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KMID : 0358920150420040281
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Journal of the Korean Academy of Pedodontics
2015 Volume.42 No. 4 p.281 ~ p.290
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Evaluation of Shear Bond Strength and Microleakage of Bulk-fill Resin Composites
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이한별:Lee Han-Byeol
서현우:Seo Hyun-Woo/이주현:Lee Ju-Hyun/박호원:Park Ho-Won
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Abstract
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The aim of this study was to evaluate shear bond strength (SBS) of bulk-fill resin composites (RCs) to dentin and their micro-leakage. One high-viscosity bulk-fill RC and 2 low-viscosity bulk-fill RCs were compared with 1 conventional RC. 7thgenerationbondingagentswereused.
In order to evaluate SBS values, 40 permanent molars were selected and divided into 4 groups. The bulk-fill RCs were applied in 4 mm thickness, whereas the conventional RC was applied in 2 mm thickness.
In order to evaluate micro-leakage, class I cavities (5 × 2 × 4 mm) were prepared in 32 permanent molars. The teeth were divided into 4 groups and restored with resin composites in an increment of 4 mm for the bulk-fill RC and in 2 horizontal increments of 2 mm for the conventional RC.
The mean SBS value of conventional RC showed no statistically significant difference when compared with those of low-viscosity bulk-fill RCs. However, the mean SBS value of high-viscosity bulk-fill RC was significantly lower than that of conventional RC (p < 0.05).
There were no statistically significant differences in micro-leakage between the 4 groups.
For SBS and micro-leakage, the use of low-viscosity bulk-fill RCs might help clinicians simplify the procedure.
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KEYWORD
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Bulk-fill resin composites, Shear bond strength, Micro-leakage, 7thgenerationbondingagent
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