The total of dental diagnostic, preventive, and restorative services provided to meet the needs of a patient (from Illustrated Dictionary of Dentistry, 1982).
Use for articles concerning dental education in general.
Educational institutions for individuals specializing in the field of dentistry.
Individuals enrolled a school of dentistry or a formal educational program in leading to a degree in dentistry.
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.
Dental care for patients with chronic diseases. These diseases include chronic cardiovascular, endocrinologic, hematologic, immunologic, neoplastic, and renal diseases. The concept does not include dental care for the mentally or physically disabled which is DENTAL CARE FOR DISABLED.
The giving of attention to the special dental needs of children, including the prevention of tooth diseases and instruction in dental hygiene and dental health. The dental care may include the services provided by dental specialists.
Facilities where dental care is provided to patients.
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)
Persons trained in an accredited school or dental college and licensed by the state in which they reside to provide dental prophylaxis under the direction of a licensed dentist.
The teaching staff and members of the administrative staff having academic rank in a dental school.
Dental care for the emotionally, mentally, or physically disabled patient. It does not include dental care for the chronically ill ( = DENTAL CARE FOR CHRONICALLY ILL).
Abnormal fear or dread of visiting the dentist for preventive care or therapy and unwarranted anxiety over dental procedures.
Insurance providing coverage for dental care.
Personnel whose work is prescribed and supervised by the dentist.
Services designed to promote, maintain, or restore dental health.
The study of laws, theories, and hypotheses through a systematic examination of pertinent facts and their interpretation in the field of dentistry. (From Jablonski, Illustrated Dictionary of Dentistry, 1982, p674)
The giving of attention to the special dental needs of the elderly for proper maintenance or treatment. The dental care may include the services provided by dental specialists.
The curve formed by the row of TEETH in their normal position in the JAW. The inferior dental arch is formed by the mandibular teeth, and the superior dental arch by the maxillary teeth.
A film that attaches to teeth, often causing DENTAL CARIES and GINGIVITIS. It is composed of MUCINS, secreted from salivary glands, and microorganisms.
The room or rooms in which the dentist and dental staff provide care. Offices include all rooms in the dentist's office suite.
Data collected during dental examination for the purpose of study, diagnosis, or treatment planning.
Personnel who provide dental service to patients in an organized facility, institution or agency.
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)
Nonspecialized dental practice which is concerned with providing primary and continuing dental care.
An alloy used in restorative dentistry that contains mercury, silver, tin, copper, and possibly zinc.
Individuals who assist the dentist or the dental hygienist.
Educational programs designed to inform dentists of recent advances in their fields.
A range of methods used to reduce pain and anxiety during dental procedures.
Biocompatible materials placed into (endosseous) or onto (subperiosteal) the jawbone to support a crown, bridge, or artificial tooth, or to stabilize a diseased tooth.
Radiographic techniques used in dentistry.
Presentation devices used for patient education and technique training in dentistry.
Educational programs for dental graduates entering a specialty. They include formal specialty training as well as academic work in the clinical and basic dental sciences, and may lead to board certification or an advanced dental degree.
The principles of proper professional conduct concerning the rights and duties of the dentist, relations with patients and fellow practitioners, as well as actions of the dentist in patient care and interpersonal relations with patient families. (From Stedman, 25th ed)
Hospital department providing dental care.
Individuals licensed to practice DENTISTRY.
Societies whose membership is limited to dentists.
The field of dentistry involved in procedures for designing and constructing dental appliances. It includes also the application of any technology to the field of dentistry.
A systematic collection of factual data pertaining to dental or oral health and disease in a human population within a given geographic area.
A chronic endemic form of hypoplasia of the dental enamel caused by drinking water with a high fluorine content during the time of tooth formation, and characterized by defective calcification that gives a white chalky appearance to the enamel, which gradually undergoes brown discoloration. (Jablonski's Dictionary of Dentistry, 1992, p286)
The granting of a license to practice dentistry.
Facilities for the performance of services related to dental treatment but not done directly in the patient's mouth.
Materials used in the production of dental bases, restorations, impressions, prostheses, etc.
Various branches of dental practice limited to specialized areas.
Amounts charged to the patient as payer for dental services.
Individuals responsible for fabrication of dental appliances.
The organization and operation of the business aspects of a dental practice.
Dense fibrous layer formed from mesodermal tissue that surrounds the epithelial enamel organ. The cells eventually migrate to the external surface of the newly formed root dentin and give rise to the cementoblasts that deposit cementum on the developing root, fibroblasts of the developing periodontal ligament, and osteoblasts of the developing alveolar bone.
The profession concerned with the teeth, oral cavity, and associated structures, and the diagnosis and treatment of their diseases including prevention and the restoration of defective and missing tissue.
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)
Providing for the full range of dental health services for diagnosis, treatment, follow-up, and rehabilitation of patients.
Education which increases the awareness and favorably influences the attitudes and knowledge relating to the improvement of dental health on a personal or community basis.
The psychological relations between the dentist and patient.
One of a set of bone-like structures in the mouth used for biting and chewing.
Efforts to prevent and control the spread of infections within dental health facilities or those involving provision of dental care.
Mesodermal tissue enclosed in the invaginated portion of the epithelial enamel organ and giving rise to the dentin and pulp.
An artificial replacement for one or more natural teeth or part of a tooth, or associated structures, ranging from a portion of a tooth to a complete denture. The dental prosthesis is used for cosmetic or functional reasons, or both. DENTURES and specific types of dentures are also available. (From Boucher's Clinical Dental Terminology, 4th ed, p244 & Jablonski, Dictionary of Dentistry, 1992, p643)
A detailed review and evaluation of selected clinical records by qualified professional personnel for evaluating quality of dental care.
The optimal state of the mouth and normal functioning of the organs of the mouth without evidence of disease.
Hand-held tools or implements especially used by dental professionals for the performance of clinical tasks.
Any waste product generated by a dental office, surgery, clinic, or laboratory including amalgams, saliva, and rinse water.
The grafting or inserting of a prosthetic device of alloplastic material into the oral tissue beneath the mucosal or periosteal layer or within the bone. Its purpose is to provide support and retention to a partial or complete denture.
Economic aspects of the dental profession and dental care.
"Decayed, missing and filled teeth," a routinely used statistical concept in dentistry.
A mixture of metallic elements or compounds with other metallic or metalloid elements in varying proportions for use in restorative or prosthetic dentistry.
The predisposition to tooth decay (DENTAL CARIES).
The application of computer and information sciences to improve dental practice, research, education and management.
The practice of personal hygiene of the mouth. It includes the maintenance of oral cleanliness, tissue tone, and general preservation of oral health.
The relationship of all the components of the masticatory system in normal function. It has special reference to the position and contact of the maxillary and mandibular teeth for the highest efficiency during the excursive movements of the jaw that are essential for mastication. (From Jablonski, Dictionary of Dentistry, 1992, p556, p472)
Removal of dental plaque and dental calculus from the surface of a tooth, from the surface of a tooth apical to the gingival margin accumulated in periodontal pockets, or from the surface coronal to the gingival margin.
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)
Use for material on dental facilities in general or for which there is no specific heading.
Devices used in the home by persons to maintain dental and periodontal health. The devices include toothbrushes, dental flosses, water irrigators, gingival stimulators, etc.
The branch of dentistry concerned with the prevention of disease and the maintenance and promotion of oral health.
Photographic techniques used in ORTHODONTICS; DENTAL ESTHETICS; and patient education.
The surgical removal of a tooth. (Dorland, 28th ed)
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)
A type of porcelain used in dental restorations, either jacket crowns or inlays, artificial teeth, or metal-ceramic crowns. It is essentially a mixture of particles of feldspar and quartz, the feldspar melting first and providing a glass matrix for the quartz. Dental porcelain is produced by mixing ceramic powder (a mixture of quartz, kaolin, pigments, opacifiers, a suitable flux, and other substances) with distilled water. (From Jablonski's Dictionary of Dentistry, 1992)
A rapid, low-dose, digital imaging system using a small intraoral sensor instead of radiographic film, an intensifying screen, and a charge-coupled device. It presents the possibility of reduced patient exposure and minimal distortion, although resolution and latitude are inferior to standard dental radiography. A receiver is placed in the mouth, routing signals to a computer which images the signals on a screen or in print. It includes digitizing from x-ray film or any other detector. (From MEDLINE abstracts; personal communication from Dr. Charles Berthold, NIDR)
The practice of dentistry concerned with preventive as well as diagnostic and treatment programs in a circumscribed population.
General or unspecified diseases of the stomatognathic system, comprising the mouth, teeth, jaws, and pharynx.
The practice of dentistry concerned with the dental problems of children, proper maintenance, and treatment. The dental care may include the services provided by dental specialists.
Professional society representing the field of dentistry.
Creation of a smooth and glossy surface finish on a denture or amalgam.
Patterns of practice in dentistry related to diagnosis and treatment.
Insertion of an implant into the bone of the mandible or maxilla. The implant has an exposed head which protrudes through the mucosa and is a prosthodontic abutment.
Pain in the adjacent areas of the teeth.
Laws and regulations pertaining to the field of dentistry, proposed for enactment or recently enacted by a legislative body.
Congenital absence of or defects in structures of the teeth.
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)
An acquired or hereditary condition due to deficiency in the formation of tooth enamel (AMELOGENESIS). It is usually characterized by defective, thin, or malformed DENTAL ENAMEL. Risk factors for enamel hypoplasia include gene mutations, nutritional deficiencies, diseases, and environmental factors.
Examination of the mouth and teeth toward the identification and diagnosis of intraoral disease or manifestation of non-oral conditions.
An approach or process of practicing oral health care that requires the judicious integration of systematic assessments of clinical relevant scientific evidence, relating to the patient's oral and medical condition and history, with the dentist's clinical expertise and the patient's treatment needs and preferences. (from J Am Dent Assoc 134: 689, 2003)
Any group of three or more full-time dentists, organized in a legally recognized entity for the provision of dental care, sharing space, equipment, personnel and records for both patient care and business management, and who have a predetermined arrangement for the distribution of income.
Endodontic diseases of the DENTAL PULP inside the tooth, which is distinguished from PERIAPICAL DISEASES of the tissue surrounding the root.
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.
Traumatic or other damage to teeth including fractures (TOOTH FRACTURES) or displacements (TOOTH LUXATION).
Abnormal concretion or calcified deposit that forms around the teeth or dental prostheses.
The teeth of the first dentition, which are shed and replaced by the permanent teeth.
The teeth collectively in the dental arch. Dentition ordinarily refers to the natural teeth in position in their alveoli. Dentition referring to the deciduous teeth is DENTITION, PRIMARY; to the permanent teeth, DENTITION, PERMANENT. (From Jablonski, Dictionary of Dentistry, 1992)
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)
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.
An index which scores the degree of dental plaque accumulation.
The act of cleaning teeth with a brush to remove plaque and prevent tooth decay. (From Webster, 3d ed)
Inability or inadequacy of a dental restoration or prosthesis to perform as expected.
A dental specialty concerned with the maintenance of the dental pulp in a state of health and the treatment of the pulp cavity (pulp chamber and pulp canal).
A dental specialty concerned with the restoration and maintenance of oral function by the replacement of missing TEETH and related structures by artificial devices or DENTAL PROSTHESES.
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.
The process of TOOTH formation. It is divided into several stages including: the dental lamina stage, the bud stage, the cap stage, and the bell stage. Odontogenesis includes the production of tooth enamel (AMELOGENESIS), dentin (DENTINOGENESIS), and dental cementum (CEMENTOGENESIS).
The largest and strongest bone of the FACE constituting the lower jaw. It supports the lower teeth.
Procedure of producing an imprint or negative likeness of the teeth and/or edentulous areas. Impressions are made in plastic material which becomes hardened or set while in contact with the tissue. They are later filled with plaster of Paris or artificial stone to produce a facsimile of the oral structures present. Impressions may be made of a full complement of teeth, of areas where some teeth have been removed, or in a mouth from which all teeth have been extracted. (Illustrated Dictionary of Dentistry, 1982)
Pathological processes involving the PERIODONTIUM including the gum (GINGIVA), the alveolar bone (ALVEOLAR PROCESS), the DENTAL CEMENTUM, and the PERIODONTAL LIGAMENT.
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.
A means of identifying the age of an animal or human through tooth examination.
Chemicals especially for use on instruments to destroy pathogenic organisms. (Boucher, Clinical Dental Terminology, 4th ed)
The application of dental knowledge to questions of law.
Agents used to occlude dental enamel pits and fissures in the prevention of dental caries.
A course of study offered by an educational institution.
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)
A dental specialty concerned with the histology, physiology, and pathology of the tissues that support, attach, and surround the teeth, and of the treatment and prevention of disease affecting these tissues.
True-false questionnaire made up of items believed to indicate anxiety, in which the subject answers verbally the statement that describes him.
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.
Accumulations of microflora that lead to pathological plaque and calculus which cause PERIODONTAL DISEASES. It can be considered a type of BIOFILMS. It is subtly distinguished from the protective DENTAL PELLICLE.
Requirements for the selection of students for admission to academic institutions.
Such malposition and contact of the maxillary and mandibular teeth as to interfere with the highest efficiency during the excursive movements of the jaw that are essential for mastication. (Jablonski, Illustrated Dictionary of Dentistry, 1982)
Substances that inhibit or arrest DENTAL CARIES formation. (Boucher's Clinical Dental Terminology, 4th ed)
Progressive loss of the hard substance of a tooth by chemical processes that do not involve bacterial action. (Jablonski, Dictionary of Dentistry, 1992, p296)
One of a pair of irregularly shaped bones that form the upper jaw. A maxillary bone provides tooth sockets for the superior teeth, forms part of the ORBIT, and contains the MAXILLARY SINUS.
A polysaccharide-producing species of STREPTOCOCCUS isolated from human dental plaque.
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.
The 32 teeth of adulthood that either replace or are added to the complement of deciduous teeth. (Boucher's Clinical Dental Terminology, 4th ed)
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.
Surgical procedures used to treat disease, injuries, and defects of the oral and maxillofacial region.
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.
Total lack of teeth through disease or extraction.
Control, direction and financing of the total dental care of the population by a national government.
The branch of dentistry concerned with the dental problems of older people.
A dental specialty concerned with the diagnosis and surgical treatment of disease, injuries, and defects of the human oral and maxillofacial region.
Diagnostic tests conducted in order to measure the increment of active DENTAL CARIES over a period of time.
Extraoral body-section radiography depicting an entire maxilla, or both maxilla and mandible, on a single film.
The failure to retain teeth as a result of disease or injury.
Inflammation of the DENTAL PULP, usually due to bacterial infection in dental caries, tooth fracture, or other conditions causing exposure of the pulp to bacterial invasion. Chemical irritants, thermal factors, hyperemic changes, and other factors may also cause pulpitis.
Preventive dental services provided for students in primary and secondary schools.
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)
A prosthesis that gains its support, stability, and retention from a substructure that is implanted under the soft tissues of the basal seat of the device and is in contact with bone. (From Boucher's Clinical Dental Terminology, 4th ed)
One of the eight permanent teeth, two on either side in each jaw, between the canines (CUSPID) and the molars (MOLAR), serving for grinding and crushing food. The upper have two cusps (bicuspid) but the lower have one to three. (Jablonski, Dictionary of Dentistry, 1992, p822)
Secondary or systemic infections due to dissemination throughout the body of microorganisms whose primary focus of infection lies in the periodontal tissues.
The bonelike rigid connective tissue covering the root of a tooth from the cementoenamel junction to the apex and lining the apex of the root canal, also assisting in tooth support by serving as attachment structures for the periodontal ligament. (Jablonski, Dictionary of Dentistry, 1992)
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.
Financial support for training including both student stipends and loans and training grants to institutions.
Practice of adding fluoride to water for the purpose of preventing tooth decay and cavities.
The educational process of instructing.
A combination of the debris index and the dental calculus index to determine the status of oral hygiene.
The process of producing a form or impression made of metal or plaster using a mold.
A dental specialty concerned with the prevention and correction of dental and oral anomalies (malocclusion).
Substances used to create an impression, or negative reproduction, of the teeth and dental arches. These materials include dental plasters and cements, metallic oxide pastes, silicone base materials, or elastomeric materials.
Theoretical models which propose methods of learning or teaching as a basis or adjunct to changes in attitude or behavior. These educational interventions are usually applied in the fields of health and patient education but are not restricted to patient care.
Systematic identification, development, organization, or utilization of educational resources and the management of these processes. It is occasionally used also in a more limited sense to describe the use of equipment-oriented techniques or audiovisual aids in educational settings. (Thesaurus of ERIC Descriptors, December 1993, p132)
A treatment modality in endodontics concerned with the therapy of diseases of the dental pulp. For preparatory procedures, ROOT CANAL PREPARATION is available.
The emergence of a tooth from within its follicle in the ALVEOLAR PROCESS of the MAXILLA or MANDIBLE into the ORAL CAVITY. (Boucher's Clinical Dental Terminology, 4th ed)
A diet that contributes to the development and advancement of DENTAL CARIES.
The space in a tooth bounded by the dentin and containing the dental pulp. The portion of the cavity within the crown of the tooth is the pulp chamber; the portion within the root is the pulp canal or root canal.
Component of the NATIONAL INSTITUTES OF HEALTH. It seeks to improve oral, dental and craniofacial health through research, research training, and the dissemination of health information by conducting and supporting basic and clinical research. It was established in 1948 as the National Institute of Dental Research and re-named in 1998 as the National Institute of Dental and Craniofacial Research.
A thin protein film on the surface of DENTAL ENAMEL. It is widely believed to result from the selective adsorption of precursor proteins present in SALIVA onto tooth surfaces, and to reduce microbial adherence to the TEETH.
Dentifrices that are formulated into a paste form. They typically contain abrasives, HUMECTANTS; DETERGENTS; FLAVORING AGENTS; and CARIOSTATIC AGENTS.
Measurement of tooth characteristics.
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.
Female dentists.
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)
Preparatory education meeting the requirements for admission to dental school.
The process of repairing broken or worn parts of a PERMANENT DENTAL RESTORATION.
The collective tissues from which an entire tooth is formed, including the DENTAL SAC; ENAMEL ORGAN; and DENTAL PAPILLA. (From Jablonski, Dictionary of Dentistry, 1992)
The assessing of academic or educational achievement. It includes all aspects of testing and test construction.
Material from which the casting mold is made in the fabrication of gold or cobalt-chromium castings. (Boucher's Clinical Dental Terminology, 4th ed, p168)
Synthetic resins, containing an inert filler, that are widely used in dentistry.
Dental methods involving the use of DENTAL HIGH-SPEED EQUIPMENT.
The study of the teeth of early forms of life through fossil remains.
Fluorides, usually in pastes or gels, used for topical application to reduce the incidence of DENTAL CARIES.
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.
The proteins that are part of the dental enamel matrix.
Drugs intended for DENTISTRY.
Dental personnel practicing in hospitals.
Absence of teeth from a portion of the mandible and/or maxilla.
The process whereby calcium salts are deposited in the dental enamel. The process is normal in the development of bones and teeth. (Boucher's Clinical Dental Terminology, 4th ed, p43)
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)
The hardening or polymerization of bonding agents (DENTAL CEMENTS) via exposure to light.
Any change in the hue, color, or translucency of a tooth due to any cause. Restorative filling materials, drugs (both topical and systemic), pulpal necrosis, or hemorrhage may be responsible. (Jablonski, Dictionary of Dentistry, 1992, p253)
Practice of a health profession by an individual, offering services on a person-to-person basis, as opposed to group or partnership practice.
Congenital absence of the teeth; it may involve all (total anodontia) or only some of the teeth (partial anodontia, hypodontia), and both the deciduous and the permanent dentition, or only teeth of the permanent dentition. (Dorland, 27th ed)
Inflammation of gum tissue (GINGIVA) without loss of connective tissue.
Loss of the tooth substance by chemical or mechanical processes
An appliance used as an artificial or prosthetic replacement for missing teeth and adjacent tissues. It does not include CROWNS; DENTAL ABUTMENTS; nor TOOTH, ARTIFICIAL.
Content, management, editing, policies, and printing of dental periodicals such as journals, newsletters, tabloids, and bulletins.
A branch of dentistry dealing with diseases of the oral and paraoral structures and the oral management of systemic diseases. (Hall, What is Oral Medicine, Anyway? Clinical Update: National Naval Dental Center, March 1991, p7-8)
Predetermined sets of questions used to collect data - clinical data, social status, occupational group, etc. The term is often applied to a self-completed survey instrument.
A partial denture attached to prepared natural teeth, roots, or implants by cementation.

The laser welding technique applied to the non precious dental alloys procedure and results. (1/25)

AIM: The laser welding technique was chosen for its versatility in the repair of dental metal prosthesis. The aim of this research is to assess the accuracy, quality and reproducibility of this technique as applied to Ni-Cr-Mo and Cr-Co-Mo alloys often used to make prosthesis METHOD: The alloy's ability to weld was evaluated with a pulsed Nd-Yag Laser equipment. In order to evaluate the joining, various cast wires with different diameters were used. The efficiency of the joining was measured with tensile tests. In order to understand this difference, metallographic examinations and X-Ray microprobe analysis were performed through the welded area and compared with the cast part. RESULTS: It was found that a very slight change in the chemistry of the Ni-Cr alloys had a strong influence on the quality of the joining. The Co-Cr alloy presented an excellent weldability. A very important change in the microstructure due to the effect of the laser was pointed out in the welding zone, increasing its micro-hardness. CONCLUSION: The higher level of carbon and boron in one of the two Ni-Cr was found to be responsible for its poor welding ability. However for the others, the maximum depth of welding was found to be around 2mm which is one of the usual thicknesses of the components which have to be repaired.  (+info)

Development of a new investment for high-frequency induction soldering. (2/25)

This study developed a new investment for induction soldering using high frequency induction heating. Ninety-five mass% magnesia clinker and 5 mass% dental stone were selected for the main constituents. The magnesia investment itself was scarcely affected by induction heating, so the addition of metal powders such as Fe, Ni, Co were investigated. Among these three powders, the addition of 10 mass% cobalt powder was most effective. This investment needed only 40 seconds of high frequency induction heating to go from room temperature to 900 degrees C without preheating. Thermal expansion of this investment in a vacuum atmosphere was 1.25% at 1000 degrees C. Dimensional changes during induction soldering were measured using German-silver and silver solder. When the new magnesia investment containing 10 mass% Co powder was used, the dimensional change was -0.2%. This contraction was less than when a magnesia investment without metal additives was used.  (+info)

Metallurgical effects on titanium by laser welding on dental stone. (3/25)

It is not known for certain that dental stone components influence titanium welding. In this study, we investigated metallurgical problems caused by laser welding on dental stones using wrought commercial pure (CP) titanium. A pulsed Nd:YAG laser irradiated a number of specimens' surfaces which were fixed on either a dental hard stone or a titanium plate. The metallurgical properties of the weld were evaluated using the Vickers hardness test, microstructure observation, fractured surface observation and quantitative analysis of oxygen and hydrogen. In the weld formed on the dental stone there was an increase in hardness, the existence of an acicular structure and a brittle fractured surface, and an increase in the oxygen and hydrogen concentrations compared with base metal. In the weld formed on the titanium plate, these changes were not observed. Therefore, it was demonstrated that laser welding on dental stones made the welds brittle.  (+info)

Distortion of laser welded titanium plates. (4/25)

The distortion of laser welded titanium plates was assessed for different operating conditions of the laser welding device, and with different welding parameters (in terms of weld point and prewelding). In this study, Nd : YAG laser welding device was used to join the titanium plates. The results showed that distortion increased stepwise after each welding point along the welding zone (one-side welding), but decreased consecutively as the welding proceeded on the second side of the weld (two-side welding). In the case of one-side welding, the dependence of distortion on current and spot diameter presented maxima--due to changes in the welding pool characteristics. For two-side weld the same parameters exercised little influence on its distortion recovery, due to the effect of solidified weld pools from the first side. Current and spot diameter determined the weld pool, which in turn regulated distortion based on shrinkage. Four-point prewelding significantly decreased the final distortion for both one- and two-side welds. Alternating two-side welding of prewelded assembly showed lower distortion than a classic two-side weld.  (+info)

Flexural strength of pure Ti, Ni-Cr and Co-Cr alloys submitted to Nd:YAG laser or TIG welding. (5/25)

Welding of metals and alloys is important to Dentistry for fabrication of dental prostheses. Several methods of soldering metals and alloys are currently used. The purpose of this study was to assess, using the flexural strength testing, the efficacy of two processes Nd:YAG laser and TIG (tungsten inert gas) for welding of pure Ti, Co-Cr and Ni-Cr alloys. Sixty cylindrical specimens were prepared (20 of each material), bisected and welded using different techniques. Four groups were formed (n=15). I: Nd:YAG laser welding; II- Nd:YAG laser welding using a filling material; III- TIG welding and IV (control): no welding (intact specimens). The specimens were tested in flexural strength and the results were analyzed statistically by one-way ANOVA. There was significant differences (p<0.001) among the non-welded materials, the Co-Cr alloy being the most resistant to deflection. Comparing the welding processes, significant differences (p<0.001) where found between TIG and laser welding and also between laser alone and laser plus filling material. In conclusion, TIG welding yielded higher flexural strength means than Nd:YAG laser welding for the tested Ti, Co-Cr and Ni-Cr alloys.  (+info)

In vitro toxicity evaluation of silver soldering, electrical resistance, and laser welding of orthodontic wires. (6/25)

The long-term effects of orthodontic appliances in the oral environment and the subsequent leaching of metals are relatively unknown. A method for determining the effects of various types of soldering and welding, both of which in turn could lead to leaching of metal ions, on the growth of osteoblasts, fibroblasts, and oral keratinocytes in vitro, is proposed. The effects of cell behaviour of metal wires on osteoblast differentiation, expressed by alkaline phosphatase (ALP) activity; on fibroblast proliferation, assayed by the 3-(4,5-dimethylthiazol-2-yl)-5-(3-carboxymethoxyphenyl)-2-(4-sulphophenil)-2H-tet razolium-phenazine ethosulphate method; and on keratinocyte viability and migration on the wires, observed by scanning electron microscopy (SEM), were tested. Two types of commercially available wires normally used for orthodontic appliances, with a similar chemical composition (iron, carbon, silicon, chromium, molybdenum, phosphorus, sulphur, vanadium, and nitrogen) but differing in nickel and manganese content, were examined, as well as the joints obtained by electrical resistance welding, traditional soldering, and laser welding. Nickel and chromium, known as possible toxic metals, were also examined using pure nickel- and chromium-plated titanium wires. Segments of each wire, cut into different lengths, were added to each well in which the cells were grown to confluence. The high nickel and chromium content of orthodontic wires damaged both osteoblasts and fibroblasts, but did not affect keratinocytes. Chromium strongly affected fibroblast growth. The joint produced by electrical resistance welding was well tolerated by both osteoblasts and fibroblasts, whereas traditional soldering caused a significant (P < 0.05) decrease in both osteoblast ALP activity and fibroblast viability, and prevented the growth of keratinocytes in vitro. Laser welding was the only joining process well tolerated by all tested cells.  (+info)

Accuracy of temporary laser welding of FPDs by Nd:YAG laser in the oral cavity. (7/25)

The purpose of this study was to investigate the accuracy of temporary fixation with laser welding for fixed partial dentures (FPDs). Five kinds of experimental FPD with different welding/soldering gaps were fabricated (0, 20, 50 microm for welding; 300 microm for soldering). Then, FPDs were temporary-fixed by laser welding or with a self-curing resin. Fixation accuracy was evaluated by the change in distance and the angular deformation between two retainers. The change in distance and the angular deformation between two retainers of the FPD without welding/soldering gap were significantly larger than the other FPDs (p<0.05). With due consideration to the displacement of teeth or implants especially in the mesiodistal direction, and by taking into account the inevitable errors of the indirect method, it seemed reasonable to provide a welding space of approximately 20 microm.  (+info)

Effects of welding pulse energy and fluoride ion on the cracking susceptibility and fatigue behavior of Nd:YAG laser-welded cast titanium joints. (8/25)

In this study, the cracking susceptibility and fatigue behavior of Nd:YAG laser-welded cast Ti joints (welding pulse energy: 11, 15, and 18 J) in fluoride-containing (0 and 0.5% NaF) artificial saliva were evaluated using constant elongation rate test (CERT) and fatigue test (FT), respectively. Both CERT and FT were also carried out in open air as controls. Results showed that increasing the welding energy increased the elongation and fatigue life, but decreased the tensile strength, of cast Ti joints in open-air environment. With a welding energy of 11 J, the fluoride ions in the artificial saliva increased the cracking susceptibility and decreased the fatigue life of Ti joints. When the welding energy exceeded 15 J, the presence of fluoride ions still increased the cracking susceptibility, but did not reduce the fatigue life of Ti joints. Rupture of Ti joints--if it occurred--occurred only at the welded metal (versus the non-welded part).  (+info)

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With its newly purchased 150-sq.-ft. vault for x-ray inspection of large weldments, laser job shop Laser Machining, Inc., Somerset, WI, has enhanced its nondestructive-testing capabilities. The firm uses x-ray inspection to characterize weld penetration, joint alignment and defect detection in laser-welded parts, including components for trucks, drive trains and gas turbines. The added x-ray inspection capabilities complements LMIs existing ability to perform ultrasonic, magnetic-particle and liquid-penetrant testing. LMI operates high-power 6- and 12-kW CO2 lasers and a 3-kW YAG laser. Learn more about LMIs capabilities at ...
Aluminium fins by Indian company Maharaja Techno Chromes: According to the manufacturer, the laser-welded fins are nearly 60 % less expensive than copper ones and market acceptance is satisfying. Efficiency is certainly still a bit lower. Photo: Jaideep Malaviya
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Air Products shielding gases give better weld results. For better weld quality and faster welding speeds, rely on Maxx® welding gases and Integra® cylinder
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Offline programming requires an accurate representation of the work cell to be created in order to minimise the modification required to a generated program. Verbotics Weld typically expects and error of around 5mm between the theoretical kinematics of the system and the real-world system.. This document outlines some measurements that can be completed with the robot system to determine the main calibration parameters required for your system. Using this information, Verbotics can provide an assessment of the suitability for you welding system to be programmed using Verbotics Weld. Verbotics can also provide calibration services where required. These can be quoted upon request.. Pictures of the teach pendant can be used for the purpose of recording this information:. ...
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WELD COUNTY, Colo. - A domestic cat in rural northwest Weld County that become sick in early June has tested positive for plague, officials said Wednesday. The cat is getting treatment and is expected to recover. A person who cares for the cat is also getting preventative antibiotics. People most commonly contract plague from the […]
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Topographic inspection as a method of weld joint diagnostic. . Biblioteca virtual para leer y descargar libros, documentos, trabajos y tesis universitarias en PDF. Material universiario, documentación y tareas realizadas por universitarios en nuestra biblioteca. Para descargar gratis y para leer online.
Mechanical Engineering Assignment Help, Resistance spot welding, Resistance Spot Welding In this process, a spot of weld is made between overlapping sheets by means of two cylindrical copper alloy electrodes, one on top and the other at the bottom, which carry a high current. The electrodes also clamp the work
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A butt weld pipe fitting is designed to be welded on site at its end to connect pipe together and allow change in direction or pipe diameter, or branching or ending.
A battery unit comprising a battery (2), and a battery encapsulation (3), comprising first and second encapsulation parts (4, 5) joined by a weld along a weld zone (14), the battery (2) being located in the encapsulation (3). The battery (2) comprises a recess (11) extending along the weld zone (14), such that a heat insulating space (12) is formed between the battery (2) and the encapsulation (3) along the weld zone (14).
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In the present study, bead-on-plate specimens of 1-mm sheets of austenitic and duplex stainless steels were fabricated by laser penetration welding with a 2.5-kW CW Nd:YAG laser. The galvanic corrosion behavior of laser-weldment (LW) against as-received (AR) specimens with an area rato of 1:1 in 3.5% NaCL solution was studied by means of a zero-resistance ammeter. The free corrosion potentials of as-received specimens were found to be considerably higher than those of laser weldments, indicating that the weldments are more active and always act as anodes. The ranking of galvanic current densities (IG) of the couples in ascending order is: AR S31603-LW S31603 , AR S31803-LW S31803 , AR S32760-LW S32760 , AR S30400-LW S30400. For the galvanic couple between AR S30400 and LW S30400, the IG is the highest (78.6 nA/cm2) because large amount of δ-ferrite in the weld zone acts as active sites. On the other hand, the IG of the galvanic couple between AR S31603 and LW S31603 is the lowest (-26 nA/cm2) ...
Our family hobby was rock hunting, says Ron Wold, who grew up in Beaverton and majored in geology at Amherst. He got a masters degree at the University of Montana, then came to Eugene to pursue a Ph.D. After two years, I got a job as a geologist with the Bureau of Land Management, says Wold, who eventually became a realty specialist in the agencys Eugene office. I managed right-of-way agreements on 320,000 acres. After 30 years of service, he retired in 2004 at age 56. Though he knew at an early age that he was attracted to men, Wold took a conventional path, married a hometown Oregon girl and had a son, Eric. The marriage lasted five years. Two years later, he met Ken Hinds, an RN at Sacred Heart. Weve been together 36 years next month, he notes. He helped raise my son. Wold became active in politics shortly after retirement, in the failed 2004 effort to defeat Measure 36, banning gay marriage. He took part in the 2008 and 2012 Obama campaigns with his own personal project, a ...
It has long been non-destructively evaluated on weld joints of various pipes which are indispensable to most of industrial structures. Ultrasound evaluation has been used to detect flaws in welding joints, but some technical deficiencies still remain. Especially, ultrasound imaging on weld of elbow pipes has many challenging issues due to varying surface along circumferential direction. Conventional ultrasound imaging has particularly focused on ultrasonic wave propagation based on ray theory. This confines the incident angle and the position of an array transducer as well. Total focusing method (TFM), however, can provide not only high resolution images but also flexibility that enables to use ultrasonic waves to every direction that they can reach. This leads us to develop a method to get images of weld zone from an elbow part that curves. It is inevitable of each ultrasonic wave from the array transducer to transmit through different media and to be reflected from the boundary with angles ...
Rachel was in good condition Monday afternoon at Childrens Hospital.Zeller said Sauter was driving his 2000 Dodge pickup north on Weld County Road 63 and collided with a 1991 Chevrolet driven by the unidentified victim. After the collision, the vehicles both rolled, and the Chevrolet caught fire.. The driver of the Chevrolet was found a few feet from the pickup, severely burned. It isnt known if the victim was thrown from the pickup or crawled out. The Sauters were both wearing seat belts. Alcohol is not suspected as a factor in the crash.. The unidentified driver is the 55th person to die on Weld County roads this year, compared to 56 on this date a year ago. Since Thursday, two others have died in Weld County crashes:n Lee Benson, 51, of Eaton died Saturday afternoon of injuries he sustained Thursday when the tractor he was driving on Colo. 392 west of Lucerne was hit by another vehicle.. n Christa Navarro, 17, of St. Francis, Kan., died Sunday morning at the intersection of U.S. 34 and ...
Materials have gotten stronger, but welds havent. We can design metals with intricate microstructures, but we destroy the microstructure when we weld, he said.. With our method, materials are shaped and bonded together at the same time, and they actually get stronger.. Daehn explained the new process in a keynote address at the Materials Science & Technology 2015 meeting recently in Columbus.. In a common technique called resistance spot welding, manufacturers pass a high electrical current through pieces of metal, so that the metals natural electrical resistance generates heat that partially melts them together and forms a weld. The drawbacks: generating high currents consumes a lot of energy, and the melted portions of metal are never as strong afterward as they were before.. Over the last decade, Daehn and his team have been trying to find ways around those problems. Theyve amassed more than half a dozen patents on a system called vaporized foil actuator (VFA) welding.. In VFA, a ...
Ethel Welds active research areas include: 1) hands-on patient-oriented pharmacokinetic drug development studies related to topical microbicides for HIV pre-exposure prophylaxis (PrEP), 2) multicompartmental pharmacokinetic analyses of novel long-acting parenteral antiretroviral cabotegravir, 3) investigation of feasibility, safety, and acceptability to youth of long-acting parenteral antiretroviral formulations, and 4) the development of safety and dose-finding studies of novel medications for MDR TB in children. She has three years post-fellowship experience serving as PI and site PI of clinical research studies. Her primary research focus is to improve options for the treatment and prevention of HIV and MDR-TB, particularly in children and youth, and involve and investigate the safety, PK, and efficacy of less frequent dosing strategies as a method of adherence support. Dr. Weld is the Protocol Chair of IMPAACT 2005 (a study of the PK, safety, and tolerability of the novel nitroimidazole ...
A system and method have been provided for removing high lead content solder balls from the surface of a circuit package for the purpose of rework. The invention is applicable to ball grid array (BGA), C4 balls, chip scale balls, and flip chip bumps. Advantageously, the room temperature solder ball rework procedure minimizes damage to the circuit package. Specifically, a thin-film stainless steel mask with openings to expose the solder balls, is formed over the circuit package, and the solder balls are removed in a shearing or grinding operation, leaving a solder ball residue. Then, a conventional thick mask film is formed and a solder paste is deposited to fill the apertures. The solder ball residue forms a wettable surface for the low temperature attachment of new solder balls.
A canopy seal clamp assembly (40) for stopping leaking in a canopy seal weld (42) located between a nuclear reactor vessel nozzle (30) and an elongated housing (24) includes an upper plate (44) having a central aperture (50) and an inner flange (52) spaced apart from a lower plate (60) having a central aperture (66) and an inner flange (68), a seal carrier (70) located adjacent the lower plate carriers a seal (72) for contacting an outer surface of a leaking weld (42) and connector (56) between the upper and lower plate maintain a compressive load to tightly seal the leaking weld and the compressive load tends to close and arrest further crack propagation in the weld. A method for repairing a weld is also described.
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Researchers from UC San Diego and UC Riverside discovered ceramics could be weld at room temperature using ultrafast pulsed lasers.
How to Mig Weld Aluminum. 05/08/19Metal inert gas (MIG) welding uses a consumable wire electrode and shielding gas, which is continuously fed through a welding gun. Aluminum requires some specific changes for welders who are accustomed to...
This is a basic guide on how to weld using a metal inert gas (MIG) welder. MIG welding is the awesome process of using electricity to melt and join pieces of metal...
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Tips for Choosing the Best Weld Cable to Purchase for Installation from the Best Distributor. Cables are one of the best products that you need electrical services, you have to find the best distributors with the best quality supplies for installation. The resistant weld cables are the best to install in your electrical system, find the best contractor to hire quality service delivery to ensure the best performance in your system. The cables products have the electrons that help in transmitting electric energy, you have to choose the best to install in your system for the best high peak performance for maximum power transmission. It is challenging to choose the best cable products to use for installation services in your electric system; you have to make sure that you find the right one. In this article, there are tips for choosing the best weld cable to purchase for installation from the best distributor this includes.. The quality of weld cable is one thing to consider. You have to use the ...
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0050] When the solder balls 3 of the socket connector 100 are melted and soldered to the conductive pads 71 of the substrate 7 through a reflowing process, the flux 8 can effectively and thoroughly clean and remove an oxidized layer on the tortuous portion 25 during the reflowing process. Bearing in mind that the second bent section 252 is completely covered with the pre-coated flux 8, it is very similar to being covered with a flux sock, as shown in FIG. 9. That is to say, the inner surface 261, the outer surface 262 and the pair of side surfaces 263 of the second bent section 252 are all covered with the pre-coated flux 8. As a result, when the solder ball 3 is heated to a molten temperature, firstly, from a viewpoint of fluid dynamics, the second bent section 252 will incise into the molten solder ball 3 resulted from a relief of its pre-stress as the second bent section 252 is pushed backward by the solder ball 3. Secondly, since the second bent section 252 is coated with the solder affinity ...
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Back-step welding involves depositing short adjacent weld lengths in the opposite direction to the general progression (Fig.1a).. Skip welding is laying short weld lengths in a predetermined, evenly spaced, sequence along the seam (Fig.1b). Weld lengths and the spaces between them are generally equal to the natural run-out length of one electrode. The direction of deposit for each electrode is the same, but it is not necessary for the welding direction to be opposite to the direction of general progression.. For more information on the control of distortion, see Job Knowledge for Welders 36.. ...
IPG Wobble and Seam Tracking welding head adaptor integrates two technologies in one compact module. The module allows simultaneous laser beam wobbling and welding seam tracking. Wobbling the laser beam improves weld quality and finish, and the seam tracker enables automatic adjustment of welding head lateral position when the seam location varies. IPG Welding heads with wobble functionality deliver unmatched weld quality even on highly reflective materials. Ideal for bridging gaps without filler material, IPG Wobble Heads provides stunning visual finish and weld consistency throughout the seam. The module is plug and play compatible with IPG D50 high power welding head.
Today we will learn about diffusion bonding principle, working, application, advantages and disadvantages. Diffusion bonding is a solid state welding process in which, no liquid or fusion phase involves and the weld joint is form in pure solid state. It does not melt the welding material and mostly a little plastic deformation takes place at interface surface and weld is form due to inter-molecular diffusion. This bonding process conducted in vacuum or in inert environment to reduce oxidation. This is widely used to join refectory materials in aerospace and nuclear industries. This type of welding can be used to weld both similar and dissimilar materials with the help of high pressure and temperature ...
Chapter 2 Theory on Mechanics of Solder Materials Abstract Chapter 2 reviews the fundamental theory on mechanics of solder materials. As solder materials are...
when does a subpanel need a ground rod, 2. Preparation of Ground Rods a. Ground rod ends that have been mushroomed by driving must be cut off as they will hold the mold open and cause leakage during the welding procedure. b. Ground rod must be clean, shiny and dry to help ensure a good weld. c. Corrosion must be removed as it may cause porosity in the weld. d. Ground rod splices ...
Microstructural Development in Friction Stir Welding R.W. Fonda,1 J.F. Bingert,2 and K.J. Colligan3 1 Materials Science and Technology Division 2 Los Alamos National Laboratory 3 Concurrent Technologies Corporation Introduction: Friction stir welding (FSW) is a relatively new technique for joining metals. It uses a rotating tool to deform (stir) the surrounding material together without any melting (Fig. 8). Although FSW was only developed in 1991,1 it is already experiencing a rapid growth in applications because of its ability to consistently produce high quality welds with low distortion, even in materials considered unweldable by conventional techniques. In addition, the accompanying reductions in weld inspection and re-weld procedures can also provide significant cost benefits. However, despite this considerable interest in FSW, the microstructural evolutions occurring during FSW are still not well understood. Conventional studies typically examine only sections of the deposited weld, ...
PROPOSED METHOD. The scarcity of skilled welders means that the development of additional factors, which will allow for variable artisan skills, should be possible. The objective of this study is therefore to develop a table of weld resistance factors, classified according to the grade of the welder. This is done to incorporate different skills into the design procedure, allowing the engineer freedom to assess the availability of welding skills and to specify connection details accordingly. Welders were classified into five groups, with Grades 1 and 5 being the lowest and highest grades respectively. These grades are a function of the training and experience of the welder. Welders in different grades will achieve different weld qualities and strengths. This subject is relevant to conditions in South Africa today when it may be desired to use welders who are below the standard normally required. The purpose of this research is therefore to determine what adjustments, if any, should be made to the ...
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The mass production paradigm strives for uniformity, and for assembly operations to be identical for each individual product. To accommodate geometric variation between individual parts in such a process, tolerances are introduced into the design. However, for certain assembly operations this method can yield suboptimal quality. For instance, in welded assemblies, geometric variation in ingoing parts can significantly impair quality. When parts misalign in interfaces, excessive clamping force must be applied, resulting in additional residual stresses in the welded assemblies. This problem may not always be cost-effective to address simply by tightening tolerances. Therefore, under new paradigm of mass customization, the manufacturing approach can be adapted on an individual level. Since parts in welded assemblies are not easily disassembled and reused, interchangeability is not a relevant concern. This recognition means that each welded assembly can be adapted individually for the specific
The mass production paradigm strives for uniformity, and for assembly operations to be identical for each individual product. To accommodate geometric variation between individual parts in such a process, tolerances are introduced into the design. However, for certain assembly operations this method can yield suboptimal quality. For instance, in welded assemblies, geometric variation in ingoing parts can significantly impair quality. When parts misalign in interfaces, excessive clamping force must be applied, resulting in additional residual stresses in the welded assemblies. This problem may not always be cost-effective to address simply by tightening tolerances. Therefore, under new paradigm of mass customization, the manufacturing approach can be adapted on an individual level. Since parts in welded assemblies are not easily disassembled and reused, interchangeability is not a relevant concern. This recognition means that each welded assembly can be adapted individually for the specific
Stick welding porosity in a weld is considered poor quality. Porosity may or may not be visible to the naked eye but can occasionally be found in the face of the weld.
Stator hairpin welding can introduce significant challenges causing defects that can break a circuit and make the entire stator nonfunctional.
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Vitals, a website that helps patients find doctors, asked users whether they had received a flu shot in the last 12 months. Of 1,678 respondents, 818 responded that they had not. Chief of pediatric infectious diseases and vice chairman Leonard Krilov at Winthrop University Hospital in Mineola, N.Y., said unfounded skepticism of the shot accounted for the large number of people who had not received it, skepticism based on the belief among some that the vaccine can cause flu due to some of its side effects.. The standard flu shot is not live, Krilov said. You may get a little pain at the injection site, but you cannot get the flu from the vaccine.. According to the CDC, between 3,000 and 49,000 people die from the flu each year.. ...
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GPK Products Inc. has, since 1972, built our reputation of superior customer service through engineering and product excellence. We have developed over 4100 molded and fabricated fittings, cataloged in sizes through 54 for nearly every field application ...
The Searle Scholars Program makes grants to selected universities and research centers to support the independent research of exceptional young faculty in the biomedical sciences and chemistry.
The welding wire can be melted and transferred to the base metal as droplets in three different modes:. (1)short−circuiting transfer, (2) Globule transfer and (3) Spray transfer.. Depending upon the mode, the appearance and shape of weld bead, quantity of spatter, and penetration can vary.. In CO2 (MAG) arc welding, the short−circuiting transfer and the globule transfer can be observed.. (1) Short−circuiting transfer:. The welding method that uses the short−circuiting transfer is called the Short Arc Welding or the Dip Transfer Welding. When a comparatively low welding current (200A or lower) is used in either CO2 (MAG) arc welding or MIG welding, the droplet transfers to the base metal after short circuiting with it, as shown in Fig. 2. It is suited for welding of thin plates, sheet metals and in all−position welding including vertical up, vertical down and overhead welding.. ...
Physiotherapy is an evidence-based profession that evaluates and evolves practice using the latest scientific data. These strengths will allow us to meet the needs of increasing demand, changing demographics, and an evolving health system. Our ongoing attention to our strengths means that our profession will continue to be a highly-respected, highly-sought service for
In 1841, he gained notoriety for developing a new process to solder false teeth onto gold plates. In 1842, he left college ... William found work as a clerk, printer, and salesman in Boston before entering Baltimore College of Dental Surgery in 1840. ... "Wimmiam McLintock Morton, T.D., L.D.S". British Dental Journal. 146 (4): 128. 1979. doi:10.1038/sj.bdj.4804211. PMID 367405. ... Deranian H. M. (1997). "The great Morton-Jackson debate". Journal of the Massachusetts Dental Society. 46 (2): 24-5. PMID ...
The Dental Manufacturing Company in London also sold Watkin Pliers. In the 1930s, the invention of the spot welder by Watkin ... allowed a much greater success rate when soldering fine wires, especially, steel. Elliot's of Liverpool produced the welder ... He worked as a general dental with special interest was orthodontics. In 1921, he became a member of the British Society for ... In 1914, Watkin came to Liverpool where he studied at the Liverpool School of Dental Surgery and qualified in 1918. Then until ...
Dental bridges offer several advantages. They can usually be completed in only two dental appointments, restore the tooth back ... This can then be sent to the lab where the two pieces will be soldered and returned for another try-in or final cementation. ... WorkNC Dental machining video, "Dental Bridge implant CNC Machining 5 axis" PATTERN RESIN™ LS Self-Curing, Acrylic Die Material ... A bridge is a fixed dental restoration (a fixed dental prosthesis) used to replace one or more missing teeth by joining an ...
The tips are stripped of their Teflon coating, and the ones farthest from the cone are soldered and then sealed with dental ...
Didactic Modules included Anatomy and Physiology, Basic Soldering, AC/DC theory and Ohm's Law, electron theory, Transistor ... Theory, Digital Circuits, Basic Troubleshooting, Dental and Pneumatic Devices, heating and cooling, Sterilizers and Ultrasonic ...
... molds for development of prosthesis and dental molds. Other commercially produced compositions include Solder 174: 26 wt% of In ... It easily oxidizes, enables soldering for cryogenic applications, and allows soldering of nonmetals. It facilitates the ... Another alloy also on the market is the solder 117, composed of 44.7 wt% of Bi, 22.60 wt% of Pb, 19 wt% of In, 8.30 wt% of Sn, ... There is, on the market a solder composed by 49 wt% of Bi, 21 wt% of In, 18 wt% of Pb, and 12 wt% of Sn, called commercially ...
Such undercuts can be bilaterally added to the most posterior dental abutments by bonding a bulk of composite resin to the ... Alternatively, custom bent wrought wire clasps can be soldered to the cast metallic alloy component of the definitive palatal ... If the orthodontic wire clasp terminated at its approximation with the dental abutment undercut it engages as do conventional ... An interim palatal lift prosthesis carries a current dental terminology code number of D5958. A definitive palatal lift ...
Gallium alloys are used mostly for dental purposes. Gallium ammonium chloride is used for the leads in transistors. A major ... goes into alloys and solders; a similar amount is used in electrical components and in semiconductors; and the final 6% goes to ...
Edinburgh Dental Dispensary which aimed to provide clinical instruction for dental students and at the same time give dental ... Nasmyth of Edinburgh... to have metal caps fitted to the teeth of the upper and lower jaws soldered or riveted together at ... In 1839, he gave a paper on the dental enamel cuticle since known as Nasmyth's membrane. He was elected a foundation Fellow of ... "Edinburgh Dental Hospital and School history". University of Edinburgh. Retrieved 30 March 2019. Cooke, A.M. (1982). "Queen ...
An archwire in orthodontics is a wire conforming to the alveolar or dental arch that can be used with dental braces as a source ... They also had better formability and can be readily used to be soldered and welded for fabrication of complex orthodontic ... An archwire can also be used to maintain existing dental positions; in this case it has a retentive purpose. Orthodontic ... Sachdeva R (July 2002). "Sure-Smile: technology-driven solution for orthodontics". Texas Dental Journal. 119 (7): 608-15. PMID ...
Ultrasonics are used for industrial cleaning, and also used in many medical and dental techniques and industrial processes. ... Ultrasonic cleaning is used widely to remove flux residue from soldered circuit boards. However, some electronic components, ... dental and surgical instruments, tools, coins, fountain pens, golf clubs, fishing reels, window blinds, firearm components, car ... Safety standards and infection control for dental hygienists. Albany, NY: Delmar Thomson Learning. p. 129. ISBN 0766826600. ...
Dental amalgams, which are alloys of intermetallics Ag3Sn and Cu3Sn ... The management of intermetallics is a major issue in the reliability of solder joints between electronic components. ...
... dental wax; disinfectants; preparations for destroying vermin; fungicides, herbicides Class 6 Common metals and their alloys, ... tempering and soldering preparations; chemical substances for preserving foodstuffs; tanning substances; adhesives used in ... dental and veterinary apparatus and instruments; artificial limbs, eyes and teeth; orthopaedic articles; suture materials; ...
The management of intermetallics is a major issue in the reliability of solder joints between electronic components. ... Ni3Al Dental amalgams, which are alloys of intermetallics Ag3Sn and Cu3Sn Gate contact/ barrier layer for microelectronics e.g ...
... dental wax; disinfectants; preparation for destroying vermin; fungicides, herbicides Class 6. Common metals and their alloys; ... tempering and soldering preparations; chemical substances for preserving foodstuffs; tanning substances; adhesive used in ... dental and veterinary apparatus and instruments, artificial limbs, eyes and teeth; orthopaedic articles; suture materials Class ...
Dentistry: crocodile clips are often used on the ends of a cord in dental offices to attach a protective bib over the patient's ... Hobby: crocodile clips can be used as miniature clamps to hold parts together for gluing or soldering (e.g., Helping hands tool ... Electronics: useful as a heat sink while soldering heat-sensitive devices. A Kelvin clip is a special form of crocodile clip. ... When manufactured for electronics testing and evaluation, one jaw of the clip is typically permanently crimped or soldered to a ...
Other more common sources can be found in silver dental fillings, fluorescent bulbs. High mercury exposure results in permanent ... acute exposure have occurred among welders who have unsuspectingly welded on cadmium-containing alloys or with silver solders. ...
Cassiterite is the chief ore needed to produce tin, essential for the production of tin cans and the solder on the circuit ... Gold is used in jewelry, investments, electronics, and dental products. It is also present in some chemical compounds used in ...
In this way it is possible to reshape the whole dental arch if molars are connected to the other teeth by means of a buccal ... The wire can be soldered to the bands or inserted into lingual sheaths welded to the molar band (removable LLA and TPA). LLA is ... A lingual arch is an orthodontic device which connects two molars in the upper or lower dental arch. The lower lingual arch ( ...
Cryotips are made of two stainless steel hypodermic-needle tubes, such as 18 gauge tube surrounding a 24 gauge tube, soldered ... Head restraint is unnecessary because the loops are chronically implanted and secured to the skull by screws and dental acrylic ... are sealed using dental acrylic. After implantation, when the animal is not participating in an experiment, a protective cap is ...
Pursuant to that agreement, Palloys Refining Co changed the focus of its business to the casting of jewellery and dental ... solders; milled wedding rings; and precious metal refining services. It did so through a joint venture agreement with Bullion ... Palloys Refining Co's business was solely related to the refining of precious metals sourced from the jewellery and dental ...
"Effect of Admixed Indium on Mercury Vapor Release from Dental Amalgam". Journal of Dental Research. 68 (8): 1231-3. CiteSeerX ... It is most notably used in the semiconductor industry, in low-melting-point metal alloys such as solders, in soft-metal high- ... New uses were found in fusible alloys, solders, and electronics. In the 1950s, tiny beads of indium were used for the emitters ... Indium is added to some dental amalgam alloys to decrease the surface tension of the mercury and allow for less mercury and ...
n, t, d, s, z, l/ could have been either dental [n̪, t̪, d̪, s̪, z̪, l̪] or alveolar [n͇, t͇, d͇, s͇, z͇, l͇]. */n/ had a velar ... E.g. donre , donder, solre , solder, bunre , bunder. In modern Dutch, this change has become grammaticalised for the -er ( ... Dental fricatives become stops: /ð/ , /d/, /θ/ , /t/, merging with existing /t/ and /d/. (around 12th century) *The geminate / ... and before /l/, /n/, /s/, /x/ + dental,. Rhinelandic[edit]. Rhinelandic ("Kleverlands") was spoken around the area of the Duchy ...
Dental descaler systems - Measurement and declaration of the output characteristics IEC TS 61206 Ultrasonics - Continuous-wave ... Environmental and endurance test methods for surface mount solder joint IEC 62138 Nuclear power plants - Instrumentation and ... Attachment materials for electronic assembly IEC 61191 Printed board assemblies IEC 61192 Workmanship requirements for soldered ...
He was also given a ring, made using gold from dental work taken out of the mouth of Schindlerjude Simon Jeret. The ring was ... and Emilie Schindler waited while an engineer from the factory opened the cars using a soldering iron. Twelve people were dead ...
To do simple repairs on electronic gear, a guitar tech may have to know how to use a soldering iron and a multitester, and how ... and there may not be health or dental benefits. A guitar tech working for this type of band must find other work to fill in ... broken electrical connectors or solder joints, speaker voice coils damaged from the previous concert, or equipment damaged ... and electronics technicians who solder and repair connections and wiring. The salary, benefits, and accommodations of guitar ...
It is still used as an ingredient in dental amalgams. In the late 20th century the largest use of mercury was in the mercury ... Other widely used alloys that contain zinc include nickel silver, typewriter metal, soft and aluminium solder, and commercial ... Cadmium is used in many kinds of solder and bearing alloys, due to a low coefficient of friction and fatigue resistance. It is ...
In 1930, he graduated in oral and dental surgery at Columbia. Ferber practiced dentistry and taught part-time at the Columbia ... Ferber's best-known sculptures are open, hollow forms in soldered and welded metal. While abstract, their titles and spiky ... In 1945, Ferber began experimenting in steel-reinforced concrete, abstract sculpture, and metal-soldering. Starting in 1946, he ... and a steel sculpture for the American Dental Association Building in Chicago. According to the Herbert Ferber Estate, ...
To prevent the side-effect of molar tipping, he modified the appliance by taking the bow and soldering it to the inner arch of ... He graduated at the age of 16 and attended Marquette University School of Dentistry, where he obtained his dental degree in ...
Surface Modifications of Dental Ceramic Implants with Different Glass Solder Matrices: In Vitro Analyses with Human Primary ... The authors also thank Dental Creativ Management GmbH (Rostock, Germany) for supplying the glass solders, Metoxit AG (Thayngen ... ATZ with glass solder matrix S1, and (d) ATZ with glass solder matrix S2. Living cells are displayed in green and dead ones in ... The glass solder matrices S1 and S2 did not differ significantly in average surface roughness (. ). The mean roughness index, ...
Competitively Priced Dental Instruments, Tools, Dental Chairs, Autoclave Sterilizers, Lead Glasses & Apron, Portable Dental ... Home , Dental Equipment Supplies Dental Equipment Supplies Categories. Amalgam Carriers. *Amalgam Carriers (9) ... Articles on Dental Equipment Supplies. *Dental Exam Lights are More Than Just Lamps! ...
Veneerable Solder ✐ Corrosion Resistant, Optimum Flowability & Brazing Results ✐ for Non-Precious Alloys Based on Cobalt-Chrome ... Biocompatible, Corrosion-Resistant & Veneerable Special Solder for Homogeneous Soldering Results. For Soldering Dental Crowns, ... EASY NEM Lot - Dental Solder for Crowns, Bridges and Partial Dentures. ... Suitable for Precious Base Metal Casting Alloys based on Cobalt-Chrome (CoCr) in Dental Technology. ...
Contact: [email protected] Phones: 216-591-0001. 250 Pheasant Run Drive,. Chagrin Falls, OH 44022 ... Dental Repairs. - Plumbing. - Tool and Die Shops. - Electronic Repairs. - Automotive and Truck Repairs ...
Dental model base ... Dental model base USD429815S (en) 2000-08-22. Dental model base ... Controller for soldering iron Cited By (5). * Cited by examiner, † Cited by third party. Publication number. Priority date. ... Soldering and desoldering tool controller Download PDF Info. Publication number. USD424077S. USD424077S US29100987 US10098799F ... soldering. Prior art date. 1999-02-22. Legal status (The legal status is an assumption and is not a legal conclusion. Google ...
Ceramic Soldering Plate , Variable Temperature Soldering Station , SolderPro 70 Kit Radical RC Electronics for all hobby needs. ... Dental Wax Corrections. Thawing Frozen Locks. ...and more!. The SOLDERPRO 70K is a 4-in-1 kit containing the following items: ... Silver Bearing Solder-It. Aluminum Solder-It. Copper Bearing Solder-It. Pot Metal Solder-It. It also contains a Professional ... Solder-It Pastes produce solder joints that are 5 to 10 times stronger than conventional solder. That is 5,000 to 28,000 psi ...
2 sets Dental Magnetic Buckle Precision Attachments 1 Cap & 1 Pin Precision Attachments Dental Clinics Labs US $21.84 / lot 2 ... 10pcs SMA Female Bulkhead Precision Connector Solder Attachment Stub Terminal US $7.60 / lot 10 pieces / lot ... 1set Dental Magnetic Armature Buckle Precision Attachments For Dental Clinics And Labs US $9.09 / Set Free Shipping Order (1) ... Precision attachment accessoires ball cap Dental lab denture laboratory material US $6.13 / piece Shipping:. US $7.40 / lot via ...
... and the mode of failure at the soldered and non-soldered areas of cubic ... ... the effect of soldering on porcelain to metal bond strength has not been adequately studied. This study was designed to assess ... Soldering has several applications in prosthodontic treatments; however, ...
It is used in many alloys, including brass, bronze, nickel, and soft solder. It is corrosive-resistant and used in galvanizing ... dental cement; petroleum refining; and embalming and taxidermy products ... Other zinc compounds include zinc chloride, used as a wood preservative, in soldering fluxes, as a mordant in dyeing textiles, ... Other compounds use zinc in cathode-ray tubes, soldering flux, and wood preservatives. ...
... soldering preparations chemicals substances preserving foodstuffs tanning materials adhesives industrysurgical medical dental ... Surgical, medical, dental and veterinary apparatus and instruments, artificial limbs, eyes and teeth; orthopedic articles; ... dental and veterinary apparatus and instruments, artificial limbs, eyes and teeth; orthopedic articles; suture materials.Paper ... tempering and soldering preparations; chemicals substances for preserving foodstuffs; tanning materials; adhesives for industry ...
Soldering method and solder joints formed therein. December, 2005. Chen et al. ... an orthopedic or dental anchor, an orthopedic or dental implant, a dental prosthesis, and an endodontic post. 17. A medical or ... orthopedic/dental anchors, orthopedic/dental implants, dental prostheses, and endodontic posts. The structure may comprise an ... Despite continuous efforts to improve the strength of dental ceramics, all-ceramic dental crowns continue to fail at a rate of ...
Preparation for soldering. *The high quality standard fulfils all demands of a modern sandblasting material ... 125 Micron Pink Cobra Aluminum Oxide 5 kg Bottle - Renfert Dental Corp. ...
Double Bend Dental Tweezer, Titanium Plated. Online Price $14.95. *. Slide Lock Soldering Tweezer, Titanium Plated. Online ...
Most come from manufacturers for the jewelry, dental and watchmaking trades. ... Double Bend Dental Tweezer, Titanium Plated. Online Price $14.95. *. Slide Lock Soldering Tweezer, Titanium Plated. Online ...
dental amalgams, but such compounds have yet to see wide acceptance.*Gallium added in quantities up to 2% in common solders can ...
The electrodes were soldered to a connector. The U-shaped piece and the electrodes were embedded in dental cement and firmly ... except that a stainless steel hook soldered to a fine flexible insulated silver wire was placed in the neck muscles to record ...
... soldering tweezers and waxing instruments with reasonable prices and unmatched quality at Medical Supplies & Equipment. ...
Market research and analysis about Dental Laboratories, including news, information, and reports with HighBeam Business : ... prescriptions and examining dental impressions and models; grinding, polishing, and soldering dental appliances; attempting to ... Complex Dental Object to Complete Reconstruction of the Building for Dental Laboratories Dental Office Dokshitsky Crb At: ... Tenders are invited for Complex dental object to complete reconstruction of the building for dental laboratories dental office ...
Toothpaste and dental rinses; glass etching; infrared light lenses; Teflon; Scotchgard; Gore-tex rainwear; electrical ... Anti-corrosion protective coatings for metals; food cans; solder; window glass; bronze alloy; pewter; electroplating; organ ... Coins and monetary systems; bullion; dental fillings; hand-crafted jewelry, medallions; plating; reflectors in medical lasers; ... X-ray shielding; soundproofing; automotive batteries; gasoline additives; solders; paints; seals, fishing weights, ceramic ...
Tool A is adapted for attachment as an insert 34 into the handle 32 of a conventional ultrasonic dental instrument 30. ... A dental tool device and method is disclosed by which a smooth beveled surface may be formed on a shoulder of a tooth for ... Connection may be had in any suitable manner such as soldering or welding. The tool socket 38 includes an outer metallic sleeve ... Dental tool for preparing a tooth for a dental crown. US6254393 *. 2 Jul 1996. 3 Jul 2001. Kaltenbach & Voigt Gmbh. System for ...
Methods or devices for soldering, casting, moulding or melting {(A61C 13/04, A61C 13/081 take precedence)} ... Dental prostheses devices or artificial dental implant devices per se or their components (e.g. artificial teeth, mounting or ... Dental machines for boring or cutting {; General features of dental machines or apparatus, e.g. hand-piece design} ... Dental dams or holders or clamps. The following illustration shows an example of a dental dam and clamp. ...
CCCC Dental Programs begin partnership with ECU School of Dental Medicine. 08.31.2017 • College & Community • College General ... Mescia donates Weller soldering system to CCCC. 07.29.2014 • College & Community • College General • Curriculum Programs • ... CCCC dental students learn and serve. 08.07.2014 • College & Community • College General • Curriculum Programs • ... CCCC Dental Hygiene instructor trains future teeth cleaners. 03.09.2017 • Admin, Faculty & Staff • College General • Curriculum ...
With no batteries, PCB boards, soldering, or wires, Be. is still a manual toothbrush for all intents and purposes. Two twists ... you get a one years supply of interchangeable and completely recyclable bristle-heads… Thats just dental! I mean mental! ... Designed as a completely analog piece of highly effective dental equipment, the Be. rivals the best electric toothbrushes. Just ... Improve your Dental Health - A deeper clean that changes your tartar fighting game. ...
Jewelry: rings, necklaces, decorations, dental prothesis, melting of stones and sand. + Soldering of electronics on pc-board. ... Brazing (Silver Soldering) of air conditioner capillaries.. + Welding of enameled copper wires used in electric motor and ...
ND YAG CCD Microscope Mini Jewelry Laser Welding Machines for Gold Silver Chain Dental Spot Welder Metal Steel China Soldering ... Ultrasonic Spot Soldering Machine for Welding Elastic Yarns of Mask FOB Price: US $ 650-850 / set. Min. Order: 1 set ... Hot Sale Jewelry Laser Welder Gold Laser Spot Welding Machine Portable 200W 120 J Gold Silver Platinum Repair Laser Soldering ... Portable Jewelry Laser Welder Micro Spot Laser Welding Machine for Dental Gold Silver Jewellery Chain Making Jewelry Repair ...
Dental Amalgam Amalgam dental restorations which are also known as silver fillings are the number one choice for r... ... Solder is an alloy of lead and tin • Dental amalgam = mercury +silver, Tin, Zinc, Copper • Duralumin = aluminium + copper + ... Dental Amalgam Essay. 1376 words - 6 pages Dental Amalgam Amalgam dental restorations which are also known as silver fillings ... The Effects Of Dental Amalgam On The Environment. 1598 words - 6 pages The Effects of Dental Amalgam on the Environment The ...
... serves a similar purpose in soldering operations. Also, an ingredient in dental porcelain that by its lower melting temperature ... flux, soldering,. n a ceramic material such as borax, boric acid, or a combination, in paste, liquid, or granular form; used to ... It is a solvent for metallic oxides and will flow over the parts to be soldered at temperatures well below the fusion ... 2 a substance that maintains the cleanliness of metals to be united and facilitates the easy flow and attachment of solder. ...
Rapid revision tool for the study of dental materials for both-the undergraduate students and the students preparing for... ... Dental Cements 207. 17. Dental Amalgam 248. 18. Direct Filling Gold 272. 19. Dental Casting and Soldering Alloys 280. 20. ... 1. Overview of Dental Materials 1. 2. Structure of Matter and Principles of Adhesion 5. 3. Physical Properties of Dental ... Dental Materials (Dental Devices) - Global Market Analysis and Forecast Model (COVID-19 Market Impact). * Report ...
Could be greatly useful for placing and holding SMD components while soldering. ... If you know someone who need to be scared into proper dental hygiene, you can get gross-out posters of what happens when you ... We recently had occasion to order a lot of toothbrushes, and received a catalog with our shipment from Practicon Dental. There ... You can order business card dental floss packets. Im thinking that "tidy tube winders" would make a great give-away for people ...
  • It is also used to make photographs, in brazing alloys and solders, to disinfect drinking water and water in swimming pools, and as an antibacterial agent. (
  • Silver-copper brazing alloys and solders have many applications. (
  • Dental laboratory technicians working in separate labs may also have contact with patients in preparing and fitting the individual prostheses, but more commonly have no contact with patients. (
  • Dental prostheses devices or artificial dental implant devices per se or their components (e.g. artificial teeth, mounting or attaching means for artificial teeth, devices for supplementing jawbones, crowns) used within the oral cavity. (
  • during the making of dental prostheses (e.g. stands for impression trays). (
  • Peri-Implant Diseases and Biologic Complications at Implant-Supported Fixed Dental Prostheses in Partially Edentulous Patients. (
  • Survival rates and prosthetic complications of implant fixed complete dental prostheses: An up to 5-year retrospective study. (
  • Technical Complications and Prosthesis Survival Rates with Implant-Supported Fixed Complete Dental Prostheses: A Retrospective Study with 1- to 12-Year Follow-Up. (
  • Melt metals or mix plaster, porcelain, or acrylic pastes and pour materials into molds or over frameworks to form dental prostheses or apparatus. (
  • Upon completion, students should be able to construct advanced complete denture prostheses following the dental prescription. (
  • It is a solvent for metallic oxides and will flow over the parts to be soldered at temperatures well below the fusion temperature of solder, but it becomes separated from the solid metal by the molten solder. (
  • Dip workpieces into molten solder or place solder strips between seams and heat seams with irons to bond items together. (
  • Dental amalgam is a mixture of materials containing powdered alloy, metals and mercury. (
  • This solder has a melting point of 300° F. Alloy of tin, lead, and bismuth. (
  • Ceramic materials show excellent esthetic behavior, along with an absence of hypersensitivity, making them a possible alternative implant material in dental surgery. (
  • These tests could demonstrate a mechanically stable implant coating with glass solder matrices. (
  • Reilly, G.C. Porous Titanium for Dental Implant Applications. (
  • For producing a dental prosthesis such as an implant, inlay, bridge or crown, an apparatus, by which a suitable dental prosthesis is formed by preparing three-dimensional measurement data by measuring the shape of a model sampled from a defective part of the teeth or jaw and so forth, and machining a block of a material optimum for a prosthesis based on the measurement data, is proposed. (
  • The method is characterized in that a functional biological coating is implanted on surface of the implant in an electrolytic deposition manner, the implant is a dental implant, a bone implant or a cardiovascular stent, and the functional biological coating is a siRAN coating, a miRNA coating or a DNA coating. (
  • Titanium implants currently widely used in clinical practice, mainly used in dental implants, bone implant materials in the field of cardiovascular stents, with excellent biological activity and irreplaceable. (
  • Implant (dental implant, bone implants, cardiovascular stents, etc.) surface morphology modification proved to be an effective means to improve the biological activity of the implant, wherein the titania nanotube morphologies can promote attachment of osteoblast and functional expression. (
  • The handy cross-locks will lay flat on their backs to hold stuff, like wires, while you solder. (
  • In the 1930s, the invention of the spot welder by Watkin allowed a much greater success rate when soldering fine wires, especially, steel. (
  • Elastics,2 dental floss10 or ligature wires help in securing the retainer in place but cannot 'precisely' position the retainer. (
  • Restorative dentistry, as outlined by Bonnie L. Kendall in Opportunities in Dental Care, traced its beginnings to the Etruscans of central Italy, who made bridges and crowns. (
  • In dentistry, casting is used to create corrective dental pieces such as crowns, bridges, and inlays. (
  • This classification comprises establishments primarily engaged in making dentures, artificial teeth, and orthodontic appliances to order for the dental profession. (
  • Customarily, in creating an actual dental prosthesis, such as full or partial dentures, a bridge, or a crown, laboratories follow instructions provided by the individual dentist and use a wax or plastic impression of the patient's mouth that had been made in the dentist's office. (
  • Construct and repair full or partial dentures or dental appliances. (
  • Upon completion, students should be able to fabricate cast removable partial dentures following the dental prescription. (
  • Your Soldering-Irons---Jigs Source! (
  • Position and align auxiliary parts in jigs and join parts, using solder and blowtorches. (
  • In 1841, he gained notoriety for developing a new process to solder false teeth onto gold plates. (
  • He introduced a new kind of solder that would allow false teeth to be fastened to gold plates. (
  • Which of the following describes false teeth cast or soldered to each other and, at each end, to a crown cemented to abutment teeth? (
  • Hence, the new glass solder matrix coating could improve bone cell growth as a prerequisite for enhanced osseointegration of ceramic implants. (
  • The present study aimed to investigate the cell biological response of human osteoblasts and gingival epithelial cells to ceramic implants coated with two different glass solder matrices. (
  • Dental implants formed from biological material or consisting of oral cavity parts originating either from a donor source or from the patient that are intended to be introduced, or reintroduced, into the patient's oral cavity to correct a dental or oral hygiene problem (e.g. modified natural teeth or jawbone material from a donor). (
  • Comprehensive and cutting-edge content describes the latest materials commonly used in dental practice, including those in esthetics, ceramics, dental implants, and impressions. (
  • A logical and consistent format sets up a solid foundation before progressing into discussions of specific materials, moving from the more common and simple applications such as composites to more specialized areas such as polymers and dental implants. (
  • In the manufacture of implants, for example for dental applications, more and more producers have started using the high-performance plastic PEEK (polyetheretherketone). (
  • A solid denture cleaning composition that when dissolved into water produces an acidic solution for the dissolution and subsequent removal of dental deposits such as tartar and calculus present on contaminated dental prosthesis. (
  • size 1-7, standard, full denture, partial TIGER have been professionally manufacturing and producing all sorts of Dental Instruments. (
  • in·vest·ment/ ( -vest´mint ) material in which a denture, tooth, crown, or model for a dental restoration is enclosed for curing, soldering, or casting, or the process of such enclosure. (
  • Used principally in dentistry as an inclusion in ceramic materials and in soldering and casting metals. (
  • Assured Dental Lab is now offering Ivoclar Vivadent's IPS e.max system, which allows the dentist to select the most suitable all-ceramic. (
  • SPECIFICATIONS: Length: Cap 220 mm (8.7 in) Length: Soldering Tip 190 mm (7.5 in) Length: Blow Torch 172 mm (6.8 in) Weight (when gas-filled) 76 g Approximate temperature soldering tip 210~450°C (410~850°F) Torch 1300°C (2500°F) Gas container capacity 20 mL Operating capacity (one gas filling) 120 min. (
  • The Stahl Tools SSVT variable temperature soldering station was designed to exceed the expectations of veteran technicians -- at a price that's appealing to the electronics hobbyist. (
  • 5-year warranty on base unit and one year warranty on iron handle, USA and Canada only INCLUDES: Soldering iron with stand, sponge, temperature control unit, chisel point tip, pencil tip, instruction manual and decals. (
  • 4. An ingredient in dental porcelain that by its lower melting temperature helps to bond the silica particles. (
  • The invention relates to a method of operating a furnace, in particular for the dental field, in which the temperature is measured and, based on the measured temperature, a temperature control is realized. (
  • When using dental kilns it depends on closely as possible the temperature and also the so-called temperature profile, so the course of the temperature over time, because the quality of the dental restoration parts produced, including both cast, so metallic dental restoration parts and sintered parts can depends heavily on it. (
  • 4 & 5 - cast made of a material which will tolerate the temperature used in casting and soldering. (
  • 2 a substance that maintains the cleanliness of metals to be united and facilitates the easy flow and attachment of solder. (
  • A dental root canal filling consists of a mixture of two different powdered metals such as silver and gold, mixed with an electrolytic liquid, such as the orthophosphoric acid used as a binder for the dental cement which is used to hold the filling in place. (
  • ALSO: Insets for the treatment of dental root-canals to reduce inflammation consist of a pin or wire composed of two different metals, such as silver and gold, soldered end to end with gold solder, or of a wire of one metal embedded in a powder of a different metal, or of a mixture of two different metal powders. (
  • Many metals, minerals, and other nasty things found their way into the bread of ancient Egypt, causing tooth decay and a plethora of dental problems. (
  • 3. The apparatus of claim 1 wherein said dental tool terminates in a smooth surface on a side facing said gum when in operation. (
  • 4. The apparatus of claim 1 wherein said dental tool terminates in a smooth surface on a side facing said gum and on a side which carries said abrasive. (
  • Specially adapted components of apparatus having structural features limiting them to use with at least one of the dental apparatus types specified above (e.g. dust collectors, illumination devices). (
  • For example, an example of such an apparatus is Dental Measuring and Machining Apparatus "CADIM" (registered trademark) (made by Advance Corporation). (
  • The present invention relates generally to dental handpieces and more specifically to anti-microbial apparatus and methods for treating dental handpieces. (
  • A dental measuring and machining system includes a measuring and machining unit for preparing measurement data by measuring a prosthesis model based on a predetermined algorithm and for producing a prosthesis by machining a prosthesis block based on the above measurement data, and an operating unit for. (
  • A user is able to produce a dental prosthesis by operating the measuring and machining unit under the control of a computer. (
  • 6 & 7 - are the replica of the prepared tooth surfaces, residual ridges used to fabricate a dental prosthesis or restoration. (
  • The advanced Iroda butane torch and soldering iron, with its ease of use and extensive functionality has redefined the limits of a compact powerful soldering tool. (
  • Discover our wide range of tabletop autoclaves, compact washer disinfectors, ultrasonic cleaners, water distillers, and sealing machines for dental clinics. (
  • Melt and apply solder along adjoining edges of workpieces to solder joints, using soldering irons, gas torches, or electric-ultrasonic equipment. (
  • Shape and solder wire and metal frames or bands for dental products, using soldering irons and hand tools. (
  • Make repairs, such as enlarging or reducing ring sizes, soldering pieces of jewelry together, and replacing broken clasps and mountings. (
  • Amalgam dental restorations which are also known as silver fillings are the number one choice for restoring teeth. (
  • We process a wide range of input materials, from gold and silver scrap to dental fillings. (
  • Silver is used in jewelry, silverware, electronic equipment, dental fillings, and in lozonges and chewing gums that help people stop smoking. (
  • VITA 3D Master 26 Color Dental Porcelain Material 5M3 Dental Opaque 5M3 paste opaque is our new porcelain material products in NOCERA porcelain system. (
  • used to keep metallic parts clean while they are being heated during a soldering procedure. (
  • Although a dislocated mandible is occasionally caused by trauma, the initiating episode is typically a wide opening followed by biting pressure (eg, biting into a large sandwich with hard bread), a wide yawn, or a dental procedure. (
  • Annalan Laboratory in New Jersey is a custom dental lab with one specialty: occlusal splints (also called night guards). (
  • He worked as a general dental with special interest was orthodontics. (
  • Root Canal Therapy), Dental Surgery and Orthodontics. (
  • Orthodontic Braces (Dental braces or simply braces) commonly employed to straighten crooked or misaligned teeth come under a branch of dentistry known as Orthodontics . (
  • At the end of the decade, the industry benefited from advances in technology and dental techniques, such as digital imaging, but also felt the effects of the economic recession, which had consumers delaying dental care, especially elective, cosmetic dentistry. (
  • The Indian Dental Academy is the Leader in continuing dental education , training dentists in all aspects of dentistry and offering a wide range of dental certified courses in different formats. (
  • Expert authors are well recognized in the fields of dental materials, oral biomaterials, and restorative dentistry. (
  • Since the beginning of their dental practice, Doctors Ocariza have shown even their colleagues their passion for Dentistry particularly Endodontics (treatment e.g. (
  • by Thomas M. Schulein, DDS, MS - Numerous events have transformed the practice of operative dentistry into one that is more efficient and more comfortable for the patient as well as for the operating team, and, often, one that is more productive for the dental office than it was previously. (
  • There are many medical materials made with Titanium including, surgical titanium instruments, orthopedic titanium rods, pins and plates, medical and dental titanium. (
  • Dental laboratories typically purchase their materials from companies that manufacture products specifically for the health care industry (see SIC 3843, Dental Equipment Manufacturers ). (
  • Melt and apply solder to fill holes, indentations, or seams of fabricated metal products, using soldering equipment. (
  • Read prescriptions or specifications and examine models or impressions to determine the design of dental products to be constructed. (
  • Exacta Dental Products, Inc. (
  • All Verified popular dental gifts suppliers & popular dental gifts manufacturers have passed our Business License Check, they can provide quality popular dental gifts products. (
  • We doesn't provide dental filling material products or service, please contact them directly and verify their companies info carefully. (
  • Dental Model Former Base /Silicon Base Former / Dental Lab Material About us We are a dental lab supplying company which specialized in the manufacturing and marketing of dental lab using products series. (
  • We also provide semi-finished wares and alloys for industrial soldering products and manufacture globally tradable bars of gold, silver, etc. (
  • As per American Dental Association specification No.25 gypsum products are classified as follows: 1. (
  • Titanium and titanium alloys are widely used materials in dental and orthopedic replacement surgery. (
  • In addition, the Food and Drug Administration must approve all materials used in the manufacture of dental devices and regulates minimum quality assurance processes and practices. (
  • Compared to other dental materials, it is the "most studied and tested. (
  • Trusted for nearly 40 years, Powers and Wataha's text walks readers through the nature, categories, and uses of clinical and laboratory dental materials in use today. (
  • If you're looking to effectively stay on top of the rapidly developing field of dental materials, look no further than this proven text. (
  • The second edition of Basics of Dental Technology: A Step By Step Approach is a complete reference for the current techniques and materials used in dental technology. (
  • There is no conclusive answer except that the market of dental filling materials offers a vast variety of much more credible and unequivocally better substances in a sense of outmatching biocompatibility like high content gold alloys, ceramics and certain plastic respectively cement materials, regarding the aspect of temporarily or definite solutions. (
  • Plating finishes including selective gold, palladium and gold tin allow the use of various soldering materials and assembly techniques: gold wire bonding, brazing and epoxy die attach. (
  • Dental root caries has received a great deal of attention in the past few decades. (
  • Comes with soldering tip and protective cap. (
  • Jewelers would often use protective asbestos plates during soldering, which they would cut out with their hands. (
  • Those establishments primarily engaged in manufacturing artificial teeth, except to order, are classified in SIC 3843: Dental Equipment and Supplies , and those providing dental X-ray laboratory services are classified in SIC 8071: Medical Laboratories . (
  • Designed as a completely analog piece of highly effective dental equipment, the Be. (
  • 1499 words - 6 pages The objective of this manual is to educate the dental office staff on the basics of radiography, radiation equipment, "ALARA," infection control, film and film processing. (
  • Basics of Dental Technology explains key competencies, concepts, terms, instruments and equipment, from impression handling and model production to tray construction, articulators and facebows. (
  • Operate brazing and soldering equipment. (
  • With a more competitive practice and edgier equipment, Doctors Ocariza stood by their oath of Dental ethics. (
  • Biocompatible, Corrosion-Resistant & Veneerable Special Solder for Homogeneous Soldering Results. (
  • A dental tool device and method is disclosed by which a smooth beveled surface may be formed on a shoulder of a tooth for receiving a crown fitting so that the joint therebetween is concealed as lying substantially below the gum-line and a solid seal is formed between the tooth and crown. (
  • 11. The device of claim 9 wherein said dental tool terminates in a smooth surface on a side facing said gum when in use. (
  • Smooth soldered areas with alternate strokes of paddles and torches, leaving soldered sections slightly higher than surrounding areas for later filing. (
  • Subclass A61K covers preparations that are used for medical, dental, or cosmetic purposes in the oral cavity. (
  • For jewelers, asbestos exposure may have also occurred as a result of soldering in their jewelry-making. (
  • In some cases, dental laboratory technicians work directly for dentists in the dental office itself to facilitate such procedures. (
  • To receive certification, a laboratory is required to employ certified dental technicians in supervisory positions, document facility compliance with accepted health and safety standards, and maintain high levels of training and practice in infection control. (
  • Attuned to the latest developments and filled with tips and advice, this guide provides essential information for trainee dental technicians and students learning about dental technology. (
  • Train or supervise other dental technicians or dental laboratory bench workers. (
  • Learn more on the Dental Laboratory Technicians occupation report. (
  • Topics include dental laboratory history, dentist-laboratory relationships, certification preparation, and legal and ethical requirements of dental laboratories and technicians. (
  • In a preliminary study, the surface modification of ceramics with glass solder matrices was investigated with respect to the mechanical properties surface roughness and adhesive strength [ 22 ]. (
  • Furthermore, surface roughness, adhesive strength, and bending strength of the different glass solder matrices should be evaluated. (
  • Low heat conductivity of professional surface means more soldering/brazing heat goes into the component and not into your work surface. (
  • 38 . The method of claim 31 , wherein applying the coating includes applying the coating directly on the metallic mesh material along an inner surface of the dental appliance, the coating configured to contact a surface of one or more teeth of the patient. (
  • 3. The dental measuring and machining system according to claim 1 , wherein said surface shape acquisition means is operable from the outside of said system. (
  • There were approximately 12,100 dental laboratories providing almost $3.1 billion worth of services at the end of the first decade of the 2000s. (
  • About half of all individual dental laboratories are owned by corporate bodies, while the balance are owned and operated through sole proprietorship and partnerships. (
  • Most of the country's dental laboratories are located in large metropolitan areas, typically within approximately 50 miles of the dental offices it serves. (
  • Therefore, dental laboratories tend to be spread throughout the United States based on geography and population. (
  • Only a few states regulate dental laboratories, and although the federal Occupational Safety and Health Administration (OSHA) does not apply specific guidelines to dental laboratories, it does require labs to follow established standards for proper infection control procedures regarding blood borne pathogens. (
  • The industry also has in place voluntary standards of compliance for the step-by-step manufacturing of specific devices as set out by the National Association of Dental Laboratories. (
  • Qualifying dental laboratories are eligible to apply for certification from the National Board for Certification of Dental Laboratories (CDL), founded by the National Association of Dental Laboratories, which has established specific standards for "personnel skills, laboratory facilities, and infection control in dental laboratories. (
  • Drake Dental Laboratories, Inc. (
  • He conducted a dental practice in Boston without credentials. (
  • Doctors Ocariza's dental practice started about a decade ago in a modest clinic in L. Bernardino Street, Gen. T. De Leon within residential zone. (
  • Specimens of tetragonal zirconia polycrystal (TZP) and aluminum toughened zirconia (ATZ) were modified with glass solder matrices in two configurations which mainly consisted of SiO 2 , Al 2 O 3 , K 2 O, and Na 2 O. The influence on human osteoblastic and epithelial cell viability was examined by means of a WST-1 assay as well as live/dead staining. (
  • 1911 - Greenfield - iridoplatinum basket soldered with 24 carat gold. (
  • Although some of the initial attempts to utilize indium were decidedly low-tech (plating of silverware and use in gold dental alloys), the first real breakthrough came when Mr. Dyer developed the process to indium-plate aircraft engine bearings to make them last longer. (
  • These items ranged from honey to herbs and plants to possibly even gold, though it is uncertain if dental procedures using gold as a filling material took place postmortem. (
  • Could be greatly useful for placing and holding SMD components while soldering. (
  • Most come from manufacturers for the jewelry, dental and watchmaking trades. (
  • This is great solder for your jewelry projects. (
  • Carrying out activities such as jewelry-making, soldering, and photography. (
  • Humans are exposed to silver by breathing low levels in the air, swallowing it in food or drinking water, using anti-smoking lozenges or gums that contain silver, or working with silver while making jewelry, soldering, or working on photography. (
  • I even have some dental and orthopedic surgery tools so if you need a tooth pulled or a bone set, I'm your guy. (
  • These businesses produced custom-made prosthetic appliances for the dental profession. (
  • Mercury is used to make dental amalgam because when it is mixed with amalgam powder, the compound it creates is soft enough to press on the tooth. (
  • [1] At this time, most dental work consisted of shoving things into the decayed, chipped, or broken tooth, gum area, or abscess in hopes of easing the pain. (
  • Prick tiny bits of gunk from nasty places with these U.S. made hardened stainless steel dental tools. (
  • William found work as a clerk, printer, and salesman in Boston before entering Baltimore College of Dental Surgery in 1840. (
  • In 1840, Morton entered the Baltimore College of Dental Surgery, the first of its kind in the world. (
  • The question many have is "what is dental amalgam? (
  • Some other uses of silver metal include its applications as electrodes, catalysts, mirrors, and dental amalgam. (
  • Tool A is adapted for attachment as an insert 34 into the handle 32 of a conventional ultrasonic dental instrument 30. (
  • 600ml Dental Ultrasonic Cleaner , Ultrasonic Cleaning Machine For Jewellery Product description: 1. (
  • Suitable for Precious Base Metal Casting Alloys based on Cobalt-Chrome (CoCr) in Dental Technology. (
  • Solder parts together or fill holes and cracks with metal solder, using gas torches. (
  • n the material used to enclose or surround a pattern of a dental restoration for casting or molding or to maintain the relations of metal parts during soldering. (
  • The present invention relates to a dental measuring and machining system. (
  • If you know someone who need to be scared into proper dental hygiene, you can get gross-out posters of what happens when you don't take care of your teeth. (
  • Embodiments are provided for utilizing metallic portions in dental positioning appliances. (
  • One embodiment includes a removable dental positioning appliance having a shell having one or more cavities shaped to receive and reposition one or more teeth from a first orientation to a successive orientation and where at least a portion of the shell is formed from a metallic mesh material. (
  • shaping the metallic material via interaction with each of the dies to form a dental positioning appliance. (
  • 32 . The method of claim 31 , including forming a first portion of the appliance using a non-metallic, wherein the metallic mesh material forms a second portion of the removable dental positioning appliance. (
  • Shown here is an original bottle of indium solder preforms with a hand written label. (
  • One embodiment includes a removable dental positioning appliance having a shell having one or more cavities shaped to receive and reposition one or more teeth from a first orientation to a successive orientation. (
  • Low levels of fluorides can help prevent dental cavities. (
  • Dental Electrolysis -- fill cavities, treat gingivitis &c. (
  • The information provided will help reduce the patients and staffs exposure to radiation in a dental office setting. (