Bond Strength of Methacrylate-Based Composite to Dentin using a Silorane Adhesive
Uniformed Services University Of The Health Sciences Bethesda United States
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Objective The purpose of this study was to compare the shear bond strength of methacrylate-based composite bonded to dentin using a silorane-based adhesive versus other methacrylate-based adhesive bonding agents over time. Methods Eighty human third molars were mounted in PVC pipe, sectioned with a low-speed diamond saw to expose dentin, and surfaces prepared with 600-grit sandpaper. The specimens were randomly divided into four groups of twenty to include a silorane-based adhesive Filtek LS System Adhesive, 3M ESPE or one of three methacrylate-based adhesive bonding agents Clearfil SE Bond, Kuraray Optibond FL, Kerr Adper Scotch bond MultiPurpose, 3M ESPE. Adhesive systems were applied according to manufacturers instructions. Composite Filtek Z250, 3M ESPE was inserted into a mold in 2-mm increments to a height of 4 mm and light cured for 20 seconds per increment. Specimens were stored for 24 hours or 6 months in 37C distilled water, then tested in shear with a universal testing machine Instron. A mean shear bond strength value MPa and standard deviation was determined per group. Data was analyzed with a two-way ANOVA and Tukeys post hoc test 0.05. Results No significant difference was found between groups based on bonding agent p0.166 or storage time p0.219 with no significant interaction p0.238. Conclusions Based on this in vitro study, it appears that the silorane-based adhesive bonding agent provides comparable shear bond strengths to dentin as proven methacrylate-based adhesive systems and may be used to bond methacrylate-based composite to dentin.