Micro-CT评价WaveOne预备根管后根管偏移的实验研究  

Micro-Computed tomography analysis of canal transportation after root canal preparation with Wave One and protaper

作　　者：张堃[1,2] 耿楠[1,2] 王轲[1,2] 李谨[1,2] 

机构地区：[1]南京医科大学口腔疾病研究江苏重点实验室 [2]南京医科大学附属口腔医院特诊科,江苏南京210029

出　　处：《口腔医学》2014年第11期823-827,共5页Stomatology

基　　金：江苏省科技厅自然科学基金项目(BK2010528);江苏高校优势学科建设工程资助项目(2014-37);2014年江苏省卫生厅医学科研立项课题项目(H201433)

摘　　要：目的以Micro-CT为研究工具评价Wave One镍钛器械对根管偏移的控制能力和中心定位能力。方法将40颗离体前磨牙随机分为A、B、C、D 4组,Wave One(A组)、机用Protaper(B组)、手用Protaper(C组)3组采用根向技术预备根管;手用不锈钢K锉(D组)按照标准技术预备根管。预备前、后均用Micro-CT扫描并对近中、远中根管壁(双根管以颊侧根管计)的厚度进行测量,然后利用Gambill提出的公式进行根管偏移和轴中心率的计算。结果根管预备后根管偏移量:A组小于其它3组(P<0.05);轴中心率:A组大于其它3组(P<0.05)。结论 Wave One在预备根管时,能够较好的维持根管原始走向,减少根管中心的偏移,具有临床使用价值。Objective To evaluate the apical canal transportation and centralizing ability of NiTi instruments WaveOne after root ca- nal preparation by Miero-CT. Methods Forty extracted premolar teeth were randomly divided into four groups ： A, B, C,D. Root canals were respectively prepared using WaveOne（ group A） , motor ProTaper（ group B） , hand ProTaper（ group C） nickel-titanium instruments with crown-down technique and using the stainless steel hand K-files with standardized technique （ group D）. A series of preoperative and postoperative images were taken by Miero-CT. Canal transportation and centralizing ability were measured with reference to the dis- tance between the non-instrumented portion of the root canals and the mesial and distal periphery of the root. （ Double root canals only recorded the buecal one. ） Results In terms of canal transportation after preparation, Group A was less than the other three groupsP 〈 0.05 ）. The centring ratio value of group A was larger than that of the other three groups （P 〈 0.05 ）. Conclusions Within the limita- tion of this present study,WaveOne can well maintain the original root canal path and center in the preparation of root canal. Therefore, it has practical value for clinical use.

关 键 词：MICRO-CT 根管偏移 镍钛器械 根管预备 

分 类 号：R781.05[医药卫生—口腔医学]