EDTA润滑剂在减缓机用镍钛锉疲劳方面的临床研究

目的 通过记录根管预备操作中ProTaper机用镍钛锉折断前使用次数,探讨乙二胺四乙酸(EDTA)在根管预备中减缓机用镍钛器械疲劳方面的的应用价值。方法 收集大量离体磨牙和新ProTaper机用镍钛锉40套(S1-F2)共200支,Pro-Taper机用镍钛锉随机分为两组,对照组使用ProTaper机用镍钛锉+双氧水预备根管,实验组用EDTA+ProTaper机用镍钛锉根管预备,比较两组器械折断前不同使用次数情况。结果 实验组折断前使用次数均高于对照组,两组折断前使用次数差异具有统计学意义(P<0.05)。结论 在熟练掌握正确的使用技术后,在根管预备中应用EDTA润滑剂可减缓机用镍钛器械疲劳程度,从而减少断针的机率。

Clinical analysis of EDTA effect on reducing the fracture of ProTaper Nickel titanium mechanical files during root canal preparation

Objective To study the effect of EDTA on reducing the fracture of ProTaper Nickel titanium mechanical files during root canal preparation by recording the times of application.Methods 40 sets of new ProTaper Nickel titanium mechanical files(S1-F2,totally 200 files) were collected,20 sets of the new ProTaper Nickel titanium mechanical files and EDTA in test group were used during root canal preparation,and the other 20 sets took routine preparation in control group.To observe the difference of times of appli...