口腔疾病防治Issue(3)：166-169,4.DOI:10.12016/j.issn.2096-1456.2016.03.009
两种镍钛锉清除椭圆形弯曲单根管内充填物的效果评价
The effect evaluation of the curved oval root canal filling clearing by two kinds of nickel titanium files
摘要
Abstract
Objective To evaluate the efficacy of the curved oval root canal filling clearing by two kinds of nickel tita-nium instruments. Methods 75 mandibular premolars with curved oval root canal were prepared with Heor642 and filled with warm vertical compaction technique. The teeth were randomly divided into three groups: ProTaper Universal Retreat-ment group ( ProTaper UR) , Mtwo group, and manual Hedström files group. The percentage of residual filling material from both buccolingual and mesial-distal direction were respectively calculated by X-ray photographs, and the operating time was recorded. Results None of the groups completely removed the filling materials. Two groups of nickel titanium rotary instruments resulted in a smaller percentage of residual filling material compared with the manual Hedström files group from both bucco-lingual and mesial-distal direction, while no significant difference was found between the ProTaper Universal group and Mtwo group. Both of the operating time in the two nickel-titanium groups were less than Hedstrom files group , while no difference was found between the two nickel-titanium groups. Conclusion Both ProTaper UR and Mtwo rotary instruments were effective and efficient in removing filling material, but none of the instruments can com-pletely remove filling material in curved oval root canals.关键词
镍钛锉/椭圆形根管/弯曲根管/牙胶/根管再治疗Key words
NiTi file/Oval root canal/Curved root canal/Gutta-percha/Endodontic reteatment分类
医药卫生引用本文复制引用
罗恒,黄志虹,余艳崧,陈绛媛,曾雄群,胡飚..两种镍钛锉清除椭圆形弯曲单根管内充填物的效果评价[J].口腔疾病防治,2016,(3):166-169,4.基金项目
广东省自然科学基金(2015A030313810) （2015A030313810）
