.
Water-soluble low-molecular-weight polymers of acrylic or methacrylic acid that form solid, insoluble products when mixed with specially prepared ZnO powder. The resulting cement adheres to dental enamel and is also used as a luting agent.
The part of a tooth from the neck to the apex, embedded in the alveolar process and covered with cementum. A root may be single or divided into several branches, usually identified by their relative position, e.g., lingual root or buccal root. Single-rooted teeth include mandibular first and second premolars and the maxillary second premolar teeth. The maxillary first premolar has two roots in most cases. Maxillary molars have three roots. (Jablonski, Dictionary of Dentistry, 1992, p690)
Quartz (SiO2). A glassy or crystalline form of silicon dioxide. Many colored varieties are semiprecious stones. (From Grant & Hackh's Chemical Dictionary, 5th ed)
The selected form given to a natural tooth when it is reduced by instrumentation to receive a prosthesis (e.g., artificial crown or a retainer for a fixed or removable prosthesis). The selection of the form is guided by clinical circumstances and physical properties of the materials that make up the prosthesis. (Boucher's Clinical Dental Terminology, 4th ed, p239)
The methyl esters of methacrylic acid that polymerize easily and are used as tissue cements, dental materials, and absorbent for biological substances.
The maximum compression a material can withstand without failure. (From McGraw-Hill Dictionary of Scientific and Technical Terms, 5th ed, p427)
High-molecular-weight insoluble polymers that contain functional cationic groups capable of undergoing exchange reactions with anions.
Polymerized methyl methacrylate monomers which are used as sheets, moulding, extrusion powders, surface coating resins, emulsion polymers, fibers, inks, and films (From International Labor Organization, 1983). This material is also used in tooth implants, bone cements, and hard corneal contact lenses.
The quality or state of being wettable or the degree to which something can be wet. This is also the ability of any solid surface to be wetted when in contact with a liquid whose surface tension is reduced so that the liquid spreads over the surface of the solid.
Elements of limited time intervals, contributing to particular results or situations.
The force applied by the masticatory muscles in dental occlusion.
Hydrofluoric acid. A solution of hydrogen fluoride in water. It is a colorless fuming liquid which can cause painful burns.
A denture replacing one or more (but not all) natural teeth. It is supported and retained by underlying tissue and some or all of the remaining teeth.
Technique whereby the weight of a sample can be followed over a period of time while its temperature is being changed (usually increased at a constant rate).
Any technique by which an unknown color is evaluated in terms of standard colors. The technique may be visual, photoelectric, or indirect by means of spectrophotometry. It is used in chemistry and physics. (McGraw-Hill Dictionary of Scientific and Technical Terms, 4th ed)
Substances that inhibit or arrest DENTAL CARIES formation. (Boucher's Clinical Dental Terminology, 4th ed)
Compounds formed by the joining of smaller, usually repeating, units linked by covalent bonds. These compounds often form large macromolecules (e.g., BIOPOLYMERS; PLASTICS).
Numerical expression indicating the measure of stiffness in a material. It is defined by the ratio of stress in a unit area of substance to the resulting deformation (strain). This allows the behavior of a material under load (such as bone) to be calculated.
High molecular weight insoluble polymers which contain functional anionic groups that are capable of undergoing exchange reactions with cations.
Polymers of ETHYLENE OXIDE and water, and their ethers. They vary in consistency from liquid to solid depending on the molecular weight indicated by a number following the name. They are used as SURFACTANTS, dispersing agents, solvents, ointment and suppository bases, vehicles, and tablet excipients. Some specific groups are NONOXYNOLS, OCTOXYNOLS, and POLOXAMERS.
That portion of the electromagnetic spectrum in the visible, ultraviolet, and infrared range.
The constricted part of the tooth at the junction of the crown and root or roots. It is often referred to as the cementoenamel junction (CEJ), the line at which the cementum covering the root of a tooth and the enamel of the tooth meet. (Jablonski, Dictionary of Dentistry, 1992, p530, p433)
The nonexpendable items used by the dentist or dental staff in the performance of professional duties. (From Boucher's Clinical Dental Terminology, 4th ed, p106)
The part of a denture that overlies the soft tissue and supports the supplied teeth and is supported in turn by abutment teeth or the residual alveolar ridge. It is usually made of resins or metal or their combination.
Loss of the tooth substance by chemical or mechanical processes
Histamine H1 antagonist used in treatment of allergies, rhinitis, and urticaria.
A class of statistical methods applicable to a large set of probability distributions used to test for correlation, location, independence, etc. In most nonparametric statistical tests, the original scores or observations are replaced by another variable containing less information. An important class of nonparametric tests employs the ordinal properties of the data. Another class of tests uses information about whether an observation is above or below some fixed value such as the median, and a third class is based on the frequency of the occurrence of runs in the data. (From McGraw-Hill Dictionary of Scientific and Technical Terms, 4th ed, p1284; Corsini, Concise Encyclopedia of Psychology, 1987, p764-5)
Silver. An element with the atomic symbol Ag, atomic number 47, and atomic weight 107.87. It is a soft metal that is used medically in surgical instruments, dental prostheses, and alloys. Long-continued use of silver salts can lead to a form of poisoning known as ARGYRIA.
A technique using a pneumatic, high-pressure stream of aluminum oxide to remove DENTAL ENAMEL; DENTIN; and restorative materials from teeth. In contrast to using DENTAL HIGH-SPEED EQUIPMENT, this method usually requires no dental anesthesia (ANESTHESIA, DENTAL) and reduces risks of tooth chipping and microfracturing. It is used primarily for routine DENTAL CAVITY PREPARATION.
The process of keeping pharmaceutical products in an appropriate location.
Relating to the size of solids.
Materials that have a limited and usually variable electrical conductivity. They are particularly useful for the production of solid-state electronic devices.
Chemical reactions effected by light.
Magnesium oxide (MgO). An inorganic compound that occurs in nature as the mineral periclase. In aqueous media combines quickly with water to form magnesium hydroxide. It is used as an antacid and mild laxative and has many nonmedicinal uses.
Any of the eight frontal teeth (four maxillary and four mandibular) having a sharp incisal edge for cutting food and a single root, which occurs in man both as a deciduous and a permanent tooth. (Jablonski, Dictionary of Dentistry, 1992, p820)
Resistance and recovery from distortion of shape.
The methyl ester of methacrylic acid. It polymerizes easily to form POLYMETHYL METHACRYLATE. It is used as a bone cement.
The teeth of the first dentition, which are shed and replaced by the permanent teeth.
A phenethylamine that is an isomer of EPHEDRINE which has less central nervous system effects and usage is mainly for respiratory tract decongestion.
Agents, usually topical, that cause the contraction of tissues for the control of bleeding or secretions.
That phase of clinical dentistry concerned with the restoration of parts of existing teeth that are defective through disease, trauma, or abnormal development, to the state of normal function, health, and esthetics, including preventive, diagnostic, biological, mechanical, and therapeutic techniques, as well as material and instrument science and application. (Jablonski's Dictionary of Dentistry, 2d ed, p237)
The process of reuniting or replacing a broken or worn dental prosthesis or its part.
The fusion of ceramics (porcelain) to an alloy of two or more metals for use in restorative and prosthodontic dentistry. Examples of metal alloys employed include cobalt-chromium, gold-palladium, gold-platinum-palladium, and nickel-based alloys.
The property of objects that determines the direction of heat flow when they are placed in direct thermal contact. The temperature is the energy of microscopic motions (vibrational and translational) of the particles of atoms.
Skills, techniques, standards, and principles used to improve the art and symmetry of the teeth and face to improve the appearance as well as the function of the teeth, mouth, and face. (From Boucher's Clinical Dental Terminology, 4th ed, p108)
The spectrometric analysis of fluorescent X-RAYS, i.e. X-rays emitted after bombarding matter with high energy particles such as PROTONS; ELECTRONS; or higher energy X-rays. Identification of ELEMENTS by this technique is based on the specific type of X-rays that are emitted which are characteristic of the specific elements in the material being analyzed. The characteristic X-rays are distinguished and/or quantified by either wavelength dispersive or energy dispersive methods.
A mild astringent and topical protectant with some antiseptic action. It is also used in bandages, pastes, ointments, dental cements, and as a sunblock.
Tools used in dentistry that operate at high rotation speeds.
The physical or physiological processes by which substances, tissue, cells, etc. take up or take in other substances or energy.
A tooth's loss of minerals, such as calcium in hydroxyapatite from the tooth matrix, caused by acidic exposure. An example of the occurrence of demineralization is in the formation of dental caries.
A dark-gray, metallic element of widespread distribution but occurring in small amounts; atomic number, 22; atomic weight, 47.90; symbol, Ti; specific gravity, 4.5; used for fixation of fractures. (Dorland, 28th ed)
Inorganic salts of hydrofluoric acid, HF, in which the fluorine atom is in the -1 oxidation state. (McGraw-Hill Dictionary of Scientific and Technical Terms, 4th ed) Sodium and stannous salts are commonly used in dentifrices.
LIGHT, it's processes and properties, and the characteristics of materials interacting with it.
Localized destruction of the tooth surface initiated by decalcification of the enamel followed by enzymatic lysis of organic structures and leading to cavity formation. If left unchecked, the cavity may penetrate the enamel and dentin and reach the pulp.
The third tooth to the left and to the right of the midline of either jaw, situated between the second INCISOR and the premolar teeth (BICUSPID). (Jablonski, Dictionary of Dentistry, 1992, p817)
Application of a protective agent to an exposed pulp (direct capping) or the remaining thin layer of dentin over a nearly exposed pulp (indirect capping) in order to allow the pulp to recover and maintain its normal vitality and function.
Chemicals and substances that impart color including soluble dyes and insoluble pigments. They are used in INKS; PAINTS; and as INDICATORS AND REAGENTS.
Solutions for rinsing the mouth, possessing cleansing, germicidal, or palliative properties. (From Boucher's Clinical Dental Terminology, 4th ed)
Inorganic compounds that contain potassium as an integral part of the molecule.
The study of the energy of electrons ejected from matter by the photoelectric effect, i.e., as a direct result of absorption of energy from electromagnetic radiation. As the energies of the electrons are characteristic of a specific element, the measurement of the energy of these electrons is a technique used to determine the chemical composition of surfaces.
Erbium. An element of the rare earth family of metals. It has the atomic symbol Er, atomic number 68, and atomic weight 167.26.
Natural or synthetic dyes used as coloring agents in processed foods.
The upper part of the tooth, which joins the lower part of the tooth (TOOTH ROOT) at the cervix (TOOTH CERVIX) at a line called the cementoenamel junction. The entire surface of the crown is covered with enamel which is thicker at the extremity and becomes progressively thinner toward the cervix. (From Jablonski, Dictionary of Dentistry, 1992, p216)
The joining of objects by means of a cement (e.g., in fracture fixation, such as in hip arthroplasty for joining of the acetabular component to the femoral component). In dentistry, it is used for the process of attaching parts of a tooth or restorative material to a natural tooth or for the attaching of orthodontic bands to teeth by means of an adhesive.
A computer based method of simulating or analyzing the behavior of structures or components.
A spectroscopic technique in which a range of wavelengths is presented simultaneously with an interferometer and the spectrum is mathematically derived from the pattern thus obtained.
A beverage made from ground COFFEA beans (SEEDS) infused in hot water. It generally contains CAFFEINE and THEOPHYLLINE unless it is decaffeinated.
A species of gram-positive, coccoid bacteria that is numerous in the mouth and throat. It is a common cause of endocarditis and is also implicated in dental plaque formation.
Inorganic compounds that contain calcium as an integral part of the molecule.
A high-molecular-weight polymeric elastomer derived from the milk juice (LATEX) of HEVEA brasiliensis and other trees and plants. It is a substance that can be stretched at room temperature to at least twice its original length and after releasing the stress, retract rapidly, and recover its original dimensions fully.
The resistance that a gaseous or liquid system offers to flow when it is subjected to shear stress. (From McGraw-Hill Dictionary of Scientific and Technical Terms, 6th ed)
A chemical element having an atomic weight of 106.4, atomic number of 46, and the symbol Pd. It is a white, ductile metal resembling platinum, and following it in abundance and importance of applications. It is used in dentistry in the form of gold, silver, and copper alloys.
A species of gram-positive, coccoid bacteria isolated from the human tooth surface. Strains have been shown to be cariogenic in experimental animals and may be associated with human dental caries.
Inorganic compounds that contain aluminum as an integral part of the molecule.
A process involving chance used in therapeutic trials or other research endeavor for allocating experimental subjects, human or animal, between treatment and control groups, or among treatment groups. It may also apply to experiments on inanimate objects.
Preparatory activities in ROOT CANAL THERAPY by partial or complete extirpation of diseased pulp, cleaning and sterilization of the empty canal, enlarging and shaping the canal to receive the sealing material. The cavity may be prepared by mechanical, sonic, chemical, or other means. (From Dorland, 28th ed, p1700)
A group of compounds that contain a bivalent O-O group, i.e., the oxygen atoms are univalent. They can either be inorganic or organic in nature. Such compounds release atomic (nascent) oxygen readily. Thus they are strong oxidizing agents and fire hazards when in contact with combustible materials, especially under high-temperature conditions. The chief industrial uses of peroxides are as oxidizing agents, bleaching agents, and initiators of polymerization. (From Hawley's Condensed Chemical Dictionary, 11th ed)
A richly vascularized and innervated connective tissue of mesodermal origin, contained in the central cavity of a tooth and delimited by the dentin, and having formative, nutritive, sensory, and protective functions. (Jablonski, Dictionary of Dentistry, 1992)
The application of dental knowledge to questions of law.
An occlusion resulting in overstrain and injury to teeth, periodontal tissue, or other oral structures.
Inorganic or organic compounds that contain boron as an integral part of the molecule.
The plan, delineation, and location of actual structural elements of dentures. The design can relate to retainers, stress-breakers, occlusal rests, flanges, framework, lingual or palatal bars, reciprocal arms, etc.
The force per unit area that the air exerts on any surface in contact with it. Primarily used for articles pertaining to air pressure within a closed environment.
Surface resistance to the relative motion of one body against the rubbing, sliding, rolling, or flowing of another with which it is in contact.
Domesticated bovine animals of the genus Bos, usually kept on a farm or ranch and used for the production of meat or dairy products or for heavy labor.
Presence of warmth or heat or a temperature notably higher than an accustomed norm.
Condition of having pores or open spaces. This often refers to bones, bone implants, or bone cements, but can refer to the porous state of any solid substance.
A trace element that constitutes about 27.6% of the earth's crust in the form of SILICON DIOXIDE. It does not occur free in nature. Silicon has the atomic symbol Si, atomic number 14, and atomic weight [28.084; 28.086].
Calcium salts of phosphoric acid. These compounds are frequently used as calcium supplements.
Agents used to occlude dental enamel pits and fissures in the prevention of dental caries.
One of the protein CROSS-LINKING REAGENTS that is used as a disinfectant for sterilization of heat-sensitive equipment and as a laboratory reagent, especially as a fixative.
Methylester of cellulose. Methylcellulose is used as an emulsifying and suspending agent in cosmetics, pharmaceutics and the chemical industry. It is used therapeutically as a bulk laxative.
A class of compounds composed of repeating 5-carbon units of HEMITERPENES.
Nanometer-sized particles that are nanoscale in three dimensions. They include nanocrystaline materials; NANOCAPSULES; METAL NANOPARTICLES; DENDRIMERS, and QUANTUM DOTS. The uses of nanoparticles include DRUG DELIVERY SYSTEMS and cancer targeting and imaging.
A peroxide derivative that has been used topically for BURNS and as a dermatologic agent in the treatment of ACNE and POISON IVY DERMATITIS. It is used also as a bleach in the food industry.
Substances made up of an aggregation of small particles, as that obtained by grinding or trituration of a solid drug. In pharmacy it is a form in which substances are administered. (From Dorland, 28th ed)
Synthetic or natural materials, other than DRUGS, that are used to replace or repair any body TISSUES or bodily function.

The crystal growth technique--a laboratory evaluation of bond strengths. (1/1129)

An ex vivo study was carried out to determine differences in the bond strengths achieved with brackets placed using a crystal growth technique compared with a conventional acid-etch technique. A solution of 37 per cent phosphoric acid was used for acid-etching and a commercially available polyacrylic acid gel, Crystal-lok for crystal growth. A heavily-filled composite resin was used for all samples to bond brackets to healthy premolar teeth extracted for orthodontic purposes. Polycrystalline ceramic and stainless steel brackets were used and tested to both tensile and shear failure using an Instron Universal Testing machine. The tensile and shear bond strengths were recorded in kgF. In view of difficulties experienced with previous authors using different units to describe their findings, the data were subsequently converted to a range of units in order to facilitate direct comparison. The crystal growth technique produced significantly lower bond strengths than the acid-etch technique for ceramic and stainless steel brackets, both in tensile and shear mode. The tensile bond strength for stainless steel brackets with crystal growth was 2.2 kg compared with 6.01 kg for acid-etch, whilst with ceramic brackets the tensile bond strengths were 3.9 kg for crystal growth and 5.55 kg for acid-etch. The mean shear bond strength for stainless steel brackets with crystal growth was 12.61 kg compared with 21.55 kg for acid-etch, whilst with ceramic brackets the shear bond strengths were 7.93 kg with crystal growth compared with 16.55 kg for acid-tech. These bond strengths were below those previously suggested as clinically acceptable.  (+info)

Marginal adaptation of commercial compomers in dentin cavity. (2/1129)

The dentin cavity adaptation and setting characteristics of four commercial compomers were evaluated by measuring the wall-to-wall contraction gap width in the cylindrical dentin cavity and measuring the compressive strength for a maximum of 14 days after setting. The dentin cavity wall was pretreated by the dentin adhesives according to each manufacturer's instructions or the experimental contraction gap-free dentin bonding system. Complete marginal integrity was obtained in only one compomer and two resin composites which were combined with the experimental dentin bonding system. The compressive strength of two resin composites and two compomers ten minutes after setting was comparable to that after 14 days which indicated that the compomers exhibited setting characteristics as rapidly as the resin composite. It was concluded that a high efficacy dentin bonding system is required for commercial compomers to prevent gap formation during irradiation caused by the rapid setting shrinkage.  (+info)

A laboratory investigation to compare enamel preparation by sandblasting or acid etching prior to bracket bonding. (3/1129)

A laboratory investigation to compare the mean shear debonding force and mode of bond failure of metallic brackets bonded to sandblasted and acid-etched enamel is described. The buccal surfaces of 30 extracted human premolars were sandblasted for 5 seconds with 50 mu alumina and the buccal surfaces of a further 30 human premolars were etched with 37 per cent phosphoric acid for 15 seconds. Following storage for 24 hours at 37 degrees C in distilled water, shear debonding force was measured using an Instron Universal Testing Machine with a cross-head speed of 10 mm/minute. Mean shear debonding force was significantly lower for brackets bonded to sandblasted enamel compared to acid etched enamel (P < 0.001). Weibull analysis showed that at a given stress the probability of failure was significantly greater for brackets bonded to sandblasted enamel. Brackets bonded to etched enamel showed a mixed mode of bond failure whereas following sandblasting, failure was adhesive at the enamel/composite interface (P < 0.01).  (+info)

Photopolymerization of composite resin using the argon laser. (4/1129)

Because of the dental profession's increased utilization of light-cured restorative materials, there has been a corresponding increase in research into the light sources used to initiate polymerization. The argon laser is one promising source, as the wavelength of light emitted by this laser is optimal for the initiation of polymerization of composite resins. The literature reflects a strong divergence of opinion about many aspects of the effectiveness of laser curing compared to conventional light curing. Research indicates that the argon laser offers a greater depth and degree of polymerization, less time required and an enhancement of the physical properties of composite resins polymerized. These advantages are offset by reports that the increased polymerization caused by the laser results in increased shrinkage, brittleness and marginal leakage. Dentists interested in the new technology need to monitor ongoing studies.  (+info)

Ultraconservative resin restorations. (5/1129)

Ultraconservative dentistry represents a great step forward for the dentist, the profession, and especially the patient. It involves the early detection and complete elimination of all accessible and non-accessible carious material from the tooth. Untreated caries can be extremely and rapidly destructive. The earliest interception of decay maintains total dental health and increases the likelihood of the restored teeth lasting a lifetime.  (+info)

The oral effects of smokeless tobacco. (6/1129)

Smokeless tobacco use has increased rapidly in North America. This form of tobacco use has many oral effects including leukoplakia, oral cancer, loss of periodontal support (recession), and staining of teeth and composite restorations. Systemic effects such as nicotine dependence, transient hypertension and cardiovascular disease may also result from smokeless tobacco use. This paper aims to guide dental practitioners in identifying oral lesions that occur due to the use of smokeless tobacco and also offer guidelines on how to counsel patients who express a desire to stop using smokeless tobacco products.  (+info)

Effects of composite thickness on the shear bond strength to dentin. (7/1129)

The manufacturers of some condensable posterior composites claim that their products can be placed in bulk and light-cured in 5-mm-thick increments. This study compared the shear bond strengths of three composite resins when bonded to dentin in 2- and 5-mm-thick increments. Overall the bond strengths were adversely affected by the composite thickness (p < 0.0001). The shear bond strength of each composite tested was much lower when polymerized in a 5-mm increment than in a 2-mm increment of composite (p < or = 0.0005). The two condensable composites tested had a lower bond strength than the conventional composite when polymerized in a 5-mm bulk increment (p < or = 0.01).  (+info)

In situ self hardening bioactive composite for bone and dental surgery. (8/1129)

A new biomaterial is presented which consists of a cellulose derivative--silanised hydroxyethylcellulose (HEC-SIL) and biphasic calcium phosphate (BCP). Rheological properties of the polymer itself and its mixture with BCP are pH-dependent. At pH 10-12 HEC-SIL is liquid and undergoes quick gellation at pH < 9. Similarly, the paste of HEC-SIL and BCP is fluid and injectable at higher pH and solidifies in biological solutions. The rate of this solidification can be easily controlled by the degree of substitution of hydroxyethylcellulose with silicoalkoxy groups.  (+info)

OBJECTIVES: To compare the marginal ridge fracture strength of Class II composite resin restorations placed with a straight or contoured matrix band using composite resins with different modulus of elasticity. METHODS: In 60 artificial first molars standardized MO-preparations were ground. Two matrix systems were used: (1) A straight matrix (Standard Tofflemire Matrix, KerrHawe) in Tofflemire retainer (Produits Dentaire). (2) A contoured matrix (Standard matrix, Palodent, Dentsply). In both groups, a wooden wedge and separation ring (Composi-Tight Gold, GDS) were placed and the matrix was burnished against the adjacent tooth. Three composite resins together were used (Filtek Supreme: e-modulus 13.3 GPa (3M ESPE), Clearfil AP-X: 16.6 GPa (Kuraray) and Clearfil Majesty Posterior: 22.0 GPa (Kuraray)), resulting in six groups (n=10). Teeth were mounted into a MTS servo hydraulic testing machine (Mini Bionix II, MTS, USA) with stylus placed on the marginal ridge. Samples were loaded at a crosshead ...
INTRODUCTION. Light-cured composite resins are being more used specially because they are aesthetically advantageous and enable to be polymerized by physical and chemical activators8,30. However, the crucial point to be reached during restorative dentistry procedures with composite resins is to obtain satisfactory restorations with an adequate light activation technique24.. Composites consist mainly of filler particles and a resin matrix based on different monomers6. Currently, the most widely marketed composite resins are based on the polymerization of bisphenol A glycol dimethacrylate (Bis-GMA) and urethane dimethacrylate (UDMA)25. The curing process occurs in the organic matrix where there is a monomer-polymer conversion through an activation mechanism8. However, an insufficient degree of conversion directly affects the physical properties and chemical stability of material8. Polymers used in the composition of composite resins may absorb water and chemicals from the oral environment ...
prepared on newly extracted teeth, and divided into the following groups: - First group: 10 samples of the total etch bonding agent [excite] with [Tetric ceram] composite resin were used. - Second group: 10 samples of the one step self etch bonding agent [one up bond f] with [estelite] composite resin were used. - Third group: 10 samples of the two step self etch bonding agent [Tyrian spe-one step] with [renew] composite resin were used. - Fourth group: 10 samples of the one step self etch bonding agent [Adper prompt L pop] with [z250] composite resin were used. All the laboratory samples were immersed in physiological serum for a week and exposed to 150 thermal cycles, All the samples then were stained with methylene blue, sectioned and studied with computer connected to the scanner. There was significant difference in the leakage levels between the gingival and the occlusal area. The leakage in the gingival wall was greater than in the occlusal wall. - The total etch adhesive [Excite] was ...
To evaluate the effect of nonvital bleaching on the shear bond strength of composite resin using three adhesive systems. Two hundred seventy bovine teeth were assigned to 3 groups (n = 90): SP, paste of sodium perborate and water; CP, 37% carbamide peroxide; CO, control group (no treatment). After the bleaching treatment, the teeth in each group were cut into enamel (E) and dentin (D) sections. The teeth were embedded in polyester resin and polished in order to obtain a flat E or D surface. Each group was divided into 6 subgroups (n = 15) according to substrate (E and D) and adhesive system: SB, Single Bond (solvent: water/alcohol); PB, Prime & Bond NT (solvent: acetone); CLF, Clearfil SE Bond (solvent: water). The adhesive system was applied on each flat surface according to the manufacturer s instructions and a cylinder of composite resin Z-250 was overlaid. The specimens were stored in distilled water for 7 days at 37 C. The SBS test was performed in a universal testing machine with crosshead ...
The A1U10 group showed significantly lower mean hardness than the other two groups (A1U20 and A1U40) for the U surface of this composite resin shade (A1) (£0.05). At the L surface of A1 shade a significantly higher mean hardness was found at 40 s irradiation time (A1L40) than for the A1L10 and A1L20 groups, which means that values were also statistically different (p£0.05). Both surfaces (U and L) of A3 shade composite revealed significantly greater mean hardness values at 40 s curing time, followed by the 20-s and the 10-s curing time groups (p£0.05). Statistically significant differences were found between U and L surfaces of each composite shade-IT combination (p=0.0001) and among the irradiation times of same shade-surface combination (p=0.0001), except between A1U20 and A1U40 groups. DISCUSSION. The polymerization of light-cured composite resins starts and is sustained when the rate of delivery photons from the source of light is sufficient to maintain the photo-absorbing compound, ...
This manuscript describes dental compositions contain in-organic fillers, multifunctional methacrylates and photoinitiators. The main problem by application and UV curing process is the shrinkage of photoreactive dental materials during and after UV curing process. Total shrinkage of UV curable dental composites is a phenomenon of polymerization shrinkage, typical behavior for multifunctional methacrylates during polymerization process. The important factors by curing of dental composites are: kind and concentration of used methacrylates, their functionality, double bond concentration, kind and concentration of added photoinitiator and UV dose. They are investigated UV-curable dental compositions based on 2,2-bis-[4-(2-hydroxy-3-methacryxloyloxypropyl)phenyl]propane (Bis-GMA) and containing such multifunctional monomers as 1,3-butanediol dimethacrylate (1,3-BDDMA), diethylene glycol dimethacrylate (DEGDMA), tetraethylene glycol dimethacrylate (T3EGDMA), trimethylolpropane trimethacrylate ...
BackgroundLight curing of resin composite is associated with a thermal rise that may have harmful effect on the health of the vital pulp. In addition, desirable polymerization is important to achieve mechanical properties and clinical function. The purpose of this in‑vitro study was to compare the thermal rise under normal dentin during photopolymerization and degree of conversion (DC) of bulk fill and conventional resin composite using continuous high‑ and soft‑start mode.Materials and MethodsIn this in‑vitro study, Cl I cavities with a dimension of 4 mm × 4 mm × 4 mm and remaining dentin thickness of 1 mm were prepared on 56 extracted human molars. The temperature rise during the light curing of conventional resin composite (Tetric N Ceram, Ivoclar Vivadent) by incremental filling technique and bulk‑fill resin composite (Tetric N Ceram Bulk Fill, Ivoclar Vivadent) by bulk‑filling technique were measured with a K‑type thermocouple wire. DC of both resin composites was measured
Solitaire composite resin: a condensable composite resin that can be placed 67% faster than conventional hybrid composite resins & produces superior interproximal contacts
composite board uses composite photo board article composite photo boards are made from an alloy or polymer blend of the metal elements of the composite.. This composite material has the capacity to bend and flex, and is often referred to as a stiff composite.. The materials themselves are relatively light, weighing less than 0.1 lb.. The composite boards composite composite metal component is usually comprised of aluminum and plastic composite elements.. The metal components are combined with a resin or plastic resin mixture to form a composite material.. The resin/polymer resin mixture is often combined with other composite materials to make composite composite components.. Composite board uses aluminum composite board composite composite photo panel composite photo photo board composite photo article composite boards typically use the same metal composite components as composite photo.. Composite photo boards have a similar metal component composition as composite board.. The aluminum ...
The exposure of dentin to the oral environment leads to dentinal sensitivity, the treatment of which exposes the substrate to various substances that can alter its interaction with adhesive restorative materials. The objective of this study was to analyze whether the prior use of desensitizing agents interferes with the bond strength of resin restorative materials. A total of 48 molars were divided into six groups, according to conventional application (CV) of the adhesive systems Scotchbond Multipurpose (SB) and Clearfil SE Bond (CF) and their association with bioglass (BG/Biosilicate®) or arginine (AR/Sensitive Pro-Relief/TM). Bond strength was assessed by a microshear mechanical test, using a composite resin as restorative material (Filtek Z350 XT). Mechanical testing was performed at a speed of 0.5 mm/min in a universal testing machine, and the data were submitted to two-way ANOVA and Tukeys test (α = 0.05). The bond strength (MPa) was 17.03 for SBCV; 21.19 for SBAR; 26.24 for SBBG; 21.37 for
Dental adhesive system formulations fundamentally contain resin monomers, polymerization initiators, inhibitors or stabilizers, solvents and sometimes inorganic fillers . According to their chemical structures, these components may exhibit hydrophobic or hydrophilic behavior . The hydrophilic components, such as 2-hydroxyethylmethacrylate (HEMA), are required to increase monomer infiltration into wet and demineralized dentin . However, the hydrophobic components used in these materials, such as bisphenol A glycidyldimethacrylate (Bis-GMA), are known to be responsible for enhancing the mechanical properties of the formulation and its compatibility with restorative composites or resin cements . Resin monomer infiltration into the spaces around exposed collagen fibrils depends on the results of dentin demineralization before hybrid layer formation . This interface must exhibit bond strength values that are sufficiently high to counteract the stresses generated by polymerization shrinkage and ...
Find Laminating Adhesives and Composite Resins on GlobalSpec by specifications. Laminating adhesives and composite resins are cured using heat and/or heat and pressure.
Bonding & Composite Resins ExplainedBonding of composite resins is ideal for small corrections, in which most of the tooth is healthy and stable. It can be used…
Objective: Control of microleakage represents a challenge for posterior composite restorations. The technique for composite placement may reduce microleakage. The null hypothesis of this in vitro study was that centripetal incremental insertion of composite resin would result in less microleakage than that obtained with the oblique incremental technique or bulk technique. Method and Materials: Standardized Class 2 preparations were made in 60 caries-free extracted third molars and randomly assigned to 3 groups (n = 20): (1) oblique incremental insertion technique (control), (2) centripetal incremental insertion technique, and (3) bulk insertion. The teeth were restored with a total-etch adhesive and microhybrid composite resin. The specimens were isolated with nail varnish except for a 2-mm-wide area around the restoration and then thermocycled (1,000 thermal cycles, 5 C/55 C; 30-second dwell time). The specimens were immersed in an aqueous solution of 50% silver nitrate for 24 hours, followed ...
Disclosed is a self-adhesive nonwoven elastic composite material composed of at least one elastic composite material; and a coating of a self-adhesive material on at least a portion of at least one exterior surface of the elastic composite material so that the material is capable of being compressed in the Z-direction at least about 45 percent at a pressure of about 3 psi to a thickness of not less than about 0.035 inch. The elastic composite material may contain an elastomeric nonwoven fibrous web joined to at least one relatively nonelastic gatherable material at spaced-apart locations so that the gatherable material is gathered between the spaced-apart locations. Such an elastic composite material can be coated with a self-adhesive material on at least a portion of at least one exterior surface of the elastic composite material so that the peel strength of the self-adhesive material is less than the peel strength of the layers of the elastic composite material. Also disclosed is a self-adhesive
Renamel Flowable Microhybrid 11 shade flowable composites kit from Cosmdent is the perfect choice when you are working with dental composite repairs, sealing margins, repairing pits and defects and small occlusal repairs of all types. Renamel Flowable Composites are perfectly matched to the VITA shade guide and the rest of Renamel dental composites for easy single shade restorations.
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1×3.8g Syringe. ESTELITE SIGMA QUICK® is a universal, supra-nano filled restorative material utilizing 100% spherical filler technology. With a filler weight of 82% (71% volume), the spherical fillers provide a uniform diffusion of light, allowing for a more forgiving shade match, and superb blend to surrounding teeth. In addition, the spherical fillers provide low composite wear over time and are safe for opposing dentition while causing less wear on opposing teeth.. Estelite Sigma Quick® has a low 1.3% volumetric shrinkage and low shrinkage stress for decreased post-op sensitivity and resistance against marginal leakage, allowing for lasting patient comfort.. Estelite Sigma Quick® offers a 90 second working time under ambient light, and features a proprietary initiator system that allows it to polymerize quickly, with very minimal shade shift over time.. Tokuyamas spherical fillers provide exceptional polishability, and long-term polish retention. Additionally, Estelite Sigma Quick® is ...
This is where fillings with colored teeth or composite resins come into play. Composite resin covers our tooth enamel, giving it a natural look and feel. This composite resin also helps reshape the DE-shaped teeth. Tell me more about them and see why you need them.. The biggest advantage of composite resins is that they are very durable. In addition, they offer good resistance to cracks in small and medium-sized dental fillings. It is important that this filling is resistant to food pressure. Therefore, the composite resin helps provide stability and support to this seal. Another benefit of colored dental fillings is that they can be used on both sides of the tooth. For patients who want a natural appearance even though some work is being done on their teeth, composite fillings are the best option. Also, they insulate your teeth so that excessive temperature changes dont affect them. Now that we know the advantages of colored patches, lets examine the disadvantages. After surgery, the patient ...
Composite Resin (White Fillings) is a dental restorative material made of acrylic resin mixed with fine glasslike particles and match the color of your existing teeth.
Lelia Gheorghita, Mihaela tuculina, Oana Diaconu, Victoria Andrei, Iren Moraru, Marilena Bataiosu Odontotherapy-Endodontics Departament, Faculty of Dental Medicine, University of Medicine and Farmacy of Craiova Abstract The purpose of this paper is to prove that corect access cavity is an important step in endodontic treatment and all the other steps depend on this preliminary phase.Material and method. In our study we used a number of 50 monoradicular and pluriradicular teeth, with different grades of radicular curvature
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In this video article dedicated to the finishing and polishing of composite resin restorations, we will address the direct & indirect restorations in ...
The present work addressed the determination and visualization of the direction and extent of polymerization shrinkage in the light-initiated composite. Hypotheses about the light-cured composite contraction patterns are controversial. With high resolution µCT images, the displacement vector fields are examined and calculated two-dimensionally via an elastic registration algorithm using vector-spline regularization and three-dimensionally with a local rigid registration (block matching) following images segmentation (corresponding traceable fillers in composite). It appears that the light-initiated resin composites do not always shrink toward the light source. Two major contraction patterns were observed: either shrink toward the top-surface (free surface), or toward one side of the cavity wall, in which the bonding was stronger or remained intact. With the proposed methods, it is possible to describe the contraction patterns in great detail. We could demonstrate that the bonding quality to the ...
The present invention relates to a method of manufacturing artificial tooth restorations for natural teeth or implants comprising a ceramic densely sintered high strength individual core (B) with dental porcelain (A) by powder metallurgical manufacturing methods. The inner surface (I) of the core (B), which will fit against one or more prepared tooth surfaces (P) or artificial abutments is manufactured by forming a ceramic powder mixture against a surface of a body at which said surface is manufactured by registering the surfaces of the prepared teeth or artificial abutments and their mutual relationship with a three dimensional optical or mechanical reading method directly in the mouth or on a model in e.g. plaster after which the registered surfaces are reproduced in an enlarged size e.g. with a computer controlled milling machine at which the enlargement is calculated from the shrinkage of the ceramic material during sintering to full density and considering the gap for cement.
Caries is the most common oral disease in the United States today, but when preventative measures fail, restorative procedures need to be reliable and long-lasting. Unfortunately, with current techniques, esthetic resin composite restorations have an average lifetime of just six years. At the Division of Biomaterials and Biomechanics, we conduct research to develop new materials to overcome the shortcomings of commercially available products. The main goal of our current project is to reduce the incidence of secondary decay in teeth and improve the longevity of esthetic restorations. The intern in this position will learn techniques involved in biomaterials science as we synthesize and experiment with different formulations of dental adhesives and restorative composites. Specifically, interns will: 1) use organic chemistry methods in the laboratory; 2) master the techniques of monomer and polymer characterization; 3) Use UV-visible spectrophotometry to measure the release rates of various ...
Renamel Flowable Microhybrid Starter kit from Cosmdent is the perfect choice when you are working with dental composite repairs, sealing margins, repairing pits and defects and small occlusal repairs of all types. Renamel Flowable Composites are perfectly matched to the VITA shade guide and the rest of Renamel dental composites for easy single shade restorations.
Introduction: Orthodontic treatment may cause an increased accumulation of cariogenic bacteria. An orthodontic resin with antibacterial properties may inhibit bacterial growth around the brackets. The aims of this in-vitro study were to compare the antibacterial and mechanical properties of the newly introduced orthodontic resin containing selenium with a standard resin and a resin modified glass ionomer (RMGI). Methods: Three orthodontic materials were tested (SeLECTDefense; TransbondXT, Fuji Ortho-LC). The antibacterial properties of these materials were evaluated by studying the bacterial growth in liquid media (BG) and agar diffusion (AD) tests. In the BG testing, 100 adhesive discs (3mmx2mm) were created of each material. Five discs were then placed into each vial containing 0.5ml of brain-heart-infusion broth and 2.5µl of streptococcus mutans (MS)(n=20). Following incubation (37°C, 24hours), the vials were placed in a Spectrophotomoter (Genesys 20) at 600 nm to determine bacterial growth by
An electroconductive resin composite is produced by polymerizing at least one monomer a polymer of which is electroconductive in a matrix of a resin which exhibits the anisotropy in the melt phase to form a composite of the obtained polymer and the resin. The resin composite is obtained in the form of film and a moulded article.
A variety of therapeutic modalities, from implant to conventional Maryland prosthesis, can be used for the replacement of a missing anterior tooth. In patients refusing implant treatment, when minimal teeth reduction is preferred, a fibre reinforced composite (FRC) prosthesis can be a good alternative to conventional prosthetic techniques. The purpose of this case report is to describe the clinical procedure for fabricating hybrid type FRC prosthesis with pre-impregnated unidirectional E-glass fibres. Fibre-reinforced composite, in combination with adhesive technology, appears promising treatment option for replacing missing teeth. However, further clinical investigation will be required to provide additional information on this technique.
Clinical Trials - Evaluation of a new resin-based composite material. Amalgam and composite are the most commonly used restorative materials ...
Are you suffering from an embarrassing chip or discoloration on your tooth? Do you feel as though you dont have time for a long dental visit? Dont fret. Your dental fix is as easy as pie and as convenient as a single visit. How is it possible? With dental bonding.. There are many things that can lead to dental bonding. An active lifestyle, an accidental mishap, poor dental hygiene, even a bite into something hard can all cause our teeth to become damaged. But what does it entail to undergo dental bonding? Youll be surprised how simple the procedure really is. Granted, there is a little advance preparation is needed for dental bonding. Anesthesia is often not necessary unless the bonding is being used to fill a decayed tooth. Your dentist will use a shade guide to select a composite resin color that will closely match the color of your tooth.. Dental bonding involves the direct application of a tooth-colored composite resin to repair any chip or crack. The composite resin used in dental ...
This study aimed to investigate the influence of the moment of salivary contamination during the bonding procedure (before or after acid conditioning) on the microleakage around composite resin restorations. Sixty bovine incisors received two Class V preparations (one with dentin margins and other with enamel margins). Teeth were randomly assigned into three groups (n=20): 1) control (not contaminated); 2) salivary contamination before etching with 34% phosphoric acid; and, 3) salivary contamination after acid etching. Cavities were restored using Prime & Bond NT (Dentsply) adhesive system and TPH Spectrum (Dentsply) composite according to manufacturer instructions. Teeth were thermocycled (500x, 5-55°C, 60s/bath), immersed in 2% methylene blue buffered solution (pH 7.0), and sectioned into two halves. Three examiners measured the extent of dye penetration on dentin and enamel margins in a stereoscope microscope, using four representative scores. Statistical analysis were performed with ...
Dental composite resins are types of synthetic resins which are used in dentistry as restorative material or adhesives. When placed they look like your natural tooth ...
TY - JOUR. T1 - How should composite be layered to reduce shrinkage stress. T2 - Incremental or bulk filling?. AU - Park, Junkyu. AU - Chang, Juhea. AU - Ferracane, Jack. AU - Lee, In Bog. PY - 2008/11/1. Y1 - 2008/11/1. N2 - Objectives: The purpose of this study was to determine the effect of different layering techniques on cuspal deflection in direct composite restorations. Methods: Aluminum blocks were used to prepare MOD cavities divided into three groups. Each cavity was restored with composite using three different filling techniques. Group 1 was filled in bulk, group 2 was restored by a horizontal increment technique, and group 3 by an oblique increment technique. Cuspal deflection was measured with LVDT probes and compared among groups using ANOVA and Scheffes post hoc test (α = 0.05). Results: The cuspal deflections in groups 1-3 were 21.6 ± 0.90 μm, 19.3 ± 0.73 μm and 18.4 ± 0.63 μm, respectively. The bulk filling technique yielded significantly more cuspal deflection than the ...
Coltene Swiss TEC Composite hybrid composite ra-diopaque highly filled Shade A3 by Coltene Whaledent EXP 2018 or better Description: Quality at a favorable price SwissTEC Composite is a sculptable, ra-diopaque, highly filled fine hybrid composite which is cured in the tooth cavity or on the model with visible halogen
Resumo O objetivo nesse estudo foi utilizar o isobornil metacrilato (IBOMA) como monômero combinante ou substituinte na matriz resinosa de resinas compostas odontológicas. Para tanto, a matriz resinosa foi formulada com 60 % em peso de BisGMA e 40 % em peso de monômero diluente. O TEGDMA foi utilizado como único monômero diluente para o grupo controle com 40 % em peso, enquanto a substituição total de TEGDMA foi feita com 40 % em peso de IBOMA. Na combinação de IBOMA e TEGDMA foram utilizados 20 % em peso de cada monômero. Na matriz resinosa, 65 % em peso de partículas de carga foi adicionado. O grau de conversão (GC) utilizando FT-IR, a resistência flexural (RF), o módulo flexural (MF), a contração de polimerização por formação de gap (FG) utilizando Microscopia Confocal à Laser, a Dureza Knoop (DK) e a degradação em solvente (DS) foram avaliados. Todos os dados foram analisados utilizando ANOVA e teste de Tukey (α=0.05; b=0.2). Os resultados demonstraram que reduzindo ou
Our experts have the ability to produce accurate and fast composite product and materials test results for composites, and related materials. We support customers across the global aerospace, automotive, building, chemical, consumer, energy, manufacturing, medical, and materials industries with our world-leading facilities, experts, and solutions. Composite materials tested include thermoset and thermoplastic composites, laminates, fiber reinforced composites, core materials, resins, films and adhesives. ...
A fibrous composite material in the form of individual fibres, sheets, layers or lightweight blocks comprising non-combustible fibres and lamellae of a layer mineral, a method for the manufacture of the fibrous composite materials by applying lamellae of a layer mineral to the fibres preferably from suspension followed by removal of the liquid phase of the suspension, and use of the fibrous composite materials for the fire-protection of substrates.
Composite Materials from Henan Kingway Chemicals Co., Ltd.. Search High Quality Composite Materials Manufacturing and Exporting supplier on
Dental Core Build-Up - Core Paste Jars Enamel Kit - A composite resin system that has high compressive strength and superior handling. Stackable viscosity, cutting properties and dual-cure formula make it the ideal material for core build ups.
Septodont Endure Composite Kit Septodont Endure Composite Kit Endure Composite kit is a light cured , radiopaque , resin based dental restorative material with dentin bond and etchant gel kit. Contents of Kit are:- 3 x 4g Nanohybrid Composite Syringe
Dental Core Build-Up - Core Paste Jars White Kit - A composite resin system that has high compressive strength and superior handling. Stackable viscosity, cutting properties and dual-cure formula make it the ideal material for core build ups.
Minnetonka dentist, Ian Park, DDS is a local, trusted dental practice offering general and cosmetic dentistry, teeth whitening, implants, veneers & other dental care. Call today to make an appointment!
Composite resin is a suitable restorative material to restore an existing failed restoration, however it is unsuitable to restore a carious lesion due to the large amount of remineralizable dentin required to achieve a reliable adhesive base.. Glass ionomer cements (GIC) will adhere to caries affected dentin, minimizing the amount of tooth removal required to restore the tooth. Glass ionomer cement can be used as a restorative material in its own right or as a base for a composite resin overlay (sandwich restoration) where the remaining tooth structure is unsupported and requires a bonded composite to maintain its structural integrity.. For the following reasons glass ionomer cements are the material of choice for treating an active carious lesion:. • The weak bond strength of glass ionomer cement to sound and caries affected tooth structure does not affect the integrity of the restoration as there is not the polymerization shrinkage stress associated with composite resins.. • Glass ionomer ...
TY - JOUR. T1 - Comparative evaluation of shear bond strength of two nanofilled posterior composites as core build up materials. T2 - An in vitro study. AU - Ganerhiwal, Shakshi. AU - Gupta, Chandni. AU - Kundabala, M.. AU - Ginjupalli, Kishore. AU - Shenoy, Ramya. PY - 2016/9/1. Y1 - 2016/9/1. N2 - Core build up is necessary as a foundation for post endodontic restorations when the tooth structure is severely damaged, fractured or extensively carious. Core build up material should provide resistance and retention form for the coronal restoration and possess sufficient strength to resist occlusal forces. An ideal core build-up material should have physical properties similar to those of tooth structure where the occlusal biting loads are transferred to dentin. The study evaluated and compared the shear bond strength of two nanofilled resin composites Group A - Filtek Z350 XT and Group B - Filtek Bulk fill) as core build up materials. Eighteen extracted permanent human molar teeth were sectioned ...
TY - JOUR. T1 - Enamel and Dentin Bond Durability of Self-Adhesive Restorative Materials. AU - Latta, Mark A.. AU - Tsujimoto, Akimasa. AU - Takamizawa, Toshiki. AU - Barkmeier, Wayne W.. PY - 2020/1/1. Y1 - 2020/1/1. N2 - PURPOSE: To use shear bond strength (SBS) and shear fatigue strength (SFS) testing to determine the durability of adhesion of self-adhesive restorative materials compared to composite resin bonded with a universal adhesive. MATERIALS AND METHODS: A universal adhesive, Prime & Bond Active, was used in self-etch mode to bond Z-100 composite resin to enamel and dentin. Three commercially available restorative materials and one experimental material with self-adhesive properties, Activa (A), Fuji II LC(F), and Equia Forte (E) and ASAR-MP4 (S) were also bonded to enamel and dentin. The SBS and SFS were determined for all materials. A staircase method was used to determine the SFS with 10 Hz frequency for 50,000 cycles or until failure occurred. RESULTS: On enamel, S generated ...
Objectives: The present study examines the influence of cavity type, and size of composite restorations on cuspal flexure due to polymerization shrinkage. Methods: Thirty healthy premolars were selected and divided into two experimental groups. Group 1: Mesial, mesiodistal, and MOD cavities were successively prepared in each tooth by means of the SONICSYS approx system (KaVo ®) using a nº 2 (small) diamond tip. Group 2: The same cavity preparation sequence was followed but a nº 3 (medium) tip was used. Cavity preparations were performed and afterwards restored using the same adhesive system and resin composite. Cuspal displacement was measured 15 min after completion of each type of restoration. Results: Under the experimental conditions used, polymerization shrinkage of composite restorations resulted in an inward deflection of the cusps in all the situations evaluated. The Friedman global test found significant differences according to the cavity type and size (p,0.05). The Wilcoxon test ...
The aim of this study was to evaluate the effect of cyclic loading on the bond strength of fiber posts and short fiber-reinforced composite (FRC) to root canal. One hundred single-rooted teeth were divided into two groups according to the material used for luting fiber posts: (1) Resin-core material (Gradia Core, GC Corp.) and (2) Short FRC (EverX Posterior, GC Corp.). Then the specimens were randomly assigned into three sub-groups according to the post material and the groups are indicated as follows: (1) Short FRC (EverX Posterior) used instead of post and core, (2) Fiber post (GC post, GC Corp.) cemented with resincore (Gradia Core), (3) Fiber post (GC post, GC Corp.) cemented with short FRC (EverX Posterior), (4) Experimental fiber post cemented with resin-core (Gradia Core, GC Corp), (5) Experimental fiber post cemented with short FRC (EverX Posterior). Then the specimens were subdivided into a further two groups in accordance with the storage condition (cyclic loading and 24 h water ...
Aesthetic and Cosmetic dentistry can be a life changing experience for many people as it can restore confidence and self-esteem simply by improving their smile.. This gallery exhibits a range of results that Dr McIntosh (Angela) has achieved since opening Pearly Whites Dental in May 2014 to demonstrate examples of both simple and complex smile Aesthetic and Cosmetic restoration treatments and potential outcomes. Smiles in these photos have been primarily treated using modern composite resin where Angela has used her artistic and technical skills to create beautiful smiles. Angela sculptures teeth to look natural and provides effective, high quality alternatives to expensive traditional and overseas treatments that are often not in the reach of the average persons budget. Individual needs and results for Aesthetic and Cosmetic dentistry can vary and a consultation with Angela is necessary. A consultation will provide you with a selection of options to improve your smile whether it may be a ...
Figure 3: Lingual shelf (MW) and dentin (DA2/DA1) layers in place. The patient had two types of subtle white calcifications occurring on their natural enamel, which needed to be replicated in composite for ultimate esthetic blending of the final restoration. One type is a very soft and diffuse white splotchiness along the line angles and is best created using a bleach-white composite, which can be more easily feathered for the diffuse appearance. In this case, the BL1 composite works well, as it is a highly opaque white but can be feathered nicely. The BL1 composite was initially placed with a composite instrument, and excess composite was removed until a reasonable amount remained (Fig 4). Feathering and diffusing of the BL1 composite were then achieved using the OptraSculpt instrument (Ivoclar Vivadent), which has a small foam pad that makes it easy to wipe away the BL1 composite until the desired effect is achieved. ...
TY - JOUR AU - Miletić, Vesna AU - Marjanović, Jovana AU - Veljović, Đorđe AU - Stasić, Jovana AU - Petrović, Violeta PY - 2019 UR - AB - Objective To determine color changes in bulk-fill composite and universal composite restorations with dissimilar dentin replacement materials in extracted teeth after staining in red wine. Materials and Methods Cylindrical, 4 mm deep, class I cavities were prepared in 140 human molars. Bottom 2 mm was restored with Biodentine (Septodont), everX posterior (GC) or experimental HAP inserts. Each dentin replacement material was covered with a 2-mm layer of a universal composite Filtek Z250 or Z550 (3M ESPE) or Gradia Posterior (GC). Groups combining top composite layer and the underlying dentin replacement were designated as composite_dentin replacement. Filtek Bulk Fill (3M ESPE) and Tetric EvoCeram Bulk Fill (Ivoclar Vivadent) were placed as a single 4-mm layer. Color measurements were performed using ...
The properties of commercial and experimental small particle dental composite formulations and selected unfilled resins have been evaluated in a systematic way. The unfilled resins were evaluated for percent conversion, molar heat of cure and microhardness as a function of resin composition, and ambient temperature of cure. The results show that the ambient temperature and resin composition may significantly influence these properties. Moderately higher ambient temperature of cure in the range 40 to 60°C and proper resin selection was found to significantly improve the resin properties studied. The diametral tensile strength, top hardness, bottom hardness, thermal expansion (TE) coefficient, watersorption (WS), and average surface roughness of composite resins were also evaluated as a function of filler particle size (PS) and volume fraction (VF) in a series of experimental composites and in selected commercial systems. The results show a dominant contribution of filler VF to all the composite ...
Objective: There has been increased in vitro testing for possible degradation of resin composites and composite/dental tissue interfaces after bacterial challenge. Sample sterilization/disinfection is usually performed by immersion in ethanol or mild irradiation, with the unverified assumption that other methods would degrade the composite. We have systematically characterized surface modification of a composite sterilized with a number of methods, to test that immersion in ethanol is the only method that does not notably induce composite surface degradation. Methods: Light-cured FiltekTMLS (3M-ESPE) discs were sterilized by autoclaving (44min, 122.7oC, 22.6psi), X-Ray (90min, 120kV), O2-, Ar cold-plasma (45min), or 70%-ethanol (1min). Samples with or without sterilization were incubated in media for 3 days. Negative controls were run by adding thymol (0.25%). The absence of colony growth on blood-agar plates assessed sterilization effectiveness. Samples were characterized by visual inspection ...
6. India MS Resin (SMMA) market Status, Prospect (2011-2021). B] Worldwide MS Resin (SMMA) Market Size (Value and Volume) [2011 to 2021].. C] Worldwide MS Resin (SMMA) Manufacturers Analysis/Key Competitors :-. D] Global MS Resin (SMMA) sales and MS Resin (SMMA) market share by type [2011 to 2017].. E] Worldwide MS Resin (SMMA) revenue and growth rate [2011 to 2021].. F] Global MS Resin (SMMA) [Volume and Value] by Regions - USA MS Resin (SMMA) , China MS Resin (SMMA) , Europe MS Resin (SMMA) , Japan MS Resin (SMMA) (Volume, Value and Sales Price).. The report also produce extensively details about the description, definitions which are associated to the MS Resin (SMMA) industry and also highlights the modification and changes made to ease the productivity. These company chain and government permission applicable to the MS Resin (SMMA) market are also included in the report.. The characteristics of the MS Resin (SMMA) industry are evaluated in a qualitative and quantitative way to compare the MS ...
The surface characteristics of eight posterior and two anterior composite resins were studied by SEM and profilometric tracings. The materials included both chemically cured and light-cured resin systems. Two posterior materials were microfilled composites; the others were conventional or hybrid types. The anterior composites were of conventional and hybrid types. At various steps in the procedures the following polishing/brushing treatments were evaluated: 1) dry polishing with Sof-lex discs followed by brushing with toothpaste; and 2) wet polishing with diamond pastes of increasing fineness, followed by brushing with toothpaste. The base line before the polishing/brushing procedures was obtained by wet polishing on silicon-carbide paper (4000 grit). All materials could be polished to a comparable smoothness by the Sof-lex discs, but this polishing procedure was associated with the development of an amorphous surface layer. Polishing with diamond pastes gave various results, with a 20-fold ...
With regard to the fracture patterns, there was a predominance of failure at the interface independently of the superficial treatment. However, G2 (drying only) had the highest number of premature failures (Table 3).. Discussion. Since there were statistically significant differences between the treatments, the null hypothesis that - there is no statistically significant difference between the treatments - was rejected.. The union of resin layers, newly embedded on a cavity and light cured to new layers, is possible due to the presence of residual monomers and free radicals on the polymerized composite resin.9 However, if the resin surface is contaminated, these monomers and radicals may react with the contaminating agent making the union of resin increments impossible or inefficient.. This study evaluated the effect of blood contamination on the surface of light-cured resin layers, before the addition of new layers, simulating the filling procedure using polychromatic (shades A1 and A3.5) ...
Composite materials are made from two or more basic material mixed together. The materials can be natural or not, and keep their separate properties when mixed together. However, the composite material as a whole may behave differently from either of its parts. For example, reinforced concrete (made of concrete and steel) has resistance to pressure and to bending forces. Bullet-proof glass (made of glass and plastic) is more resistant to impact than either glass or plastic on their own. Concrete itself is a composite material, one of the oldest man-made composites, used more than any other man-made material in the world.[1] Wood is a natural composite of cellulose fibres in a matrix of lignin.[2][3] The earliest man-made composite materials were straw and mud combined to form bricks for building construction. This ancient brick-making process was documented by Egyptian tomb paintings. Fibre-reinforced polymers are in wide use today, as is glass-reinforced plastic. ...
Preface xv. About the Companion Website xvii. 1 Introduction 1. 1.1 Definition / 1. 1.2 Classification / 2. 1.3 Particulate Composites / 2. 1.4 Fiber-Reinforced Composites / 5. 1.5 Applications of Fiber-Reinforced Polymer Composites / 7. Exercise Problems / 15. References / 16. 2 Fibers, Matrices, and Fabrication of Composites 17. 2.1 Reinforcing Fibers / 17. 2.1.1 Glass Fibers / 19. 2.1.2 Carbon and Graphite Fibers / 25. 2.1.3 Aramid Fibers / 29. 2.1.4 Boron Fibers / 30. 2.1.5 Other Fibers / 31. 2.2 Matrix Materials / 33. 2.2.1 Polymers / 33. 2.2.2 Metals / 44. 2.3 Fabrication of Fiber Composite Products / 45. 2.3.1 Fabrication with Thermosetting Resin Matrices / 45. 2.3.2 Fabrication with Thermoplastic Resin Matrices / 59. 2.3.3 Sandwich Composites / 61. 2.3.4 Fabrication with Metal Matrices / 63. 2.3.5 Fabrication with Ceramic Matrices / 64. Suggested Reading / 65. 3 Micromechanics of Unidirectional Composites 67. 3.1 Introduction / 67. 3.1.1 Nomenclature / 68. 3.1.2 Volume and Weight ...
Among the 68 children included there was a 96% concordance between the OFC and BAT result for the diagnosis of PA. Of the 56 children with a positive OFC and BAT to peanut (median age: 8.8 years), severity of allergic reaction and cumulative threshold dose were not correlated (p=0.24). Higher Ara h 2-specific IgE and FcεRI-positive control values were both associated with severe reactions to peanut. Combining these two markers led to a 92% sensitivity [84%-97%] and 82% specificity [71%-89%] for severe reactions in all subjects. For children in the LCTG, a 4-variable composite marker including age, normalized basophil sensitivity (EC), and FcεRI- and fMLP-positive control values, resulted in 97% sensitivity [89%-99%] and 61% specificity [49%-71%] CONCLUSION: Distinct composite markers including BAT allergen-specific and non-allergen-specific parameters appear to be associated with severity and cumulative threshold dose in children with PA ...
Jason Smithson - lecture one. Artist-Technician - direct resin restorations. The three main problems encountered by all dentists in direct resin placement are: How to achieve invisible restorations How to avoid post operative sensitivity How to place adjustment free restorations. Dentistry is a branch of medicine, which encompasses science, art and mechanical engineering: the competent operator must be a master of all three disciplines. Dr Smithsons presentation will introduce the art of the anterior direct composite describing the protocol required to produce a class 4 restoration that is invisible to the human eye. This is followed by a more technical analysis of the process required to prepare and place a posterior composite resin restoration, which requires no or little occlusal adjustment. Finally, a novel technique is outlined which allows rapid restoration of deep class 1 cavities without post-operative sensitivity. This presentation is suitable for all levels.. Jason Smithson - lecture ...
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So, what sets these treatments apart? At the end of the day it is the materials used to repair or resurface your teeth.. Aesthetic veneers are made from exceptionally thin porcelain. A veneer is only as thick as a contact lens, but once it is in place it completely transforms the appearance of the tooth.. Dental bonding uses composite resin to achieve results. Composite resin begins as a soft, shapeable consistency. Our team applies the resin to a patients tooth, and then we cure it with a special light so that it hardens and bonds to the natural tooth.. These material differences affect their respective treatment processes. Veneers take two or three appointments to complete; first the teeth are prepped, then restorations are made to fit the patients teeth, and finally we attach them to the natural tooth structure. On the other hand, the dental bonding process takes just one appointment to complete. Our dentists shade, shape, and cure composite resin in one appointment.. A few other things to ...
Novel resin composite for paint to be used for painting the surfaces of steel plates and other plates therewith, which is non-volatile and sufficiently cured even in the air by high energy ionizing radiation, said resin composite being mainly composed of a prepolymer having α,β unsaturated double bonds at terminals and a molecular weight of more than 600 and a terminal double bond equivalent of more than 300, and a polyfunctional compound having more than two terminal α,β unsaturated double bonds, the compound ratio of both ingredients being 5 to 0.5 in terms of the terminal double bond equivalent ratio.
The composite oxide and the composite oxide carrier are manufactured by the precursor forming step and firing step. The precursor forming step includes high speed mixing means. The composite oxide catalyst is obtained by preparing a composite of catalytic components simultaneously with the formation of the precursor of composite oxide in the step of forming the precursor of composite oxide. The composite oxide and the composite oxide carrier are composed of a composite oxide in which at least one of cerium and zirconium, and aluminium disperse with extremely high homogeneity. With this structure, the heat resistance of the carrier is improved and consequently, enlargement of particles of the composite oxide defining the carrier, and sintering of adjacent particles of the composite oxide can be restrained, whereby the catalyst using the composite oxide carrier in accordance with the present invention is excellent in heat resistance. With the present invention, the carrier is not limited to a general
Detailed information on tooth fillings, including the different types such as dental amalgams, composite resins, porcelain veneers, crowns, and cast gold restorations
How is a dental bonding procedure performed?. When performing a bonding procedure, it is important to enable the composite resin to firmly adhere to the underlying tooth structure. To do this the surface of the tooth is etched and then painted with a liquid bonding agent just prior to the placement of the filling or cosmetic bonding. As the dentist places the composite resin, it is carefully sculpted to achieve the desired shape and then cured with a special light or allowed to set. Once hardened, the newly bonded restoration is polished and buffed for a smooth finish. Some dentists may offer composite veneers as an alternative to porcelain veneers, artistically bonding and blending successive layers of composite resin to transform the appearance of a tooth.. Caring For Bonded Teeth. While a bonding procedure offers an excellent and cost-effective method of care for the treatment of minor cosmetic dental issues, there are a couple of considerations with this approach. Teeth that are restored or ...
Maciel Eustáquio da Silva Júnior- Especialista em Dentística Restauradora (USP/Bauru-SP);- Mestre em Dentística Restauradora (UNESP/Araraquara-SP);- Doutorando em Dentística Restauradora (UNESP/Araraquara-SP);- Professor dos Cursos de Extensão e Especialização (FAEPO/Araraquara-SP).Marcelo Ferrarezi de Andrade- Mestrado e Doutorado (UNESP/Araraquara-SP);- Professor Adjunto do Departamento de Odontologia Restauradora (UNESP/Araraquara-SP ...
De-Tak is formulated to eliminate the tackiness between dental instruments and filled composite resins. Placement and contouring are now easier. The composite resin will not stick to the instrument, be it metal or plastic, and pull away from its desired shape. Frustrations are eliminated. Use De-Tak for placement and contouring of Light Cured and Chemical Cured (paste-paste) composites, micro-fill and hybrid resins. When used properly, it will not interfere with the setting, chemical or physical properties of the resin. Resins can be built up on surfaces that have been contoured with a De-Tak coated instrument. De-Tak can be used with any brand of restorative resin.. Product URL : ...
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The purpose of this article is to show a case where the dental and gingival aesthetics were involved. A periodontal treatment was performed aiming to health and...
Introduction: A good dental cement used as repair material should possess chemical binding, easy handling characteristics, minimal marginal breakdown and minimal polymerization shrinkage, high resistance to wear, high cohesive strength, and good color stability. This study was undertaken to compare the in vitro microleakage and shear bond strength among the newly introduced Prime fill flow and Dyad flow. Aim: The aim of this study was to determine the effect on shear bond strength and microleakage of two self-adhesive composite resin. Materials and methods: Selected specimens were collected and stored in deionized water with an antibactericidal agent, 0.2% sodium azide, until ready to be used and were randomly divided into two groups: group I: Dyad flow and group II: Prime fill flow; specimens were sheared with a universal testing machine, and the results were calculated in megapascal, specimens were sectioned in a mesiodistal direction at four different locations, and analyzed for leakage (dye ...
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A global dental events agenda created by you! Search by filter or upload events, for free. We will share all the courses with over 1 million dentists on our main Facebook Page ZERODONTO #YouPostWeShare ...
Our idea is to develop the novel composite material that contains microencapsulated polymer spheres containing coloured resins. These spheres will provide direct visual inspection possibilities as after impact the surface of the composite will change the colour depending on the severity of the impact. This composite material possesses also self-repairing feature for due to impact these shells containing different resins will broke and disengaged substance will rapidly repair damages of composite material ...
OptraSculpt Pad is an innovative modelling instrument for shaping and contouring direct composite resin filling materials without encountering stickiness. The highly flexible anti-stick surface of the special single-use synthetic foam attachments (pads) prevents unpolymerized composite resins from adhering to the instrument.. ...
A dental restoration or filling is a treatment that restores the function, integrity and morphology of the tooth structure caused by caries or trauma. It also includes the replacement of structural integrity using dental implants for missing teeth. Categorized by direct and indirect restorations, a comprehensive examination and diagnosis will be conducted before a treatment plan is agreed with you.. Although dental health has improved dramatically over the last few decades, lifestyle choices and physical trauma to the teeth will require treatment at some stage. Often, all a patient will need is the replacement of a filling or two; however, for more serious cases, further treatments and even complete tooth replacements are required. Age also plays a factor. These days, teeth last a lot longer than they did before, meaning the wear and tear of the natural tooth surfaces have become a bigger issue. To restore the appearance and function of your teeth, early intervention is key.. At Dental House ...
Composite Bonding can also be referred to as Cosmetic Bonding, Dental Bonding or Teeth Bonding. A white filling material, made of a composite resin is applied to the tooth and shaped to restore the appearance. The colour of the resin is matched to your teeth, so it will appear as though it is a natural part of the tooth.. Composite fillings are hard wearing and durable and can excellently match the colour of your tooth. It is a non-invasive procedure, unlike crowns or dental veneers where the tooth is permanently removed.. The composite bonding material is applied to the tooth and hardened. For composite bonding to be applied, the surface of the tooth only has to be cleaned to help the resin to bond, meaning the structure of the tooth remains intact. Minimal drilling is needed.. The material is essentially bonded to the tooth, hence the why the procedure is called bonding.. ...
A composite article that can be used as a substrate for coated conductors is disclosed. The composite substrate has at least three layers in which one or more inner layers of Ni--W alloys with 9 at. %-13 at. % W and two outer layers of Ni--W alloys with 3 at. %-9 at. % W. The content of W element gradually decreases from the inner layers to the outer layers. The composite substrate can be prepared using a process of designing and sintering composite ingot, rolling composite ingot and then annealing composite substrate. The composite substrate have a dominant cube texture on the outer layer of the whole substrate which have a weaker magnetism and higher strength than that of a single Ni-5 at. % W alloy substrate. the preformed composite ingot is prepared by filling and compacting the Ni--W mixed powders into a mold layer by layer according to the structure of composite substrate; in said mold, said preformed composite ingots are with the total thickness
NAFEMS Focus on Composites GLASGOW, UK, JANUARY 12TH 2010: In response to a recent upsurge of interest in composites analysis, NAFEMS, the International Association for the Engineering Analysis Community, has put together a series of events focusing on the subject, to give NAFEMS Members and the analysis community in general the opportunity to learn more about this topic, and share experiences with fellow analysts. Many designs now use composite structures or components, taking
TY - JOUR. T1 - Solvent Degradation and Reduced Fracture Toughness in Aged Composites. AU - Ferracane, J. L.. AU - Marker, V. A.. PY - 1992/1. Y1 - 1992/1. N2 - Quartz- and barium-glass-filled composites aged for more than one year in ethanol experienced a significant reduction in fracture toughness (KIc), essentially identical to that experienced after two months of aging. This reduction is mainly attributed to a softening of the resin matrix, but cracking within the resin and at the filler/ matrix interface, as revealed by SEM microscopy, may also have contributed. No significant cracking could be seen in the composites aged in water. Composites post-cured at temperatures approaching their glass-transition temperature also experienced a reduction in KIc after alcohol storage. Storage in water for one year had little effect on the KIc of composites cured at oral temperatures, but a significant increase was observed for those post-cured at elevated temperatures. This increase is difficult to ...
Methods of forming composite optical film (100) are disclosed. The methods include exposing a composite film to a first energy source (340) to cure the composite film to (321) a first cure state. The composite film includes reinforcing (102) fibers dispersed within a curable resin (104). Then the method includes removing the first energy source from the first cure state composite film and then exposing the first cure state composite film to a second energy source (341) to further cure the composite film to a second cure state. The method includes 10 combining the composite film with an optical element to from the composite optical film.
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Fillers in bonding agents facilitate stronger bonds because their presence reduces polymerization shrinkage, has a lower coefficient of expansion, and reduces water absorption of the bonding resin. When resins cure, they shrink, and the fillers provide a basic structure to counteract that shrinkage. When two different materials (such as a resin and a tooth) are exposed to temperature changes, they expand and contract at different rates. The fillers placed in resins typically have a coefficient of expansion that is similar to that of a tooth; therefore, the tooth and the resin expand and contract more closely to the same amount, placing less force on the tooth resin interface. Unfilled resins absorb water, which cause them to distort through a process called hydrolysis. The addition of fillers reduces the amount or degree of water absorption. This, again, places less detrimental force on the tooth-to-bonding-resin interface. The addition of fillers reduces the loss of bonding resin at the margin, ...
The present invention relates to a multiple layer composite material and to a method for producing the same. Said multiple layer composite material has at least one layer of cement-bound concrete and at least one layer of polymer-bound concrete. The transition between adjacent layers of cement-bound concrete and polymer-bound concrete has at least the material strength of the less stable one of the concrete layers adjoining the transition. The layer of polymer-bound concrete allows the diffusion of water vapor, but does not allow liquid water to penetrate. The multiple layer composite material can be produced completely in an aqueous system.
Dental resin composites are popular filling materials because of their excellent esthetics, direct-filling capability, and improved load-bearing properties . After being bonded to the tooth structure via adhesive , it is desirable to have a long-lasting restoration-tooth bonded interface. Although most adhesives exhibit excellent short-term bonding strength, the durability of the bonded interface still remains a challenge . Nearly half of all dental restorations fail within 10 years, and replacing them accounts for 50-70% of all restorations performed . This is costly, considering that the annual cost for tooth cavity restorations was about $46 billion in 2005 in the United States alone . The cost is increasing rapidly with an aging population, longer life expectancy, and increased tooth retention in seniors . Therefore, there is an urgent need to improve the dentin-resin interfacial bond to reduce failure and increase the longevity of dental restorations . The degradation of the hybrid layer at ...
Historical background of composites; classification and general properties. Role of the constituent materials in composite manufacturing, i.e. matrices and reinforcements; their types, production and properties. Polymeric matrix composites (PMCs). Metal matrix composites (MMCs). Ceramic matrix composites (CMCs). General manufacturing techniques of PMCs, MMCs and CMCs and their principles. Special purpose composites. Fiber-matrix Interface and interphase, and their role in tailoring the properties of composites. Interface mechanics and toughness. Design and analysis of composites. Elastic, thermal and physical properties. Thermal stresses in composites. Applications of composites. Joining techniques for composites. Machining of composites. Special structures in composite manufacturing; light weight structural cores; honeycomb cores, foams. Hybrid composites. The emerging field of nanocomposites. Composite materials as surface coatings. Testing of composites: constituent material testing, testing ...
... elastomers and composite materials. When the phrase waterborne resin is used, it usually describes all resins which have water ... Waterborne resins are sometimes called water-based resins. They are resins or polymeric resins that use water as the carrying ... An epoxy resin system generally consists of a curing agent and an epoxy resin. Both the curing agent and the epoxy resin can be ... The resin backbone is often modified to ensure water dispersibility. These resins dry in their own right by water/co-solvent ...
"Light Resin Transfer Moulding (LRTM)". BFG Architecture. Retrieved 2020-11-14. (Composite materials, Composite material ... Light resin transfer moulding (Light RTM) is a process by which products of Composite materials are manufactured using a closed ... After the air is removed the resin is injected into the part. The vacuum remains in effect into the resin is cured. "Light ... Similar to the methods performed in resin transfer molding, Light RTM involves a closed mold process. A vacuum holds mold A and ...
"Resin Transfer Molding - Closed Molding". CompositesLab. Retrieved 2020-11-10. (Composite materials, Composite material ... Resin transfer moulding is a process for producing high performance composite components. It is a process using a rigid two- ... Resin transfer moulding involves numerous varieties which differ in the mechanics of how the resin is introduced to the ... "What is Resin Transfer Moulding (RTM)?". Coventive Composites. 2018-04-25. Retrieved 2018-10-01. " ...
In Handbook of Wood Chemistry and Wood Composites, Rowell, R., Ed. Taylor & Francis: Boca Raton, FL, 2005; pp. 381-420. ... Resin flows through the lumen and pit network, ideally gaining access to all the cells, and then ideally the resin enters the ... This resin can be polymerized after impregnation into the wood substrate by oven-curing. UF resins are beginning to be used ... Although MF resins have this extra benefit, it is difficult to use them for impregnation resins because of the high free ...
Ortho resins comprise the most common type of UPR, and many are known as general purpose resins. FRP composites utilizing ortho ... For example, a resin containing primarily terephthalic acid is known as a Tere resin, a resin containing primarily phthalic ... There exists a special sub-set of Tere resins, known as PET UPR resins, which are produced by catalytically cracking PET resin ... This type of resin is known as a Nadic resin and is referred to as a poor man's Ortho, due to sharing many similar properties ...
"5.1.3 Epoxy Resins". Guide to Composites (PDF). p. 19. Retrieved 2022-10-21. Allsopp, M. W.; Vianello, G. (2012). " ... Some synthetic resins have properties similar to natural plant resins, but many do not. Synthetic resins are of several classes ... Prepolymer Resin casting Waterborne resins Pham, Ha Q.; Marks, Maurice J. (2012). "Epoxy Resins". Ullmann's Encyclopedia of ... A large category of resins, which constitutes 75% of resins used, is that of the unsaturated polyester resins. The production ...
... Resins. Wiley Encyclopedia of Composites. 1-15, doi: 10.1002/9781118097298.weoc062 Loos, A. C.; Kander, R. G.; ... Cyanate esters can also be mixed with bismaleimides to form BT-resins or with epoxy resins to optimize the end use properties. ... Love, B. J. (December 1997), ANALYSIS OF CYANATE ESTER RESINS AND GRAPHITE FABRIC FOR USE IN RESIN FILM INFUSION PROCESSING, ... Cyanate esters based on a bisphenol or novolac derivative are used in the production of resins. Cyanate esters can be cured and ...
... was incorporated into composite dental resins in 1962 by Rafael Bowen. Until matrix development work in the early 2000s ... Bis-GMA (bisphenol A-glycidyl methacrylate) is a resin commonly used in dental composite, dental sealants. and dental cement. ... Fugolin AP, Pfeifer CS (21 July 2017). "New Resins for Dental Composites". J. Dent. Res. 96 (10): 1085-91. doi:10.1177/ ... Soderholm KJ, Mariotti A (February 1999). "Bis-GMA-based resins in dentistry: are they safe?". The Journal of the American ...
"3D-Printable Antimicrobial Composite Resins". Adv. Funct. Mater. 25 (43): 6756-6767. doi:10.1002/adfm.201502384. "Mish's Global ... Materials can range from plastic and polymers as thermoplastic filaments, to resins, and even stem cells. Three-dimensional ... "3D Printed Clothing Becoming a Reality". Resins Online. June 17, 2013. Archived from the original on November 1, 2013. ... the group of Professor Andreas Herrmann at the University of Groningen has developed the first 3D printable resins with ...
... in order to cure the resin-based composite, and claimed to cure resin composite material within 3 seconds. In practice, however ... A dental curing light is a piece of dental equipment that is used for polymerization of light-cure resin-based composites. It ... "Curing lights for Composite Resins". Health Mantra: Your Mantra for Health, Wealth and Prosperity!. Health mantra. Retrieved 14 ... In the early 1960s, the first light curing resin composites were developed. This led to the development of the first curing ...
... composite materials from epoxy resins); 3DGence (manufacturer of 3D printers); Genicore (manufacturer of ovens for composite ... "New Era Materials , Composites , Epoxy Resin , Innovation , Labs". Retrieved 2021-03-31. "About us - ...
Many commercially produced composites use a polymer matrix material often called a resin solution. There are many different ... Composites can also use metal fibres reinforcing other metals, as in metal matrix composites (MMC) or ceramic matrix composites ... Composites Design and Manufacturing HUB Distance learning course in polymers and composites Composite Sandwich Structure of ... In 2007, an all-composite military Humvee was introduced by TPI Composites Inc and Armor Holdings Inc, the first all-composite ...
Dental composite Resin dispensing Spin casting Harper, Charles A. (2003). In Plastics Materials and Processes: A Concise ... polyurethane resin, epoxy resin, unsaturated polyester resin, acrylic resin and silicone resin. Epoxy resin has a lower ... resin casting may be accomplished with a resin plus a nearly equal amount of a "hardener" liquid (as in many epoxy resin or ... Resin casting is a method of plastic casting where a mold is filled with a liquid synthetic resin, which then hardens. It is ...
Lenhard, M (2008). "Closing diastemas with resin composite restorations". The European Journal of Esthetic Dentistry. 3 (3): ... Possible treatments to correct angularis nigra include addition of composite resin in the space, veneer placement, or gum graft ...
Same Qualified Resin Transfer Molding (SQRTM) is a closed mold composites manufacturing method similar to RTM (Resin Transfer ... Resin transfer molding (RTM) is a method of fabricating high-tech composite structures. The RTM process is capable of ... The process can use thermosetting, thermoplastic prepregs (pre-impregnated composite fibers), and wet resin with dry fiber to ... Having the mold heated and under vacuum, as in Vacuum Assisted Resin Transfer Molding (VARTM) assists the resin flow. The mold ...
For VARTM to create high quality composite parts it is crucial that air leakages are avoided. Air leakages can cause resin to ... Normally the process is capable of producing composites with a fiber volume fraction between 40 and 50%. The resin to fiber ... composite manufacturing process. VARTM is a variation of Resin Transfer Molding (RTM) with its distinguishing characteristic ... polyester or vinyl ester resin along with fiberglass fibers to create a composite. ...
Beland, S. (1990). High performance thermoplastic resins and their composites. William Andrew. Díez-Pascual, A. M., Naffakh, M ...
It makes synthetic resins and composite materials. Since 1951 it has expanded and is now international, employing around 700 ...
Formica is a brand of composite materials manufactured by the Formica Corporation. In common use, the term refers to the ... Melamine resin is often used in kitchen utensils and plates (such as Melmac). Melamine resin utensils and bowls are not ... Melamine resin or melamine formaldehyde (also shortened to melamine) is a resin with melamine rings terminated with multiple ... The crosslinking can be carried out to a limited degree to give resins. Either the melamine-formaldehyde resins or melamine- ...
Composite Panel Association: Hardboard European Panel Federation: Hardboard (Articles with short description, Short description ... although resin is often added. Hardboard is produced in either a wet or dry process. The wet process, known as the Mason Method ... "Hardboard, Perforated Board, Underlayment, Office Furniture - Composite Panel Association". Archived from the original on 2015- ... Phenolic Resins: Chemistry, Applications, Standardization, Safety and Ecology. Berlin: Springer. p. 142. ISBN 3540655174. " ...
ChemicaInvest consists of three business units; Aliancys (composite resins), AnQore (acrylonitrile) and Fibrant (caprolactam). ... DSM Resins & Functional Materials manufacture resins solutions for paints, inks, stereolithography, and industrial and optical ... 2021: Resins & Functional Materials business to Covestro AG. 2022: Protective Materials business to Avient Corporation 2022: ... The Materials cluster is made up of DSM Engineering Materials, DSM Protective Materials and DSM Resins & Functional Materials. ...
Another combination of composite resin and glass ionomer technology, with focus lying towards the composite resin end of the ... Glass ionomers are about as expensive as composite resin. The fillings do not wear as well as composite resin fillings. Still, ... The cost is similar to composite resin. It holds up better than glass ionomer, but not as well as composite resin, and is not ... Composite resin fillings (also called white fillings) are a mixture of nanoparticles or powdered glass and plastic resin, and ...
"Bio-Composites Update: Bio-Based Resins Begin to Grow". Composites World (April). 2008. Retrieved 2008-11-25. Dawe, Bob; ... "Methods of preparing casting resins and coating compositions using polyols derived from high oleic acid content fatty acid ... acid catalyzed ring opening of soy fatty acid methyl esters with multifunctional polyols to form new polyols for casting resins ...
5 Direct composite veneer restorations where the whole labial surface is covered with resin, are good treatment options in such ... Clinical studies have found that 60 to 80% of all Class III and V composite resin restorations remain acceptable after 5 years ... Millar, B J; Robinson, P B; Inglis, A T (January 1997). "Clinical evaluation of an anterior hybrid composite resin over 8 years ... Lee, Yong-Keun; Lim, Bum-Soon; Kim, Cheol-We (2002). "Effect of surface conditions on the color of dental resin composites". ...
The price of the vinyl ester resin is similar to that of the polyester resin. It utilizes the same hardeners as polyester resin ... These resins can be utilized in making shape memory composites. Depending on their formulation, they have varying visual ... Epoxy resin is, when cured, nearly transparent. Polyester resin is fit for most backyard projects. It tends to have a yellowish ... Vinyl ester resin has a lower viscosity than polyester resin and is more transparent. It also tends to have a purplish to ...
On average, amalgam lasts twice as long as resin composites, takes less time to place, is tolerant of saliva or blood ... Teaching of amalgam techniques to dental students is declining in some schools in favor of composite resin, and at least one ... Sources of mercury from the diet, and the potential harm of the composite resins to replace the purportedly harmful amalgam ... Stein, PS; Sullivan, J; Haubenreich, JE; Osborne, PB (2005). "Composite resin in medicine and dentistry". Journal of Long-Term ...
No composite wood or agrifiber products contain urea-formaldehyde resins. Heating and cooling systems operate on non- ...
In composite materials, epoxy, polyester or phenolic resins are common. In reinforced carbon-carbon, plastic or pitch resin is ... Tensile strength is greatly improved in composite materials consisting of resin as the matrix and fiber as a reinforcement. ... Other binding agents such as resins may be tough and possibly elastic but can neither bear compressive nor tensile force. ...
Polyurethanes are another group of resins used in advanced composite processes. These compounds are formed by reacting the ... Of these, epoxy systems currently dominate the advanced composite industry. Thermoset resins require addition of a curing agent ... Pilato, L.; Michno, Michael J. (January 1994). Advanced composite materials (Chap 1 Introduction, and Chapter 2 "Matrix Resins ... Phenolic and amino resins are another group of PMC resins. The bismaleimides and polyamides are relative newcomers to the ...
Michael Biron: Thermosets and composites : material selection, applications, manufacturing, and cost analysis. Elsevier, ... some authors refer to resins based on furfuryl alcohol and furan as furan resins, while others use the term only for resins ... In the resin and in the cured polyfurfurol, the furan rings are not connected by conjugation. The resins are generally used as ... Furan resins exhibit good thermal stability. Continuous use at 100-120 °C is routine. Some furan resins can even be used at up ...
Building 1 Alkyd resins for automotive finishes Building 228 Nylon polyamide synthetic polymers Polyvinyl chloride development ... New Fibres and Their Composites," Philosophical Transactions of the Royal Society of London, Series A, 294(1411) 463-472 (1980 ... Building 256 Surlyn ionomeric resins Teflon FEP Fluorinated ethylene propylene Elvax ethylene vinyl acetate copolymers Elvaloy ... butyral for laminated safety glass Selar RB hydrocarbon barrier nylon resins Minlon mineral-reinforced nylon engineering resins ...
1965 - used resin-impregnated corrigated cardboard to make a "paper surfboard" for which there was a television commercial and ... He married Jolly Givens in 1958 and worked for Douglas Aircraft, as a process engineer in composites. After Douglas, he worked ... a series of jobs involving composite materials and processes, which he applied to his surf-related inventions. He left the ...
It is a precursor to unsaturated polyester resins, used to make fiberglass composites for boats, cars, wind turbine blades and ... Ethylene glycol, a liquid, was used to manufacture polyethylene terephthalate resins (PET) for the bottling industry, ...
DMA serves as a promoter in the curing of polyester and vinyl ester resins. DMA is also used as a precursor to other organic ... Wiley-VCH, Weinheim.doi:10.1002/14356007.a27_179 General Info on DMA (N,N-Dimethylaniline), Composites Australia Brimecombe, R ...
It is mainly used resins based on epoxy resin. Vinyl ester-based prepregs are also available. Since vinyl ester resins must be ... Composite material Carbon fiber reinforced polymer Out of autoclave composite manufacturing Chawla, Krishan K. (2012). ... Vinyl ester resin is used under high impact stress. The properties of the resin and fiber constituents influence the evolution ... such as epoxy or phenolic resin, or even thermoplastic mixed with liquid rubbers or resins. The fibers often take the form of a ...
Through Strider Research Corporation (SRC) he consults in nanotechnology, advanced polymeric composites and materials, and IP ( ... Wiesner groups at Cornell to create reactive solvent-free nanofluids to create new resins and materials and exotic cross- ...
Some high-end rigid heat shields are made out of aluminum sheet or other composites, with a ceramic thermal barrier coating to ... Two basic types of aerodynamic heat shield have been used: An ablative heat shield consists of a layer of plastic resin, the ... This type was used on the Space Shuttle, consisting of ceramic or composite tiles over most of the vehicle surface, with ... production and testing of a new class of ultra-refractory ceramic matrix composites reinforced with silicon carbide fibers and ...
Most modern composite sticks roughly resemble the Tourte design. Various inventors have explored new ways of bow-making. The ... Rosin, or colophony, a hard, sticky substance made from resin (sometimes mixed with wax), is regularly applied to the bow hair ... such as carbon fiber epoxy composite and fiberglass. For the frog, which holds and adjusts the near end of the horsehair, ebony ...
A wooden figure of either the god Osiris or of the composite deity Ptah-Sokar-Osiris could be found, along with heart scarabs, ... The body was sometimes colored with a golden resin, which protected the body from bacteria and insects. Additionally, this ... conifer resin and aromatic plant extracts). By the First Dynasty, some Egyptians were wealthy enough to build tombs over their ...
The UHTC composite ZrB2/20 vol%SiC can be prepared with 99% density at 2,000 °C in 5 min via spark plasma sintering. ZrB2-SiC ... have synthesized ZrB2 powders using the inorganic-organic precursors ZrOCl2•8H2O, boric acid and phenolic resin at 1,500 °C. ... Conductivity at 500 °C was found to be 0.005 Ω cm for the 40% SiC composite, versus 0.16 Ω cm in pure SiC. Wuchina, E.; et al ... Composite materials must have each component degrade at the same rate, or the wettability and thermal conductivity of the ...
Besides epoxy resins based on diglycidyl ether of bisphenol A, other polymer networks have been used to produce vitrimers, such ... reactions were also developed by James Economy's group at UIUC in the 1990s including consolidation of thermoset composite ...
... when composite-bodied cars in the style of the Generation 6 were mandated (despite this, modern ARCA cars still use Gen 4 ... "Resin NASCAR Buick/Chevy V6 Busch Grand National Engine , #443476133". "1994 Chevrolet Lumina NASCAR , F260 , Kissimmee 2012 ...
From storax, the resin of the Oriental sweetgum tree Liquidambar orientalis, he distilled an oily substance, a monomer that he ... In recent years the expanded polystyrene composites with cellulose and starch have also been produced. Polystyrene is used in ... It is an inexpensive resin per unit weight. It is a poor barrier to oxygen and water vapour and has a relatively low melting ... Styrene-acrylonitrile resin (SAN) has a greater thermal resistance than pure styrene. Polystyrene foams are produced using ...
It has also been reported that adding CNT to polyacrylonitrile (PAN)/CNT fiber composites decreases the fibrillation tendency ... and a plastic-resin reaction chamber attached with a vacuum pumping system, inlet and outlet gas valves and a ZnSe lens system ... Min, Byung; Sreekumar, T.V.; Uchida, Tetsuya; Kumar, Satish (2005). "Oxidative stabilization of PAN/SWNT composite fiber". ...
A resin backing was used on the film, which rendered the film too opaque to allow focusing through the back of the film, a ... composite visual effects, and color grade the image digitally at full resolution and bit-depth. In this workflow, the answer ...
Composite War Head Body (122 mm) Composite War Head Body (TOROS) Composite War Head Body 122 mm Composite Barrel Heat Jacket ... Resin Mixture Seats - Driver/Operator Security System For Garrison And Headquarters For Military shock mounts Single Piece ... Composite Gas Discharge Unit Composite Launch Tube (122 mm) Composite Launch Tube (TOROS) Composite Launch Tube 122 mm ... chemicals and composite material Composite Materials Carbon cleaner Composite Ballistic Equipment Composite Parts For High ...
This resin adds to the small group of 3D-printable resins and is one of the few that are biocompatible. A laser 3D-printed ... Shape memory composite structures incorporating highly conductive metallic surface layers have also been demonstrated to be ... photo-curable liquid resin. This resin is made of a renewable soybean-oil epoxidized acrylate compound that is also ... This research article is one of the first that explore the use of plant oil polymers as liquid resins for stereolithography ...
Epoxy and Vinyl Ester resins; Hardeners for Epoxy Resins containing Amides or Amines; Accelerators for Vinyl Esters; HTPB; ... composite materials; hunting knives and machetes; optical equipment, such as lasers and night vision goggles; certain ... Industrialized forms for casting concrete Plastic or composite beams more than 4 mm thick Thermal isolation materials and ...
... can also be used as a reinforcement material in the manufacture of composite materials. Glassflakes or glass flake ... distribution of diameter Glass flakes may be surface treated by silane coupline agents for better coupling with resin which is ...
... are a phenolic resin/cellulose composite material made from partially recycled paper and phenolic resin ... especially if made with paper and epoxy resin. Ebonol, a paper and phenolic resin compound sometimes used for fingerboards in ... Because of the resin's thermoset properties the resulting cooled material is hard. It was used for the Boeing 747 for their air ... The paper is then soaked in phenolic resin and goes up to a heating chamber to be dried out before being rolled back up. Then ...
... such as addition of composite resin) or to create guide planes for easier insertion and removal of the denture. Rather than ...
... composite resins MeSH D25.339.149.200 - bisphenol a-glycidyl methacrylate MeSH D25.339.149.300 - compomers MeSH D25.339.208 - ... composite resins MeSH D25.720.716.822.308.200 - bisphenol a-glycidyl methacrylate MeSH D25.720.716.822.308.300 - compomers MeSH ... resins, synthetic MeSH D25.720.716.822.111 - acrylic resins MeSH D25.720.716.822.111.650 - polymethacrylic acids MeSH D25.720. ... D25.720.716.822.461 - epoxy resins MeSH D25.720.716.822.730 - resin cements MeSH D25.720.722 - polyanetholesulfonate MeSH ...
In 2016, the Cirrus Vision SF50 became the first certified light jet made entirely from carbon-fiber composites. In February ... The 2013 Bombardier CSeries have a dry-fiber resin transfer infusion wing with a lightweight aluminium-lithium alloy fuselage ... Michael Gubisch (9 July 2018). "Analysis: Are composite airframes feasible for narrowbodies?". Flightglobal. (Articles with ... composites are increasingly used since in Airbus airliners: the horizontal stabilizer of the A320 in 1987 and A330/A340 in 1994 ...
The wood composite layer can be applied on only one side of the profile if so required. The wood fibers to resins ratio as well ... Advanced composite materials (engineering) Composite material Hybrid material "Sadao Nishibori Inventions, Patents and Patent ... Materials, Building materials, Composite materials, Composite material fabrication techniques, Engineered wood). ... The wood composite covers a core in anodized aluminum core. The optimal adhesiveness between these two materials is made ...
Pine, fir, spruce, and cedar are all examples of conifers that are used for lumber, paper production, and resin. Some other ... The term gymnosperm comes from the composite word in Greek: γυμνόσπερμος (γυμνός, gymnos, 'naked' and σπέρμα, sperma, 'seed'), ...
Finer Y, S.J.; Santerre, JP (2004). "The influence of resin chemistry on a dental composite's biodegradation". J Biomed Mater ... of the dental resin since salivary esterases are able to cleave the ester bonds in acrylic polymers of dental composites. ... 2,2-Bis[4(2,3-hydroxypropoxy)phenyl]propane (bis-HPPP) is an organic compound that is formed when the dental composite material ... which is used in the formation of epoxy resins. Structurally, it is a di-ether of bisphenol A. Together with methacrylic acid, ...
... apparent resin content of material in the unmoulded state) ISO/R 309 Manganese ores - Methods of sampling ISO/R 309-1:1963 ... Test conditions for isotropic and orthotropic fibre-reinforced plastic composites ISO 527-5:2009 Part 5: Test conditions for ... Homopolymer and copolymer resins of vinyl chloride - Determination of pH of aqueous extract ISO 1265:2007 Plastics - Poly(vinyl ... Homopolymer and copolymer resins of vinyl chloride ISO 1060-1:1998 Part 1: Designation system and basis for specifications [ ...
... followed by more exotic composite materials including spectra, vectran and carbon fiber. The various composite materials are ... Traditionally, canoes were made of tree bark, sewn with tree roots and sealed with resin. Early whitewater boats were made of ... which will be made out of kevlar/fiberglass/carbon fiber composites to be lightweight and have faster hull speed. Plastic ...
... which received light-cured composite resin, or group II, which received light-cured resin-reinforced ... ...
and North American Composites (NAC), a wholly owned entity of IP Corporation, have announced a distribution agreement for epoxy ... resins in the U.S. NAC will represent Hexion and its extensive line of epoxy resins, curing agents and modifer ... Azelis to Offer the Only Authorized Source of Phenoxy Resins in Europe ...
... with epoxy resin & comparison with fly ash reinforced composite. Specimens in the form of cube of size 10X10X10 (mms) are used ... Fracture behaviour of composite can also be studied using SEM. SEM analysis is done to observe distribution of fly ash ... particles in matrix, resin fly ash interface, glass fibre matrix interface, glass fibre distribution etc,. ... There has been significant increase in use of glass fibre reinforced composites as structural materials in naval mine ...
OSUNG Dental Composite Instrument, Flowable Resin, CT 15 [3CSCT15]. Sale price$29.99 ... Osung Composite instrument, Metal handle, CSAT6. Sale price$36.99 Regular price$55.95 ... Osung Composite Instrument, Plastic handle, 3CSCOM11. Sale price$30.99 Regular price$37.95 ... Osung Composite Instrument, Plastic handle, 3CSCT1. Sale price$29.99 Regular price$37.95 ...
Laboratory Investigation of the Failure and Reinforcement of Fibre-Reinforced Resin Composite Bridgework. ...
Resin Type, Product Type (Fabric, Plate, Rebar, Mesh,... ... Epoxy resin construction repair composites are the fastest- ... PRNewswire/ -- The Global Construction Repair Composites Market by Fiber Type (Glass, Carbon), ... 7 Construction Repair Composites Market, by Resin Type. 7.1 Introduction. 7.1.1 Construction Repair Composites Market Size, by ... 7.3.1 Epoxy Resin-based Construction Repair Composites Market Size, by Region. 7.4 Others. 7.4.1 Other Resins-based ...
EP-1528081-A2 chemical patent summary.
Choose from 14 Composite Resin Inlay or Onlay Clinics in Middlesex, UK with 26 verified patient reviews. ... Composite Resin Inlay or Onlay prices from £69 - Enquire for a fast quote ★ ... Composite Resin Inlay or Onlay Middlesex, UK. All 14 Composite Resin Inlay or Onlay Clinics in Middlesex, UK. ... Composite Resin Inlay or Onlay prices from £69 - Enquire for a fast quote ★ Choose from 14 Composite Resin Inlay or Onlay ...
Combined with the infrared spectrum, the mechanical enhancement mechanisms of the dental resin composites were analyzed. ... dental resin composites. The effect of the filling content of nano-SiO2 particles on the mechanical properties of the dental ... can apparently increase the hardness and elastic modulus of the dental rein composites. The plasticity index indicates a best ... composites was studied as well. The experimental results showed that the incorporation of the nano-SiO2 particles at low ...
... explores how resins can affect a composites properties. ... More from Exel Composites. *The importance of resin selection ... The importance of resin selection in composite materials. Home , Materials , The importance of resin selection in composite ... Resins can also add entirely new properties to a composite solution. Resin additives can be incorporated into the resin to ... Here, Sami Pirinen, Chemist and Resin Expert at Exel Composites, explores how resins can affect a composites properties and ...
Suitability of a linseed oil epoxy resin for composite applications. Suitability of a linseed oil epoxy resin for composite ... Benega, Marcos Antonio Gimenes (2019) Suitability of a linseed oil epoxy resin for composite applications. University of ... The use of linseed oil derived epoxy resins in composite structures is limited. The conventional epoxy systems still have ... The use of linseed oil derived epoxy resins in composite structures is limited. The conventional epoxy systems still have ...
Lifetime predictions for resin-based composites using cyclic and dynamic fatigue. John I. McCool, Kenneth G. Boberick, George R ... Lifetime predictions for resin-based composites using cyclic and dynamic fatigue. Journal of Biomedical Materials Research. ... Lifetime predictions for resin-based composites using cyclic and dynamic fatigue. / McCool, John I.; Boberick, Kenneth G.; ... McCool, JI, Boberick, KG & Baran, GR 2001, Lifetime predictions for resin-based composites using cyclic and dynamic fatigue, ...
46151-K Solid Carbide CNC Spektra™ Extreme Tool Life Coated Spiral Phenolic, Resin and Composite with Chipbreaker 3/8 Dia x 1 x ... 46153-K Solid Carbide CNC Spektra™ Extreme Tool Life Coated Spiral Phenolic, Resin and Composite with Chipbreaker 1/2 Dia x 1-1 ... 46150-K Solid Carbide CNC Spektra™ Extreme Tool Life Coated Spiral Phenolic, Resin and Composite with Chipbreaker 1/4 Dia x 3/4 ... Solid Carbide Composite End Mill Point Diamond Pattern CNC Router Bits. *Solid Carbide Composite and Concrete End Mill Point ...
The produced resin was applied in the preparation of fiber-reinforced composites. These composites can be used to create strong ... 143-3 Canola-Based Epoxy Resins for Bio-Based Plastic Composites. See more from this Division: U.S. Canola Association Research ... More flexible but less strong composites were obtained as the initial content of canola oil-based epoxy resin increased. Our ... This research group has established a lab-scale process to produce canola resins. A canola oil-based epoxy resin was produced ...
Composite Fasteners, Specialty Compatibility Red Hawk: FN15S; Senco: SPFN15XP; Omer: B17P.763, 17P.32 ... 15 Gauge Composite Finish Nails - Thermoplastic Resin & Fiberglass. 15 Gauge Composite Finish Nails ... Gauge Composite Finish Nails Composite Plastic Diamond Point Fiberglass Straight Strip Thermoplastic Resin Thermoplastic Resin ... Categories: 15 Gauge Composite Finish Nails, Composite Fasteners, Fasteners, Specialty Fasteners Tags: 15 Gauge 15 ...
The tannin resin penetration into the wood veneer was observed by light microscopy. The laminated composite shows very good ... The tannin resin used showed a good compatibility with the natural fiber, and was easy to assemble with the wood veneers. ... The laminated composite was prepared using 100% natural biorenewable raw materials and had good properties compared to ... Shear force-displacement testing demonstrates that the laminated composite had a ductile behavior under wet testing conditions ...
Fumed Silica - Composite Resin Filler. HomeResins & CoatingsFillersFumed Silica - Composite Resin Filler. ... General Purpose Polyester Fiberglass Resin Kit. $54.99. - $389.99. Fiberglass Resin Kit. Our General Purpose Fiberglass Resin ... Fumed Silica Resin Filler. Thickening powder for polyester and epoxy resins that helps to prevent sagging on vertical surfaces. ... Resin Pigment Variety Pack. These highly concentrated pure resin pigments give you amazing color and luster. Our variety pack ...
The Crestaform Durable resin is a high-performance 3D printing resin with superior mechanical performance and excellent ... Composites. * CiPP Brochure - Pipe-Relining. Download * Crestafire Building and Construction - English. Download ... Crestaform® Durable 3D printing resin The Crestaform® Durable resin is a high-performance 3D printing resin with superior ... This 3D printing resin has excellent mechanical performance, with high reactivity and fast printing speeds to help increase ...
... ... Resin composite restorations were placed in 21 cavities, and the remaining 21 were restored with glass-ionomer cement. The ... Conclusion: Resin composites and glass-ionomer materials provide excellent functional and esthetic results in Class III ... A clinical evaluation was initiated to compare the suitability of resin composite and glass-ionomer cement materials for such ...
The resins that are used to produce composites and can withstand high temperatures are known as high-temperature composite ... Global high-temperature composite resin market expected to reach USD 1,298 million by 2024, at a CAGR of 9.5% between 2018 and ... UK High-Temperature Composite Resin Market Volume, by Resin Type, 2015 - 2024 (Tons) 29. UK High-Temperature Composite Resin ... High-Temperature Composite Resin Market - Global Industry Analysis. High-Temperature Composite Resin Market by Resin Type ( ...
Shear bond strength of metallic brackets bonded with four different composite resins Authors. * Fábio Lourenço Romano Dental ... composite; Group 2 - Concise restorative composite; Group 3 - Concise diluted restorative composite (Artun and Zachrissons ... Artun J, Zachrisson B. Improving the handling properties of a composite resin for direct bonding. Am J Orthod. 1982; 81: 269-76 ... Shear bond strength of metallic brackets bonded with four different composite resins. Braz. J. Oral Sci. [Internet]. 2016 Jan. ...
Effect of Mode of Polymerization of Bonding Agent on Shear Bond Strength of Autocured Resin Composite Luting Cements. Share on ... Purpose: There have been anecdotal reports of low bond strength with autocured resin composite materials, particularly when ... if the mode of polymerization of the bonding agent influences the strength of the attachment of autocured resin composite ... With significant interaction among the above variables, the least square means of the 16 combinations of resin cement and ...
Before polishing, the resin composites with the lowest surface roughness were Opus Bulk Fill APS (0.383 ± 0.186 µm) and ... This in vitro and longitudinal experimental study consisted of 120 resin blocks of 6 mm diameter and 4 mm depth, ... The present study aimed to assess surface roughness in bulk fill and conventional nanohybrid resins with and without polishing ... However, after polishing the other bulk fill and conventional nanohybrid resins with and without oxygen inhibited layer control ...
Composite Technology, Vacuum-infusion-RTM above-120-min up-to-120--C single-comp--Resin-Hardener slightly-yellowish ... like resins, hardeners, glues etc. the transport services calculate surcharges. These costs at the rate of 3.50 € incl. VAT are ... For dangerous goods like resins, hardeners, glues etc. the transport services calculate surcharges. These costs at the rate of ...
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Composite veneers are used to treat cosmetic dental issues like stained teeth, crooked teeth, or chipped or cracked teeth ... What is Composite Resin?. Dental composite resin is a special material that is applied and sculpted to the tooth. Once the ... Composite resin is a less expensive, tooth-colored material frequently used for veneers. While composite resin veneers might ... What are Composite Veneers?. Composite resin veneers are a porcelain alternative derived from translucent resin and ...
View more ,Since the first application of indirect composite resins, numerous advances in adhesive dentistry have been made. ... Since the first application of indirect composite resins, numerous advances in adhesive dentistry have been made. Furthermore, ... The Use of Indirect Resin Composites in Clinical Practice: A Case Series. ... composition and polymerization echniques led to the development of a second-generation of indirect resin composites (IRCs). ...
... verification of a resin film infusion/resin transfer molding simulation model for fabrication of advanced textile composites. ... For a given specified cure cycle, the computer model can be used to calculate the resin infiltration, resin viscosity, resin ... computer model for the simulation of the resin transfer molding/resin film infusion processing of advanced composite materials ... Formulations of the resin flow problem are given using the finite element/control volume technique based on Darcys Law of flow ...
DINIZ, Jiordanne Araújo et al. Effect on hydroeletrolitc reposition microhardness of composite resins. Odontol. Clín.-Cient. ( ... Aim: To investigate the effect of electrolyte replacers on the microhardness of composite resins. Materials and Methods: Using ... sixteen specimens were fabricated composite resin brands Rok ®, Herculite ® Classic, Filtek TM P-60 ® and ® EstelitΣ, color B2 ... Analysis was performed Vickers microhardness of resins each week exposure. Data were analyzed using descriptive and inferential ...
Posts about resin-based fillings written by What Doctors Dont Tell You ... QUESTION FROM READER:COMPOSITE FILLINGS. What Doctors Dont Tell You Q:In October 1994, I had my amalgam fillings removed as a ...
  • For the model to be accurate & useful material property data determined experimentally by taking different weight percentage of glass fibers (E-300, mat form) with epoxy resin & comparison with fly ash reinforced composite. (
  • M. Singla and V. Chawla, "Mechanical Properties of Epoxy Resin - Fly Ash Composite," Journal of Minerals and Materials Characterization and Engineering , Vol. 9 No. 3, 2010, pp. 199-210. (
  • Epoxy resin composites are sometimes more preferred in construction repair applications because of their low shrinkage and higher strength. (
  • However, if an application requires a greater degree of stiffness or strength, then an epoxy resin is preferable. (
  • The bonding between an epoxy resin and the fibre is strong, which means higher shear loads can be transferred between fibres, giving the composite better strength values. (
  • Combined with the higher volume of fibres that the epoxy resin allows for, a composite with excellent strength and high stiffness can be made, which can be modified further to suit high temperature applications if required. (
  • The first consisted of blending them with conventional epoxy resin (DGEBA) cured by conventional and phenalkamide hardeners. (
  • This ultra low-wattage heater comes with a controllable thermostat to find the perfect working temperature for your Epoxy Resin application. (
  • In the front is a bezel made of concrete and epoxy resin, with a gritty look and texture that evokes the streets of New York's "Concrete Jungle," which provide the watch its nickname. (
  • Although inorganic fillers have been mixed into composite resin matrix to enhance the strength, toughness and wear resistance of the dental resins, there are still some issues in dental restorations, processing and biocompatibility. (
  • A clinical evaluation was initiated to compare the suitability of resin composite and glass-ionomer cement materials for such restorations. (
  • Resin composite restorations were placed in 21 cavities, and the remaining 21 were restored with glass-ionomer cement. (
  • If you would like more information on composite resin restorations, please contact us or schedule an appointment for a consultation. (
  • The effect of surface sealants with different filler content on microleakage of Class V resin composite restorations. (
  • Microleakage is still one of the most cited reasons for failure of resin composite restorations. (
  • The aim of this study is to evaluate the microleakage in Class V resin composite restorations with or without application of surface sealants with different filler content. (
  • Composite filling - Tooth colored restorations, also known as resin fillings. (
  • More dentists are choosing composite fillings instead of amalgam for their durability, their ability to closely match the color of natural teeth, and especially for their mercury-free nature. (
  • Composite fillings restore strength to the tooth, protect from decay, and last up to twenty years. (
  • Composite resin fillings are light in color and made with a mixture of acrylic and quartz fillers. (
  • Because not all insurances cover composite fillings, many dental professionals still offer amalgam, particularly in cases where the filling is needed on molars or teeth that are less visible and experience more wear. (
  • Today, composite fillings are white. (
  • Composite resin fillings are a very popular option, as they are affordable, and their color can be customized. (
  • While indirect fillings are similar to composite fillings, they differ in that they are produced in a lab. (
  • Voids were observed in most of the resin composite fillings, and most VPS were observed in the occlusal area of the samples. (
  • Photo-activated dental materials, including certain sealants, resin-based cements and composite restorative materials, are an integral part of a general dental practice. (
  • For a given specified cure cycle, the computer model can be used to calculate the resin infiltration, resin viscosity, resin advancement, heat transfer within the component/tool assembly during processing and preform compaction. (
  • With this handy shop tool, you'll never again have to pre-heat your resin to lower viscosity or to improve wetting-out of reinforcement fabrics. (
  • The carrier resin has moderate viscosity and good compatibility. (
  • The resin is supposed to have a viscosity of 200 mpas. (
  • I'm thinking lowering the resin temp 10 degrees will give me 30 minutes and heating the mold an extra 10 degrees will 'theoretically' reduce the viscosity back to normal. (
  • You will do well heating the mold but deliberately cooling the resin is probably not necessary and will increase the viscosity in the tube. (
  • Introduction: The purpose of this study is to evaluate the effect of three storage temperatures on microhardness of high and low viscosity bulk-fill materials and compare them with conventional resin-based composite materials. (
  • When these oils are epoxidized, their viscosities are greatly increased which prevents their use in the production of composites, especially via resin transfer moulding and infusion. (
  • The objective of this study was to develop a two-dimensional computer model for the simulation of the resin transfer molding/resin film infusion processing of advanced composite materials. (
  • It will speed the infusion time but waste a lot of resin. (
  • Both the gel coat and infusion resin will be colored. (
  • The objective of this study was to assess the shear bond strength of metallic brackets with different types of Concise composites and the Adhesive Remnant Index (ARI). (
  • Purpose: There have been anecdotal reports of low bond strength with autocured resin composite materials, particularly when light-cured bonding agents that combine primer and adhesive in a 1-bottle preparation are used. (
  • With significant interaction among the above variables, the least square means of the 16 combinations of resin cement and adhesive were compared.Results: There was no consistent relationship between shear bond strength and mode of polymerization of the bonding agent. (
  • Since the first application of indirect composite resins, numerous advances in adhesive dentistry have been made. (
  • We offer adhesive systems made specifically for use with composites. (
  • Carrier resin is used as adhesive of prepregs and molding compound with DAP. (
  • The Alpha-Dent® Self-Cure Bonding Adhesive is intended for the bonding of composite resin bonding components to dentin and enamel. (
  • The cavities restored with an adhesive system (Clearfil SE Bond, Kuraray, Tokyo , Japan ) and resin composite (Clearfil Majesty ES-2, Kuraray, Tokyo , Japan ). (
  • Use adhesive on adjacent teeth to ensure a good fit without worrying about the composite bonding to nearby teeth. (
  • The tannin resin used showed a good compatibility with the natural fiber, and was easy to assemble with the wood veneers. (
  • You can instantly improve your smile with composite resin veneers! (
  • Composite resin is a less expensive, tooth-colored material frequently used for veneers. (
  • While composite resin veneers might wear down quicker than their porcelain counterpart, they are easier to repair and cost less. (
  • Although composite veneers typically have a shorter shelf life than porcelain veneers, they offer an affordable and convenient option that requires a far smaller investment of time and money. (
  • Composite veneers require less or no enamel removal. (
  • If your composite veneer requires a lab, the steps are similar to porcelain veneers. (
  • Composite veneers have many advantages, namely being cost-effective while not sacrificing quality. (
  • Direct composite veneers are sculpted onto your teeth rather than at a lab. (
  • Arguably, the biggest benefit of composite veneers is reversibility. (
  • While many patients prefer composite veneers to porcelain veneers, porcelain veneers, with proper care, can be a great option. (
  • Porcelain veneers typically last between 10-15 years, while composite resin dental veneers last around 4-8 years. (
  • How to Get Composite Veneers Near Me? (
  • If you are interested in getting composite veneers, our dental team is here for you! (
  • Our dentists can help you decide if composite veneers are the right option for you or determine if you would benefit more from porcelain veneers or one of our other cosmetic dentistry services. (
  • What are Composite Veneers? (
  • Composite resin veneers are a porcelain alternative derived from translucent resin and meticulously sculpted and hardened by your dentist, typically in a single appointment. (
  • While they use the same materials, composite veneers are more functional than aesthetic treatments. (
  • What Issues Can Composite Veneers Help With? (
  • Often referred to as "chair-side veneers," composite veneers are designed by the dentist directly on your tooth, requiring a dentist's technique combined with an artist's eye. (
  • Typically, composite veneers can be placed in just one visit, but porcelain veneers usually require multiple visits before being placed. (
  • How Long Do Composite Veneers Last? (
  • If you maintain a strict and comprehensive routine, your composite resin veneers can last at least 5 years and as long as 10! (
  • A class full of tips and techniques for creating great composite veneers with high attention to detail, using the right materials and tools. (
  • Unlike dealing with porcelain, creating great composite veneers requires a high degree of artistry and the ability to perform well in the moment. (
  • The Main Question: What do Dentists Need to Do to Create Great Composite Veneers? (
  • Composite resin veneers are an excellent alternative for those looking for a little less expensive solution that simply requires one dentist appointment. (
  • Composite Resin - Composite veneers are veneers that are not quite as durable as porcelain but are more easily replaced and repaired. (
  • While porcelain veneers are not reversible, composite veneers are. (
  • Like composite veneers, they can last between 10 and 20 years but may be removed if needed. (
  • Coatings and adhesives for packaging applications have unique demands of resin and polymer technologies. (
  • Lubrizol dispersants and resins enhance the performance of inks and coatings for analog and digital printing applications. (
  • Specifically, bisphenol A (BPA) is used in the manufacture of polycarbonate plastics and epoxy resins, which have been used in baby bottles, as protective coatings on food containers, and as composites and sealants in dentistry. (
  • Objective The aim of the present study was to evaluate the surface roughness (Ra) of the Z-350 resin composite following immersion in different media (distilled water, coca-cola, coffee, black tea and red wine). (
  • Conclusion Based on the present findings, coca-cola, coffee and black tea exert an influence on the surface roughness of resin composites. (
  • This in vitro study evaluated the influence of 4 surface sealers on the surface roughness of composite resins. (
  • The direct composite resin veneer can be used to correct gapped, chipped, poorly shaped, and stained teeth. (
  • The tooth-shaded resin is directly applied to teeth where it can be shaped, sculpted, and polished to elicit a more natural, tooth-like appearance. (
  • Minimal prep work is done to your teeth when it comes to composites, meaning that they are not permanently altered to such an extent that the composite material cannot be removed and replaced as needed. (
  • If you have worn, chipped, or damaged teeth, composite resin can be directly sculpted onto the teeth for exponential results. (
  • Cavities of the buccal surfaces of the left maxillar molar, premolar, canine and incisive teeth were filled with amalgam, cavities of the buccal surfaces of the left mandibular molar, premolar, canine and incisive teeth were filled with glass ionomer cement and cavities of the buccal surfaces of the right mandibular molar, premolar, canine and incisive teeth were loaded with resin composite. (
  • It was concluded that amalgam and resin composite were more usable than glass ionomer cement in teeth, which were exposed to stress however, resin composite as a restorative material is more demandable if esthetical reason is preferred in veterinary dentistry. (
  • But a relatively inexpensive method that's less involved is to bond dental material called composite resin to your teeth to correct defects. (
  • If you're looking to change the way your front teeth look, here are 3 reasons to consider composite resins to restore them. (
  • By contrast, we can colorize, bond and shape composite resins to your teeth in just one visit: you could gain your "new smile" in just one day. (
  • You can also learn more about this topic by reading the Dear Doctor magazine article " Artistic Repair of Front Teeth with Composite Resin . (
  • The composite resins are placed in bulk and are very good at adapting to teeth cavity walls because the polymerization and thermal shrinkage coefficients are low. (
  • The placement of the teeth must be perfect for the resins to stick. (
  • The teeth with resins are very durable and can easily be repaired by adding more resins. (
  • Training yourself to notice the small details on adjacent teeth gives you the knowledge you need to create a composite that's nearly indistinguishable from the nearby adjacent teeth. (
  • Dentists fill teeth by removing the decayed tooth material with a drill and replacing it with a material such as composite resin, glass ionomer, or amalgam. (
  • Composite resin is the preferred material today, as it more closely matches the natural tooth appearance, and is also strong enough to use anywhere in the mouth, including the back teeth, where the majority of chewing takes place. (
  • The resin is added to your teeth as a liquid before being cured and polished. (
  • Bonding - Application of tooth-colored resin materials to the surface of the teeth. (
  • maleic anhydride thermoplastic resin with Wood Flour added as a biofiller. (
  • Effect of filler-fiber interactions on compressive strength of fly ash and short-fiber epoxy composites. (
  • FGCI's fumed silica is a thixotropic resin filler that adds anti sagging qualities to your resin when applied to vertical surfaces. (
  • filler type (Silux Plus, a microfill or P-50, a hybrid): and shade (Universal or Gray) on the polymerization of resin composite within the depth of a simulated photopolymerized restoration. (
  • Nowadays the composites are divided into various classes depending on the type and size of the filler particles. (
  • Synthetic resins, containing an inert filler, that are widely used in dentistry. (
  • There has been significant increase in use of glass fibre reinforced composites as structural materials in naval mine countermeasure surface ships. (
  • Huang Z.M. Tensile strength of fibrous composites at elevated temperature , Materials Science and technology, January 2000, vol 16. (
  • Ericsion P W & Plueddeman E P. History background of interfaces-studies and theories & composite materials Vol 6 ,1974. (
  • Thomsons J L. The influence of Fibre properties of glass -fibre - reinforced polyamide6,6 Journal of composite materials, vol. 34, no. 02/2000. (
  • When selecting materials for a composite solution, many people become preoccupied with one decision: glass or carbon fibres? (
  • The laminated composite was prepared using 100% natural biorenewable raw materials and had good properties compared to conventional plywood bonded with synthetic resin. (
  • Conclusion: Resin composites and glass-ionomer materials provide excellent functional and esthetic results in Class III cavities when properly indicated. (
  • This technique allows for the efficient numerical calculation of the advancing resin front within the preform materials. (
  • The aim of the study was to compare the clinical usage of filling materials such as amalgam, glass ionomer cement and resin composite. (
  • CTD's novel, microcrack-resistant, polymer-matrix composite materials will enable the manufacture of 5 to 10 meter diameter tanks for heavy lift and launch vehicles, as well as propulsion technologies for spacecraft in orbit. (
  • Made of synthetic resins, these restorative materials can mimic your own natural tooth color. (
  • Let's meet at The International Trade Fair for Composite Materials, Technologies and Products KOMPOZYT-EXPO - one of the most important events of the composites industry in Poland and Central and Eastern Europe. (
  • New Era Materials is a leading company in composite materials and additive manufacturing in the region. (
  • JEC World, the leading global trade show dedicated to composite materials, their manufacturing technologies and application markets, will take place in Paris from 3-5 May, 2022. (
  • Join New Era Materials team and discuss composites for a sustainable world. (
  • Dental Composite materials for direct anterior and posterior composite bonding. (
  • Creating high-quality composites in real time means that dentists must master the required techniques and have a deep understanding of the tools and materials they will be using during the procedure. (
  • Premium materials such as black anodized aluminum and fiberglass composite resin give you a tablet that feels reassuringly strong. (
  • Composite materials used in dentistry indicate adverse biological effects in laboratory conditions. (
  • A positive correlation (r(x, y) = 0.62) between the degree of conversion of composite materials and cytotoxic effects of their eluates on cell cultures was confirmed. (
  • Bakopoulou A, Papadopoulos T, Gerefis P. Molecural toxicology of substances released from resin based dental restorative materials. (
  • Composite panels can be made up of several different materials such as wood, wheat, or plastic fibers. (
  • These materials can be printed at hundreds of pounds per hour by the world's largest polymer 3D printer, located at the UMaine Composites Center. (
  • Inlay - An artificial filling made of various materials, including porcelain, resin, or gold. (
  • Dental composite resins, also known as resin-based composites, are dental cement composed of synthetic resins. (
  • Composite resin - A tooth colored resin combined with silica or porcelain and used as a restoration material. (
  • The shell is usually thin and made from porcelain resin. (
  • Resin composites generally consist of a polymeric matrix involving visible-light-cured bisphenol-α-glycidyl methacrylate (Bis-GMA), diluted with agent triethylene glycol dimethacrylate (TEGDMA). (
  • For a light-cured resin-based restoration to function and last as intended, it must receive the required amount of light energy at the proper wavelength (i.e., the wavelength of the photoinitiator) to facilitate optimal polymerization (or curing). (
  • The first light-cured resins used in dentistry date to the early 1970s and were cured using ultraviolet (UV) LCUs. (
  • Global high-temperature composite resin market expected to reach USD 1,298 million by 2024, at a CAGR of 9.5% between 2018 and 2024. (
  • The resins that are used to produce composites and can withstand high temperatures are known as high-temperature composite resins. (
  • The report covers a forecast and an analysis of the high-temperature composite resin market on a global and regional level. (
  • The complete study covers the key drivers and restraints of the high-temperature composite resin market along with their market impact within the forecast period. (
  • Furthermore, the study also includes the opportunities accessible within the high-temperature composite resin market on a global level. (
  • In order to offer the users of this report, a comprehensive view of the high-temperature composite resin market, we have enclosed a detailed value chain analysis. (
  • To know the competitive landscape within the market, an analysis of Porter's Five Forces model for the high-temperature composite resin market has additionally been enclosed within the study. (
  • The study also includes the market share of the key participants operating in the high-temperature composite resin market across the globe. (
  • The study also provides a crucial view of the high-temperature composite resin market by segmenting the market based on resin type, manufacturing process, application, and region. (
  • By manufacturing process, the global high-temperature composite resin market includes lay-up, filament winding, injection molding, extrusion compression molding, and others. (
  • By application, the global high-temperature composite resin market includes transportation, aerospace and defense, electrical and electronics, and others. (
  • Bishara SE, Thunyaudom T, Chan D. The effect of temperature change of composites on the bonding strength of orthodontic brackets. (
  • Epoxies are mainly used with high-performance composites, which have superior mechanical properties and high resistance to chemicals, heat, or corrosion. (
  • The effect of the filling content of nano-SiO 2 particles on the mechanical properties of the dental composites was studied as well. (
  • Combined with the infrared spectrum, the mechanical enhancement mechanisms of the dental resin composites were analyzed. (
  • The present paper aims to examine the mechanical properties of the dental resin composites with various nano-SiO 2 particle content using nano-mechanics testing system. (
  • A cost effective way to make a weight-saving composite solution is to use an unsaturated polyester resin, which possesses relatively good mechanical, electrical and chemical properties. (
  • The laminated composite shows very good mechanical properties and water resistance. (
  • The Crestaform ® Durable resin is a high-performance 3D printing resin with superior mechanical performance and excellent reactivity. (
  • This 3D printing resin has excellent mechanical performance , with high reactivity and fast printing speeds to help increase efficiency within the production process. (
  • Annealing the resultant composites leads to coalescence of the Teflon, resulting in very stable membranes with significantly enhanced mechanical properties. (
  • Glass fiber reinforced composites was also prepared and their chemical and mechanical properties were checked out. (
  • Results: The only statistically significant difference between the resin composite and glass-ionomer cement restorati ons in the experimental perid involved color or esthetics. (
  • Effect of time on the shear bond strength of glass ionomer and composite orthodontic adhesives. (
  • Carrier resin is a special carrier resin for magnesium oxide powder without styrene. (
  • Styrene (ST) is widely used to manufacture resins, glass-reinforced plastics, and a number of commercially important polymers (Miller et al. (
  • oz. each) - 105 Resin + 205 Hardener - 3.36 fl. (
  • For both the resin component and the hardener component individual safe handling instructions exist, be aware of potential health problems in case of unsuitable exposure. (
  • Weight ratios are usually expressed in parts of hardener per 100 parts of resin. (
  • Dental resin composites have been widely used for restoring dental defects and caries instead of conventional metallic dental amalgam due to their sufficient strength, superior biocompatibility, and excellent esthetics [1] [2]. (
  • Model composites were made in which one variable was the presence of a silanizing agent, and specimens tested in 4-point flexure. (
  • Methods Fifty specimens of resin composite measuring 10 mm x 2 mm were prepared. (
  • Laminating adhesives and composite resins are cured using heat and/or heat and pressure. (
  • For example, since resins naturally decompose when left in sunlight, adding ultraviolet absorbers to resist UV radiation allows composites to achieve a better performance in sunny environments that would normally cause embrittlement and disintegration of the material. (
  • The composite material is typically applied to the surface of the tooth and molded into shape by your dentist, thus giving you a timely yet effective smile makeover. (
  • This computer simulation model is designed to provide aircraft structure and tool designers with a method of predicting the infiltration and curing behavior of a composite material component. (
  • A Composite resin is a type of material that is used to fill a cavity after the tooth decay has been removed. (
  • More recently, however, dental practices have transitioned into using composite resin for the increased health benefits as well as the aesthetic appeal of the natural colored material. (
  • In this dental technique, the composite material is frequently placed directly to the tooth and sculpted on the spot. (
  • Resinas sintéticas que contienen un material de relleno inerte y que se utilizan ampliamente en estomatología. (
  • However, the NRT 2007 study identified ACM remaining in demolition debris on-site, including Transite fragments (ranging from ca . 2-30 cm. in diameter), asbestos-resin adhered to brick, asphalt roofing material, and concrete board. (
  • In the field of restorative dentistry, the use of composites has become widespread with increasing aesthetic demand. (
  • Learn all of the composite dentistry that you may be missing in your practice and how doing more of it can benefit you financially and professionally. (
  • Peutzfeld A. Resin components in dentistry: The monomer system. (
  • Unique technologies help disperse pigment and functional additives in plastics and composites applications. (
  • In the bottom-up mechanism, NMPPs can be emitted during high energy or high heat processes (such as laser cutting or high-speed drilling), treatment of polymer composites, [2] and during 3D printing from melting or fusing of plastics [3, 4, 5, 8] (Figure 1). (
  • Alternatively, if a composite not only needs to be stiff, but also resistant to harsh environments, vinyl ester resins may be a better choice. (
  • The molecular structure of vinyl ester facilitates chemical resistance, so if a composite is destined for a marine environment or an industrial application where acids or alkalis are present, using a vinyl ester will improve the composite's performance. (
  • The range consists of four products: a vinyl ester primer for concrete pools, a vinyl ester tie-layer resin, a vinyl ester fillcoat, and a high quality topcoat based on our Aquaguard™ technology. (
  • Carrier resin has high activity, carrier resin can be mixed with pigment then be used with other resins. (
  • Chand N. SEM observations of fractured fly-polyester composites. (
  • Thickening powder for polyester and epoxy resins that helps to prevent sagging on vertical surfaces. (
  • Impregnating the fibres with resin followed by curing the resin allows us to engineer their strength, stiffness and light weight for a variety of applications, while adding even more benefits to the composite. (
  • This work studies aspects of the synthesis, curing and properties of cured epoxy resins derived from linseed oil. (
  • The second curing procedure was done using a blend of ELO and TELO with a commercial UV-curable resin derived from linseed oil. (
  • 4 Examples of concerns about early UV-curing LCUs included resin color instability, limited depth of cure, and UV-promoted tissue damage, such as acute and longer-term eye damage. (
  • A preclinical light-curing simulator called MARC (Managing Accurate Resin Curing) 10 was developed to help clinicians learn proper curing techniques. (
  • The association of precooled composite resin and the use of the LED curing units could be recommended to improve resin-based composite hardness. (
  • As for the resin selection, there are many choices available, as well as the option to incorporate resin additives, to meet the application requirements. (
  • Resin additives can be incorporated into the resin to achieve a range of benefits, from a simple improvement in surface finish or the addition of colour, to more complex enhancements, such as UV resistance or antimicrobial and antiviral properties. (
  • Similarly, antimicrobial additives can be blended into a resin to prevent bacteria or fungi contamination. (
  • It's important to note that, in some cases, the inclusion of resin additives can alter the properties of a composite. (
  • In some cases, for example, fire retardant additives are needed in such high quantities to work efficiently that you must reduce the number of fibres in the composite, reducing its strength and stiffness. (
  • Chamis, C C. Mechanics of load transfer at the interface (from matrix to fiber of composites) Interfaces in polymer matrix composites. (
  • The carbon fiber composites find wide uses in various end-use applications. (
  • The increasing demand from these applications is expected to drive the carbon fiber construction repair composites market during the forecasted period. (
  • Natural nonwoven fiber was impregnated with a tannin resin and laminated with wood veneer for preparation of laminated composites. (
  • Graded structures are expected to offer a significant reduction in price as compared to currently-used composite overwrapped pressure vessels (COPV), in which the cost of the carbon fiber alone can constitute over 60% of the total cost of the vessel. (
  • But the F-35 represents a new dimension of composites integration in a military craft, embodying a host of resin, fiber, molding and post-mold technologies that, I believe, will make this aircraft a milestone in composites design and manufacturing. (
  • Jiangsu Fiber Composite Co., Ltd. (
  • Researchers at the Advanced Structures and Composites Center and Oak Ridge National Laboratory investigated the impact of micro-cellulose fibers (MFC) on foaming behavior in an MFC-polylactic acid feedstock, allowing for increased long-term sustainability and economical solutions in new applications of additive manufacturing. (
  • Each of these features can be made more dominant by using a resin that complements them. (
  • The first commercial attempts to prepare resins from epichlorohydrin were made in 1927 in the United States. (
  • Unlike other 1022 stocks on the market, the TITAN 1022 is made of a highly rigid fiberglass composite, giving up almost no flex, which makes it the preferred platform for precision shooting. (
  • The global construction repair composites market is projected to grow from USD 331 million in 2021 to USD 533 million by 2026, at a CAGR of 10% between 2021 and 2026. (
  • The construction repair composites products are mainly used in various applications such as bridge, water structure, silo flue pipes, and many more. (
  • We have our own technical department, after you test the sample, please tell us your detailed requests, we are able to adjust the resin according to your requests, and bring better properties to your finished products. (
  • Get the most from our Composite products by taking one of our Continuing Education Courses. (
  • Apart from this, many new composites have been produced in order to protect the healthy tooth structure, to reduce microleakage and secondary caries formation, to reduce marginal pigmentation and postoperative sensitivity together with developments in technology. (
  • Abstract: Canola-Based Epoxy Resins for Bio-Based Plastic Composites. (
  • The pH of the bonding agent depends on the manufacturer's formulation, and low pH may contribute to low bond strength.Conclusions: The low in vitro bond strength occurring with some combinations of bonding agent and resin cement could be clinically significant. (
  • Thanks to the bonding techniques used with composite resins, we can preserve much more of the existing tooth while still achieving a high degree of artistry and lifelikeness. (
  • Some of the shortcomings include the shrinkage and leakage of the carriers, which leads to inferior bonding between the resins and the tooth. (
  • The mesh and tubing will also be factored into total resin needed. (
  • It will throttle resin flow and make removing the mesh easier - especially from a single skin area only 0.03'-ish thick. (
  • Furthermore, improvements in structure, composition and polymerization echniques led to the development of a second-generation of indirect resin composites (IRCs). (
  • From lhe data, a mathematical model that predicts the extent of resin polymerization based upon the above stated variables was generated. (
  • The results are of great clinical use and indicate that the most significant factor influencing resin composite polymerization is thickness of overlying resin composite. (
  • The predictive model for resin composite polymerization provided a very good fil (r 2 = .949). (
  • Shear force-displacement testing demonstrates that the laminated composite had a ductile behavior under wet testing conditions. (
  • Our ULTRATEC™ VE Tie-Layer resin is ideally suited for the construction of barrier laminates directly behind the gelcoat in swimming pool construction. (
  • It is the highest quality resins, glass, and gelcoat for the money. (
  • A wide range of resin and binder technologies help formulators meet coating challenges for paper and nonwoven applications. (
  • The mold is fiberglassed on the inside with 6 ounch cloth and resin. (
  • Glass fibre reinforced cement composites Part A 31 (2000) 391-403. (