黑龙江省汉族人下颌第一磨牙远舌根发生率的锥形束CT研究

目的:研究黑龙江省汉族人下颌第一恒磨牙的远舌根发生率。方法:采用锥形束CT扫描成像技术拍摄下颌第一恒磨牙113颗,对扫描图像进行三维重建,并选择不同方向的断层观察研究远舌根发生率。结果:在113颗下颌第一恒磨牙中,远舌根的发生率为42.5%(48/113),其中男性发生率为43.8%(28/64),女性发生率为40.8%(20/49);左侧发生率为38.6%(17/44),右侧发生率为44.9%(31/69),性别与部位没有显著性差异。结论:黑龙江省汉族人下颌第一恒磨牙牙根形态变异较大,掌握其特点有助于提高根管治疗的成功率。

Investigation of prevalence of distolingual root in mandibular permanent first molars among the Han nationality in Heilongjiang province by CBCT

Objective To investigate the prevalence of distolingual root in mandibular permanent first molars among the Han nationality in Heilongjiang province.Methods Cone beam computer tomography was used to observe mandibular first permanent molar,and the scanning three-dimensional image was viewed and analyzed to evaluate the prevalence of distolingual root.Results The prevalence of distolingual root in mandibular permanent first molars was 42.5%,and the occurrence of it did not differ significantly between the males(43.8%,28/64) and females(40.8%,20/49),such as left side(38.6%,17/44) and the right side(44.9%,31/69).Conclusion The morphology of roots in mandibular first permanent molar among the Han nationality in Heilongjiang province was great variance.Knowledge of it can improve the success rate of root canal therapy.