2种镍钛器械对根管充填物清除效率比较  

Evaluation of the efficacy of two kinds of NiTi retreatment instruments for removing filling material during root canal retreatment

作　　者：李金恒[1] 伍甜甜[1] 何宏[1] 韩俊力[1] LI Jin-heng WU Tian-tian HE hong HAN Jun-li(Department of General Dentistry, Shanghai Ninth People＇s Hospital, College of Stomatology, Shanghai Jiao Tong University School of Medicine,Shanghai Key Laboratory of Stomatology. Shanghai 200011, China)

机构地区：[1]上海交通大学医学院附属第九人民医院.口腔医学院口腔综合科上海市口腔医学重点实验室,上海200011

出　　处：《上海口腔医学》2017年第3期268-271,共4页Shanghai Journal of Stomatology

摘　　要：目的 :比较Mtwo R再治疗锉、Reciproc锉与手动器械在根管再治疗过程中对根管内充填物的清除效率。方法 :取45颗离体下前牙,清理根管后,预备至40#。牙胶尖和AH Plus糊剂以冷侧压法充填根管。随机分为3组,分别用手用器械、Mtwo R和Reciproc去除根管内充填材料,收集推出根尖孔的碎屑,称重,记录所用时间。样本沿长轴颊舌向劈开,显微镜下进行观察、评分。采用SPSS13.0软件包对数据进行统计学分析。结果:3种方法碎屑推出量和管壁清洁度无显著差异(P>0.05),Mtwo R组和Reciproc组用时更少(P<0.05)。结论:镍钛器械并不能完全清除根管充填物,但可以提高效率。PURPOSE： To compare the efficacy of Mtwo R and Reciproc with that of hand files in removing filling material during root canal retreatment. METHODS： The root canals of forty-five human extracted mandibular central incisors were cleaned and shaped to a size 40 and filled with gutta-percha and sealer using a lateral compaction technique. The teeth were divided into 3 groups. The filling material was removed with hand files, Mtwo R and Reciproc, respectively. The debris extruded out of the apical foramen was collected and weighted. The working time was recorded. Then the teeth were split longitudinally, observed under microscope, and evaluated. The data were statistically analyzed with SPSS 13.0 software package. RESULTS： There was no significant difference among 3 groups for debris extrusion （P〉 0.05）. Removal of filling material with Mtwo R and Reciproc consumed less time （P〈0.05）. CONCLUTIONS： NiTi retreatment instruments can not remove all filling material during root canal retreatment, but can reduce working time.

关 键 词：Mtwo R Reciproc 镍钛 根管再治疗 

分 类 号：R781.05[医药卫生—口腔医学]