维吾尔族人下颌第二恒磨牙牙根及根管系统的解剖形态  

Anatomical morphology of the root and root canal system of the second permanent molar in the Uygur people

作　　者：刘芳 顾永春 郭宏 汤颖 刘超 沈忆芬 LIU Fang;GU Yongchun;GUO Hong;TANG Ying;LIU Chao;SHEN Yifen(Department of Stomatology,The First People′s Hospital of Urumqi,Urumqi City 830000,China;Central Lab,The Ninth People′s Hospital of Suzhou,Suzhou 215200,China;Department of Periodontics,The Stomatological Hospital of Urumqi,Urumqi City 830000,China)

机构地区：[1]乌鲁木齐市第一人民医院口腔科,乌鲁木齐新疆维吾尔自治区830002 [2]苏州市第九人民医院中心实验室,苏州江苏215200 [3]乌鲁木齐市口腔医院牙周病科,乌鲁木齐新疆维吾尔自治区830002

出　　处：《口腔疾病防治》2019年第8期522-526,共5页Journal of Prevention and Treatment for Stomatological Diseases

基　　金：江苏省口腔疾病研究重点实验室开放课题基金项目(JSKLOD-KF-1705)

摘　　要：目的研究维吾尔族人下颌第二恒磨牙牙根及根管系统的解剖特点,为临床提供参考。方法从新疆维吾尔自治区各医院采集维吾尔族患者拔除的下颌第二恒磨牙125颗。显微CT扫描后进行三维重建。观测牙根数目、根管类型(Weine分类法及C型根管的范兵分类法)及侧副根管的发生状况。结果牙根数目及类型在男女间差异无统计学意义(Х^2=1.277,P=0.259)。双根发生率为70.4%(n=88),近中根根管形态多为2-1型(29.5%),其次为2-2型及1-1型根管(均为26.1%);远中根根管形态绝大多数为1-1型(96.6%)。单根发生率为28.8%,C形根管(n=28)及非C形根管(n=8)分别占牙总数的22.4%和6.4%。1颗牙出现远舌根变异(三根);侧副根管的发生率为65.2%。结论维吾尔族人下颌第二磨牙以双根为主,单根及根管融合(包括C形根管)的发生率较低;双根时多为近中根双根管、远中根单根管。Objective To study the anatomical characteristics of the root and root canal system of the mandibular second permanent molar in the Uygur people and provide a reference for clinical practice.Methods A total of 125 mandibular second permanent molars were extracted from Uygur patients in hospitals in the Xinjiang Uygur Autonomous Region.Three-dimensional reconstruction was performed after micro-CT scanning.The number of root canals,the root canal type(Weine classification and Fan′s C-shaped canal classification)and the occurrence of lateral accessory canals were observed.Results A sex difference was not detected in the root number or root form(Х^2=1.277,P=0.259).The incidence of 2-rooted molars was 70.4%(n=88);type 2-1 canals were most common in the mesial root,with an incidence of 29.5%,followed by type 1-1 and 2-2 canals(each with an incidence of 26.1%),and the distal root mostly had a type 1-1 canal(96.6%).The incidence of single-rooted molars was 28.8%,and the frequency of C-shaped(n=28)and non-C-shaped(n=8)single-rooted molars was 22.4%and 6.4%,respectively.A three-rooted molar was detected in one case.The incidence of accessory canals was 65.2%.Conclusion Uygur mandibular second molars are mainly composed of two roots,and the incidence of a single root and root canal fusion is low(including C-shaped canals).Two-rooted molars frequently have two mesial canals and one distal canal.

关 键 词：维吾尔族人 下颌第二恒磨牙 根管系统 C形根管 显微CT 

分 类 号：R781.33[医药卫生—口腔医学]