文章摘要
黄云生,孙凯瑞,姜刘鎏,周 鹏,陈圣焱,魏 昕.下颌第一恒磨牙远中舌侧根管口定位的锥体束CT分析[J].南京医科大学学报,2019,(2):284~290
下颌第一恒磨牙远中舌侧根管口定位的锥体束CT分析
Cone⁃beam computed tomography in locating the distolingual canal orifice of the mandibular first molars
投稿时间:2018-10-27  
DOI:10.7655/NYDXBNS20190228
中文关键词: 下颌第一恒磨牙  远中舌侧根管  CBCT  ROC曲线
英文关键词: mandibular first molar  distolingual canal  cone⁃beam computed tomography  ROC curve
基金项目:江苏省高校“青蓝工程”(2013);江苏高校优势学科建设工程资助(2014?37);国家自然科学基金(81271151;81371156)
作者单位
黄云生 南京医科大学江苏省口腔疾病研究重点实验室南京医科大学附属口腔医院牙体牙髓病科江苏 南京 210029 
孙凯瑞 南京医科大学江苏省口腔疾病研究重点实验室南京医科大学附属口腔医院牙体牙髓病科江苏 南京 210029 
姜刘鎏 南京医科大学江苏省口腔疾病研究重点实验室南京医科大学附属口腔医院牙体牙髓病科江苏 南京 210029 
周 鹏 南京医科大学江苏省口腔疾病研究重点实验室南京医科大学附属口腔医院牙体牙髓病科江苏 南京 210029 
陈圣焱 南京医科大学江苏省口腔疾病研究重点实验室南京医科大学附属口腔医院牙体牙髓病科江苏 南京 210029 
魏 昕 南京医科大学江苏省口腔疾病研究重点实验室南京医科大学附属口腔医院牙体牙髓病科江苏 南京 210029 
摘要点击次数: 18
全文下载次数: 45
中文摘要:
      目的:采用受试者工作特征(receiver operating characteristic,ROC)曲线分析下颌第一恒磨牙的锥体束CT(cone?beam computed tomography,CBCT)数据,分析远中舌侧根管口发生率及探寻其定位规律。方法:随机抽取江苏省口腔医院放射科行CBCT检查的患者图像数据。记录下颌第一恒磨牙的远中根管数目,测量各根管口间的距离(近中颊侧根管口MBO、近中舌侧根管口MLO、远中颊侧根管口DBO、远中舌侧根管口DLO)和形成的角度(MBO?DBO连线与MBO?MLO连线的夹角∠DBML、MBO?DBO连线与MBO?DLO连线的夹角∠DBDL)。通过ROC曲线筛选出下颌第一恒磨牙远中舌侧根管口存在的最佳诊断指标,并计算其临界值。对远中舌侧根管口及其他各根管口间形成的角度、距离之间比例关系进行分析,定位远中舌侧根管口。结果:共获取300例患者572颗下颌第一恒磨牙CBCT图像数据。远中出现双根管共213例,比例为37.2 %。下颌第一恒磨牙远中根管分组在性别、年龄、左右侧牙位上的分布无统计学差异(P > 0.05)。∠DBML为判断下颌第一恒磨牙存在远中舌侧根管口的最佳指标,其ROC曲线下面积为0.988,其诊断的临界值为72.143°。∠DBDL和∠DBML比值为0.551;MBO?DLO和MLO?DBO比值为1.035。结论:下颌第一恒磨牙远中舌侧根管发生率较高,下颌第一恒磨牙∠DBML为远中舌侧根管口存在的诊断指标。∠DBML和∠DBDL角度和MBO?DLO和MLO?DBO距离比例关系可为临床上定位下颌第一恒磨牙远中舌侧根管口提供重要依据。
英文摘要:
      Objective:To investigate the incidence and location of distolingual canal orifice in permanent mandibular first molars using cone?beam computed tomography(CBCT)and the relevant receiver operating characteristic(ROC)analysis. Methods:A total of 572 mandibular first molars were chosen from 300 patients undergoing CBCT scan in Department of Radiology,Stomatology Hospital of Jiangsu. The number of the distal roots and the root canals of mandibular first molars were recorded by the analysis of the CBCT data using SIMPLANT software,and the distance and angle(∠DBML and ∠DBDL)between the root orifices were measured accordingly. The best diagnostic index for the presence of the distolingual canal orifice in the permanent mandibular first molars was selected by ROC curve,and the critical value was calculated by Youden index. Then,the relationships between the angles and distances formed by the distolingual canal orifice and other root canals orifice were analyzed. Results:The prevalence of two distolingual canals in mandibular first molars was 37.2%(213/572). The balance test of the classification of distal roots showed no statistically significant difference in gender,age and side(P > 0.05). ROC analysis showed a high diagnostic accuracy of 0.988 of the area under the ROC curve,which suggested that the ∠DBML could be used as a prediction data to the presence of distolingual canal orifice. The critical value for the diagnosis of distolingual canal orifice of mandibular first molars by ∠DBML is 72.143°. The distolingual canal orifice can be located using the ∠DBDL and ∠DBML angle ratio(∠DBDL=0.551×∠DBML),and the MBO?DLO and MLO?DBO distance ratio(MBO?DLO=1.035 × MLO?DBO). Conclusion:The angle of ∠DBDL and the distance of MLO?DBO in permanent mandibular first molars could be used clinically for the location of the distolingual canal orifice.
查看全文   查看/发表评论  下载PDF阅读器
关闭