成年高角女性下前牙区牙槽骨形态分析  

Morphological analysis of mandibular anterior alveolar bone in high⁃angle adult females assessed with cone⁃beam computed tomography

作　　者：杨偲 全淑琪 邢珂 梅宏翔 李娟[1] YANG Cai;QUAN Shuqi;XING Ke;MEI Hongxiang;LI Juan(State Key Labora-tory of Oral Diseases&National Clinical Research Center for Oral Diseases,Department of Orthodontics,West China Hospital of Stomatology,Sichuan University,Chengdu 610041,China)

机构地区：[1]口腔疾病研究国家重点实验室,国家口腔疾病临床医学研究中心,四川大学华西口腔医院正畸科,四川成都610041

出　　处：《口腔疾病防治》2022年第1期33-38,共6页Journal of Prevention and Treatment for Stomatological Diseases

基　　金：国家自然科学基金面上项目(31670951、31971240);四川大学华西口腔医院探索与研发项目(LCYJ2019⁃22)。

摘　　要：目的探讨成年高角女性下前牙区牙槽骨形态特征及其增龄性改变,为临床正畸治疗提供参考。方法选取142例未经正畸治疗的成年女性的头颅侧位片和CBCT资料,根据面部生长型分为80例高角组(∠MP⁃FH>30°,FHI<62%)和62例均角组(20°≤∠MP⁃FH≤30°,62%≤FHI≤65%)。扩充高角组样本量至164例并根据年龄分为青年组(87例)和中年组(77例),以进一步研究高角女性组内差异。应用Dolphin Imaging 11.9软件对各组下切牙区牙槽骨附着水平、根尖区牙槽骨厚度及下切牙唇倾度进行测量,使用SPSS 22.0软件进行统计学分析。结果与均角组相比,高角组下切牙根尖区唇舌侧及总牙槽骨厚度更小(P<0.05),牙槽骨附着水平更低(P<0.05);高角组及均角组下切牙唇倾度与舌侧牙槽骨厚度均呈负相关(高角组:r=-0.251,P=0.025;均角组:r=-0.428,P=0.001)。与高角中年组相比,高角青年组下切牙区唇舌侧牙槽骨附着水平更高(P<0.05);但两组根尖区牙槽骨厚度比较,差异无统计学意义(P>0.05)。结论成年高角女性下切牙根尖区牙槽骨厚度薄、附着水平低,增龄性变化和下切牙唇倾度差异都与下切牙区牙槽骨形态存在相关性,正畸医师设计牙移动方案时应重视。Objective To investigate the features of alveolar bone morphology of mandibular central incisors in high⁃angle adult females using cone⁃beam computed tomography(CBCT)and evaluate the influence of aging in these pa⁃tients.Methods CBCT and lateral cephalometric images of 142 untreated adult female patients were selected and grouped by facial growth pattern.The number of high⁃angle cases was increased to 164 to further explore the difference within high⁃angle adult females who were divided into two groups according to age.The indexes of alveolar bone height and thickness in the lower incisor region and inclination of the lower incisors were measured by Dolphin software.The data was statistically analyzed.Results Compared with the average⁃angle group,the high⁃angle group had a lower alve⁃olar bone attachment level(P<0.05)and less bone thickness at the root apex level(P<0.05).The thickness of lingual alveolar bone decreased with labial inclination of the lower incisors in both the high⁃angle and average⁃angle groups(r=-0.251,P=0.025;r=-0.428,P=0.001,respectively).In hyperdivergent female patients,the middle⁃aged group had a lower attachment level of alveolar bone than the young group(P<0.05),but no significant difference in bone thickness at the root apex level(P>0.05)was found between the two groups.Conclusion High⁃angle adult females had thinner mandibular anterior alveolar bone with significantly lower attachment levels.Aging and inclination of lower incisors influenced bone morphology and should be taken into careful consideration.

关 键 词：牙槽骨形态 锥形束CT 下颌中切牙 切牙唇倾度 牙槽骨厚度 成年女性 高角 增龄性变化 附着丧失 正畸矫治 

分 类 号：R78[医药卫生—口腔医学]