Enhancing esthetics in porcelain fused to metal through technique modifications. 1985

C H Pameijer, and T Kikutake

Three techniques have been discussed and illustrated, with diagrams and examples of clinical cases, that will aid the practitioner to achieve better esthetics when using porcelain fused to metal restorations. The labial butt joint preparation is particularly suitable for upper anterior teeth when the smile line exposes the gingival margin of the restoration and maximal esthetics are demanded. Clinically, the preparation has to be executed in such a way that technically the ceramist does not have to compromise the restoration. Wrong buccal shoulder preparations and too large a space between porcelain and shoulder are the most frequently observed errors. A porcelain sandwich technique in which a thin incisal porcelain layer is condensed between body and translucent porcelain enhances the translucency of the restoration and improves the natural appearance. This technique is particularly suitable for anterior teeth, yet posterior teeth benefit from this method as well, and particularly upper bicuspids are excellent candidates. The third technique uses a blend gold that is applied to the opaque and covered again with another layer of opaque. This method effectively blocks the graying effect often experienced at the gingival margin caused by the underlying metal. A deep chamfer offers the ideal preparation and accommodates the technical requirements best. In conclusion, it can be stated that dentists and dental technicians have available various techniques that make it easier to meet the theoretical and practical requirements of esthetics in dentistry.

UI MeSH Term Description Entries
D001840 Dental Bonding An adhesion procedure for orthodontic attachments, such as plastic DENTAL CROWNS. This process usually includes the application of an adhesive material (DENTAL CEMENTS) and letting it harden in-place by light or chemical curing. Bonding, Dental,Cure of Orthodontic Adhesives,Curing, Dental Cement,Dental Cement Curing,Orthodontic Adhesives Cure
D003442 Crowns A prosthetic restoration that reproduces the entire surface anatomy of the visible natural crown of a tooth. It may be partial (covering three or more surfaces of a tooth) or complete (covering all surfaces). It is made of gold or other metal, porcelain, or resin. Dental Crowns,Crown, Dental,Crowns, Dental,Dental Crown,Crown
D003722 Dental Alloys A mixture of metallic elements or compounds with other metallic or metalloid elements in varying proportions for use in restorative or prosthetic dentistry. Alloy, Dental,Alloys, Dental,Dental Alloy
D003737 Dental Cavity Preparation An operation in which carious material is removed from teeth and biomechanically correct forms are established in the teeth to receive and retain restorations. A constant requirement is provision for prevention of failure of the restoration through recurrence of decay or inadequate resistance to applied stresses. (Boucher's Clinical Dental Terminology, 4th ed, p239-40) Cavity Preparation, Dental,Cavity Preparations, Dental,Dental Cavity Preparations,Preparation, Dental Cavity,Preparations, Dental Cavity
D003776 Dental Porcelain A type of porcelain used in dental restorations, either jacket crowns or inlays, artificial teeth, or metal-ceramic crowns. It is essentially a mixture of particles of feldspar and quartz, the feldspar melting first and providing a glass matrix for the quartz. Dental porcelain is produced by mixing ceramic powder (a mixture of quartz, kaolin, pigments, opacifiers, a suitable flux, and other substances) with distilled water. (From Jablonski's Dictionary of Dentistry, 1992) Porcelain,Porcelain, Dental,Dental Porcelains,Porcelains,Porcelains, Dental
D003779 Denture Design The plan, delineation, and location of actual structural elements of dentures. The design can relate to retainers, stress-breakers, occlusal rests, flanges, framework, lingual or palatal bars, reciprocal arms, etc. Denture Designs,Design, Denture,Designs, Denture
D004955 Esthetics, Dental Skills, techniques, standards, and principles used to improve the art and symmetry of the teeth and face to improve the appearance as well as the function of the teeth, mouth, and face. (From Boucher's Clinical Dental Terminology, 4th ed, p108) Cosmetic Dentistry,Aesthetics, Dental,Dental Esthetic,Dental Esthetics,Esthetic, Dental,Cosmetic Dentistries,Dentistries, Cosmetic,Dentistry, Cosmetic
D006047 Gold Alloys Alloys that contain a high percentage of gold. They are used in restorative or prosthetic dentistry. Gold Alloy,Alloy, Gold,Alloys, Gold
D006801 Humans Members of the species Homo sapiens. Homo sapiens,Man (Taxonomy),Human,Man, Modern,Modern Man

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