EFFECT OF CAVITY DESIGN ON GAP FORMATION IN CLASS-II COMPOSITE RESIN RESTORATIONS

This study examined the width of the gap at the cervical wall in traditional cavity preparations or adhesive designs that were restored with various composite resins by different procedures. Fifty-four intact human molars were restored with several composite resins and their respective bonding agents. A rectangular cavity was prepared in one proximal surface and a spherical cavity was prepared in the other proximal surface. The composite resin Occlusin with the bonding agent recorded the least gap width compared with similar materials. The spherical cavity restorations recorded less gap width than the rectangular cavity restorations.