三种镍钛根管预备系统对弯曲根管成形能力的比较

Comparison of the forming ability of three kinds of nickel-titanium root canal preparation system

目的比较镍钛Reciproc、K3、Pro-Taper系统及手动不锈钢系统K-File在预备重度弯曲磨牙根管成形的效果。方法将40颗近颊根管重度弯曲的下颌第一磨牙随机分为4组,每组10颗。分别用Reciproc、K3、ProTaper系统及手动不锈钢系统K-File进行根管预备,记录4组根管预备前后影像中器械尖端所在的位置,比较4组根管弯曲度的变化、根管内工作长度的变化及操作时间。结果 4组操作时间比较,Reciproc组操作时间最短,KFile组操作时间最长。Reciproc、K3、Pro-Taper预备后各组中根管内工作长度变化差异无统计学意义。根管预备前,4组根管弯曲度差异无统计学意义;根管预备后,Reciproc、K3、Pro-Taper组根管弯曲度变化小于K-File组。结论应用Reciproc、K3、Pro-Taper镍钛器械预备后牙重度弯曲根管时效率较高,成形能力较强。

Objective To compare the effects of nickel titanium Reciproc,K3,Pro-Taper system and stainless steel system K-File in the preparation of the root canal forming of the severe bending molar.Methods Forty first molar with severe bending of the mandibular canal were randomly divided into four groups.Reciproc,K3,Pro-Taper system and manual stainless steel system K-File were used for root canal preparation.The position of the tip of the instruments in the 4groups before and after the root canal preparation were recorded.The changes of root canal curvature,the change of working length in root canal and the operation time were compared between the 4groups.Results Among 4groups,the operation time of Reciproc group was the shortest,and the stainless steel manual K-File time was the longest.There was no significant difference in the changes of the working length of the root canal after Reciproc,K3 and ProTaper in each group.Before the root canal preparation,there was no significant difference in root canal curvature between the 4groups.After root canal preparation,the changes in Reciproc,K3,root canal curvature Pro-Taper groups are less than K-File group.Conclusion The applications of Reciproc,K3,after Pro-Taper nickel-titanium instruments prepared for molar curved root tube forming were with high efficiency and strong ability.