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KMID : 0358920080350040692
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Journal of the Korean Academy of Pedodontics
2008 Volume.35 No. 4 p.692 ~ p.699
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EFFECT OF SURFACE TREATMENTS ON THE REPAIR BOND STRENGTH OF COMPOSITES
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Choi Jung-In
Kim Young-Jae
Kim Jung-Wook
Lee Sang-Hoon
Kim Chong-Chul
Hahn Se-Hyun
Jang Ki-Taeg
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Abstract
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The purpose of this study was to evaluate the effect of surface treatment on the shear bond strength between new and old composite resin. The prepared resin specimens were separated 6 groups, and each group then received a different surface treatment. Then the repair material was added. Shear bond strengths for repair were measured after 7 days and the results were analyzed by using one way ANOVA. The results were as follows; 1. Group 3, 4(air abrasion) showed significantly higher shear bond strength than Group 1(phosphoric acid)(p<0.05). Group 5, 6(diamond bur) showed higher bond strength than Group 1(phosphoric acid) but not significantly different( p>0.05). 2. Group 2(self-etching adhesive) showed lower shear bond strength than Group 1(phosphoric acid) but not significantly different(p>0.05). 3. There was no statistically significant difference between Group 3(air abrasion) and Group 4(air abrasion+etching). 4. There was no statistically significant difference between Group 5(diamond bur) and Group 6(diamond bur+etching). In conclusion, the surface treatment with air abrasion resulted in higher repair bond strength than other methods. Repair bond strength was not significantly affected by acid etching.
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KEYWORD
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Composite resin, Repair, Surface treatment, Shear bond strength
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