锥形束CT在发现上颌第一磨牙近中颊根第二根管中的作用

Clinical study of the second mesiobuccal canal in maxillary first molars

目的探讨锥形束CT(CBCT)对提高上颌第一磨牙近颊第二根管(MB2)发现率的作用。方法选取2017年1月至2018年12月在合肥市第三人民医院进行根管治疗的136例上颌第一磨牙,按病人是否同意在根管治疗术前行CBCT检查分成两组,试验组69例病牙术前拍摄CBCT,对照组67例病牙术前未拍摄CBCT,进行根管治疗,记录近颊根管数目,比较两组MB2发现率。结果试验组MB2发现率为55.1%,对照组MB2发现率为35.8%,两组相比差异有统计学意义(P<0.05)。结论CBCT可显著提高上颌第一磨牙MB2发现率,有助于根充适充,提高根管治疗的成功率。

Objective To investigate the clinical incidence of second mesiobuccal(MB2)canal in maxillary first molars and the effect of cone beam computed tomography(CBCT)on locating MB2 canal.Methods 136 maxillary first molars in The Third People’s Hospital of Hefei from January 2017 to December 2018 were chose.The patients were divided into two groups according to whether the patients agreed to CBCT before root canal therapy.69 maxillary first molars in test group were examined with CBCT and 67maxillary first molars in compare group were examined with Xray dental film before root canal treatment.Each case was recorded the number of mesiobuccal canals.The clinical incidence of MB2 in two groups were compared.Results The overall clinical incidence of MB2 in test group and control group was 55.1%and 35.8%and there was significant difference between the two groups(P<0.05).Conclusion The clinical incidence of MB2 can be improved by CBCT effectively.It could increased the obturation quality and the efficiency of root canal therapy.