上颌第一磨牙解剖结构的锥形束CT研究  

A cone beam CT study of the anatomical structure of the maxillary first molar

作　　者：李嘉宁 张倩霞 周子超 王胜朝 蒋文凯 LI Jianing;ZHANG Qianxia;ZHOU Zichao;WANG Shengchao;JIANG Wenkai(State Key Laboratory of Oral&Maxillofacial Reconstruction and Regeneration,National Clinical Research Center for Oral Diseases,Shaanxi Key Laboratory of Stomatology,Department of Endodontics,School of Stomatology,Air Force Medical University,Xi'an 710032,China)

机构地区：[1]口颌系统重建再生全国重点实验室,国家口腔疾病临床医学研究中心,陕西省口腔医学重点实验室,空军军医大学口腔医院牙体牙髓病科,陕西西安710032

出　　处：《空军军医大学学报》2024年第10期1092-1098,共7页Journal of Air Force Medical University

基　　金：国家自然科学基金面上项目(82270973);国家科技基础资源调查专项(2018FY101002)。

摘　　要：目的应用锥形束计算机断层扫描法(CBCT)研究上颌第一磨牙的牙体及根管解剖结构,为上颌第一磨牙的临床诊疗提供数据支持。方法根据纳入及排除标准,选择上颌第一磨牙完整的18~25岁健康人群共计401(男196,女205)例为研究对象,拍摄CBCT影像,使用SmartVPro软件测量分析牙体形态、根管形态,采用SPSS 26.0软件对数据进行统计学处理。结果右侧上颌第一磨牙平均全长为(20.22±1.72)mm,左侧上颌第一磨牙平均全长为(20.24±1.74)mm;全长、冠宽、颈宽在左右侧上颌第一磨牙间无明显差异(P>0.05),左侧上颌第一磨牙冠长、根长、冠厚、颈厚显著大于右侧上颌第一磨牙(P<0.05);男性全长、根长、冠厚、颈厚、冠宽、颈宽等显著大于女性(P<0.05)。左右侧上颌第一磨牙根管形态对称,三根型牙根最常见,发生率为98.75%,双根型牙根的发生率为1.25%;根管数目最常见为四根管,发生率为63.47%,其次为三根管,发生率为35.78%;近颊第二根管发生率为63.84%。近颊根管分型以VertucciⅣ型根管为主,在左右侧上颌第一磨牙中分别占比为62.59%、64.59%,远颊根及腭根则以VertucciⅠ型根管为主,远颊根VertucciⅠ型根管占比为97.00%,左右侧上颌第一磨牙腭根VertucciⅠ型根管占比则分别为98.75%、98.50%。结论上颌第一磨牙牙体形态在性别间存在显著差异,且根管系统复杂多变,相关数据有望为上颌第一磨牙牙体牙髓病的防治提供指导。Objective To use cone beam computed tomography(CBCT)to study the anatomical structure of dentition and root canals in maxillary first molars,so as to provide data support for the clinical diagnosis and treatment of maxillary first molars.Methods Based on the inclusion and exclusion criteria,a total of 401(196 males and 205 females)healthy individuals aged 18 to 25 years with intact maxillary first molars were selected as the study objects.CBCT imaging technique was used to collect the requisite data,and SmartVPro software was used to measure and analyze the tooth and root canal morphology.SPSS 26.0 software was used for statistical analysis.Results The average length of the right maxillary first molar was(20.22±1.72)mm,and the average length of the left maxillary first molar was(20.24±1.74)mm.There were no significant differences in total length,crown width,and neck width between left and right maxillary first molars(P>0.05).However,the left maxillary first molar was found to have a significantly greater crown length,root length,crown thickness,and neck thickness in comparison to the right maxillary first molar(P<0.05).The total length,root length,crown thickness,neck thickness,crown width,and neck width were found to be significantly larger in males compared to females(P<0.05).The root canal morphology in the left and right maxillary first molars revealed symmetrical characteristics,with the triple-root type being the most common,accounting for 98.75%,followed by the double-root type at 1.25%.The majority of cases exhibited four root canals(63.47%),followed by three root canals(35.78%),with an incidence of second mesiobuccal canal at 63.84%.The majority of proximal buccal were identified as Vertucci type IV,accounting for 62.59%and 64.59%of the left and right maxillary first molars,respectively.The distal buccal and palatal root canals were predominantly categorized as Vertucci type I,accounting for 97.00%of the distal buccal root canals Vertucci type I.The palatal root canals Vertucci type I of the left and r

关 键 词：上颌第一磨牙 锥形束CT 牙体形态 根管形态 近颊第二根管 

分 类 号：R781[医药卫生—口腔医学]