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This Concept Map, created with IHMC CmapTools, has information related to: JD - Metal Coping Design, facial surface recommended size 1.0 to 2.0 mm wide, dictated by the ultimate goal of achieving a uniform thickness of porcelain which is approximately 1.0-1.2 mm, metal because glazed porcelain removes 40 times as much opposing tooth structure, Maxillary Posterior Teeth variants porcelain coverage of mesial marginal ridge up to the middle of triangular ridge, tooth preparation should be compensated for with extra thickness of the coping, Proximal Contacts to have improved cosmetic effects, areas with deficiencies caused by caries, tooth fracture, or previous restoration in the interproximal areas, should be kept at a minimum thickness that is still compatible with good esthetics the extensions beyond 2 mm, Thickness of the metal underlying and adjoining the porcelain is dictated by the ultimate goal of achieving a uniform thickness of porcelain, metal support under marginal ridges, Fabrication involves either refractory die supports the porcelain margin during firing, Features to consider when designing the metal coping for a PFM restoration Design of the Facial Margin, Metal that is contoured, at least 0.3 to 0.5 mm thick for adequate strength and rigidity, edge of metal at the porcelain-metal junction line is beveled or rounded then the porcelain will end in a feathered edge, Features to consider when designing the metal coping for a PFM restoration Support of the porcelain veneer, a base metal alloy with a higher yield strength, not flex during seating or under occlusal forces because flexure places the porcelain in tension, Placement of ???? Occlusal Contacts, unveneered metal surfaces because location and area covered by ceramic can be more precisely controlled