锥形束CT用于骨性安氏Ⅱ类1分类错（牙合）畸形切牙区唇侧牙槽骨开窗及骨开裂的研究  

The incidence of fenestration and dehiscence on incisor region of Skeletal Class Ⅱ Division 1 malocclusions： a cone beam CT study

作　　者：赵岩[1,2] 屈振宇 刘琳 胡炜[3] 李刚 

机构地区：[1]北京大学口腔医学院·口腔医院口腔颌面放射科,100081 [2]辽宁省大连市口腔医院放射线科,116021 [3]北京大学口腔医学院正畸科,100081 [4]辽宁省大连市口腔医院放射线科,116021 [5]辽宁省大连市口腔医院正畸科,116021

出　　处：《中华口腔正畸学杂志》2016年第1期2-7,共6页Chinese Journal of Orthodontics

摘　　要：目的 应用锥形束CT（cone beam computed tomography,CBCT）研究成人骨性安氏Ⅱ类1分类错（牙合）畸形切牙区唇侧牙槽骨开窗及骨开裂的发生率及分布情况,为正畸治疗提供一定参考依据.方法 随机选取2013年7月至2015年5月间北京大学口腔医院正畸科进行锥形束CT扫描的2 376例患者中,临床诊断为骨性安氏Ⅱ类1分类错（牙合）畸形的65例成人患者进行上、下颌切牙区唇侧牙槽骨开窗及骨开裂的统计学分析.结果 在样本人群中,骨开窗和骨开裂的发生率分别为75.38％（49/65）和86.15％（56/65）.在不同骨开窗类型中,小于等于根长1/3的骨开窗约占骨开窗总数的76.88％.在不同骨开裂类型中,范围在2-4 mm的最多,约占骨开裂总数的77.13％.在样本牙齿中,切牙区唇侧牙槽骨开窗的发生率为30.78％,以左上颌侧切牙最高（7.69％）,右上颌侧切牙次之（6.92％）,右上颌中切牙最低（1.15％）;切牙区唇侧牙槽骨开裂的发生率为36.15％,右下颌中切牙最高（9.62％）,左下颌中切牙次之（8.27％）,下颌的发生率高于上颌.男性与女性切牙唇侧骨开窗与骨开裂的发生率无显著性差异.结论 骨性Ⅱ类1分类错（牙合）患者中,切牙区唇侧牙槽骨开窗和骨开裂的发生率较高,且多数骨开窗范围小于等于根长1/3,骨开裂在2-4 mm之间.Objective To investigate the incidence and sites of alveolar bone fenestration and dehiscence in incisor region of adult skeletal class Ⅱ division 1 malocclusions with CBCT images,and to guide orthodontic clinical works.Methods 2 376 CBCT images of orthodontic patients in Peking University Hospital of Stomatology from July 2013 to May 2015 were randomly selected.65 of them were Skeletal Class Ⅱ Division 1 malocclusions.Their fenestration and dehiscence incidence in incisor regions were studied and statistically analyzed.Results The incidence of fenestration in incisor region of Skeletal Class Ⅱ Division 1 malocclusions was 30.78%.The most commonly affected tooth was the left upper lateral incisor,while the least was the right upper central incisor.The incidence of dehiscence in incisor region was 36.15%.The most commonly affected tooth was the right lower central incisor （9.62%）,followed with the left lower central incisor （8.27%）.The incidence of fenestration and dehiscence in the sample was 75.38% （49/65）and 86.15% （56/65）,respectively.Among the fenestrations,76.88% limited to the 1/3 root length,while 77.13% of the dehiscence was within 2-4 mm.No significant difference was found between genders for fenestration and dehiscence in incisor regions.Conclusions Alveolar bone fenestration and dehiscence is a common in skeletal Class Ⅱ Division 1 patients,and most of the fenestration was less than one third of the root length.

关 键 词：骨开窗 骨开裂 骨性安氏Ⅱ类1分类错(牙合)畸形 切牙区 

分 类 号：R783.5[医药卫生—口腔医学]