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Thermal analysis of light-curing composites

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Abstract

The aim of this study has been to evaluate light-curing composites polymerization quality (monomer/polymer) with an halogen and diode lamp through the thermal analysis (TG-DTA). Samples have been polymerized at 20, 40 and 50 s through a constant and a soft start polymerization and, subsequently, analyzed by TG-DTA. The TG/DTA analysis shows that different light-curing times affect the degree of conversion of the composite, since by increasing the curing time the quantity of the monomer that has not reacted (residual) decreases. The halogen lamp, compared to the diode lamp, produces a lower mass loss at 20 s, while for 40 and 50 s the results are overlapping. The soft start polymerization (20 s) initially produces a higher mass loss, if compared to the constant intensity, but, by performing a polymerization for at least 40 s, the results can be overlapped.

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Authors and Affiliations

  1. Dental Materials, Department of Oral Dental Diseases, University of Chieti – Italy, Via Vestini 31, 66013, Chieti, Italy

    Maurizio Ferrante, Morena Petrini, Paolo Trentini, Luigi Ciavarelli & Giuseppe Spoto

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  1. Maurizio Ferrante
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  2. Morena Petrini
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  3. Paolo Trentini
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  4. Luigi Ciavarelli
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  5. Giuseppe Spoto
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Correspondence to Maurizio Ferrante.

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Ferrante, M., Petrini, M., Trentini, P. et al. Thermal analysis of light-curing composites. J Therm Anal Calorim 102, 107–111 (2010). https://doi.org/10.1007/s10973-010-0767-z

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  • DOI: https://doi.org/10.1007/s10973-010-0767-z

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