Polymerization efficiency of bulk-fill dental resin composites with different curing modes

摘要

The aim of this study was to investigate the effect of four different curing modes on the polymerization efficiency of eight bulk-fill composites. Five specimens for each material were prepared for Vickers hardness measurements. The measurements were performed at 0 and 2 or 4 mm from the top of the surface of the specimens 24 h after photopolymerization. Statistical analysis was performed with one-way analysis of variance and Tukey post hoc tests at a level of significance of a=0.05 where a is the the level of significance. The light-curing mode affected the microhardness in all depths, but this influence was material-dependent (p(mat)<0.001), where p(mat) is the probability to be affected by the material. The Vickers hardness numbers of the tested composites at 0 mm ranged from 9.32 +/- 0.87 to 72.58 +/- 6.52 and those of the tested composites at 4 mm ranged from 5.48 +/- 0.32 to 54.34 +/- 2.27. The clinician has to be aware of the technical characteristics of the materials and light-curing units (LCUs) to use the most appropriate combination of LCU, composite material, and application technique. (c) 2016 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2016, 133, 43392.