骨性Ⅲ类错前牙区牙槽骨开裂和牙槽骨开窗发生率的锥形束CT研究  

The prevalence of dehiscence and fenestration on anterior region of skeletal Class Ⅲ malocclusions:a cone-beam CT study

作　　者：孙良 王博[1] 房兵[1] 

机构地区：[1]上海交通大学医学院附属第九人民医院.口腔医学院口腔颅颌面科上海市口腔医学重点实验室,上海200011

出　　处：《上海口腔医学》2013年第4期418-422,共5页Shanghai Journal of Stomatology

基　　金：国家自然科学基金(10972142);上海市科学技术委员会资助项目(08411961600);上海市高校创新团队发展计划

摘　　要：目的:探讨骨性Ⅲ类错前牙区唇侧牙槽骨开裂和骨开窗的发生率及其分布情况。方法:选择2012年5月就诊的成人骨性Ⅲ类错连续病例44例,其中男19例,女25例,上、下前牙共523颗。应用锥形束CT(cone beamcomputed tomography,CBCT)研究前牙区牙根周围牙槽骨状态,并使用测量软件进行定位分析牙槽骨厚度,检查牙根骨开窗、骨开裂的发生率。采用SAS 8.02软件包对数据进行统计学处理。结果:骨性Ⅲ类错前牙区唇侧牙槽骨开裂的发生率为61.57%,骨开窗的发生率为31.93%,骨缺损(牙槽骨开裂或牙槽骨开窗)的发生率为77.44%。其中下颌骨(58.52%)较上颌骨(41.48%)好发,所占比例尤以下颌尖牙最高(21.23%),上中切牙最低(6.17%)。男性与女性在多数前牙唇侧骨开裂和骨开窗的发生率无显著差异,男性在下颌中切牙和下颌侧切牙的发生率较女性高。结论:骨性Ⅲ类错就诊的病例中,前牙区牙槽骨开裂及骨开窗发生率较高,牙槽骨开裂和骨开窗在正畸过程中是否是牙根吸收或牙槽骨吸收的潜在因素,仍需进一步研究。PURPOSE： To investigate the prevalence and distribution of alveolar bone dehiscence and fenestration in anterior region of skeletal Class Ⅲ malocclusions.METHODS： The sample consisted of 19 males and 25 females with skeletal Class Ⅲ malocclusions selected from consecutive patients of Department of Oral and Cranio maxillofacial Science from May 1st to June 1st,2012.Five hundred and twenty-three teeth were examined by cone-beam CT（CBCT） in total while alveolar bone dehiscences and fenestrations were detected and measured using a new method.The data was processed using SAS8.02 software package.RESULTS： The prevalence of dehiscence was 61.57% in all teeth,while fenestration was 31.93% and the prevalence of defect（dehiscence or fenestration） was 77.44%.More defects were found in the mandible（58.52%） especially.The tooth site which was most commonly affected was lower canine,while the least was upper central incisor.No significant difference was found between both genders on most tooth sites of anterior region but more defects was found in lower central incisor and lower lateral incisor in male subjects.CONCLUSIONS： Alveolar defect is an extremely common finding in this sample.Whether alveolar defects such as dehiscence and fenestration are potential factors of root resorption and addition bone loss is still unclear,and further researches are needed.Supported by National Natural Science Foundation of China（10972142）,Research Fund of Science and Technology Commission of Shanghai Municipality（08411961600） and Program for Innovative Research Team of Shanghai Municipal Education Commission.

关 键 词：牙槽骨开裂 牙槽骨开窗 锥形束CT 骨性Ⅲ类错噁畸形 

分 类 号：R783.5[医药卫生—口腔医学]