三种镍钛根管预备系统对弯曲根管成形能力的比较

[摘要] 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 、 Pro-Taper 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, K-File 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。

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

［Abstract］ ObjectiveTo 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. MethodsForty 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 4 groups 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 4 groups. ResultsAmong 4 groups, 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 Pro Taper in each group. Before the root canal preparation, there was no significant difference in root canal curvature between the 4 groups. After root canal preparation, the changes in Reciproc, K3, root canal curvature Pro Taper groups are less than K File group.ConclusionThe applications of Reciproc, K3, after Pro Taper nickel titanium instruments prepared for molar curved root tube forming were with high efficiency and strong ability.