机用镍钛锉根管预备的临床应用研究

目的：比较机用镍钛锉与手用K型锉根管预备的临床应用。方法：将牙位相同、诊断相同，全身情况类似的患者按随机配对原则分入甲乙两组，甲组为镍钛锉预备组；乙组为K型锉预备组，每组50例患者。结果：对于单根管牙齿，使用机用镍钛锉进行根管预备，所用时间与传统手用K型锉根管预备相比无显著差异，对于双根管牙及磨牙而言，采用机用镍钛进行根管预备所用时间明显少于使用传统手用K型锉根管预备，根管预备一周内，使用机用镍钛锉根管预备与传统手用K型锉根管预备术后反应无显著差异，结论：传统手用K型锉预备根管相比，机用镍锉具有省时省力的优点。

Comparison between a rotary Nikel——Titanium file and stainless-steel K-file instrumentation in root canal preparation: a clinical study

Objective To compare the results of root canal preparation using rotary nickel-titanium files to the results obtained using traditional stainless-steel K files by hand clinically.Methods 100 adult patients who were diagnosed to receive root canal treatment were divided into two groups based on the randomly-paired principle.There were 50 patients in each group.In group A,root canals were instrumented with rotary Ni-Ti files in crown-down mode,when 0.04 taper files and 0.06 taper files were used alternatively until 40# 0.04 taper files instrumentation was finished.In group B,root canals were instrumented with traditional stainless-steel K files to 40# by hand.Instrumentation time of each canal was recorded.Results For single-root teeth,the instrumentation time was not significantly different between the two groups.For the double-root teeth and molars,instrumentation time in group A was significantly less than group B.Conclusion Compared with instrumentation by hand with traditional stainless-steel K files,instrumentation with rotary Ni-Ti files is less time-consuming and more convenient.