常用手持根管扩大器械根管成形作用的研究  

A study on the shape of prepared canal of commonly used hand endodontic instruments

作　　者：朱亚琴[1] 王晓仪[1] 

机构地区：[1]上海第二医科大学口腔医学院口腔内科教研室

出　　处：《上海口腔医学》1998年第1期37-39,53,共4页Shanghai Journal of Stomatology

摘　　要：用计算机图象处理方法对三种常用手持根管扩大器械包括Ｋ型扩大针、Ｋ型锉和Ｈ型锉扩大直或轻度弯曲（＜２０°）的离体单根牙后，离根尖孔３ｍｍ（根尖段）、６ｍｍ（根中段）、９ｍｍ（根颈段）的根管形态变化和根管偏移情况，结果表明：不同水平近远中向或唇舌向根管偏移无显著性差异，各组根管形态变化亦无显著性差异。另外，对重度弯曲（２５～３０°）的人工根管的根尖偏移观察表明，Ｈ锉组根尖偏移最明显，Ｋ型扩大针组最小。文中还就如何合理。Straight or slightly curved single root canals of teeth (<20 degree) were instrumentated with three commonly used hand endodontic instruments,which included K reamer,K file and H file.The shape of prepared canal and root canal deviation at three levels were measured by computerized digital image processing program.The results demostrated that any significant differences were not found on root canal deviation in either labio lingual or mesio distal direction at each level,and that the shape of prepared canal was not different significantly.Apical transportation of the severely curved artificial root canals(25￣30 degree) showed that H file was the most severe,K reamer was the least.It is suggested in this article how we select endodontic instruments rationally and effectively.

关 键 词：根管扩大器械 根管偏移 根管成形术 根管疾病 

分 类 号：R781.330.5[医药卫生—口腔医学]