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KMID : 1035320170440020095
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Korean Society for Dental Materials
2017 Volume.44 No. 2 p.95 ~ p.105
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Evaluation of bulk-fill resin composite on the shear bond strength of metal brackets
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Park Mi-Gyoung
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Abstract
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This study evaluated the shear bond strength (SBS) and adhesive remnant index (ARI) of bulk-fill resin composites compared to conventional bonding adhesive. One hundred and eighty human teeth were randomly divided into four different adhesive groups: (1) Filtek Bulk Fill, (2) Tetric-N Ceram Bulk Fill, (3) SonicFill, and (4) Transbond XT. These groups were divided into three subgroups by light-curing units (LCU). Orthodontic metal brackets were bonded to the enamel surface using the four different adhesives, and light curing was performed. After specimens were stored for 24 h in distilled water, SBS was measured. Adhesive remnant index (ARI) scores were determined after the failure of orthodontic brackets. For all LCUs, Transbond XT had a higher SBS than bulk-fill resin composites. For all LCUs, the bulk-fill resin composites showed clinically acceptable SBS values. Analysis of variance revealed significant differences between the bulk-fill resin composite groups, with SonicFill having a significantly higher SBS than the other two bulk-fill resin composites (p < 0.05). However, the LCUs had no significant impact on SBS (p = 0 .0 61). ARI s cores were significantly d ifferent among adhesive groups, but ARI scores were not significantly different among LCUs. The SBS of all bulk-fill resin composites was the higher than the recommended SBS of the adhesives (5.9 - 7.8 MPa). In the Filtek Bulk Fill and Tetric-N Ceram groups that showed the lower SBS values, more adhesive remained on the enamel surface. Bulk-fill resin composites can be used clinically as adhesives for orthodontic bracket bonding.
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KEYWORD
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Bulk-fill resin composite , shear bond strength , adhesive, metal bracket
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