上颌快速扩弓前方牵引联合固定矫治技术治疗早期骨性Ⅲ类错(牙合)的效果评价

摘要

目的 评价上颌快速扩弓前方牵引联合固定直丝弓矫治技术对早期骨性Ⅲ类错(牙合)畸形患者的临床治疗效果.方法 选择早期骨性Ⅲ类错(牙合)畸形的患者21例,利用上颌快速扩弓前方牵引后,全口进行固定矫治,平均治疗时间为24个月.比较治疗前后的头影测量数据.结果 21例患者矫治后反(牙合)关系解除,前牙覆(牙合)覆盖正常,侧貌面型得到明显改善.上颌骨有明显的矢状向生长,其中SNA角、ANB角、Wits值及L1-MP的变化差异显著(P＜0.01),SNB角、SN/MP、FH/MP、APDI及ODI的变化均有统计学意义(P＜0.05).结论 对于早期轻中度骨性Ⅲ类错(牙合)畸形的患者,通过上颌快速扩弓前方牵引联合固定矫治技术可以促进上颌骨的唇向生长,有效改善患者侧貌.%Objective This study was to evaluate the clinical effects of rapid maxillary expansion and maxillary protraction combined with straight wire appliance technology on early permanent dentition with skeletal Class Ⅲ malocclusion cases.Method 21 cases of early permanent dentition with skeletal Class Ⅲ malocclusion were treated with rapid maxillary expansion and protraction therapy,the average treatment time was 24 months.The cephalometric films before and after treatment were measured and compared.Results All patients' facical profile were improved greatly,overjet and overbite were established.Sagittal maxillary growth was found.SNA,ANB,Wits and L1-MP were significanly changed (P＜0.01),and statistically significant changes was found in SNB,SN/MP,FH/MP,APD and ODI (P＜0.05).Conclusion Rapid maxillary expansion and maxillary protraction with straight wire appliance technology can conspicuously promote sagittal growth of the maxilla and improve the profile of the patients.