Best MDS Coaching AIPGDEE preparations B-IDS | Tooth preparation for Laminates

The tooth preparation for Laminates extends to ?
A. Labial to contact
B. Lingual to contact
C. At contact point
D. None

Ans. (A)

Proximal Reduction- Proximal reduction is simply an extension of facial reduction. Using the round-end tapered diamond continue the reduction into the proximal area, being sure to maintain adequate reduction, especially at the line angle. As the diamond is carried into the inter proximal embrasure, it is easy to lift the Instrument slightly toward the incisal, creating a "step" at the gingiva. This "step should be eliminated, since the tooth structure although small, could create an unsightly dark shadow when the veneer is placed.

To correct an uneven finish line, make sure that diamond is parallel with the long axis of the tooth This guarantee that the gingival extension in the inter proximal area is equal to the reduction of the proximal surface at liE incisal. The proximal reduction should extend into the contact area, but it should stop just short of breaking the contact. When multiple adjacent teeth are prepared for veneers, the contacts should be opened to facilitate separation of the dies without damaging the interproximal finish line.