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Toxicity potentiation by H2O2 with components of dental restorative materials on human oral cells

  • Organ Toxicity and Mechanisms
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Abstract

Toxicity potentiation of two monomers [bisphenol-A-glycidyldimethacrylate (BisGMA) and urethanedimethacrylate (UDMA)] as well as two comonomers [triethyleneglycoldimethacrylate (TEGDMA) and 2-hydroxyethylmethacrylate (HEMA)], each in combination with H2O2, was investigated on the viability on human gingival fibroblasts (HGF) and human pulpal fibroblasts (HPF). The applied concentration of H2O2 was 0.06 or 0.1 mmol/l, respectively, corresponding to the EC0 of H2O2 in HGF or HPF. The cell viability was assessed by the XTT test. From this test the half maximum effect concentrations (EC50) were calculated from fitted sigmoidale curves. EC50 values were (HGF; mmol/l; mean ± s.e.m.; n = 5): HEMA 11.9 ± 0.9, TEGDMA 3.7 ± 0.3, H2O2 0.36 ± 0.04, UDMA 0.27 ± 0.08, and BisGMA 0.11 ± 0.03. No significant (P < 0.05) differences in the EC50 values were observed when HGF was exposed to substances, as compared to HPF. No significant decrease of the EC50 values was found when HGF or HPF, respectively, was exposed to HEMA or BisGMA in addition with H2O2 up to the concentration of 0.1 mmol/l, as compared to those EC50 values of each compound without H2O2 addition. A significant decrease of the TEGDMA EC50 value from 3.7 to 2.1 or 0.4 mmol/l, respectively, was found when cells were exposed to TEGDMA in combination with H2O2 (0.06 or 0.1 mmol/l), as compared to that TEGDMA EC50 value without H2O2 addition. A significant decrease of the UDMA EC50 value from 0.27 to 0.11 or 0.08 mmol/l, respectively, was found when HGF or HPF was exposed to UDMA in combination with H2O2 (0.06 or 0.1 mmol/l), as compared to that UDMA EC50 value without H2O2 addition. The addition of H2O2 (0.06 or 0.1 mmol/l) resulted in a toxicity potentiation of TEGDMA and UDMA, but not of HEMA and BisGMA, on HGF or HPF.

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Acknowledgments

This work has been supported by the Deutsche Forschungsgemeinschaft (DFG), Germany; number RE 633/2-1/4. The authors gratefully acknowledge the excellent technical assistance of Sabine Domes and Stefan Schulz.

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Authors and Affiliations

  1. Walther-Straub-Institute of Pharmacology and Toxicology, Ludwig-Maximilians-University of Munich, Goethestr. 33, 80336, Munich, Germany

    Franz-Xaver Reichl, Mario Seiss & Wolfgang Marquardt

  2. Department of Operative/Restorative Dentistry, Periodontology and Pedodontics, Ludwig-Maximilians-University of Munich, Goethestr. 70, 80336, Munich, Germany

    Franz-Xaver Reichl, Mario Seiss, Wolfgang Marquardt & Reinhard Hickel

  3. Department of Otolaryngology, Head and Neck Surgery, Julius-Maximilians-University of Würzburg, Josef-Schneider-Straße 11, 97080, Würzburg, Germany

    Norbert Kleinsasser

  4. Department of Operative/Restorative Dentistry, Periodontology and Pedodontics, University of Regensburg, Franz-Josef-Strauß-Allee 11, 93042, Regensburg, Germany

    Helmut Schweikl

  5. Bundeswehr Institute of Pharmacology and Toxicology, Neuherbergstr. 11, 80937, Munich, Germany

    Kai Kehe

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  1. Franz-Xaver Reichl
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Correspondence to Franz-Xaver Reichl.

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Reichl, FX., Seiss, M., Marquardt, W. et al. Toxicity potentiation by H2O2 with components of dental restorative materials on human oral cells. Arch Toxicol 82, 21–28 (2008). https://doi.org/10.1007/s00204-007-0226-1

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