重庆医学Issue(34)：4563-4565,3.DOI:10.3969/j.issn.1671-8348.2014.34.002
新型镍钛机动器械预备椭圆形根管牙本质微裂比较
Comparison of dentinal microcracks of oval shaped canal prepared with different nickel-titanium instruments
摘要
Abstract
Objective To compare the effect of different nickel-titanium rotary files on fracture resistance of teeth by observing status of dentinal microcracks after root canal preparation with.Methods 6 5 mandibular anterior teeth with single oval canal were randomly divided into three experimental groups (n=20)and a control group (n=5),SAF、ProTaper Universal and ProTaper Next system were used to prepare root canal in experimental groups,while the control group were left unprepared.Roots were sectioned from 3,6,9 mm to the apex,its status of dentinal microcracks was evaluated under a stereomicroscope.Results Root fracture inci-dence rate of group ProTaper Universal was significantly higher than that of group SAF and group ProTaper Next (P<0.05). There were no statistically significant differences in incidence rate of dentinal microcracks between group SAF and group ProTaper Next (P>0.05).Conclusion Roots with oval shaped canal prepared with SAF and ProTaper Next produce less dentinal microc-racks,which decrease risk of vertical root fracture.关键词
牙根/牙本质/根管预备/椭圆形根管Key words
vertical root/dentin/root canal preparation/oval shaped canal分类
医药卫生引用本文复制引用
伍婉翠,吴补领,陈广盛..新型镍钛机动器械预备椭圆形根管牙本质微裂比较[J].重庆医学,2014,(34):4563-4565,3.基金项目
国家自然科学基金资助项目（81371137）。 （）
