目的 探讨C形先锋锉联合乙二胺四乙酸(ethylene diamine tetraacetic acid,EDTA)在下颌后磨牙钙化根管疏通中的应用。方法 选取2014-10至2017-10在解放军总医院口腔医学中心口腔内科就诊的患者78例共89颗下颌后磨牙,共284个钙化根管随机分为两组,治疗组采用C形先锋锉联合EDTA进行根管疏通,对照组采用普通K锉联合EDTA进行根管疏通,比较两组根管疏通成功率,根管偏移、根管侧穿、器械分离发生率。结果 治疗组根管疏通成功率为84.72%,根管偏移发生率为12.50%;对照组根管疏通成功率为65.71%,根管偏移发生率为11.43%,治疗组根管疏通成功率高于对照组,差异有统计学意义(P＜0.01),两组根管偏移发生率差异无统计学意义。结论 C形先锋锉联合EDTA能够提高钙化根管疏通率,值得在临床中推广。

Objective To study the therapeutic effect of C-pilot files in combination with ethylene diamine tetraacetic acid (EDTA) when used for dredging molars with calcified root canals.Methods Eighty-nine mandibular posterior molars with 284 root canals from 78 patients who were treated in our department between October 2014 and October 2017 were randomly divided into two groups. The calcified root canals in the treatment group were dredged with C-pilot files in combination with EDTA, and those in the control group were dredged with ordinary stainless-steel K files with EDTA. The success rate of root canal dredging and incidence of root canal deviation, root canal-side wear and instrument fracture were observed.Results The success rate of root canal dredging in the treatment group was 84.72%, and the incidence of root canal deviation was 12.50%,compared with 65.71% and 11.43% in the control group, so the success rate of root canal dredging in the treatment group was high, and the difference was statistically significant (P<0.01), but there was no significant difference in the incidence of root canal deviation between the two groups.Conclusions The success rate of root canal dredging can be improved using C-pilot files and EDTA.