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Thermal and structural properties of commercial dental resins light-cured with blue emitting diodes (LEDs)

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Abstract

We have investigated the thermal and structural properties of different commercial dental resins: FiltekTM Z-350, Grandio®, Tetric Ceram®, and TPH Spectrum®. The purpose of the present study was to evaluate quantitatively 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 transition T g values of the dental composite resins from DSC curves. It was also observed a good agreement between the both T g values, activation energies from thermal degradation, and the degree of conversion obtained for all samples. The results have shown that Tetric Ceram® dental resin presented the higher T g 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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Acknowledgements

The authors gratefully acknowledge the financial support of the Brazilian financing agencies FAPESP, CNPq, PRONEX/FINEP, and CAPES.

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Correspondence to S. S. Rojas.

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Rojas, S.S., Frigo, G.J.M., Bernardi, M.I.B. et al. Thermal and structural properties of commercial dental resins light-cured with blue emitting diodes (LEDs). J Therm Anal Calorim 99, 263–268 (2010). https://doi.org/10.1007/s10973-009-0521-6

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  • DOI: https://doi.org/10.1007/s10973-009-0521-6

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