【摘要】 目的利用锥形束CT观察并评估上颌第二恒磨牙近中颊根根管形态。方法收集551例上颌第二恒磨牙患者的锥形束CT资料,记录性别、年龄、牙位、近颊根根管数目和形态,采用Vertucci分类法记录根管构型,并记录根管弯曲位置、弯曲方向和弯曲角度。结果 551例中,近中颊根第二根管(MB2)的发生率为25.41%(140/551),男性多于女性;上颌第二恒磨牙近中颊根根管大多向远中及腭侧弯曲,弯曲根管占87.54%(604/690),57.57%(397/690)的弯曲发生在根中1/3,重度弯曲占19.28%(133/690)。结论上颌第二恒磨牙近中颊根MB2的发生率较高,中、重度弯曲根管较多。锥形束CT可在各层面显示根管系统解剖形态。更多还原

【Abstract】 Objective To evaluate the root canal morphology of mesiobuccal root canal of maxillary second permanent molar with cone beam computed tomography(CBCT).Methods CBCT data of 551patients were collected,the gender,age,tooth position of the patients,the number and morphology including the curvature position,curvature direction and curvature angle of the mesiobuccal root canals were recorded.The root canal configuration was categorized and compared according to Vertucci’s criteria.Results The incidence rate of second mesiobuccal canal(MB2) of the maxillary second permanent molar was 25.41%(140/551),higher in men than in women.The mesiobuccal root canal in the maxillary second molar mostly curved to distoclusion and palatal,57.54%(397/690) of curvatures occurred in the middle 1/3root region,and the curved root canal accounted for 87.54%(604/690),while severe curved canal accounted for 19.28%(133/690).Conclusion The incidence rate of the MBI in the maxillary second molar is high,moderate and severe curved root canals are common.CBCT can show the morphology of root canal at all levels.更多还原