上颌第一磨牙近中颊侧第二根管的锥形束CT影像学研究

目的利用锥形束CT（CBCT）研究活体上颌第一磨牙近中颊侧第二根管（MB2）的发生率和根管影像,为临床根管治疗提供一定的影像学依据。方法按年龄段分组,各随机选择70张,共420张锥形束CT扫描图像,截取上颌第一磨牙根管口横断面影像,针对上颌第一磨牙近中颊侧根管数目、近中颊侧第二根管根管口的位置进行分析研究。结果锥形束CT能在根管口横断面上清晰显示上颌第一磨牙近中颊侧第二根管的存在和分布。结论锥形束CT可以真实反映上颌第一磨牙近中颊侧第二根管的解剖形态,图像清晰,给临床工作提供了重要的、有利的参考。

Cone-beam CT imaging study of the second mesiobuccal root canal in maxillary first permanent molar

Objective To study the incidence of the second mesiobuccal root canal(MB2) in maxillary first permanent molar by cone-beam CT,and to provide imaging evidence for the clinical treatment of root canal.Methods The patients were grouped by age,70 images were randomly chosen from each group,all of 420 cone-beam CT images.The cross-sectional images of the root canal in maxillary first permanent molar were intercepted.The mesiobuccal root canal number of maxillary first permanent molar and the position of the second mesiobuccal root canal were analyzed and studied.Results Conebeam CT could clearly show the existence and distribution of the second mesiobuccal root canal in maxillary first permanent molar in the cross-sectional images of root canal.Conclusion Cone-beam CT can truly reflect the anatomical shape of the second mesiobuccal root canal in maxillary first permanent molar,and the image is clear,which provide an important and favorable reference for the clinical work.