지원사업
학술연구/단체지원/교육 등 연구자 활동을 지속하도록 DBpia가 지원하고 있어요.
커뮤니티
연구자들이 자신의 연구와 전문성을 널리 알리고, 새로운 협력의 기회를 만들 수 있는 네트워킹 공간이에요.
논문 기본 정보
- 자료유형
- 학술저널
- 저자정보
- 발행연도
- 2007.6
- 수록면
- 362 - 369 (8page)
이용수
초록· 키워드
오류제보하기
The aim of this study was to investigate the effect of the hybrid instrumentation method with ProTaper and ProFile on the change of root canal area and distance from the canal to the root surface after canal shaping.
The mesial canals of twenty extracted mandibular first molars having 10-20°? curvature were scanned using X-ray micro-computed tomography (XMCT)-scanner before root canals were instrumented. They were divided into four groups (n=10 canals per group). In Group 1, root canals were instrumented by the step-back technique with stainless steel K-Flexofile after coronal flaring. The remainders were instrumented by the crown-down technique with, ProTaper system (Group 2), ProFile (Group 3) or ProTaper and ProFile (Group 4). All canals were prepared up to size 25 at the end-point of preparation and scanned again. Pre-and post-operative cross-sectional images of 1, 3, 5, and 7㎜ from the apical foramen were compared. For each level, change of cross-sectional canal area and distance to the nearest external root surface was calculated using Adobe Photoshop 6.0 and image software program.
In the change of cross-sectional area, Group 4 was less than Group 2 at 3 ㎜ and 5 ㎜ level (p＜0.05). In the difference of the distance from the canal to the root surface after canal shaping, Group 4 was least among the other groups at 7 ㎜ level (p＜0.05). According to the results, the methods using ProFile or K file only and the hybrid instrumentation technique using ProTaper and ProFile are more appropriate methods of canal preparation than ProTaper system for narrow or curved canals.
The mesial canals of twenty extracted mandibular first molars having 10-20°? curvature were scanned using X-ray micro-computed tomography (XMCT)-scanner before root canals were instrumented. They were divided into four groups (n=10 canals per group). In Group 1, root canals were instrumented by the step-back technique with stainless steel K-Flexofile after coronal flaring. The remainders were instrumented by the crown-down technique with, ProTaper system (Group 2), ProFile (Group 3) or ProTaper and ProFile (Group 4). All canals were prepared up to size 25 at the end-point of preparation and scanned again. Pre-and post-operative cross-sectional images of 1, 3, 5, and 7㎜ from the apical foramen were compared. For each level, change of cross-sectional canal area and distance to the nearest external root surface was calculated using Adobe Photoshop 6.0 and image software program.
In the change of cross-sectional area, Group 4 was less than Group 2 at 3 ㎜ and 5 ㎜ level (p＜0.05). In the difference of the distance from the canal to the root surface after canal shaping, Group 4 was least among the other groups at 7 ㎜ level (p＜0.05). According to the results, the methods using ProFile or K file only and the hybrid instrumentation technique using ProTaper and ProFile are more appropriate methods of canal preparation than ProTaper system for narrow or curved canals.
목차
ABSTRACT
Ⅰ. 서론
Ⅱ. 연구 재료 및 방법
Ⅲ. 실험결과
Ⅳ. 총괄 및 고찰
결론
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UCI(KEPA) : I410-ECN-0101-2013-515-003381069