Influence of surface conditions of resin composites on polymerization of glaze coating materials

Abstract

The purpose of this study was to evaluate the influence of surface conditions of a resin composite on polymerization of glaze coating materials by nano-indentation measurements. We prepared three surface conditions of a composite; “before light curing”, “immediately after light curing” and “removed the un-polymerized layer after light curing”. For glaze coating materials in this study BisCover (Bisco) and TOP COAT (Kuraray Medical) were used. These glaze coating materials were applied on each composite surface, and light cured under the manufacturers' directions. The nanohardness of the glaze coating materials was measured with a nano-indentation tester. From the results, the nanohardness of TOP COAT on the un-polymerized surface was significantly lower than the other surface conditions, while BisCover showed no significant differences among all surface conditions.
It was considered that the surface conditions of the resin composite influenced the polymerization of TOP COAT coated on it.