Abstract
We have investigated the thermal and structural properties of different commercial dental resins: Filtek TM Z-350, Grandio, Tetric Ceram, and TPH Spectrum. The purpose of the present study was to evaluate quanti- tatively the photo-polymerization behavior and the effect of filler contents on the kinetic cures of the dental resins by using Differential Scanning Calorimetry (DSC) and Fourier Transform Infrared Spectroscopy (FT-IR) techniques. We have successfully obtained the low and high glass transi- tion Tg values of the dental composite resins from DSC curves. It was also observed a good agreement between the both Tg values, activation energies from thermal degrada- tion, and the degree of conversion obtained for all samples. The results have shown that Tetric Ceram dental resin presented the higher Tg values, activation energy of 215 ± 6 KJ mol -1 , and the higher degree of conversion (63%) when compared to the other resins studied herein.
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