成人骨性Ⅱ类上颌中切牙区三维解剖位置关系  

Clinical study on three-dimensional anatomical position relationship of adult skeletal classⅡmaxillary central incisors

作　　者：刘莹[1] 诸葛南山 LIU Ying;ZHUGE Nanshan(Department of Orthodontics,Stomatology Hospital of Taian City,Taian 271000,China)

机构地区：[1]泰安市口腔医院口腔正畸科,山东泰安271000

出　　处：《山东第一医科大学（山东省医学科学院）学报》2024年第9期554-557,共4页Journal of Shandong First Medical University ＆ Shandong Academy of Medical Sciences

基　　金：泰安市科技创新计划项目(2022NS226)。

摘　　要：目的运用锥形束计算机断层扫描研究成年骨性Ⅱ类上颌中切牙区的牙根形态、牙槽骨形态、切牙管与上颌中切牙牙根的位置特点,为成年骨性Ⅱ类患者错[牙合]矫治提供一定的理论参考。方法选取50例符合标准的成年正畸患者(25例骨性Ⅱ类且安氏Ⅱ类1分类患者,25名骨性Ⅰ类且安氏Ⅰ类患者),应用软件对两组患者的上颌中切牙根冠比、牙槽骨形态数据及切牙管与上颌中切牙牙根的位置进行测量分析。结果骨性Ⅱ类上颌中切牙根冠比小于骨性Ⅰ类患者,且差异有统计学意义(P<0.05);上颌中切牙根尖牙槽骨总厚度要比骨性Ⅰ类患者薄,差异有统计学意义(P<0.05)。两组患者在根尖水平面及切牙管腭侧平面切牙冠宽度大于根间距,且骨性Ⅱ类切牙孔宽度较骨性Ⅰ类更加宽大,差异均有统计学意义(P<0.05)。骨性Ⅱ类患者切牙孔腭侧平面和根尖平面上,上颌中切牙近中缘到切牙管的距离分别为(3.88±1.10)、(3.89±1.12)mm,比骨性Ⅰ类患者平均值小,但差异无统计学意义(P>0.05)。结论临床上正畸拔牙掩饰性矫治骨性Ⅱ类成年患者应评估上颌中切牙区三维解剖形态及位置关系。Objective:To study the root morphology,alveolar bone morphology,tooth canal and root position characteristics of maxillary central incisor in adult patients with skeletal classⅡmalocclusion by using cone beam computed tomography(CBCT),and to provide some theoretical reference for the correction of adult skeletal classⅡmalocclusion.Methods:A total of 50 adult orthodontic patients were included in this study(25 patients with skeletal classⅡand angleⅡ1and 25 patients with skeletal classⅠand angleⅠ),the relevant data of maxillary central incisor root-crown ratio,alveolar bone morphology,incisor canal and root position of maxillary central incisor were measured and analyzed by software.Results:The root-crown ratio of skeletal classⅡmaxillary central incisors was lower than that of skeletal classⅠpatients,and the difference was statistically significant(P<0.05.The total alveolar bone thickness of maxillary central incisor root cusp was thinner than that of skeletal classⅠpatients,and the difference was statistically significant(P<0.05).In the root apex level of the maxillary central incisors(R)and the palatal opening level of the incisal canal(I),the width of the incisal crown was larger than the root distance,and the width of the incisal foramina in skeletal classⅡwas wider than that in skeletal classⅠ,with the statistical significance(P<0.05).At I plane and R plane,the distances from the mesial margin of the maxillary central incisor to the incisor canal in skeletal classⅡpatients were(3.88±1.10)and(3.89±1.12)mm respectively,which were smaller than the mean values of skeletal classⅠpatients,but there was no statistical difference(P>0.05).Conclusion:It is necessary to evaluate the three-dimensional anatomical morphology and position of the maxillary central incisor region in the clinical treatment of adult patients of class II bone with masked orthodontic extraction.

关 键 词：根冠比 切牙管 牙槽骨厚度 骨性Ⅱ类 

分 类 号：R783.5[医药卫生—口腔医学]