A light curing method for improving marginal sealing and cavity wall adaptation of resin composite restorations

Abstract

Objective: The aim of this study was to evaluate whether the method of light curing could influence: (a) marginal sealing and resin composite adaptation to the cavity wall; (b) polymerization contraction rate; and (c) the hardness at the top and bottom surfaces of a body of resin composite. Methods: Standard cylindrical cavities, 1 mm deep and 3 mm in diameter were prepared on flat superficial dentin surfaces in bovine teeth. The teeth were bonded with one of two adhesive systems (Clearfil Photo Bond, and Super-Bond D Liner) and filled with a hybrid resin composite. The resins were cured using three light intensities of 600, 270 and 20 mW/cm2, and various curing times. After thermal cycling,..