Abstract
Objectives
To evaluate the effect of a tin-containing fluoride (Sn/F) mouth rinse on microtensile bond strength (μTBS) between resin composite and erosively demineralised dentin.
Materials and methods
Dentin of 120 human molars was erosively demineralised using a 10-day cyclic de- and remineralisation model. For 40 molars, the model comprised erosive demineralisation only; for another 40, the model included treatment with a NaF solution; and for yet another 40, the model included treatment with a Sn/F mouth rinse. In half of these molars (n = 20), the demineralised organic matrix was continuously removed by collagenase. Silicon carbide paper-ground, non-erosively demineralised molars served as control (n = 20). Subsequently, μTBS of Clearfil SE/Filtek Z250 to the dentin was measured, and failure mode was determined. Additionally, surfaces were evaluated using SEM and EDX.
Results
Compared to the non-erosively demineralised control, erosive demineralisation resulted in significantly lower μTBS regardless of the removal of demineralised organic matrix. Treatment with NaF increased μTBS, but the level of μTBS obtained by the non-erosively demineralised control was only reached when the demineralised organic matrix had been removed. The Sn/F mouth rinse together with removal of demineralised organic matrix led to significantly higher µTBS than did the non-erosively demineralised control. The Sn/F mouth rinse yielded higher μTBS than did the NaF solution.
Conclusions
Treatment of erosively demineralised dentin with a NaF solution or a Sn/F mouth rinse increased the bond strength of resin composite.
Clinical relevance
Bond strength of resin composite to eroded dentin was not negatively influenced by treatment with a tin-containing fluoride mouth rinse.
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Acknowledgements
The authors would like to thank 3 M ESPE, Germany and Kuraray Europe, Germany for providing the materials needed. Furthermore, we thank S. Hayoz and Prof. Dr. J. Hüsler, Institute of Mathematical Statistics and Actuarial Science, University of Bern, for statistical analyses.
Conflicts of interest
The authors declare no conflicts of interest, real or perceived, financial or non-financial.
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Flury, S., Koch, T., Peutzfeldt, A. et al. The effect of a tin-containing fluoride mouth rinse on the bond between resin composite and erosively demineralised dentin. Clin Oral Invest 17, 217–225 (2013). https://doi.org/10.1007/s00784-012-0697-1
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DOI: https://doi.org/10.1007/s00784-012-0697-1