正畸治疗安氏Ⅲ类错伴下颌偏斜的临床研究

Orthodontic Treatment Effects on Class Ⅲ Malocclusion with Mandibular Deviation

目的探讨治疗安氏Ⅲ类错伴有单侧的后牙反、锁和单侧前牙反的牙源性下颌偏斜的有效方法。方法选择安氏Ⅲ类错伴单侧的后牙反、锁和单侧前牙反等牙源性下颌偏斜患者21例,年龄8~25岁,平均15.5岁。单侧后牙反、锁引起的下颌偏斜通过上颌扩弓、上下牙交互牵引纠正宽度不调,促使下颌自行复位;前牙反通过Ⅲ类牵引予以解除。结果 21例患者均取得良好的矫治效果,治疗后颜面对称性和咬合关系恢复正常,颏点偏斜平均减少（2.9±0.6）mm,因长期错导致的下颌骨偏斜亦得到了明显改善。结论牙源性下颌偏斜,经过合理正畸治疗,随着单侧后牙反、锁及单侧前牙反的解除可得到明显的改善。

Objective To investigate the treatment outcome of Class Ⅲ malocclusion with odontogenic mandibular deviations caused by unilateral cross bite or unilateral posterior locked bite or anterior cross bite.Methods Twenty-one patients（8 males,13 females,aged 8-15 years） with odontogenic mandibular divations caused by unilateral cross bite or unilateral posterior locked bite or anterior cross bite were selected.Mandibular divations with unilateral cross bite or unilateral posterior locked bite was treated with expansion of maxillary arch or intermaxillary reciprocal traction to help the mandible returning to normal position.mandibular divations with anterior cross bite was treated with Class Ⅲ intermaxillary traction.Results In all cases,good occluding relation were achieved and facial symmetry was greatly improved after orthodontic treatment.Conclusion Class Ⅲ malocclusion with mandibular divations caused by unilateral cross bite or unilateral posterior locked bite or anterior cross bite can be corrected successfully by orthodontic treatment.