骨性Ⅱ类和Ⅲ类高角错患者下切牙区的牙槽骨形态分析  

Morphological analysis of alveolar bone of anterior mandible in high-angle skeletal class Ⅱ and class Ⅲ malocclusions assessed with cone-beam computed tomography

作　　者：马静 江久汇[1] MA Jing;JIANG Jiu-hui(Department of Orthodontics, Peking University School and Hospital of Stomatology ＆ National Engineering Laboratory for Digital and Material Technology of Stomatology ＆ Beijing Key Laboratory of Digital Stomatology, Beijing 100081, Chi-na;Department of Orthodontics, Beijing Chongwen Hospital of Stomatology, Beijing 100062, China)

机构地区：[1]北京大学口腔医学院.口腔医院正畸科口腔数字化医疗技术和材料国家工程实验室口腔数字医学北京市重点实验室,北京100081 [2]北京市崇文口腔医院口腔正畸科,北京100062

出　　处：《北京大学学报（医学版）》2018年第1期98-103,共6页Journal of Peking University:Health Sciences

基　　金：国家自然科学基金(81571002);北京市自然科学基金(7162203)资助~~

摘　　要：目的:应用锥束计算机体层摄影术(cone-beam computed tomography,CBCT)研究成年骨性Ⅱ类及Ⅲ类高角错患者下切牙区牙槽骨形态的差异。方法:从2015年10月至2017年8月在北京大学口腔医院就诊并且拍摄了CBCT的患者中筛选出骨性Ⅱ类及Ⅲ类高角错患者各31名,对患者下切牙区牙槽骨的高度、牙槽骨面积及牙槽骨厚度进行测量,并应用SPSS 17.0软件进行独立样本t检验分析。结果:两组相比,骨性Ⅲ类组患者的下切牙牙槽骨唇侧根尖区的牙槽骨面积及唇侧总牙槽骨面积均低于骨性Ⅱ类组患者,下切牙唇侧根尖处的牙槽骨厚度也低于骨性Ⅱ类组患者,差异有统计学意义(P<0.05)。骨性Ⅲ类组患者下切牙牙槽骨舌侧釉牙骨质界(cementoenamel junction,CEJ)下6 mm处牙槽骨面积、舌侧根尖区及舌侧总牙槽骨面积均低于骨性Ⅱ类组患者。在下切牙牙槽骨舌侧CEJ下4 mm、6 mm以及舌侧根尖处的牙槽骨厚度,骨性Ⅲ类组患者也低于骨性Ⅱ类组患者,差异有统计学意义(P<0.05)。结论:骨性Ⅲ类高角错患者下切牙区牙槽骨的面积及厚度在唇舌侧根尖区明显小于骨性Ⅱ类高角错患者,在对其进行前牙的唇舌向移动时尤其要注意转矩的控制,以防止根吸收及骨开窗、骨开裂的发生。Objective ： To evaluate the difference o f features o f alveolar bone support under lower ante-rior teeth between high-angle adults wi th skeletal class Ⅱ malocclusions and high-angle adults presenting skeletal class Ⅲ malocclusions by using cone-beam computed tomography （CBC T）. Methods： Patients who had taken the images of CBCT were selected from the Peking University School and Hospital o f Sto-matology between October 2015 and August 2017. The CBCT archives from 62 high-angle ad ult cases without orthodontic treatment were d iv ide d into two groups based on th e ir sagittal jaw relationships ： skele-tal class Ⅱ and skeletal class Ⅲ . ver t ica l bone le vel （ VBL ） , alveolar bone area （A B A ） , and the w idth of alveolar bone were measured respectively at the 2 mm , 4 mm , 6 mm below the cemento-enamel ju n c -tion （CEJ） level and at the apical lev el. Af te r th a t, independent samples -tests were conducted fo r sta-tistical comparisons. Results ： The ABA o f the man dibular alveolar bone in the area o f lower anterior teeth was significantly thinner in the patients o f skeletal class IH than those o f skeletal class I I , especial-ly in terms of the apical ABA , total ABA on the la b ia l and l in g u a l sides and the A B A at 6 mm below CEJ level on the l ingual side （ P 〈 0. 05 ） . The thickness o f the alveolar bone o f man dibular anterior teeth was significantly thinner in the subjects o f skeletal class IH than those o f skeletal class H,especially regar-ding the apical level on the labial and l in g u a l side and at the le vel o f 4 m m , 6 mm below CEJ le vel on the lingual side （P 〈0. 05 ） . Conclusion ; The AB A and the thickness o f the alveolar bone o f man dibular an-terior teeth were signif icant ly thinner in the group o f skeletal class IH adult patients w i th high-angle when compared with the sample of

关 键 词：错[牙合] 牙槽骨 锥束计算机体层摄影术 

分 类 号：R783.5[医药卫生—口腔医学]