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目的研究安氏Ⅱ类1分类错患者治疗前的头颅侧位片,分析不同垂直骨面型的Ⅱ类患者切牙唇倾度的异同,从而指导临床的错诊断、设计、治疗以及预后判断。方法选取安氏Ⅱ类1分类错成人患者149例,治疗前拍摄头颅侧位片,根据前颅底平面与下颌平面的夹角(SN/MP)将其分为3组,进行测量后分析各组切牙唇倾度差异。结果 3组样本切牙唇倾度不同。高角组上切牙较为直立,低角组下切牙较为唇倾,差异有统计学意义。结论在安氏Ⅱ类1分类错患者中,垂直骨面型不同,切牙唇倾度也不尽相同,在临床中应针对矢状骨面型以及垂直骨面型共同分析,从而获得完善的治疗效果。
Objective To investigate the cephalometric radiographs of patients with Class Ⅱ division 1 malocclusion prior to treatment and to analyze the similarities and differences of incisors ’labial incisors’ inclination in different types of patients with Class Ⅱ malocclusion, so as to guide the clinical diagnosis, design, treatment and prognosis . Methods A total of 149 adult patients with Class Ⅱ division 1 malocclusion were enrolled in this study. The cephalometric films were taken before treatment and divided into 3 groups according to the angle of anterior skull base plane and mandibular plane (SN / MP) The difference of incisor lip inclination in each group. Results Three groups of incisors had different degrees of inclination. The incisors in the high-angle group were more upright, and the incisors in the low-angle group were more lip-depressing. The difference was statistically significant. Conclusion In Class Ⅱ division 1 malocclusion patients, the vertical bone surface type, incisor lip inclination is not the same, should be in clinical for sagittal bone surface type and vertical bone surface type common analysis, so as to improve Therapeutic effect.