应用根管显微镜处理钙化根管的效果评价

目的：评价根管显微镜在钙化根管治疗中的临床应用。方法选择根管显微镜配合手用C型先锋锉及乙二胺四乙酸（ethylene diamine tetraacetic acid ，EDTA）治疗的钙化根管369个，根据钙化牙位以及根管内钙化部位的不同，比较钙化根管疏通成功率，并进行统计学分析。结果310个钙化根管疏通，总成功率达84.01%。前牙组、前磨牙组和磨牙组疏通成功率分别为94.78%、85.98%和74.15%。磨牙组疏通成功率明显小于前牙组（c2=19.658，P＜0.05），钙化部位在直根管及根管弯曲以上的疏通成功率为96.85%，钙化部位在根管弯曲以下的疏通成功率为39.76%，差异有统计学意义（c2=156.113，P＜0.05）。结论根管显微镜下配合手用C型先锋锉及EDTA耐心疏通钙化根管疗效显著，但牙位及根管内钙化部位对疏通效果影响很大。

Evaluation of the use of dental operating microscope in the treatment of calcified canals

Objective To evaluate the use of dental operating microscope in treating calcified canals. Methods 369 calcified canals were treated with C?Pilot files and ethylene diamine tetraacetic acid (EDTA) under dental operating microscope. The canals were grouped based on the calcified teeth site and calcified location in canals, and then the suc?cess rates of negotiating were analyzed with c2 test. Results 310 of 369 calcified canals were negotiated under dental operating microscope, the negotiating rate was 84.01%. For the anterior, premolar and molar, the negotiating rate were 94.78%, 85.98%, and 74.15% respectively. There were significant differences between anterior and molar teeth (c2 =19.658, P<0.05). When the calcification was located in straight canals or above the root canal curvature, canals were negotiated with a success rate of 96.85%. However, it decreased to 39.76%when the calcified portion located below the root canal curvature (c2 = 156.113, P<0.05). Conclusion It is an effective way to use dental operating microscope and C?Pilot files to treat calcified canals, but the therapeutic effects might be affected by sites of the teeth and the calci?fied location in canals.