Composite Resins: Synthetic resins, containing an inert filler, that are widely used in dentistry.Materials Testing: 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.Dental Materials: Materials used in the production of dental bases, restorations, impressions, prostheses, etc.Acrylic ResinsBisphenol A-Glycidyl Methacrylate: 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.Methacrylates: Acrylic acids or acrylates which are substituted in the C-2 position with a methyl group.Dental Restoration, Permanent: 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)Resins, Synthetic: Polymers of high molecular weight which at some stage are capable of being molded and then harden to form useful components.Dental Polishing: Creation of a smooth and glossy surface finish on a denture or amalgam.Polymethacrylic Acids: 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.Resins, Plant: 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)Hardness: The mechanical property of material that determines its resistance to force. HARDNESS TESTS measure this property.Dental Stress Analysis: 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.Dental Bonding: 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.Light-Curing of Dental Adhesives: The hardening or polymerization of bonding agents (DENTAL CEMENTS) via exposure to light.Curing Lights, Dental: 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.Surface Properties: Characteristics or attributes of the outer boundaries of objects, including molecules.Polyurethanes: A group of thermoplastic or thermosetting polymers containing polyisocyanate. They are used as ELASTOMERS, as coatings, as fibers and as foams.Dental Restoration Wear: Occlusal wear of the surfaces of restorations and surface wear of dentures.Resin Cements: 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)Nanocomposites: Nanometer-scale composite structures composed of organic molecules intimately incorporated with inorganic molecules. (Glossary of Biotechnology and Nanobiotechology Terms, 4th ed)Silanes: 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.Dental Cements: 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.Crowns: 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.Dental Restoration Failure: Inability or inadequacy of a dental restoration or prosthesis to perform as expected.Zirconium: Zirconium. A rather rare metallic element, atomic number 40, atomic weight 91.22, symbol Zr. (From Dorland, 28th ed)Pliability: The quality or state of being able to be bent or creased repeatedly. (From Webster, 3d ed)Dental Cavity Preparation: 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)Compomers: 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.Polymerization: Chemical reaction in which monomeric components are combined to form POLYMERS (e.g., POLYMETHYLMETHACRYLATE).Self-Curing of Dental Resins: 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.Tensile Strength: 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)Dental Enamel: 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)Dentin-Bonding Agents: 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.Dental Marginal Adaptation: 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.Acid Etching, Dental: Preparation of TOOTH surfaces and DENTAL MATERIALS with etching agents, usually phosphoric acid, to roughen the surface to increase adhesion or osteointegration.Dentin: 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)Glass Ionomer Cements: 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.Post and Core Technique: Use of a metal casting, usually with a post in the pulp or root canal, designed to support and retain an artificial crown.Prosthesis Coloring: Coloring, shading, or tinting of prosthetic components, devices, and materials.Saliva, Artificial: A solution used for irrigating the mouth in xerostomia and as a substitute for saliva.Glass: 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.Shear Strength: 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.Siloxanes: Silicon polymers that contain alternate silicon and oxygen atoms in linear or cyclic molecular structures.Phosphoric Acids: Inorganic derivatives of phosphoric acid (H3PO4). Note that organic derivatives of phosphoric acids are listed under ORGANOPHOSPHATES.Ion Exchange Resins: High molecular weight, insoluble polymers which contain functional groups that are capable of undergoing exchange reactions (ION EXCHANGE) with either cations or anions.Inlays: 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.Silorane Resins: Polymeric resins containing a combination of SILOXANES and OXIRANES.Color: The visually perceived property of objects created by absorption or reflection of specific wavelengths of light.Dental Restoration Repair: The process of repairing broken or worn parts of a PERMANENT DENTAL RESTORATION.Tooth Fractures: Break or rupture of a tooth or tooth root.Silicon Dioxide: 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.Dental Etching: 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.Dental Cavity Lining: 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)Gold Alloys: Alloys that contain a high percentage of gold. They are used in restorative or prosthetic dentistry.Microscopy, Electron, Scanning: 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.Dental Prosthesis Design: 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.Epoxy Resins: Polymeric resins derived from OXIRANES and characterized by strength and thermosetting properties. Epoxy resins are often used as dental materials.Tooth, Nonvital: A tooth from which the dental pulp has been removed or is necrotic. (Boucher, Clinical Dental Terminology, 4th ed)Aluminum Oxide: 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.Carbon Compounds, Inorganic: Inorganic compounds that contain carbon as an integral part of the molecule but are not derived from hydrocarbons.Hardness Tests: 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)Physicochemical Processes: Physical reactions involved in the formation of or changes in the structure of atoms and molecules and their interactions.Dental Porcelain: 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)Tooth, Artificial: A fabricated tooth substituting for a natural tooth in a prosthesis. It is usually made of porcelain or plastic.Tooth Bleaching Agents: Chemicals that are used to oxidize pigments in TEETH and thus effect whitening.Dental Leakage: The seepage of fluids, debris, and micro-organisms between the walls of a prepared dental cavity and the restoration.Ceramics: 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)Toothbrushing: The act of cleaning teeth with a brush to remove plaque and prevent tooth decay. (From Webster, 3d ed)Bicuspid: 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)Immersion: The placing of a body or a part thereof into a liquid.Stress, Mechanical: 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.Dental Restoration, Temporary: 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)Photoinitiators, Dental: 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.Dental Veneers: 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.Aluminum Silicates: 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)Dental Alloys: A mixture of metallic elements or compounds with other metallic or metalloid elements in varying proportions for use in restorative or prosthetic dentistry.Organically Modified Ceramics: Organic-inorganic hybrid polymers developed primarily for DENTAL RESTORATION. They typically contain a defined mixture of ORGANOSILICON COMPOUNDS; CERAMICS; and organic POLYMERS.Tooth Abrasion: 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)Barium Compounds: Inorganic compounds that contain barium as an integral part of the molecule.Analysis of Variance: A statistical technique that isolates and assesses the contributions of categorical independent variables to variation in the mean of a continuous dependent variable.Electron Probe Microanalysis: 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.Tooth Bleaching: 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.Dental Amalgam: An alloy used in restorative dentistry that contains mercury, silver, tin, copper, and possibly zinc.Stainless Steel: 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)Halogens: A family of nonmetallic, generally electronegative, elements that form group 17 (formerly group VIIa) of the periodic table.Diamond: 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)Water: 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)Adhesiveness: A property of the surface of an object that makes it stick to another surface.Dental Abutments: 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.Denture Repair: The process of reuniting or replacing broken or worn parts of a denture.Silicates: 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)Phase Transition: A change of a substance from one form or state to another.Adhesives: Substances that cause the adherence of two surfaces. They include glues (properly collagen-derived adhesives), mucilages, sticky pastes, gums, resins, or latex.Orthodontic Brackets: 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.Molar: 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)Tooth Preparation: Procedures carried out with regard to the teeth or tooth structures preparatory to specified dental therapeutic and surgical measures.Silicon Compounds: Inorganic compounds that contain silicon as an integral part of the molecule.Polycarboxylate Cement: 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.Tooth Root: 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: Quartz (SiO2). A glassy or crystalline form of silicon dioxide. Many colored varieties are semiprecious stones. (From Grant & Hackh's Chemical Dictionary, 5th ed)Tooth Preparation, Prosthodontic: 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)Methylmethacrylates: The methyl esters of methacrylic acid that polymerize easily and are used as tissue cements, dental materials, and absorbent for biological substances.Compressive Strength: The maximum compression a material can withstand without failure. (From McGraw-Hill Dictionary of Scientific and Technical Terms, 5th ed, p427)Anion Exchange Resins: High-molecular-weight insoluble polymers that contain functional cationic groups capable of undergoing exchange reactions with anions.Polymethyl Methacrylate: 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.Wettability: 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.Time Factors: Elements of limited time intervals, contributing to particular results or situations.Bite Force: The force applied by the masticatory muscles in dental occlusion.Hydrofluoric Acid: Hydrofluoric acid. A solution of hydrogen fluoride in water. It is a colorless fuming liquid which can cause painful burns.Denture, Partial: 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.Thermogravimetry: 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).Colorimetry: 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)Cariostatic Agents: Substances that inhibit or arrest DENTAL CARIES formation. (Boucher's Clinical Dental Terminology, 4th ed)Polymers: Compounds formed by the joining of smaller, usually repeating, units linked by covalent bonds. These compounds often form large macromolecules (e.g., BIOPOLYMERS; PLASTICS).Elastic Modulus: 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.Cation Exchange Resins: High molecular weight insoluble polymers which contain functional anionic groups that are capable of undergoing exchange reactions with cations.Polyethylene Glycols: 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.Light: That portion of the electromagnetic spectrum in the visible, ultraviolet, and infrared range.Tooth Cervix: 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)Dental Equipment: 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)Denture Bases: 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.Tooth Wear: Loss of the tooth substance by chemical or mechanical processesBrompheniramine: Histamine H1 antagonist used in treatment of allergies, rhinitis, and urticaria.Statistics, Nonparametric: 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: 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.Air Abrasion, Dental: 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.Drug Storage: The process of keeping pharmaceutical products in an appropriate location.Particle Size: Relating to the size of solids.Semiconductors: Materials that have a limited and usually variable electrical conductivity. They are particularly useful for the production of solid-state electronic devices.Photochemical Processes: Chemical reactions effected by light.Magnesium Oxide: 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.Incisor: 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)Elasticity: Resistance and recovery from distortion of shape.Methylmethacrylate: The methyl ester of methacrylic acid. It polymerizes easily to form POLYMETHYL METHACRYLATE. It is used as a bone cement.Tooth, Deciduous: The teeth of the first dentition, which are shed and replaced by the permanent teeth.Pseudoephedrine: A phenethylamine that is an isomer of EPHEDRINE which has less central nervous system effects and usage is mainly for respiratory tract decongestion.Astringents: Agents, usually topical, that cause the contraction of tissues for the control of bleeding or secretions.Dentistry, Operative: 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)Dental Prosthesis Repair: The process of reuniting or replacing a broken or worn dental prosthesis or its part.Metal Ceramic Alloys: 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.Temperature: 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.Esthetics, Dental: 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)Spectrometry, X-Ray Emission: 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.Zinc Oxide: A mild astringent and topical protectant with some antiseptic action. It is also used in bandages, pastes, ointments, dental cements, and as a sunblock.Dental High-Speed Equipment: Tools used in dentistry that operate at high rotation speeds.Absorption: The physical or physiological processes by which substances, tissue, cells, etc. take up or take in other substances or energy.Tooth Demineralization: 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.Titanium: 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)Fluorides: 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.Optical Phenomena: LIGHT, it's processes and properties, and the characteristics of materials interacting with it.Dental Caries: 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.Cuspid: 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)Dental Pulp Capping: 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.Coloring Agents: Chemicals and substances that impart color including soluble dyes and insoluble pigments. They are used in INKS; PAINTS; and as INDICATORS AND REAGENTS.Mouthwashes: Solutions for rinsing the mouth, possessing cleansing, germicidal, or palliative properties. (From Boucher's Clinical Dental Terminology, 4th ed)Potassium Compounds: Inorganic compounds that contain potassium as an integral part of the molecule.Photoelectron Spectroscopy: 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: Erbium. An element of the rare earth family of metals. It has the atomic symbol Er, atomic number 68, and atomic weight 167.26.Food Coloring Agents: Natural or synthetic dyes used as coloring agents in processed foods.Tooth Crown: 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)Cementation: 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.Finite Element Analysis: A computer based method of simulating or analyzing the behavior of structures or components.Spectroscopy, Fourier Transform Infrared: 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.Coffee: A beverage made from ground COFFEA beans (SEEDS) infused in hot water. It generally contains CAFFEINE and THEOPHYLLINE unless it is decaffeinated.Streptococcus oralis: 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.Space MaintenanceCalcium Compounds: Inorganic compounds that contain calcium as an integral part of the molecule.Rubber: 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.Viscosity: 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)Palladium: 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.Streptococcus sobrinus: 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.Aluminum Compounds: Inorganic compounds that contain aluminum as an integral part of the molecule.Random Allocation: 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.Root Canal Preparation: 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)Peroxides: 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)Dental Pulp: 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)Forensic Dentistry: The application of dental knowledge to questions of law.Dental Occlusion, Traumatic: An occlusion resulting in overstrain and injury to teeth, periodontal tissue, or other oral structures.Boron Compounds: Inorganic or organic compounds that contain boron as an integral part of the molecule.Denture Design: 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.Air Pressure: 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.Friction: Surface resistance to the relative motion of one body against the rubbing, sliding, rolling, or flowing of another with which it is in contact.Cattle: 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.Hot Temperature: Presence of warmth or heat or a temperature notably higher than an accustomed norm.Porosity: 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.Silicon: 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 Phosphates: Calcium salts of phosphoric acid. These compounds are frequently used as calcium supplements.Pit and Fissure Sealants: Agents used to occlude dental enamel pits and fissures in the prevention of dental caries.Glutaral: 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.Methylcellulose: 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.Terpenes: A class of compounds composed of repeating 5-carbon units of HEMITERPENES.Nanoparticles: 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.Benzoyl Peroxide: 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.Powders: 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)Biocompatible Materials: 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, ...
Solitaire composite resin: a condensable composite resin that can be placed 67% faster than conventional hybrid composite resins & produces superior interproximal contacts
Find Laminating Adhesives and Composite Resins on GlobalSpec by specifications. Laminating adhesives and composite resins are cured using heat and/or heat and pressure.
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.
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 ...
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
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 - clinicaltrials.gov Evaluation of a new resin-based composite material. Amalgam and composite are the most commonly used restorative materials ...
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 ...
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.
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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
... By Vesna Miletic English | PDF | 2017 (2018 Edition) | 310 Pages | ISBN : 3319609602 | 21 MB http://mir.cr/P
The aim of this in-vitro study was to investigate the influence of fillers in resin composites on the initial bacterial adhesion. For this investigation the strains of S. mutans and S. sanguinis ere used. Additionally, the influence of a pellicle, the inhibitor BHT and silane-treatment of the filler on the bacterial adhesion were examined. The adhesion of the two strains S. mutans and S. sanguinis was also compared. The 13 tested materials were experimental composites, based on the same monomer matrix. One of the composites was without fillers (Grundmasse). The other twelve composites showed a filler-weight fraction of 30%. Two different materials of fillers were used (SiO2, Ba-Al-B-Silikat) with different specific surfaces (0,6 to 150 m2/g). Two materials (K6 0% BHT, K6 1% BHT) differed in silane-treatment of the fillers (silane-treated or not silane-treated). For six composites (Ox 50, R709, DT4, GK 0,7 UF silane-treated, K6 silane-treated, K6 not silane-treated) there was a difference in the ...
The new prices will be effective beginning Sept. 1, 2012, or as contracts allow. The company attributed the price increase to continued escalation in costs for key raw materials and production of these products. Responding to these changing market conditions allows Ashland to continue investing in the support and growth of the market and our customers. More information:www.ashland.com
The present disclosure is directed to embodiments of composite tubing having properties tailored to meet a wide variety of environmental and working conditions. Composite tubes disclosed herein may include one or more of the following layers: a internal liner, a composite layer, a thermal insulation layer, a crush resistant layer, a permeation barrier, buoyancy control layer, a pressure barrier layer, and a wear resistant layer. Grooves may be provided in one or more layers of the composite tube to provide increased axial permeability to the composite tube. A venting system, including vent paths, may be provided in the composite tube to vent fluid that may become trapped within the wall of the composite tube.
Increasing demand for wood-plastic composites in the manufacture of building & construction products is estimated to boost the overall wood-plastic composites market over the next few years. Additionally, rising demand for wood-plastic composites to manufacture several interior components of automobiles is projected to fuel market growth. Wood-plastic composites help in reduction of the overall weight of the vehicle and in turn enhance its fuel efficiency. Furthermore, implementation of stringent environmental regulations restricting the use of 100% plastic or wood is expected to boost the demand for global wood-plastic composites. However, the development of other natural fiber composites such as straw fiber, fruit fiber, leaf fiber and seed fiber is likely to hamper the overall growth of wood-plastic composites market in the near future. ...
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Video articles in JoVE about acrylic resins include Acrylic Resin Molding Based Head Fixation Technique in Rodents, Nano-fEM: Protein Localization Using Photo-activated Localization Microscopy and Electron Microscopy, Application of Light-cured Dental Adhesive Resin for Mounting Electrodes or Microdialysis Probes in Chronic Experiments.
It has been a constant challange for clinicians to integrate completely different materials such as the tooth tissue and composite. With composite resins m...
Ultradent Products, Inc. ("Ultradent") warrants that this product shall, for a period of 5 years from the date of purchase, when operated according to the operating instructions included with the product, (i) conform in all material respects to the specifications set forth in Ultradents documentation accompanying the product; and (ii) be free from defects in material and workmanship. This limited warranty is nontransferable and applies solely to the original purchaser and does not extend to subsequent owners of the product. This limited warranty does not cover any accessory components such as, but not limited to, batteries, chargers, adapters, or adaptive lenses. This limited warranty is void if the product is damaged due to negligence, abuse, misuse, accident, modification, tampering, alteration, or failure to follow the applicable instructions for use. To qualify under this limited warranty, proof of purchase (e.g., sales receipt or similar documention) must be submitted to Ultradent along ...
Neda Rajamand Ekberg is responsible for clinical studies of different composite of meals (fat, carbohydrate, protein, fibres) on the effect on metabolism and inflammatory markers in patients with diabetes and in controls. She is also responsible for clinical studies on the effect of PPAR³ agonists on metabolic control. Research group Growth and metabolism. Selected publications. Analyte flux at a biomaterial-tissue interface over time: implications for sensors for type 1 and 2 diabetes mellitus. ...
Dr. Vistasp Karbhari, a professor of structural engineering at UC San Diego, has quadrupled the strength of dental composites, thanks to a material similar
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|p|Tetric EvoFlow Bulk Fill is a flowable, light-curing radiopaque composite for direct restorations in posterior teeth. As its opacity increases during polymerization, Tetric EvoFlow Bulk Fill is also suitable for discoloured tooth structure. It is appli
Composite resin provides a seamless fix to filling a cavity and blends in perfectly with the color of your natural enamel, so that no one will know its there.
Blok, L. G., Yu, H., Longana, M. L. & Woods, B. K. S., 1 Jan 2020, ECCM 2018 - 18th European Conference on Composite Materials. Applied Mechanics Laboratory, (ECCM 2018 - 18th European Conference on Composite Materials).. Research output: Chapter in Book/Report/Conference proceeding › Conference contribution ...
manhole cover composite product listings on SeekPart.com - Choose quality manhole cover composite products from large database of manhole cover composite manufacturers and suppliers at SeekPart.com.
The 2nd edition includes an expanded treatment of each topic, particularly in relation to applications and practical considerations. Provides a comprehensive treatment of functional composite materials, covering functions related to the thermal, electrical, electromagnetic, thermoelectric, dielectric, optical, magnetic and electrochemical behaviour.
Alibaba.com offers 137 raw material of alkyd resin products. About 37% of these are alcohol & hydroxybenzene & ether, 10% are building coating, and 3% are reactors. A wide variety of raw material of alkyd resin options are available to you, such as industrial grade, reagent grade, and agriculture grade.
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/PRNewswire/ -- The Global Advanced Composite Materials Market - Segmented by Fiber Type, End-user Industry, and Geography - Growth, Trends, and Forecast...
View Advanced Composite Materials UK Limited 06658614 company information, directors, industry, description and more at Company Database UK.
Material testing of composites is done to enhance strength and stiffness of a material with lighter weight. We offer a wide range of Composites Testing Instruments across the globe.
Their Velox2 bicycle did not contain an engine and was solely powered by human efforts. Both for reaching such elevated speeds as well as in protecting the drivers inside, the design of the bicycle clearly made the difference.The team partnered with DSM for the development of the Velox2 bicycle, taking full advantage of the material and design expertise of DSM Composite Resins to make a light weight composite construction and optimize the shape for superior aerodynamics.
While Dr. Carrington prefers indirect, lab-made veneers to composite resin placed chairside, she understands that patients are unique. The doctor will walk you through the pros and cons of each option to arrive at the best approach for your needs, budget, lifestyle, and goals ...
A generalized application coordination module coordinates execution of two or more general-purpose applications. Native display elements of the applications may be arranged in a composite application interface. Inputs and/or events pertaining to the composite application may be directed to respective applications. Operations to configure the application(s) of a composite application may be recorded and/or replayed as macro scripts, which may be triggered by specified workflow actions.
Alibaba.com offers 32 composites sea kayaks products. About 53% of these are canoe/kayak, 6% are rowing boats, and 3% are other sports & entertainment products. A wide variety of composites sea kayaks options are available to you, such as 2, 1, and 3.
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Ageing of Composites (ebook), ISBN 9781845694937. Ageing of composites is a highly topical subject given the increasing use of composites in structural...
Zwick testing systems are used to determine material characteristics of composites in specific directions, such as stiffness and strength for lightweight composites materials.
Items returned within 30 days of purchase with a return authorization number on the outside and inside of the return box will be credited 100%. Product returned between 31 and 60 days from purchase date is subject to a 20% restocking fee. Ultradent will not accept returns after 60 days, with the exception of machines under warranty. Errors in shipment must be reported within 14 days of invoice date. All return authorization numbers become invalid 90 days after date of issue. A return authorization number must accompany all returns to receive proper credit. Please contact Customer Service at 800.552.5512 for assistance. ...
Inorganic, radioisotopic and organic analysis of 241-AP-101 tank waste. SciTech Connect. SK Fiskum; PR Bredt; JA Campbell; LR Greenwood; OT Farmer; GJ Lumetta; GM Mong; RT Ratner; CZ Soderquist; RG Swoboda; MW Urie; JJ Wagner. 2000-06-28. Battelle received five samples from Hanford waste tank 241-AP-101, taken at five different depths within the tank. No visible solids or organic layer were observed in the individual samples. Individual sample densities were measured, then the five samples were mixed together to provide a single composite. The composite was homogenized and representative sub-samples taken for inorganic, radioisotopic, and organic analysis. All analyses were performed on triplicate sub-samples of the composite material. The sample composite did not contain visible solids or an organic layer. A subsample held at 10 C for seven days formed no visible solids. The characterization of the 241-AP-101 composite samples included: (1) Inductively-coupled plasma spectrometry for Ag, Al, ...
DYNAPOL® P 1500 is a saturated, high molecular, semi-crystallin, linear co-polyester resin. It is recommended for thermoplastic applications.
This Tooling U-SME online Composites Training course teaches operators how to protect themselves from illness and injury when working with composites
The thermoelectric performa nce of flexible thermoelectric ge nerator stri pes was i nvestigated i n terms of differe nt material combi natio ns. The thermoelectric ge nerators were co nstructed usi n
Can anyone give us some sectioning advice? We are using Spurrs resin to cut ~3 micron sections of Arabidopsis shoot apices. We like the quality of the sections, however we have trouble getting the sections to stick to glass slides, (they tend to fall off the slides when we stain or mount the slide). Unfortuneately, when we have tried to coat the slides (we have tried agar and vectabond so far) the sections do not lay down flat. One solution we are contemplating is to cut 1 micron sections, however if anyone has other suggestions we would appreciate it. Thank-you, Susan Varnum ...
The versatile universal composite with unsurpassed esthetics and outstanding strength for every restoration - anterior or posterior.
The versatile universal composite with unsurpassed esthetics and outstanding strength for every restoration - anterior or posterior.
Hi There! Just wondering if anyone can help. Just seeking independent random advice :) Ive got a molar with a large composite filling... done...
Page contains details about composite CNC-latex film . It has composition images, properties, Characterization methods, synthesis, applications and reference articles : nano.nature.com
Page contains details about nitrobenzene-loaded IC60BA/P3HT composite . It has composition images, properties, Characterization methods, synthesis, applications and reference articles : nano.nature.com
Desc: To provide details of a tour by code, name of the tour provider, length, number of stops, room occupancy and number of rooms. 010 7135 Product identifier C an..35 020 3036 Party name C an..70 030 6168 Length measure C n..15 040 8216 Journey stops quantity C n..3 050 2160 Days of week set identifier C an..7 060 6350 Units quantity C n..15 070 6060 Quantity C an..35 Composite E993 is used in the following Segments: ATI ...
well....sort of. It has a composite downtube protector consisting of alternating layers of kevlar and carbon fiber, with an outer Sorbothane energy
Desc: Code and or name identifying size and type of equipment. Code preferred. 010 8155 Equipment size and type description code C an..10 020 1131 Code list identification code C an..17 030 3055 Code list responsible agency code C an..3 040 8154 Equipment size and type description C an..35 Composite C224 is used in the following Segments: EQD ...
KWin, KDEs window manager, has been around since KDE 2.0 (replacing KWM in KDE 1.x) and has grown to be a mature and stable window manager over the years. For KDE 4, however, there were a few people rumbling about visual effects, and perhaps KWin was feeling a little envious of its younger cousins Compiz and Beryl. While these new effects have created a lot of buzz around Linux and UNIX, long-term KDE users have wished they can enjoy the effects of Compiz/Beryl while still having the tried and tested window manager that is KWin. As a result, for KDE 4, KWin has received a huge graphical upgrade, with composite and GL support. Read on for more details.
KWin, KDEs window manager, has been around since KDE 2.0 (replacing KWM in KDE 1.x) and has grown to be a mature and stable window manager over the years. For KDE 4, however, there were a few people rumbling about visual effects, and perhaps KWin was feeling a little envious of its younger cousins Compiz and Beryl. While these new effects have created a lot of buzz around Linux and UNIX, long-term KDE users have wished they can enjoy the effects of Compiz/Beryl while still having the tried and tested window manager that is KWin. As a result, for KDE 4, KWin has received a huge graphical upgrade, with composite and GL support. Read on for more details.
Our contractor recommended and installed Timbertech composite lumber when we built a large deck three years ago. After the first few rains, we began to ...
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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 ...
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. ...
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 ...
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. Wood is a natural composite of cellulose fibres in a matrix of lignin. 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 ...
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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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
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 : http://www.taubdental.com/index.cfm?Body=product& ...
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As with other composite materials, a dental composite typically consists of a resin-based matrix, which contains a modified ... Composite resin fillings and inlays. An 11-year evaluation.; U Pallesen, V Qvist; (2003) Clin Oral Invest 7:71-79 doi:10.1007/ ... It is more forgiving of preparation and technique than composite resins used for that purpose. High copper dental amalgam is ... The filler particles give the composites wear resistance as well. Compositions vary widely, with proprietary mixes of resins ...
a b c d Rasines Alcaraz MG, Veitz-Keenan A, Sahrmann P, Schmidlin PR, Davis D, Iheozor-Ejiofor Z. Direct composite resin ... Resin composite, glass ionomer cements and ceramic or gold inlays can be used as alternatives to amalgam. ... Burgess, JO; Walker, R; Davidson, JM (2002). "Posterior resin-based composite: review of the literature". Journal of Pediatric ... These are some of the reasons why amalgam has remained a superior restorative material over resin-base composites. The New ...
Resin composite - bond strength between enamel and resin based fillings become weakened. ... Bonding, which also masks tooth stains, is when a thin coating of composite material is applied to the front of a person's ... A power bleaching treatment typically involves isolation of soft tissue with a resin-based, light-curable barrier, application ... However, it can slightly affect restorations made with composite materials, cements and dental amalgams. Tooth whitening will ...
Possible treatments to correct angularis nigra include addition of composite resin in the space, veneer placement, or gum graft ... Lenhard, M (2008). "Closing diastemas with resin composite restorations". The European journal of esthetic dentistry. 3 (3): ...
CNSL may be used as a resin for carbon composite products. CNSL-based Novolac is another versatile industrial monomer ... Cashew nutshell liquid (CNSL) or cashew shell oil (CAS registry number 8007-24-7) is a natural resin with a yellowish sheen ... The seed is surrounded by a double shell containing an allergenic phenolic resin, anacardic acid, a potent skin irritant ... Anacardic acid is also used in the chemical industry for the production of cardanol, which is used for resins, coatings, and ...
It makes synthetic resins and composite materials. Since 1951 it has expanded and is now international, employing around 600 ...
"Journal of Composite Materials. 35 (18): 1605-1633. Bibcode:2001JCoMa..35.1605L. doi:10.1106/YRBH-JGT9-U6PT-L555.. ... Resin is used to coat the fibers, sealing them together to form a sheet of Spectra cloth. Two sheets of cloth are then placed ... Graphene composite. In late 2014, researchers began studying and testing graphene as a material for use in body armor. ... A composite-foam and hard-rubber test backing was developed as an alternative to address these issues. The drop test method was ...
ChemicaInvest consists of three business units; Aliancys (composite resins), AnQore (acrylonitrile) and Fibrant (caprolactam). ... DSM Dyneema is the inventor, manufacturer and marketer of Dyneema®. DSM Resins & Functional Materials manufacture resins ... The Materials cluster is made up of DSM Engineering Plastics, DSM Dyneema and DSM Resins & Functional Materials. DSM ... 2005: NeoResins (water-based coating resins). 2011: Martek (nutritional products derived from microalgae and fermentation ...
The circuitboard substrates are usually dielectric composite materials. The composites contain a matrix (usually an epoxy resin ... At the glass transition temperature the resin in the composite softens and significantly increases thermal expansion; exceeding ... The cloth or fiber material used, resin material, and the cloth to resin ratio determine the laminate's type designation (FR-4 ... Wiley Encyclopedia of Composites. 1-11.. *^ By Lee W. Ritchey, Speeding Edge (November 1999). "A SURVEY AND TUTORIAL OF ...
"Bio-Composites Update: Bio-Based Resins Begin to Grow". Composites World (April). 2008. Retrieved 2008-11-25. Dawe, Bob; ... acid catalyzed ring opening of soy fatty acid methyl esters with multifunctional polyols to form new polyols for casting resins ...
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 (which mimic female sex hormones)[citation ... Stein, PS; Sullivan, J; Haubenreich, JE; Osborne, PB (2005). "Composite resin in medicine and dentistry". Journal of long-term ...
Boats are built by draping the cloth on a mold, then impregnating it with a liquid resin. A gel coat on the outside gives a ... Fiber reinforced composites: Fiberglass is the most common material used in manufacturing canoes. Fiberglass is not ... Most modern canoes are made of molded plastic or composites such as fiberglass. Until the mid-1800s the canoe was an important ... Plastic: Royalex is a composite material, comprising an outer layer of vinyl and hard acrylonitrile butadiene styrene plastic ( ...
Kakati, B. K.; Deka, D. (2007). "Effect of resin matrix precursor on the properties of graphite composite bipolar plate for PEM ... C-C composite, carbon-polymer composites etc. The membrane electrode assembly (MEA) is referred as the heart of the PEMFC ... "Differences in physico-mechanical behaviors of resol and novolac type phenolic resin based composite bipolar plate for proton ... Kakati, B. K.; Mohan, V. (2008). "Development of low cost advanced composite bipolar plate for P.E.M. fuel cell". Fuel Cells. ...
Carbon fibre is mostly used in composite materials, together with resin, such as carbon fibre reinforced plastic. The fibres ... This method is mostly used for composite materials; spread tow fabrics can be made in carbon, aramide, etc. ... Glass fibre is used in the production of ironing board and mattress covers, ropes and cables, reinforcement fibre for composite ... textiles are also used to provide strengthening in composite materials such as fibreglass and industrial geotextiles. Textiles ...
Resin-bonded diamond tools: The tools' bonding material is mainly resin powder. An example of this tool is the resin-bonded ... Woodworking: Composite laminate flooring is widely used. It is wearable as stone. PCD circular saw blades, profiling cutter, ... Resin-bonded diamond polishing pads are used to polish stone. Construction: Medium or small sized diamond saw blades, diamond ... Polycrystalline Diamond Composite or Compacts (PDC): They are made by combining some layers of polycrystalline diamonds (PCD) ...
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 ... "Effect of salivary esterase on the integrity and fracture toughness of the dentin-resin interface". Journal of Biomedical ...
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. ...
Resin composite - bond strength between enamel and resin based fillings become weakened. Many studies have found that 10-16 ... leads to an increase in the surface roughness and porosity of composite resins. However, the saliva may exert a protective ... This suggests that tooth whitening negatively impacts composite resin restorations. Glass ionomer and other cements - ... Bonding, which also masks tooth stains, is when a thin coating of composite material is applied to the front of a person's ...
The fuselage is carbon and glass fiber composite with epoxy resin. The wings have an elliptical planform, vertical or ...
However, this difference has decreased with continual development of composite resins. Amalgam is typically compared to resin- ... Amalgam possesses greater longevity when compared to other direct restorative materials, such as composite. ... based composites because many applications are similar and many physical properties and costs are comparable. Mercury has been ...
The fuselage is carbon and glass fiber composite with epoxy resin. The wingspan is 12 meters without winglets. The flaperons ...
Replacement versus repair of defective restorations in adults: resin composite PMID 24510679 https://doi.org/10.1002/14651858. ... Antibacterial agents in composite restorations for the prevention of dental caries PMID 24343855 https://doi.org/10.1002/ ...
... is trademark of Amroy Europe Oy for carbon nanoepoxy resins. It is a family of composite resins reinforced with ... CNTs can then chemically react with epoxy resin or other material forming strong covalent bonds. This results in a more durable ... "Surfboard uses nano-carbon/epoxy resin system". Reinforced plastics. 4 June 2009. Archived from the original on 17 February ... hybrid composite structure that is between 20 and 30% stronger (with only 0.5% CNT contents) than a conventional reinforced ...
... is a composite material used in fine arts, crafts, and construction. It consists of a gypsum-based material in an ... It is considered an attractive alternative to other resin-based materials, such as polyester and fiberglass. It can be used for ... The finished composite emits no toxic fumes. The mixing process requires no harmful solvents. However, the mixing should be ... acrylic resin. Jesmonite is a versatile material and is used in several ways. It is typically used for creating sculptures and ...
RCC is a laminated composite material made from graphite rayon cloth and impregnated with a phenolic resin. After curing at ... Aluminum, titanium, composite materials Aircraft jet engines Synthetic diamond early uses (drill bits, jewelry) Silicon ... Mathews, F.L. & Rawlings, R.D. (1999). Composite Materials: Engineering and Science. Boca Raton: CRC Press. ISBN 978-0-8493- ... Composite materials mostly Wide range, e.g., self health monitoring, self healing material, morphing, ... ...
DSM Composite Resins AG (Schaffhausen, Switzerland) is expanding the annual production capacity of its gel coats and resin ... DSM Composite Resins AG (Schaffhausen, Switzerland) is expanding the annual production capacity of its gel coats and resin ... The plant is owned by Jinling DSM Resins Co. Ltd. (JDR), which is a joint venture between DSM and its Chinese partner, Sinopec ...
Dental veneers which are also known as porcelain veneers are thin, custom-built shells of tooth-colored materials used to cover the front surface of teeth with the objective of enhancing a person s look. These veneers are attached to the front of the teet... Read , ...
Polybutylene terephthalate (PBT) Composites. - Polyamide (PA) Composites. - Others. Automotive thermoplastic resin composites ... Automotive thermoplastic resin composites market by Resin Type (Value ($M) and Volume (M lbs) from 2011 to 2022):. - ... resin type, by country and by region as follows:. Automotive thermoplastic resin composites market by Application Type (Value ... Automotive thermoplastic resin composites market by Material Type (Value ($M) and Volume (M lbs) from 2011 to 2022):. - Glass ...
... the dental composition of the present invention can be used advantageously as a dental composite resin. This composite resin ... dental composite resins such as dental composite filling materials, dental crown materials, and luting materials, dental ... A composite resin comprising the dental composition according to claim 1. 16. The dental composition according to claim 11, ... The present invention also provides a composite resin using the dental composition of the present invention. ...
... Jiaoxia Zhang,1 Yaping Zheng,2 Haijun Zhou,1 Jing ... When MWNTs content of the composites is 1 wt%, as compared to neat resin, the flexural strength increases from 143 Mpa to 156 ... Epoxy resin 830 (epoxy number of 0.56-0.61 eq/100 g) was produced by Wuxi Diaisheng epoxy resin CO., LTD. Aromatic hardener ( ... The MWNTSOH was added to the epoxy resin at 80°C in order to lower the viscosity of the epoxy resin. Filler weight fractions ...
The purpose of this research was to develop a reinforcing material for polyethylene-based composite manufacture by rotational ... Influence of surface treatment on hybrid wollastonite-polyethylene composite resins for rotational moulding. ... 1.Department of Mechanical EngineeringCentre for Advanced Composite Materials, University of AucklandAucklandNew Zealand ... 2.Department of ChemistryCentre for Advanced Composite Materials, University of AucklandAucklandNew Zealand ...
... composites are coated with sizings, binders, and/or finishes that serve multiple purposes, including facilitating handling, ... Fibres used in preforms of resin transfer moulded (RTM) ... the behaviour of a thermosetting resin based composite is ... Fibres used in preforms of resin transfer moulded (RTM) composites are coated with sizings, binders, and/or finishes that serve ... Sizing related kinetic and flow considerations in the resin infusion of composites. ...
Laminating adhesives and composite resins are cured using heat and/or heat and pressure. ... Find Laminating Adhesives and Composite Resins on GlobalSpec by specifications. ... epoxy resins are used as casting resins, potting agents, resin binders or laminating resins in fiberglass or composite ... Composites Composite materials consist of a resin (suitable for molding) and a matrix (typically fibers or textile material) ...
... and Composite Resins with formation of ChemicaInvest B.V.. ... and Composite Resins with formation of ChemicaInvest B.V.. ... ChemicaInvest operates as an independent company with three business units: caprolactam, acrylonitrile and composite resins. ... and Composite Resins through the formation of a new company, ChemicaInvest B.V., has been finalized. The partnership was ... acrylonitrile business and composite resins business including its 75% stake in JDR (China). DSMs 65% stake in the service ...
Such resin compounds are useful for obtaining thick coatings, MEMS parts and bulk ceramics, which are difficult to obtain by ... Applications of the resins for binding agents, as starting materials for porous ceramics, matrix sources with impregnation, ... The recent development of the process of filler or cross-linking agent additions to resin compounds is also introduced. ... This article reviews the applications of silicone resins as ceramic precursors. The historical background of silicone synthesis ...
... Nour F. Attia1 and ... "Nanoparticles Decorated on Resin Particles and Their Flame Retardancy Behavior for Polymer Composites," Journal of ...
Restoring Nonvital Premolars with Composite Resin Onlays: Effect of Different Fiber-reinforced Composite Layers on Marginal ... testing the hypotheses that direct resin composites produce higher Ïƒf and H values than indirect composites and that these ... Composite resins in the 21st century. Willems, G.; Lambrechts, P.; Braem, M.; Vanherle, G. // Quintessence International; ... Human enamel and dent in should be used as the physiologic standards with which to compare composite resins, especially in the ...
... Vendor Analysis (SABIC, Lonza, Huntsman Corporation, Hexcel ... Competitive Analysis: Global High Temperature Composite Resin Market. The global high temperature composite resin market is ... global-high-temperature-composite-resin-market. Customize report of "Global High Temperature Composite Resin Market" as per ... Global High Temperature Composite Resin Market is segmented on the basis of • Resin Type • Manufacturing Process • End Use ...
... of composite increment, distance from the light source tip to the composite resin and others (10,17). ... A composite resin may be considered well cured when the hardness of the opposing surface is equivalent to at least 80-90% of ... Influence of shade and irradiation time on the hardness of composite resins ... Effect of light intensity and exposure duration on cure of resin composite. Oper Dent 1994;19:26-32. [ Links ]. 2. Barnett F. ...
Categories: Restorative/Cosmetic Instruments & Materials : Composite Universal : VersaLite® Light-Activated Hybrid Composite ...
Amalgam and composite are the most commonly used restorative materials ... ... clinicaltrials.gov Evaluation of a new resin-based composite material. ... Should my composite restorations last forever? Why are they failing?. Composites resins have become the first choice for direct ... Evaluation of a new resin-based composite material.. Amalgam and composite are the most commonly used restorative materials in ...
Polyester and vinyl ester resins serve as the bonding agent that holds reinforcements together. Benefits include low cost, easy ... Polyester and vinyl ester resins are the most commonly used matrix resins to create composite parts.. Polyester resins, also ... Polynt Composites USA Inc.. A world leader in the production and distribution of gel coats, composites resins and industrial ... INEOS Composites. The global leader in unsaturated polyester resins, vinyl ester resins and gelcoats. ...
"Microleakage of class I and II composite resin restorations using a sonic-resin placement system," Operative Dentistry, 2015. ... conventional resin based composites," Clinical Oral Investigations, vol. 18, no. 8, pp. 1991-2000, 2014. View at Publisher · ... E. Asmussen and A. Peutzfeldt, "Direction of shrinkage of light-curing resin composites," Acta Odontologica Scandinavica, vol. ... C. E. Campodonico, D. Tantbirojn, P. S. Olin, and A. Versluis, "Cuspal deflection and depth of cure in resin-based composite ...
... polyester resins, and phenolic resins while metallic matrices include aluminium resin, magnesium resin, and titanium resin [3 ... untreated sisal fibre-epoxy resin reinforced composite. (b) 5 wt.% treated sisal fibre-epoxy resin reinforced composite. (c) 10 ... untreated sisal fibre-epoxy resin reinforced composite. (d) 10 wt.% treated sisal fibre-epoxy resin reinforced composite. (e) ... untreated sisal fibre-epoxy resin reinforced composite. (f) 15 wt.% treated sisal fibre-epoxy resin reinforced composite. (g) ...
... said resin composite being mainly composed of a prepolymer having α,β unsaturated double bonds at terminals and a molecular ... Novel resin composite for paint to be used for painting the surfaces of steel plates and other plates therewith, which is non- ... xylene resin, hydrocarbon resin, oil-modified alkyd resin, maleic polymer resin, polyamide resin, cumarone resin ... a novel resin composite which is clearly distinguished from any conventional resins by the fact that the resin composite of the ...
resin composite had a lower bond strength than the Filtek Z350 XT (. ) and Filtek Z350 XT Flow (. ) resin composites (. ). ... the bond strength values of the different resin composites photoactivated by LED showed that the X-tra fil resin composite had ... Classification of the modes of failure for the three composite restorations with different filler amounts and resin composites ... and conventional resin composites).. 5. Conclusions. Based on the results of this study, the X-tra fil composite restoration ...
The content introduces KURATTICE ECO, a product made from the monolithic molding of aluminum material and wood powder resin to ... This is a page relating to the wood powder resin/aluminum composite - KURATTICE ECO. ... The resin surface and aluminum core are bonded firmly together via an adhesive layer. This means there is no need to worry ... The resin surface is bonded firmly with the aluminum core. It firmly adheres to the aluminum core in high-temperature-variation ...
Encapsulated Resin for Non-Autoclave Resin Film Infusion Composites Repair. Printer-friendly version ... In phase 1 at the direction of the Air Force customer, we have focused on repair with BMI resin, 5250-4 from Cytec to be ... We have developed a form of the base resin that preliminary data shows will not advance when stored at room temperature for one ... Given the importance of composite repair to new aircraft like the F/A-22 and F-35 this SBIR research will provide significant ...
Dental Composite AFM Initial Ra (nm) AFM Final Ra (nm) Profilometry Initial Ra (nm) Profilometry Final Ra (nm) ... 87 Evaluation of Streptococcus Mutans on Dental Composite Resins Thursday, March 22, 2012: 8 a.m. - 9:30 a.m. ... Surface roughness analysis showed that all composite surfaces increased in Ra indicating biofilm-driven degradation. ... Methods: Composite discs were formed in Teflon molds and light-activated according to the manufacturers recommended procedures ...
Method of producing a composite foamed resin torso and head section of a human summary for medical training purposes. US ... A known method of producing such skin-like hull is to apply a resin onto a (living) human body and letting the resin set. Then ... Method of producing a composite foamed resin torso and head section of a human summary for medical training purposes. ... After the hardening or setting, respectively, of this applied resin two half shells 5, 6 are obtained such as shown in FIG. 2. ...
Catalyzed Polyester resinShrinkagePolyester resinsLight curedPhenolic resinsAdhesivesConventionalPosteriorPolymersFILLERParticlesPolymerizationTeethDentistryHybrid Composite ResinFiberAbstractPolyurethaneTemperatureAcrylicRestorationMethodsReinforcementCavityMatrix resinVeneersCompoundsAdhesiveLiquid resinFlowable CompositeToothRoughnessFillingsNano-hybrid resin compositeMelamine resinFlexuralDental compositeCementChemicallyPolyacid-modified resin
- The presently available composites have improved, but shrinkage of the composite during the curing procedure is still a clinical problem. (bioportfolio.com)
- A new composite restorative material has among other advantages demonstrated lower shrinkage in laboratory studies, due to a new formulation of the material. (bioportfolio.com)
- To reduce the risk of caries a new composite material Filtek Silorane® with reduced polymerization shrinkage has been developed. (bioportfolio.com)
- J. Park, J. Chang, J. Ferracane, and I. B. Lee, "How should composite be layered to reduce shrinkage stress: incremental or bulk filling? (hindawi.com)
- Thus, in light-cured composites, a rapid conversion induces a correspondingly rapid increase in composite stiffness, causing high shrinkage stresses at the restoration-tooth interface. (hindawi.com)
- Reducing the amount of polymerization shrinkage is an important issue in the development of dental resin composites. (hindawi.com)
- During setting of the resin composites, polymerization shrinkage induces contraction stress [ 6 , 16 ]. (hindawi.com)
- however, they still have some drawbacks, including polymerization shrinkage, potential failure at resin-dentin interfaces leading to secondary caries, and relatively high coefficient of thermal expansion. (umich.edu)
- However, one of the main problems with resin composites, its polymerization shrinkage, has not been solved yet. (dissertations.se)
- This thesis evaluates different restorative and light-curing techniques that are proposed to reduce the polymerization shrinkage and also the effect of new lightcuring units, light-emitting diodes (LED) and high-power quartz tungsten halogen (QTH) light on curing depth and degree of conversion of resin composites. (dissertations.se)
- Kamalak H, Kamalak A. Evaluation of polymerization shrinkage of dental composites by micro-computed tomography. (zyris.com)
- Degree of conversion and polymerization shrinkage of bulk-fill resin-based composites. (zyris.com)
- The inherent polymerization shrinkage of composites can produce gap formation between tooth/restoration 5 . (scielo.br)
- Below the CEJ, the bond with dentin is weaker: The polymerization shrinkage can result in gap formation between composite resin and the cavity walls. (leica-microsystems.com)
- One drawback is that the polymerization shrinkage and induced stresses during the curing procedure is an inherent property of resin composite materials that might impair their performance. (pubmedcentralcanada.ca)
- This review focuses on the significant developments of laboratory tools in the measurement of polymerization shrinkage and stresses of dental resin-based materials during polymerization. (pubmedcentralcanada.ca)
- Only studies that performed laboratory methods to evaluate the amount of the polymerization shrinkage and/or stresses of dental resin-based materials during polymerization were selected. (pubmedcentralcanada.ca)
- The search for an ideal and standard apparatus for measuring shrinkage stress and volumetric polymerization shrinkage of resin-based materials in dentistry is still required. (pubmedcentralcanada.ca)
- OBJECTIVE To investigate the subsurface degree of conversion (DC) and shrinkage force formation of low-viscosity (flowable) bulk-fill composite materials. (uzh.ch)
- The conventional flowable composite EX generated the significantly highest shrinkage forces (40.7±0.7 N) and reached a significantly higher DC (74.4±1.3%) compared to SDR and XB at 1.5-mm depth. (uzh.ch)
- CONCLUSION The tested low-viscosity bulk-fill materials show lower shrinkage force formation than a conventional flowable resin composite at high levels of degree of conversion up to 4-mm incremental thickness. (uzh.ch)
- OBJECTIVES To investigate the influence of pre-heating of high-viscosity bulk-fill composite materials on their degree of conversion and shrinkage force formation. (uzh.ch)
- For each of the test materials, pre-heated composite generated significantly lower shrinkage forces than room-temperature composite. (uzh.ch)
- CONCLUSIONS Both the composite material and the pre-cure temperature affect shrinkage force formation. (uzh.ch)
- Pre-heating of bulk-fill and conventional restorative composites prior to photoactivation decreases polymerization-induced shrinkage forces without compromising the degree of conversion. (uzh.ch)
- CLINICAL SIGNIFICANCE Composite pre-heating significantly reduces shrinkage force formation of high-viscosity bulk-fill and conventional resin composites, while maintaining or increasing the degree of monomer conversion, dependent upon the specific composite material used. (uzh.ch)
- Linear polymerization shrinkage of the composites was measured every 10 seconds from the start of mixing or irradiation to 90 minutes by the mercury bath medhod. (nii.ac.jp)
- Amongst these, epoxy resins, which are provided with outstanding characteristics such as high heat resistance, high elastic modulus, low shrinkage on curing and high chemical resistance, are most often employed. (justia.com)
- Today's composite resins have low polymerization shrinkage and low coefficients of thermal shrinkage, which allows them to be placed in bulk while maintaining good adaptation to cavity walls. (wikipedia.org)
- It is a general rule that the lower the reactive portion, the lower the shrinkage of the resin is during polymerization. (wikipedia.org)
- Examples of polymer matrices include epoxy resins, polyester resins, and phenolic resins while metallic matrices include aluminium resin, magnesium resin, and titanium resin [ 3 ]. (hindawi.com)
- Polyester resins , also known as Unsaturated Polyester Resins (UPR), combined with fiberglass reinforcements have been the building blocks of the composites industry for decades. (compositesone.com)
- Unsaturated polyester resins are the workhorse of the composites industry. (amtcomposites.co.za)
- A large category of resins, which constitutes 75% of resins used, is the unsaturated polyester resins. (wikipedia.org)
- It is then used to cross-link with alkyd, epoxy, acrylic, and polyester resins, used in surface coatings. (wikipedia.org)
- The first ancestor of modern polyester resins is Cyanamid's resin of 1942. (wikipedia.org)
- Most widely known for their flagship product, Polijel high performance gelcoat series, the company also manufactures UPE-polyester resins, vinyl ester resins, pigment color pastes, solid surface chips, adhesives, bonding pastes, mold release agents and waxes. (wikipedia.org)
- Combining Polipol polyester resins and Polives vinyl ester resin as well as gelcoat products, Composite performance materials provides products for the construction, transport, marine, defense, wind energy, sports equipment, chemical containment industries. (wikipedia.org)
- The energy density (irradiance x irradiation time) (10) influences the degree and depth of cure and the mechanical properties of light cured resin composite (1,8,10). (scielo.br)
- GRADIA DIRECT is a light-cured, micro-filled hybrid resin composite with microfine pre-polymer resin fillers, a unique coupling agent and urethane dimethacrylate co-monomer matrix. (gcamerica.com)
- Light-cured composite resins are being more used specially because they are aesthetically advantageous and enable to be polymerized by physical and chemical activators 8,30 . (scielo.br)
- Odontologically they can be filled by light-cured composite resin when applied in two applications. (wikipedia.org)
- Furthermore, glass fibre reinforced plastics (GFRP) sandwich with phenolic resins as matrix system find their application in the interior due to their low weight to stiffness ratio. (springer.com)
- Phenol formaldehyde resins (PF) or phenolic resins are synthetic polymers obtained by the reaction of phenol or substituted phenol with formaldehyde. (wikipedia.org)
- At this point the resin is a 3-dimensional network, which is typical of polymerised phenolic resins. (wikipedia.org)
- Phenolic resins are found in a myriad of industrial products. (wikipedia.org)
- Micarta was developed by George Westinghouse at least as early as 1910 using phenolic resins invented by Leo Baekeland. (wikipedia.org)
- Sizing adhesives or resins are used to fill paper, textile webs, and other fibrous products. (globalspec.com)
- Dental Composite Resins are types of synthetic Resins which are used in dentistry as restorative Material or adhesives. (babyhorse.org)
- The classic variety is epoxy resin, manufactured through polymerization-polyaddition or polycondensation reactions, used as a thermoset polymer for adhesives and composites. (wikipedia.org)
- Dental composite resins (better referred to as "resin-based composites" or simply "filled resins") are types of synthetic resins which are used in dentistry as restorative material or adhesives. (wikipedia.org)
- These are used in thermoset polymer matrix composites, cements, adhesives, coatings and casting/foundry resins. (wikipedia.org)
- the polymers and adhesives added make wood-plastic composite difficult to recycle again after use. (wikipedia.org)
- The resin is flame resistant and provides the fuel cells with excellent thermal and electrical conductivity, a low ionic content and can be applied in continuous high volume manufacturing processes using conventional prepregging techniques. (netcomposites.com)
- Typically more translucent, and containing more photoinitiators than conventional composites, they allow deeper cures. (zyris.com)
- The conventional hybrid composite resin polished well at the 1-month postoperative appointment and maintained a reasonable polish for more than a decade. (dentalproductshopper.com)
- the resin is prone to chipping when being cut with conventional table saws. (wikipedia.org)
- This results in a more durable hybrid composite structure that is between 20 and 30% stronger (with only 0.5% CNT contents) than a conventional reinforced plastic. (wikipedia.org)
- These microfilled composite resins also showed a better clinical colour stability and higher resistance to wear than conventional composites, which favoured their tooth tissue-like appearance as well as clinical effectiveness. (wikipedia.org)
- LVL is a member of the structural composite lumber (SCL) family of engineered wood products that are commonly used in the same structural applications as conventional sawn lumber and timber, including rafters, headers, beams, joists, rim boards, studs and columns. (wikipedia.org)
- One major advantage of the resin-retained bridge over a conventional bridge is the failure mode is likely to be debonding of the retainer. (wikipedia.org)
- Human enamel and dent in should be used as the physiologic standards with which to compare composite resins, especially in the posterior region. (ebscohost.com)
- Fees for composite (resin) fillings for anterior (front) and posterior (back) teeth. (animated-teeth.com)
- Failure mode of a posterior composite resin bonded to a glass-ionomer cement treated with various etching times and with or without a coupling agent. (quintpub.com)
- The purpose of this study was to determine the failure mode of a posterior composite resin bonded to a glass-ionomer cement that was treated with and without a cationic vinyl functional silane coupling agent while the etch times were varied. (quintpub.com)
- Publications] Yoshiaki Tani: 'Marginal Fracture Toughness of Posterior Composite Resins' Transactions of Fifth World Biomaterials Congress. (nii.ac.jp)
- Nexcomp is Nano Hybrid Composite Resin for Anterior and Posterior Resorations. (ecrater.co.uk)
- Cavity liners for posterior resin based composites? (nationalelfservice.net)
- Home » Posts » Dentistry » restorative dentistry » Cavity liners for posterior resin based composites? (nationalelfservice.net)
- In the 1990s and 2000s, such composites were greatly improved and have a compression strength sufficient for use in posterior teeth. (wikipedia.org)
- A major global supplier of resins, gel coats, colorants and synergistic systems for composites and cast polymers. (compositesone.com)
- During the polymerization of the resin composites, they shrink as a result of the conversion of the monomers into rigid polymers by a radical addition reaction. (dissertations.se)
- Polymers used in the composition of composite resins may absorb water and chemicals from the oral environment (sorption) and may release some of their own components (solubility) 1,12 . (scielo.br)
- Single-monomer resins may be used in the process, which form homopolymers (polymers containing only one type of polymer). (wikipedia.org)
- This reaction is very common in hydrolytic degradation of the dental resin since salivary esterases are able to cleave the ester bonds in acrylic polymers of dental composites. (wikipedia.org)
- The plastic matrix may be a thermoset polymer matrix - most often based on thermosetting polymers such as epoxy, polyester resin, or vinylester - or a thermoplastic. (wikipedia.org)
- The most common gelcoats are thermosetting polymers based on epoxy or unsaturated polyester resin chemistry. (wikipedia.org)
- They are cured to form crosslinked polymers and are subsequently backed with thermoset polymer matrix composites which are often mixtures of polyester resin and fiberglass, or epoxy resin which is most commonly used with carbon fibre for higher specific strength. (wikipedia.org)
- Poliya Composite Resins and Polymers, Inc. (Poliya) was founded in 1983 and specializes in developing and manufacturing polymers and composite resins. (wikipedia.org)
- Monomers, polymers and composites from renewable resources. (wikipedia.org)
- The recent development of the process of filler or cross-linking agent additions to resin compounds is also introduced. (mdpi.com)
- Nonshrinking resins and modified filler particles have been developed to tackle this problem, but they have not yet been shown to clinically last [ 6 , 14 ]. (hindawi.com)
- During the last decades, the use of new resin composites with more optimized filler loading have resulted in reduced clinical wear. (dissertations.se)
- Composites consist mainly of filler particles and a resin matrix based on different monomers 6 . (scielo.br)
- 5. The resin composition for a printed circuit board according to claim 1, further comprising a filler (C). (patents.com)
- Additives to polyurethane resins include any one of the following: thixotrope, pigment, filler, UV absorbers and fire retardant. (compositesaustralia.com.au)
- Composite resins are most commonly composed of Bis-GMA and other dimethacrylate monomers (TEGMA, UDMA, HDDMA), a filler material such as silica and in most current applications, a photoinitiator. (wikipedia.org)
- As the sales figures also show, the Bakelite Company produced "Transparent" cast resin (which did not include filler) for a small ongoing market during the 1910s and 1920s. (wikipedia.org)
- The resin often contains a significant amount of filler. (wikipedia.org)
- Wood flour is commonly used as a filler in thermosetting resins such as bakelite, and in linoleum floor coverings. (wikipedia.org)
- Through filler compounds, various properties of the composite bearing, such as resistance to creep, wear and electrical conductivity, can be optimized. (wikipedia.org)
- Nour F. Attia and Mohamed Zayed, "Nanoparticles Decorated on Resin Particles and Their Flame Retardancy Behavior for Polymer Composites," Journal of Nanomaterials , vol. 2017, Article ID 7381787, 8 pages, 2017. (hindawi.com)
- The particulate reinforced composites consist of tiny particles having thickness in the micron [ 5 , 6 ] and nanoscales [ 7 ] embedded into a matrix. (hindawi.com)
- The invention concerns a process for preparing composite resin particles having the so-called semi-IPN (inter penetration network) structure, in which linear thermoplastic polymer chains get entangled with a crosslinked polymer core through partial or thorough penetration. (google.com)
- The present invention relates to a novel method for the preparation of composite resin particles having the so-called semi-IPN (inter penetration network) structure in which linear thermoplastic polymer chains get entangled with crosslinked polymer core by thorough or partial penetration, and the composite resin particles thus prepared. (google.com)
- Solvent Impregnated Resins (SIRs) are porous resin particles which contain an additional liquid extractant inside the porous matrix. (wikipedia.org)
- The contained extractant is supposed to enhance the capacity of the resin particles. (wikipedia.org)
- Wood-plastic composites (WPCs) are produced by thoroughly mixing ground wood particles and heated thermoplastic resin. (wikipedia.org)
- In the interim period, advances in infusable vinylester resin chemistry have seen the incorporation of nano particles into the resin. (wikipedia.org)
- These particles aid the transfer of the resin through the carbon/glass fibre matrix and allow the use of fire retardant grade vinylester for infusion. (wikipedia.org)
- Effect of hydroxyapatite whisker surface graft polymerization on water sorption, solubility and bioactivity of the dental resin composite. (sigmaaldrich.com)
- In vitro bioactivity of the studied resin composites in simulated body fluid (SBF) showed that a dense and continuous apatite layer was formed on the surface of the resin composite, and the surface graft polymerization on the whisker did not significantly affect the apatite forming ability of the resin composite. (sigmaaldrich.com)
- It was revealed that graft polymerization of an appropriate amount of Bis-GMA onto HW could be an effective method to improve the interfacial properties and stability in water of the dental resin composite without compromising the bioactivity. (sigmaaldrich.com)
- Currently, the most widely marketed composite resins are based on the polymerization of bisphenol A glycol dimethacrylate (Bis-GMA) and urethane dimethacrylate (UDMA) 25 . (scielo.br)
- Challenges especially in the minimal invasive restorative treatment of teeth require further developments of composite polymerization techniques. (springer.com)
- Anić I, Pavelić B, Perić B, Matsumoto K (1996) In vitro pulp chamber temperature rises associated with the argon laser polymerization of composite resin. (springer.com)
- Blankenau RJ, Powell GL, Kelsey WP, Barkmeier WW (1991) Post polymerization strength values of an argon laser cured resin. (springer.com)
- Synthetic casting "resin" for embedding display objects in Plexiglas/Lucite (PMMA) is simply methyl methacrylate liquid, into which a polymerization catalyst is added and mixed, causing it to "set" (polymerize). (wikipedia.org)
- In such uses, the "curing agent" mixed with the resin contains what is loosely referred to as a "catalyst," but which is more technically an initial source of free radicals (such as MEKP) to act as an initiator in a free-radical chemical chain reaction polymerization. (wikipedia.org)
- Most commonly a thermosetting resin is used that polymerizes by mixing with a curing agent (polymerization catalyst) at room temperature and normal pressure. (wikipedia.org)
- Phenol-formaldehyde resins, as a group, are formed by a step-growth polymerization reaction that can be either acid- or base-catalysed. (wikipedia.org)
- Traditionally resin-based composites set by a chemical setting reaction through polymerization between two pastes. (wikipedia.org)
- Feilzer, Albert J (Dec 1984), "The competition between the composite-dentin bond strength and the polymerization contraction stress", J Dent Res. (wikipedia.org)
- Cakar worked on polymerization and resins at Ilkester, leaving to found a start-up. (wikipedia.org)
- Bond Strength Variation of Synthetic Resin Teeth in Dentures. (ebscohost.com)
- The bond strength of denture teeth to acrylic resin denture bases was determined by producing tensile test specimens from standardised and anonymously presented partial dentures. (ebscohost.com)
- A conservative amount of translucent (Trans) composite was placed along the incisal one-fourth to allow for subtle incisal translucency, mimicking the patient s natural teeth. (aacd.com)
- The teeth were thermocycled 1000 cycles, immersed in 1% methylene blue dye for 24 h, and invested in acrylic resin. (quintpub.com)
- Objective: The color stability of laboratory-made composite veneers was compared to that of artificial resin teeth under in vivo conditions. (quintpub.com)
- The resin teeth showed no significant changes in the AE* values. (quintpub.com)
- You can also learn more about this topic by reading the Dear Doctor magazine article " Artistic Repair of Front Teeth with Composite Resin . (southshoredentist.com)
- Composite resins should undergo attentive tests to specify their biocompatibility before they have contact with the teeth, regardless of physico-mechanical properties. (alliedacademies.org)
- The teeth were embedded in polyester resin and polished in order to obtain a flat E or D surface. (quintpub.com)
- A complete oral examination revealed no significant problems or pathosis, other than her unsightly old single resin restoration wedged between teeth Nos. (dentalproductshopper.com)
- Visible light-polymerized resin composite tabs were bonded to the flattened, acid-etched surface of teeth that were scheduled for extraction. (quintpub.com)
- The teeth restored by direct composite filling technique were also tested as control. (nii.ac.jp)
- In clinic, carious molar teeth were restored with composite inlay with each marginal form. (nii.ac.jp)
- Conditioning root canal either with CHX-EDTA or 17% EDTA delivered superior retention values for fiber-reinforced composite resin posts with composite resin cores that were luted with self-adhesive resin cement to endodontically treated teeth with 2 mm remaining coronal structure. (ovid.com)
- A Composite filling is a tooth-colored plastic and glass mixture used to restore decayed teeth. (babyhorse.org)
- The resin-retained bridge is a good treatment option for many missing teeth as it is relatively cheap when compared to alternatives such as dental implants, requires little or no damage to the surrounding teeth during preparation for placement, and it is well tolerated by patients. (wikipedia.org)
- The composites used in dentistry consist of different organic molecules. (alliedacademies.org)
- In dentistry, an inlay is usually an indirect restoration (filling) consisting of a solid substance (as gold, porcelain or less often a cured composite resin) fitted to a cavity in a tooth and cemented into place. (wikipedia.org)
- Bis-GMA-based resins in dentistry: are they safe? (wikipedia.org)
- The resin-retained bridge is increasingly being used in modern dentistry as an alternative to more destructive treatments. (wikipedia.org)
- Restoring Nonvital Premolars with Composite Resin Onlays: Effect of Different Fiber-reinforced Composite Layers on Marginal Adaptation and Fracture Load. (ebscohost.com)
- Mechanical properties for composites with 58% fiber volume IM7-6K-4HS carbon fiber fabric, after standard cure + postcure unless otherwise noted. (matweb.com)
- The purpose of this in vitro study was to test the effect of remaining coronal structure on the retention of airborne-particle abraded fiber-reinforced composite resin posts built up with composite resin cores after the treatment of root canal dentin with different conditioning protocols. (ovid.com)
- Glass fiber-reinforced composite resin posts were airborne-particle abraded and luted to the root canal dentin with a self-adhesive resin cement (RelyX Unicem). (ovid.com)
- The process involves the use of a vacuum to facilitate resin flow into a fiber layup contained within a mold tool covered by a vacuum bag. (wikipedia.org)
- The resin to fiber ratio is important for determining the overall strength and performance of the final part, with mechanical strength being most influenced by the type of fiber reinforcement. (wikipedia.org)
- Therefore if factors such as fiber to resin ratio and cross-sectional fiber distribution were held constant for each process, the molded part performances would be similar. (wikipedia.org)
- RTM has a fiber preform placed between mold halves, while VARTM uses the bottom part of the mold tool and a vacuum bag with resin flow caused by the use of a vacuum. (wikipedia.org)
- The fuselage is carbon and glass fiber composite with epoxy resin. (wikipedia.org)
- Epoxy / carbon fiber and other advanced composites were also pioneered there. (wikipedia.org)
- Fiber volume ratio is an important mathematical element in composite engineering. (wikipedia.org)
- Voids are often formed in a composite structure throughout the manufacturing process and must be calculated into the total fiber volume fraction of the composite. (wikipedia.org)
- The fraction of fiber reinforcement is very important in determining the overall mechanical properties of a composite. (wikipedia.org)
- A higher fiber volume fraction typically results in better mechanical properties of the composite. (wikipedia.org)
- Calculating the volume of fiber ratio in a composite is relatively simple. (wikipedia.org)
- Knowing the initial weight of the composite specimen as well as the densities of the fiber and resin, the volume fraction of both the fiber and matrix in the original laminate may be determined. (wikipedia.org)
- This method is generally used for composites composed of carbon fiber reinforcement. (wikipedia.org)
- Computer programs aid in the analysis of fiber ratio in the photomicrograph of the polished composite specimen. (wikipedia.org)
- The amount of fiber in a fiber reinforced composite directly corresponds with the mechanical properties of the composite. (wikipedia.org)
- Given the fiber volume fraction, the theoretical elastic properties of a composite can be determined. (wikipedia.org)
- In addition, short fiber thermoplastic composites are easier and cheaper to produce than continuous fiber reinforced composites. (wikipedia.org)
- Mechanical properties of short fiber reinforced composites depend critically on the fiber length distribution (FLD) and the fiber orientation distribution (FOD). (wikipedia.org)
- In particular, the strength of short fiber reinforced composites increases with the increase of the mean fiber length and with the decrease of the mean fiber orientation angle (angle between the fiber axis and the loading direction). (wikipedia.org)
- The elastic modulus (E) of misaligned short fiber reinforced polymer composites depends on the distributions of fiber lengths and orientations within the composite structure. (wikipedia.org)
- When the mean fiber length is large, it has nearly no influence on the elastic modulus of short fiber reinforced composites. (wikipedia.org)
- An important issue for short fiber thermoplastic composites is void formation and growth during production processes. (wikipedia.org)
- In other words, the stress within the composite is proportional to the fiber volume fraction and the stress on a single fiber. (wikipedia.org)
- Three-dimensional Composites utilize fiber preforms constructed from yarns or tows arranged into complex three-dimensional structures. (wikipedia.org)
- Advanced Composites consist of fiber and matrix combinations that yield superior strength and stiffness. (wikipedia.org)
- It is a 2-seat, high-performance motorized glider, constructed from fiber reinforced plastic (FRP) composites, featuring full span flight controls and a T-tail (with fixed horizontal stabilizer and two-piece elevator). (wikipedia.org)
- The elevator halves are a hybrid composite (carbon and glass fiber) monolithic shell. (wikipedia.org)
- When impregnated with a plastic resin and baked it forms carbon-fiber-reinforced polymer (often referred to as carbon fibre) which has a very high strength-to-weight ratio, and is extremely rigid although somewhat brittle. (wikipedia.org)
- Because glass fiber itself is sometimes referred to as "fiberglass", the composite is also called "fiberglass reinforced plastic. (wikipedia.org)
- Confusingly, many glass fiber composites continued to be called "fiberglass" (as a generic name) and the name was also used for the low-density glass wool product containing gas instead of plastic. (wikipedia.org)
- Micarta is a brand name for composites of linen, canvas, paper, fiberglass, carbon fiber or other fabric in a thermosetting plastic. (wikipedia.org)
- Advanced composite thermoplastics can also be compression molded with unidirectional tapes, woven fabrics, randomly oriented fiber mat or chopped strand. (wikipedia.org)
- If either of the two components of polyurethane resins come in contact with the eyes and skin they can cause irritation. (compositesaustralia.com.au)
- Since 2000, however, epoxy and polyurethane resins are used in interiors as well, mainly in Western Europe. (wikipedia.org)
- The so-called synthetic resins used include polystyrene resin, polyurethane resin, epoxy resin, unsaturated polyester resin, acrylic resin and silicone resin. (wikipedia.org)
- After the mold has been made, a synthetic resin - such as polyurethane or epoxy - mixed with a curing agent, is poured into each mold cavity. (wikipedia.org)
- Earlier examples also include acid catalyzed ring opening of epoxidized soybean oil to make oleochemical polyols for polyurethane foams and acid catalyzed ring opening of soy fatty acid methyl esters with multifunctional polyols to form new polyols for casting resins. (wikipedia.org)
- Sodium depletion has also allowed hollow glass microspheres to be used in chemically sensitive resin systems, such as long pot life epoxies or non-blown polyurethane composites Additional functionalities, such as silane coatings, are commonly added to the surface of hollow glass microspheres to increase the matrix/microspheres interfacial strength (the common failure point when stressed in a tensile manner). (wikipedia.org)
- On a microscopic level, the behaviour of a thermosetting resin based composite is affected by the formation of interphase regions that greatly affect the cure kinetics and hence the mechanical and physical properties of the composite, which are dependent on the inter-constituent variations in local properties such as modulus and glass transition temperature. (springer.com)
- It is shown that the molecular interactions between the constituents (as initiated by the sizing) are affected by processing conditions such as temperature and rate of resin flow, and that heat evolution and resin rheology may be affected by the stoichiometric imbalances resulting from interphasial level reactions. (springer.com)
- Effect of Storage Temperature on the Shelf Life of Self-adhesive Resin Cements. (ebscohost.com)
- High Temperature Composite Resin Industry 2018 Global Market Research report 2018 covers a detailed study of the High Temperature Composite Resin Market size, growth, and share, trends, consumption, segments, application and Forecast 2025. (openpr.com)
- Resins that can withstand extreme heat and temperature environments are considered as high temperature composite resin. (openpr.com)
- Layup was the largest manufacturing company for high temperature composite resins. (openpr.com)
- Moreover, the market will be propelled by superior thermal performance presented by high temperature composite resins. (openpr.com)
- To gain insightful analyses of the market and have comprehensive understanding of the Global High Temperature Composite Resin Market and its commercial landscape. (openpr.com)
- Assess the High Temperature Composite Resin production processes, major issues, and solutions to mitigate the development risk. (openpr.com)
- This means there is no need to worry about the resin surface peeling in high-humidity outdoor environments or environments with large temperature variation. (kurabo.co.jp)
- We have developed a form of the base resin that preliminary data shows will not advance when stored at room temperature for one year. (sbir.gov)
- After the impregnation occurs the composite part is allowed to cure at room temperature with an optional post cure sometimes carried out. (wikipedia.org)
- The type of resin used will primarily determine the corrosion resistance, heat distortion temperature, and surface finish. (wikipedia.org)
- Polycrystalline Diamond Composite or Compacts (PDC): They are made by combining some layers of polycrystalline diamonds (PCD) with a layer of cemented carbide liner at high temperature and high pressure. (wikipedia.org)
- Pressure is maintained, together with elevated temperature, to allow the curing of the resin and low porosity. (wikipedia.org)
- Used where reentry temperature was below 1,260 °C. Fibrous refractory composite insulation (FRCI) tiles, used to provide improved strength, durability, resistance to coating cracking and weight reduction. (wikipedia.org)
- Precision granite castings are produced by mixing granite aggregates (which are crushed, washed, and dried) with an epoxy resin system at ambient temperature (i.e., cold curing process). (wikipedia.org)
- Polymer cast resins use very little energy to produce, and the casting process is done at room temperature. (wikipedia.org)
- The curing of the resin is done at room temperature. (wikipedia.org)
- These resins were used to impregnate paper and cotton fabric which were cured under pressure and high temperature to produce laminates. (wikipedia.org)
- Composite bearings can be customized to meet the individual requirements of many applications, such as wear- or high-temperature resistance. (wikipedia.org)
- In this technique, a transparent acrylic resin matrix is fabricated before preparation of the facial surface of the tooth, to allow the adequate reproduction of contour, shape, and surface texture originally exhibited by the tooth. (ebscohost.com)
- Each tooth was then mounted in acrylic resin and sectioned on a hard tissue microtome. (quintpub.com)
- Acrylic resin, in particular the methyl methacrylate type of synthetic resin, produces acrylic glass (also called PMMA, Lucite, Plexiglass), which is not a glass but a plastic polymer that is transparent, and very hard. (wikipedia.org)
- It is an acrylic resin. (wikipedia.org)
- Fracture Toughness Testing of Visible Light- and Chemical-Initiated Provisional Restoration Resins. (ebscohost.com)
- By characterizing biofilm-enhanced degradation may lead to the development of new composites with increased restoration lifetime. (umich.edu)
- MIFL Composite restoration - This would refer to a white filling involving the mesial, incisal, facial and lingual surfaces of a front tooth. (animated-teeth.com)
- The following case images will illustrate two different ways in which white calcification effects can be created within a direct anterior composite restoration. (aacd.com)
- The composite used for this restoration was Estelite Omega (Tokuyama Dental America). (aacd.com)
- 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. (aacd.com)
- Today's resin composites are generally of good quality, so the longevity of a restoration is above all dependent on factors related to the patient and operator. (niom.no)
- In contrast, a composite resin restoration usually requires much less tooth preparation and can be performed in the dental office in just one visit. (southshoredentist.com)
- To see if composite resin is a viable restoration option for your tooth, visit your dentist for a complete dental examination. (southshoredentist.com)
- However it was increased by thermocycling, while in direct composite restoration there was no effect of thermocycling. (nii.ac.jp)
- If the patient's occlusion does not permit for a mildly-retentive restoration, or if there is too much decay or a fracture within the tooth structure, a porcelain or composite veneer may not be placed with any adequate guarantee for its durability. (wikipedia.org)
- Davidon, Carel L (Nov 1987), "Setting stress in composite resin in relation to configuration of the restoration. (wikipedia.org)
- The final composites and their intermediates were characterized with complementary physicochemical methods, including XRD, SEM, thermal analysis (TG) and nitrogen sorption. (rsc.org)
- Sample sterilization/disinfection is usually performed by immersion in ethanol or mild irradiation, with the unverified assumption that other methods would degrade the composite. (umich.edu)
- 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. (umich.edu)
- Besides, there are factors that may contribute the differences between the various methods in measuring the amount of shrinkages and stresses of resin composites. (pubmedcentralcanada.ca)
- Objective: The purpose of this study is to compare two methods of chlorhexidine application of shear bond strength degradation between composite resin and dentin. (scirp.org)
- Damage to composite components is not always visible to the naked eye and the extent of damage is best determined for structural components by suitable Non Destructive Test (NDT) methods. (wikipedia.org)
- Throughout the 1980s, Holtzberg was granted 10 patents for composite engine parts and their methods of production. (wikipedia.org)
- The constituents of a composite are categorized as the reinforcement and the matrix. (hindawi.com)
- The new repair and composite fabrication process termed "PIP" Powder Infusion Process has be developed and void free flat panels fabricated buy multiple laboratories with both glass and carbon reinforcement. (sbir.gov)
- The present study aims to improve the reinforcement of hemp fibre to polypropylene (PP) by simple resin modification and fibre treatment. (hindawi.com)
- The majority of patents are for Polyamide-imide engine components, with the potential for graphite, glass or titanium reinforcement as a composite. (wikipedia.org)
- A new technique for the fabrication of composite resin direct veneers is presented. (ebscohost.com)
- Dental bonding costs- white fillings, composite (resin) veneers. (animated-teeth.com)
- Veneers are layered and a high strength resin is used in each layer. (wikipedia.org)
- Thin veneers (from .5mm to 2mm thick) of slate, schist, or sandstone (metamorphic rocks) are pulled away from the original thicker stone slabs by adhering a thin layer of fiberglass/polyester resin composite backing. (wikipedia.org)
- Flexible stone veneers were first created by accident in 1995 when a slate furniture designer Gernot Ehrlich of Germany found that when resins used to bond slate tiles were removed from a broken table top a remaining stone skin, or veneer, of the original stone was left attached to the resin. (wikipedia.org)
- Such resin compounds are useful for obtaining thick coatings, MEMS parts and bulk ceramics, which are difficult to obtain by pyrolysis of simple organometallic precursors without additives. (mdpi.com)
- Polyester resin is also the primary resin matrix used in compression molding, bulk molding compounds (BMC) and sheet molding compounds (SMC), and in the pultrusion process. (compositesone.com)
- Chemically they are very different from resinous compounds secreted by plants (see resin for discussion of the natural products). (wikipedia.org)
- The term has been used generically for most resin impregnated fibre compounds. (wikipedia.org)
- All preparations were etched with Scotchbond Etching Gel, the Adper Scotchbond Multipurpose Plus adhesive system was applied followed by photoactivation, and the cavities were filled with a single increment of Filtek Z350 XT, Filtek Z350 XT Flow, or bulk-fill X-tra fil resin composite ( n = 10) followed by photoactivation. (hindawi.com)
- Although all three composites demonstrated a high prevalence of adhesive failures, the bond strength values of the different resin composites photoactivated by LED showed that the X-tra fil resin composite had a lower bond strength than the Filtek Z350 XT and Filtek Z350 XT Flow resin composites. (hindawi.com)
- The resin surface and aluminum core are bonded firmly together via an adhesive layer. (kurabo.co.jp)
- To evaluate the effect of nonvital bleaching on the shear bond strength of composite resin using three adhesive systems. (quintpub.com)
- 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. (quintpub.com)
- The effect of the applied power on chemical changes of the plasma polymer on a ceramic surface and the adhesive strength between the composite resin and feldspathic porcelain were examined. (quintpub.com)
- Bond failure occurred at the glass-ionomer cement-composite resin interface (adhesive failure) in specimens that were not etched and when no coupling agent was used. (quintpub.com)
- Araldite adhesive sets by the interaction of a resin with a hardener. (wikipedia.org)
- Araldite adhesive is used to join together the two sections of carbon composite which make up the monocoque of the Lamborghini Aventador. (wikipedia.org)
- In addition to enhancing automotive performance, composite bearings' split ring design allows them to be press fitted, without the need for adhesive or excessive assembly force. (wikipedia.org)
- Liquid resin is difficult to feather and diffuse but works great for other characteristics such as craze lines or more intense spots or effects. (aacd.com)
- Figure 5: White liquid resin placed using a fine-tip sable brush along incisal portion. (aacd.com)
- Pressure and/or centrifugal force can be used to help push the liquid resin into all details of the mold. (wikipedia.org)
- Its ability to adapt to the underlying tooth or composite layer is the BEST I've experienced. (cosmedent.com)
- In skilled, artistic hands composite resins can be used effectively in a number of situations to restore a tooth to normal appearance. (southshoredentist.com)
- The faults with composite resins at this time were that they had poor appearance, poor marginal adaptation, difficulties with polishing, difficulty with adhesion to the tooth surface, and occasionally, loss of anatomical form. (wikipedia.org)
- A resin-retained bridge is a bridge (a fixed dental prosthesis) replacing a missing tooth that relies for its retention on a composite resin cement. (wikipedia.org)
- The intrinsic surface roughness of composite resins must be equal to or lower than the surface roughness of human enamel on enamel-to-enamel occlusal. (ebscohost.com)
- Surface roughness analysis showed that all composite surfaces increased in R a indicating biofilm-driven degradation. (umich.edu)
- A partial correlation was observed between composite resin roughness and bacterial adhesion when the second and particularly the third-order statistical moments of the composite resin height distributions were considered. (ovid.com)
- The objective of this in vitro study was to evaluate the surface roughness of four flowable composites (SureFil SDR flow, TetricEvoFlow, Esthet-X Flow, Amaris Flow HT) after exposure to acidic and alcoholic drinks using a Leica DCM (Dual Core Measuring) 3D microscope. (leica-microsystems.com)
- The null hypothesis of the study was that there is no significant difference in surface roughness of the evaluated flowable composites. (leica-microsystems.com)
- Dental composite (resin) is used to create white fillings. (animated-teeth.com)
- Secondary caries and fractures are considered to be the most common reasons for replacement of resin composite fillings. (niom.no)
- In many studies, it was found that resin composite fillings may cause pulp inflammations, genotoxic, mutagenic and estrogenic effects due to extracts from resin composites. (alliedacademies.org)
- While short term studies come to inconsistent conclusions, a respectable number of long-term studies detect no significantly lower failure rates of ceramic or composite inlays compared to composite direct fillings. (wikipedia.org)
- Qvist, V. "Composite resin fillings and inlays. (wikipedia.org)
- See also AT-10 resin, melamine resin. (wikipedia.org)
- The principal use of melamine resin is as the main constituent of high-pressure laminates, such as Formica and Arborite, and of laminate flooring. (wikipedia.org)
- Melamine-resin tile wall panels can also be used as whiteboards. (wikipedia.org)
- Melamine resin is often used in kitchen utensils and plates (such as Melmac). (wikipedia.org)
- Melamine resin utensils and bowls are not microwave safe. (wikipedia.org)
- Melamine foam is a special form of melamine resin. (wikipedia.org)
- In common use, the term refers to the company's classic product, a heat-resistant, wipe-clean, plastic laminate of paper or fabric with melamine resin. (wikipedia.org)
- When MWNTs content of the composites is 1 wt%, as compared to neat resin, the flexural strength increases from 143 Mpa to 156 MPa, the modulus increases from 3563 Mpa to 3691 MPa, and the volume and surface resistance of nanocomposites decrease by two orders of magnitude, respectively. (hindawi.com)
- Flexural strength and hardness of direct and indirect composites. (ebscohost.com)
- The objective of this study was to evaluate the flexural strength (Ïƒf) and hardness (H) of direct and indirect composites, testing the hypotheses that direct resin composites produce higher Ïƒf and H values than indirect composites and that these properties are positively related. (ebscohost.com)
- The aim of this study was to evaluate the effect of light-curing units, curing mode techniques and storage media on sorption, solubility and biaxial flexural strength (BFS) of a composite resin. (scielo.br)
- Fillers are often added in quantities up to 50% of the resin weight although such addition levels will reduce the flexural and tensile strength of the laminate. (amtcomposites.co.za)
- Specimen dimensions prepared in accordance with ISO 4049 do not allow for comparison of the effect of light attenuation distance on the flexural strength of resin composite tested. (uzh.ch)
- Though the setting of a dental composite is not a purely elastic situation, an increased E-modulus has been related to higher stress [ 4 - 6 ] and the higher the E-modulus, the greater the stiffness. (hindawi.com)
- Then, the insert membranes with a 3 µm pore width compatible for plates were inserted and dental composite samples were added. (alliedacademies.org)
- The higher the C-factor, the less free surfaces there will be, and thus, there is little chance for the dental composite to flow and adapt changes in volume. (pubmedcentralcanada.ca)
- Resiment® Ready-Mix Filled Composite Resin Cement, Standard - JL Blosser Inc. (pattersondental.com)
- Resiment® Ready-Mix self-curing resin cement is used for the final cementation of crowns, bridges, implant prosthesis, inlays and onlays, Maryland bridges, pins and posts, pit and fissure sealant and periodontal splinting. (pattersondental.com)
- To determine whether resin-modified glass-ionomer cement (RM-GIC), when compared with composite resins (CR), offers a significant caries-preventive effect. (springer.com)
- Fluoride release and cariostatic ability of a compomer and a resin-modified glass ionomer cement used for orthodontic bonding. (springer.com)
- Cytotoxic evaluation of different composite resins and one glass-ionomer cement in cultures of human periodontal ligament cells. (edu.au)
- The intaglio is treated in some way to enhance the micromechanical adhesion between the prosthesis and the composite resin cement. (wikipedia.org)
- Two of the resins were light initiated, while the other two were chemically initiated. (ebscohost.com)
- The seed is surrounded by a double shell containing an allergenic phenolic resin, anacardic acid, a potent skin irritant chemically related to the better-known allergenic oil urushiol which is also a toxin found in the related poison ivy. (wikipedia.org)