Molar Metal Ceramic Crown Preparation

Only with sufficient thickness can the darker color of the metal substructure be masked and the veneer duplicate the appearance of a natural tooth.

Molar metal ceramic crown preparation.

Full contour crowns metal or zirconia 1 0 mm non functional cusps 1 5 mm. Most widely used. The extent of the veneer can vary. Next to all ceramic crowns porcelain fused to metal crowns look most like normal teeth.

11 tooth preparation for all ceramic restorations all ceramic inlays onlays veneers and crowns are some of the most esthetically pleasing prosthodontic restorations. Tooth preparation for metal ceramic crowns. 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 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. 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.

To be successful a metal ceramic crown preparation requires considerable tooth reduction wherever the metal substructure is to be veneered with dental porcelain. Because there is no metal to block light transmission they can resemble natural tooth structure better in terms of color and translucency than can any other restorative option. Complete coverage by metal. The extent of the veneer can vary.

Ensuring the preparation has a 90 cavosurface angle helps to prevent unfavourable distribution of stresses and minimises the risk of the crown fracturing. Only with sufficient thickness can the darker color of the metal substructure be masked and the veneer duplicate the appearance of a natural tooth.