不同颈椎骨龄青少年下颌骨外斜线区骨量的锥形束CT评价  

Cone-beam CT evaluation of bone mass in the external oblique line of the mandible in adolescents with different cervical vertebral bone ages

作　　者：庄昕仪 彭源浩 喻婷 吕冬梅 温秀杰 程钎 Zhuang Xinyi;Peng Yuanhao;Yu Ting;Lyu Dongmei;Wen Xiujie;Cheng Qian(Department of Orthodontics,the Affiliated Stomatology Hospital of Southwest Medical University,Luzhou 646000,Sichuan Province,China;Department of Orthodontics,Chongqing Rytime Dental Hospital,Chongqing 401121,China)

机构地区：[1]西南医科大学附属口腔医院正畸科,四川省泸州市646000 [2]重庆瑞泰口腔医院正畸科,重庆市401121

出　　处：《中国组织工程研究》2024年第8期1253-1258,共6页Chinese Journal of Tissue Engineering Research

基　　金：西南医科大学自然科学研究项目(2020ZRQNB009),项目负责人:程钎;西南医科大学附属口腔医院青年基金(201810),项目负责人:程钎。

摘　　要：背景:微种植钉在青少年群体中的应用日益增多,但目前国内外关于青少年外斜线区骨量的研究却十分鲜见,未见对不同生长发育时期青少年外斜线区骨量的系统性研究。目的:运用锥形束CT对不同颈椎骨龄青少年下颌骨外斜线区骨量进行测量,探究不同颈椎骨龄青少年外斜线区骨量差异及该区域骨量与颈椎骨龄的相关性。方法:收集2020-2021年在西南医科大学附属口腔医院正畸科就诊的105例青少年患者矫治前的锥形束CT资料,采用颈椎成熟法分为CS3组(n=24)、CS4组(n=26)、CS5组(n=29)及CS6组(n=26)。应用Mimics Medical 21.0软件对青少年外斜线区进行三维重建,分别测量下颌骨右侧第一磨牙及第二磨牙釉牙骨质界下6,11 mm颊侧骨宽度,釉牙骨质界颊侧4,5 mm处骨高度,测量分4个层面:第1层面为下颌右侧第一磨牙近中根所在层面;第2层面为下颌右侧第一磨牙远中根所在层面;第3层面为下颌右侧第二磨牙近中根所在层面;第4层面为下颌右侧第二磨牙远中根所在层面。结果与结论:①在同组内,4组青少年外斜线区颊侧骨宽度均自第一磨牙近中向第二磨牙远中逐渐增大,釉牙骨质界下6 mm及11 mm颊侧不同层面间骨宽度比较差异均有显著性意义(P<0.05),且距釉牙骨质界下11 mm颊侧的骨宽度均大于6 mm处;4组青少年外斜线区颊侧骨高度自第一磨牙近中向第二磨牙远中逐渐增大,釉牙骨质界颊侧4 mm及5 mm处不同层面间骨高度比较差异均有显著性意义(P<0.05),且距釉牙骨质界颊侧4 mm处的骨高度均大于5 mm处;②在相同层面下,CS3组、CS4组、CS5组第4层面距釉牙骨质界下方11 mm颊侧骨宽度均小于CS6组(P<0.05);CS3组及CS4组第3层面釉牙骨质界颊侧4 mm及5 mm处骨高度、第4层面釉牙骨质界颊侧5 mm处骨高度均小于CS6组(P<0.05),CS3组第4层面距釉牙骨质界颊侧4 mm处骨高度也小于CS6组(P<0.05);③Spearman相关性分析显示,青少�BACKGROUND:The application of miniscrew in adolescents is increasing day by day,but at present,there are few studies on bone mass in the external oblique line of the mandible in adolescents at home and abroad,and there is no systematic study on bone mass in the external oblique line of the mandible in adolescents in different growth and development periods.OBJECTIVE:To measure the bone mass in the external oblique line of the mandible in adolescents with different cervical vertebral bone ages using a conebeam CT and to investigate the difference of bone mass in the external oblique line of the mandible in adolescents with different cervical vertebral bone ages and the correlation between bone mass in this area and the cervical vertebral bone age.METHODS:The cone-beam CT data of 105 adolescent patients before orthodontic treatment were collected and divided into CS3 group(n=24),CS4 group(n=26),CS5 group(n=29)and CS6 group(n=26)using the cervical vertebral maturation method.The adolescent mandibular buccal shelf was reconstructed by Mimics Medical 21.0 software.The width of buccal bone at 6 and 11 mm under the cemento-enamel junction and the bone height at 4 and 5 mm buccal to the cemento-enamel junction of right mandibular first and second molars were measured.The measured data were statistically analyzed.The measurement was made on four planes:plane 1 is the plane where the proximal mesial root of the mandibular right first molar is located;plane 2 is the plane where the distal mesial root of the mandibular right first molar is located;plane 3 is the plane where the proximal mesial root of the mandibular right second molar is located;and plane 4 is the plane where the distal mesial root of the mandibular right second molar is located.RESULTS AND CONCLUSION:In each group,the bone width on the buccal side of the external oblique line increased gradually from the first molar proximally to the second molar distally in adolescents,and the width of buccal bone at 6 and 11 mm under the cemento-enamel junction showed sig

关 键 词：颈椎骨龄 下颌外斜线区 骨量 微种植钉 锥形束CT 

分 类 号：R459.9[医药卫生—治疗学] R319[医药卫生—临床医学] R783.5