华西口腔医学杂志2012，Vol.30Issue(3)：296-298,303,4.DOI:10.3969/j.issn.1000-1182.2012.03.018
微焦点计算机断层扫描术评价根管再治疗中不同器械根管清理效果的研究
Evaluation of the efficiency of different instrumentation for root canal retreatment using Micro-computed tomography
摘要
Abstract
Objective To establish the three-dimensional model of human permanent premolars based on Micro-computed tomography (Micro-CT) data, and evaluate the efficiency quantitatively of two different instrumentations for root canal retreatment. Methods Forty extracted permanent premolars for the reason of orthodontic treatment were collected, prepared by using ProTaper Ni-Ti files and filled by cold gutta pertscha lateral condensation technique. The subjects were scanned by Micro-CT. Forty teeth were randomly divided into two groups and retreated by K-Flexo files and ProTaper Universal retreatment system respectively. Then all subjects were scanned again, and the mean percentage of remaining filling materials and the scores of remaining filling materials presented in upper, middle and apical 1/3 of the canal were calculated. Results Mean percentage of the remaining filling materials by K-Flexo files was lower than that by ProTaper Universal retreatment system (P=0.005). The scores demonstrated that K-Flexo files had greater efficiency than ProTaper Universal retreatment system when retreating the apical 1/3 of canal (P<0.05). Conclusion This study shows that both techniques could not remove filling materials completely.关键词
微焦点计算机断层扫描术/三维重建/根管再治疗Key words
Micro-computed tomography/ three-dimensional reconstruction/ root canal retreatment分类
医药卫生引用本文复制引用
郭婧,尹恺丰,杨海兵,韩萱,王燕..微焦点计算机断层扫描术评价根管再治疗中不同器械根管清理效果的研究[J].华西口腔医学杂志,2012,30(3):296-298,303,4.基金项目
山东大学自主创新基金自然科学专项基金资助项目(交叉学科培育项目)(2011JC019) （交叉学科培育项目）
