安徽医科大学学报2017，Vol.52Issue(6)：930-933,4.DOI:10.19405/j.cnki.issn1000-1492.2017.06.034
镍钛根管锉的横截面与根管壁微裂纹产生的相关性分析的体外研究
Correlation analysis of Ni-Ti root canal file cross section between the generation of micro cracks on root tube wall: an in vitro study
摘要
Abstract
To compare the incidences of root cracks after root canal preparation with the MTwo,the TF Ni-Ti,the S3 Ni-Ti and ProTaper Next Ni-Ti machine files.One hundred simple root with straight root canal premolars were selected and randomly divided into five groups (n=20).One group was left unprepared and served as a negative control;all experiment groups prepared root canal up to number 25,taper 0.06.All of the roots were sectioned perpendicular to the long axis at 3,6,and 9 mm from the apex,and the sections were then observed under a Stereo-microscope.The absence of cracks was recorded.The results showed no cracks were observed in the negative control group.The incidence rate of the MTwo,TF Ni-Ti,S3 and ProTaper Next Ni-Ti machine files group micro cracks on root tube wall respectively is 30%,20%,10%,5%,there were no significant differences among the three former group,there were significant differences between the MTwo and ProTaper Next group.The results showed that: The ProTaperNext Ni-Ti machine system is not more likely to lead to micro cracks on root tube wall than the MTwo,TF,S3 Ni-Ti machine files;the number and position of cross section of Ni-Ti root canal preparation instrument has correlation with the occurrence of micro cracks on root tube wall.关键词
牙本质缺陷/微裂纹/镍钛根管预备器械/根管预备/牙根纵裂Key words
dentin defect/the micro cracks/Ni-Ti root canal preparation-instrument/root canal preparation/vertical root fracture分类
医药卫生引用本文复制引用
齐俊丽,常晓荣,汤俊岭,耿瑶,刘学军..镍钛根管锉的横截面与根管壁微裂纹产生的相关性分析的体外研究[J].安徽医科大学学报,2017,52(6):930-933,4.基金项目
河南省医学科技攻关普通项目(编号:201403119) （编号:201403119）
