| EFFECT OF SURFACE TREATMENTS ON THE REPAIR BOND STRENGTH OF COMPOSITES |
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Jung-In Choi, Young-Jae Kim, Jung-Wook Kim, Sang-Hoon Lee, Chong-Chul Kim, Se-Hyun Hahn, Ki-Taek Jang |
| Department of Pediatric Dentistry, College of Dentistry and Dental Research Institute, Seoul National University |
| 복합레진의 수리 시 표면처리가 결합강도에 미치는 영향 |
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최정인, 김영재, 김정욱, 이상훈, 김종철, 한세현, 장기택 |
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서울대학교 치과대학 소아치과학교실 및 치학연구소 |
Correspondence:
Ki-Taek Jang, Tel: 02-2072-3819, Email: jangkt@snu.ac.kr
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Received: 11 June 2008 • Accepted: 16 October 2008 |
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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. |
| Key Words:
Composite resin, Repair, Surface treatment, Shear bond strength |
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