决定成年女性双颌前突治疗成功的变量研究

Cephalometric Variables to Determine Future Success of Correction of Young Female Adult Patients with Bimaxillary Protrusion

目的:分析双颌前突患者治疗前头影侧位片,探讨决定其治疗成功的骨性和牙性变量。方法:采用Win-ceph7.0软件对21例成年女性双颌前突患者进行头影测量分析。两独立样本t检验分析治疗前各指标的统计学差异,逐步判别分析法寻找对治疗结果具有明显预测作用的变量。结果:具有明显差别的变量有APDI,PNS-ANS,腭平面角等。对治疗结果具有预测功能的变量为:APDI,U1-APOG,POG-NB。结论:Ⅰ类骨面型的趋势,发育良好的颏部和小的上中切牙突距,对双颌前突的成功治疗具有明显的预测作用。

Objective： To investigate the differences in initial skeletal and dental characteristics of bimaxillary protrusion （ BP）patients to determine poor or good results. Methods： Lateral cephalometric films of twenty - one young adult female patients with BP taken at the beginning and the end of the treatment were analyzed with WincephT. 0 cephalometric anlaysis. Two independent samples t test was performed to evaluate the significant differences in initial skeletal and dental characteristics. Stepwise discriminant analysis was performed to find decisive predictors. Results： The significant differences in initial skeletal and dental characteristics of BP patients were APDI, PNS - ANS, palatal plane angle, and etc. Stepwise discriminant analysis to find decisive predictors were APDI,U1 - APOG and POG - NB. Conclusion： To get a better result with orthodontic treatment, more protrusive chin （Pog- NB）,littler maxillary central incisor protrusive instance （U1 - APOG）, and skeletal class I malocclusion tendency （APDI） seemed to be necessary.