Ceramic restoration | MDS entrance preaparations

The most suitable margin design for all ceramic restoration is:

A. Shoulder
B. Chamfer
C. Shoulder with bevel
D. Depends upon operators choice

      Ans. (A) Shoulder: Finish Lines Indications

     1. Shoulder All ceramics crowns, Porcelain fused to metal crowns, Injectable porcelains.

    2. Shoulder with bevel Proximal boxes of onlays and inlays. Labial finish line of metal ceramics, Occlusal shoulder of onlays.

     3. Chamfer Cast metal restoration, Lingual aspect of metal ceramics   

     4. Knife edge Young patients, MOD onlay, Inaccessible areas, Finish lines in cementum.