Abstract
Introduction: The aim of this study was to investigate the effect of irradiation duration and distance of light tip to prepared samples in two different light curing unites on the degree of conversion of resin composite. Materials and Methods: Conventional halogen and blue Light emitting diode (LED) units were used for polymerization of an Opalis resin composite. The conversion measurements were carried out at 0 and 8 mm distance from the directly irradiated surface in manufactured recommended curing time as well as in doubled curing time. The curing efficiency was observed with FTIR (Fourier transform infrared spectroscopy). Data was analyzed using ANOVA and Tukey post
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