Cavity design for Class IV composite resin restorations--a systematic approach.

A definitive cavity design, without pins, that enhances retention and resistance form for simple and complex Class IV composite restorations is proposed. An extracted tooth model and diagrams illustrate the incisal step 4 5 O bevel design for simple cavities and the incisal step veneer bevel design for complex cavities. A case report of a complex Class IV composite restoration is presented. (Received for publication May 1985. Accepted June 1987.)