【摘要】 目的研究成人轻度骨性Ⅲ类错患者在拔除下颌第二磨牙矫治后软硬组织的变化。方法成人轻度骨性Ⅲ类错患者6例,38、48发育良好,在拔除下颌第二磨牙后采用直丝弓矫治器进行掩饰治疗。对治疗前后X线头颅侧位片进行测量分析。结果与矫治前相比,矫治后H角平均增大2.8°,UM-PP平均增加1.47 mm,LM-MP平均减小1.11 mm,SN-OP平均减小1.5°,下颌磨牙平均远中移动2.87 mm,前牙反均得到纠正,后牙建立了正常的咬合关系。结论成人轻度骨性Ⅲ类错病例通过拔除下颌第二磨牙的掩饰治疗可以取得较好的治疗效果。更多还原

【Abstract】 Objective To evaluate the dento-skeletal and profile changes in adult patients with Class Ⅲ malocclusion after camouflage orthodontic treatment with lower second molar extractions. Methods Six adult patients with Class Ⅲ malocculsion( 4 males,2 females,18. 4 ~ 24. 5 years old) were included in the study. They were treated by SWA after extraction of lower second molars and good occlusion relationship including third molars was established in all patients. Lateral cephalometric films taken at the beginning and at the end of treatment were analyzed using cephalometric analysis. Results After treatment,the profiles of all the patients were improved. The mean changes were as below: H angle was increased 2. 8°; UM-PP was increased 1. 47 mm and LM-MP was decreased 1. 11 mm,SN-OP angle was decreased 1. 5°,and the lower first molars was moved 2. 87 mm posteriorly. The upper incisors were labially inclined 3 ~ 11. 4°, but the lower incisors were lingually moved 6 ~ 9. 5 °. The cross bite of anterior teeth was corrected,and the normal occlusion relationship was established in every patient. There was no significant change about SN-MP and the face height. Conclusions A good result could be achieved in adult patients with mild Class Ⅲ malocclusion after orthodontic treatment with lower second molar extractions.更多还原