Use of polypropylene copings to simplify the waxing procedure for mesio-occlusodistal and partial veneer crowns. 1990

M H Dumais

Although polypropylene copings have been used for porcelain-fused-to-metal patterns and recently for pin-retained castings, their use for partial veneer crowns has not been reported. This paper describes the use of copings for mesio-occlusodistal onlays, three-quarter crowns, and seven-eighths crowns. Some of the problems encountered in the fabrication of such restorations can be eliminated. Pattern fractures are almost nonexistent during the waxing stage. Groove or box adaptation to the preparation is easily maintained, and the internal aspects of the crowns are cleaner and smoother.

UI MeSH Term Description Entries
D007284 Inlays Restorations of metal, porcelain, or plastic made to fit a cavity preparation, then cemented into the tooth. Onlays are restorations which fit into cavity preparations and overlay the occlusal surface of a tooth or teeth. Onlays are retained by frictional or mechanical factors. Dental Inlays,Dental Onlays,Onlays,Dental Inlay,Dental Onlay,Inlay, Dental,Inlays, Dental,Onlay, Dental,Onlays, Dental,Inlay,Onlay
D011126 Polypropylenes Propylene or propene polymers. Thermoplastics that can be extruded into fibers, films or solid forms. They are used as a copolymer in plastics, especially polyethylene. The fibers are used for fabrics, filters and surgical sutures. Propene Polymers,Propylene Polymers,Hostalen,Marlex,Marlex Polypropylene,Polypro,Polypropylene,Prolene,Polymers, Propene,Polymers, Propylene,Polypropylene, Marlex
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
D003735 Dental Casting Technique The process of producing a form or impression made of metal or plaster using a mold. Casting Technic, Dental,Casting Technics, Dental,Casting Technique, Dental,Casting Techniques, Dental,Dental Casting Technic,Dental Casting Technics,Dental Casting Techniques,Technic, Dental Casting,Technics, Dental Casting,Technique, Dental Casting,Techniques, Dental Casting
D006801 Humans Members of the species Homo sapiens. Homo sapiens,Man (Taxonomy),Human,Man, Modern,Modern Man

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