Molar Metal Ceramic Crown Preparation

Tooth preparation for metal ceramic crowns.

Molar metal ceramic crown preparation.

The metal should be 0 3 to 0 5 mm thick if it is a noble metal alloy while a metal coping made of the more rigid base metal alloys can be thinner to 0 2 mm. Complete coverage by metal. To be successful a metal ceramic crown preparation requires considerable tooth reduction wherever the metal substructure is to be veneered with dental porcelain. Only with sufficient thickness can the darker color of the metal substructure be masked and the veneer duplicate the appearance of a natural tooth.

The preparation must be designed to provide the correct support for the porcelain along its entire incisal edge unless an all ceramic crown with a strong core i e. To be successful a metal ceramic crown preparation requires more tooth reduction wherever the metal substructure is to be veneered with dental porcelain. The extent of the veneer can vary. However sometimes the metal underlying the crown s porcelain can show through as a dark line especially.

To be successful a metal ceramic crown preparation requires considerable tooth reduction wherever the metal substructure is to be veneered with dental porcelain. The extent of the veneer can vary. Most widely used. Metal ceramic crown preparation 2.

Porcelain fused to metal pfm crowns are among the most popular and reliable restorations because of its durability and natural esthetics using a cast metal substructure that is veneered with porcelain this material closely mimics the appearance of a natural tooth. Metal ceramic porcelain fused to metal 2 0 mm incisally 0 5 1 0 mm lingual aspect porcelain guidance requires greater clearance 1 5 mm labial shoulder or heavy chamfer 0 5 mm lingual chamfer 1 5 mm circumferentially for 360 degree ceramic margin. Next to all ceramic crowns porcelain fused to metal crowns look most like normal teeth. Full contour crowns metal or zirconia 1 0 mm non functional cusps 1 5 mm.

11 tooth preparation for all ceramic restorations all ceramic inlays onlays veneers and crowns are some of the most esthetically pleasing prosthodontic restorations. Veneer porcelain mimics 3 extention varies natural teethnatural teeth 4.