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지원사업
학술연구/단체지원/교육 등 연구자 활동을 지속하도록 DBpia가 지원하고 있어요.
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연구자들이 자신의 연구와 전문성을 널리 알리고, 새로운 협력의 기회를 만들 수 있는 네트워킹 공간이에요.
논문 기본 정보
- 자료유형
- 학위논문
- 저자정보
- 지도교수
- 고영무
- 발행연도
- 2016
- 저작권
- 조선대학교 논문은 저작권에 의해 보호받습니다.
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초록· 키워드
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Dentists are commonly faced with the decision of what to do with detached or inaccurately positioned brackets that require re-positioning during treatment. One solution is to reused the brackets without compensate for bond strength. The purpose of this study was to evaluate the effects of the surface treatments of the detached metal bracket on the shear bond strength(SBS) of orthodontic brackets bonded to bovine.
Eighty detached brackets without any damage were selected and twenty new brackets (CTL) were prepared. Twenty used brackets, which had less than 5% residual adhesives in the base, were not treated, but cleaned with ultrasonic cleaner using ethanol (EXP-1). Used brackets were ground with green stone until mesh patterns were exposed (EXP-2), were sandblasted with alumina particles (EX-3), and were sandblasted subsequent to green stone grinding (EXP-4). One hundred bovine teeth were used for bracket bonding test. SBS test and adhesive reminant index (ARI) evaluation were performed, and the data were analyzed using ANOVA test (p = 0.05).
EXP-1 showed the significantly low SBS (8.24 MPa, p<0.05), but higher bond strength than the clinically required bond strength. EXP-2 showed the lowest SBS (6.59 MPa) among experimental groups. EXP-3 showed the highest SBS (11.99 MPa), but no significantly different with CTL (11.50 MPa). Average SBS of EXP-4 was 10.20 MPa, it was not significantly different with CTL or EXP-3.
Eighty detached brackets without any damage were selected and twenty new brackets (CTL) were prepared. Twenty used brackets, which had less than 5% residual adhesives in the base, were not treated, but cleaned with ultrasonic cleaner using ethanol (EXP-1). Used brackets were ground with green stone until mesh patterns were exposed (EXP-2), were sandblasted with alumina particles (EX-3), and were sandblasted subsequent to green stone grinding (EXP-4). One hundred bovine teeth were used for bracket bonding test. SBS test and adhesive reminant index (ARI) evaluation were performed, and the data were analyzed using ANOVA test (p = 0.05).
EXP-1 showed the significantly low SBS (8.24 MPa, p<0.05), but higher bond strength than the clinically required bond strength. EXP-2 showed the lowest SBS (6.59 MPa) among experimental groups. EXP-3 showed the highest SBS (11.99 MPa), but no significantly different with CTL (11.50 MPa). Average SBS of EXP-4 was 10.20 MPa, it was not significantly different with CTL or EXP-3.
목차
I. 서론 1II. 재료 및 방법 41. 탈락된 브라켓의 재생처리 42. 우치 시편 준비 및 브라켓 접착 63. 전단접착강도 (SBS) 측정 74. 접착제 잔류지수 (ARI) 평가 8III. 연구결과 9IV. 총괄 및 고찰 12V. 결론 16참고문헌 17
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