DEGREE OF CONVERSION OF NOVEL LOW-SHRINKING COMPOSITES AND METHACRYLATE-BASED RESIN COMPOSITE

Purpose: the purpose of this in-vitro study was to determine the degree of conversion of three different composite materials. material and methods: in this study three composite materials were analyzed; a traditional methacylate-based composite (premise, kerr, orange, ca, usa), a silorane-based composite (filtek silorane, 3m espe, st.paul. mn, usa) and a novel low-shrinking composite (gc kalore, gc europe, leuven, belgium). degree of conversion was measured on the composite with ftir spectroscopy (perkin elmer spectrum one, ma, usa). ftir analyses were performed at the prepolymerization and post-polymerization stages of tested materials. results: the silorane-based novel composite resin filtek silorane (58,60%) showed significantly higher conversion degree when compared to premise (44,65%) and kalore (44,53%). conclusion: the conversion degree of resin composite might depend on monomer structure and siloranbased composite polymerized better than other tested composites.