【摘要】 目的:采用直丝弓矫治器矫治成年患者骨性AngleⅡ类2分类错牙合,以研究正畸治疗前后牙、颌硬组织变化,评价正畸矫治效果。方法:本文选择了8例AngleⅡ类2分类错牙合成年患者,男3例,女5例,年龄19~27岁,平均23.6岁。拔除双侧上颌第一双尖牙,运用直丝弓矫治器进行治疗,拍摄治疗前后X线头颅定位侧位片,进行治疗前后的X线头影测量研究。结果:治疗后SNA角减小,ANB角减小,U1-SN角增大,L1-MP角增大,U1-L1角减小。上颌切牙牙根及上颌基骨明显腭向移动,减小了上颌骨突度;下颌切牙牙冠明显唇向倾斜,代偿了下颌骨后缩。结论:骨性AngleⅡ类2分类错牙合患者经过上颌拔牙矫治后,面形有所改善,取得了理想的矫治效果。更多还原

【Abstract】 Objective: To investigate hard tissue changes and to evaluate the orthodontic effect induced by straight wire appliance for adult skeletal class Ⅱ division 2 malocclusion.Methods: 8 patients (3 males and 5 females, aged 19-27 years, mean age 23.6 years) were treated by straight wire appliance with upper two first premolars extracted. Pretreatment and post-treatment cephalometric radiograph were made and studied.Results: After treatment, SNA and SNB decreased, U1-SN and L1-MP increased,U1-L1 decreased. Root of upper incisors and base bone of maxilla palatally moved significantly. Crown of lower incisors labially moved, and mandibular retrusion was compensated.Conclusion: Obvious improvement of facial form can be achieved by orthodontic therapy in adult patient with skeletal class Ⅱ division 2 malocclusion.更多还原