Lothian University Hospitals NHS Trust, Department of Orthodontics, Edinburgh University Postgraduate Dental Institute, Edinburgh, Scotland.
Am J Orthod Dentofacial Orthop. 2011 Mar;139(3):362-8. doi: 10.1016/j.ajodo.2009.05.035.
Our objective was to determine which factors were predictive of good long-term outcomes after fixed appliance treatment of Class II Division 1 malocclusion.
Two hundred seven patients with Class II Division 1 malocclusion were examined in early adulthood at a mean of 4.6 years after treatment with fixed appliances. The peer assessment rating index was used to evaluate dental alignment and occlusal relationships. The soft-tissue profile was assessed with the Holdaway angle.
Logistic regression identified 3 pretreatment variables that were predictive of a good facial profile (Holdaway angle) at recall: the lower lip to E-plane distance (P <0.001; smaller distance behind the E-plane means a better outcome), ANB angle (P = 0.001; smaller ANB means a better outcome), and extraction pattern (P = 0.026). Linear regression analysis showed that 2 pretreatment variables were predictive of a favorable PAR score at recall: SNB angle (P = 0.001; larger SNB means a better outcome) and extraction pattern (P = 0.034).
Three pretreatment cephalometric measures (lower lip to E-plane distance, ANB angle, and SNB angle) were predictive of the outcome in the treatment of Class II Division 1 malocclusion. The extraction pattern was also found to be a predictor of outcome.
我们的目的是确定哪些因素对固定矫治器治疗安氏Ⅱ类 1 分类错牙合的长期预后有预测作用。
207 例安氏Ⅱ类 1 分类错牙合患者，于矫治固定矫治器后平均 4.6 年的成年早期进行检查。采用同行评估分级指数评价牙列及咬合关系的整齐度，Holdaway 角评价软组织侧貌。
逻辑回归分析确定了 3 个治疗前变量可预测随访时的良好面型（Holdaway 角）：下唇至 E 平面距离（P<0.001；E 平面后距离越小，结果越好）、ANB 角（P=0.001；ANB 角越小，结果越好）和拔牙模式（P=0.026）。线性回归分析显示，2 个治疗前的头影测量指标可预测随访时的 PAR 评分：SNB 角（P=0.001；SNB 角越大，结果越好）和拔牙模式（P=0.034）。
3 个治疗前的头影测量指标（下唇至 E 平面距离、ANB 角和 SNB 角）可预测安氏Ⅱ类 1 分类错牙合的治疗结果。拔牙模式也是结果的预测因素。
