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Kinetic parameters and monomeric conversion of different dental composites using standard and soft-start photoactivation modes

  • Laser Methods in Chemistry, Biology, and Medicine
  • Published:
Laser Physics

Abstract

This paper evaluates the photopolymerization kinetics and degree of conversion of different commercial dental composites when photoactivated by a LED curing unit using two different modes (standard and soft-start mode). The investigation was performed on with RelyX ARC (dual-cured), Filtek Z-350 (Nanocomposite), Filtek Z-250 (Hybrid), and Filtek Z-350flow (Flowable) resin composites. The analysis used was attenuated total reflection with a Fourier transform infrared (ATR-FTIR). The RelyX ARC resin demonstrated the highest degree of conversion with both LED photoactivation modes. For this resin a 28% decrease in maximum rate was observed and the time to reach its highest rate was almost 2.3 times higher than when the soft-start photoactivation light curing was used. Z-350flow resin recorder a higher maximum rate using the soft-start mode rather than the standard mode. In contrast, the Z-250 showed a higher value using the standard mode. Although Z-250 and Z-350 showed a higher total degree of conversion effectiveness using the soft-start mode, RelyX and Z-350flow achieved a higher value using the standard mode.

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Authors and Affiliations

  1. Instituto de Química de São Carlos, Universidade de São Paulo, 13560-970, São Carlos - SP, Brasil

    A. B. Denis, R. B. Viana & A. M. G. Plepis

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  1. A. B. Denis
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  2. R. B. Viana
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  3. A. M. G. Plepis
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Correspondence to A. B. Denis.

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Original Text © Astro, Ltd., 2012.

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Denis, A.B., Viana, R.B. & Plepis, A.M.G. Kinetic parameters and monomeric conversion of different dental composites using standard and soft-start photoactivation modes. Laser Phys. 22, 1099–1104 (2012). https://doi.org/10.1134/S1054660X12060011

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  • DOI: https://doi.org/10.1134/S1054660X12060011

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