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目的探讨安氏Ⅲ类错伴牙列严重拥挤矫治的方法及设计。方法选自我科安氏Ⅲ类错伴严重拥挤病例共12例,男5例,女7例,平均年龄16.2岁。所有的病例分两步完成,第一步:上颌配戴垫,下颌拔除34、44,采用标准直丝弓矫治技术解除下颌拥挤、反抬;第二步:上颌拔除14、24,同样采用标准直丝弓矫治技术解除上颌拥挤。结果矫治时间为16～23月,平均为20月,矫治后患者牙列整齐,覆覆盖正常,咬关系良好,面部侧貌协调。结论通过分步完成上下颌拔牙减数,首先可以解除前牙反关系。
Objective To investigate the method and design of severe crowding correction of Class Ⅲ malocclusion with dentition. Methods selected from the Division I Class Ⅲ Malocclusion with severe congestion in a total of 12 cases, 5 males and 7 females, with an average age of 16.2 years old. All cases were completed in two steps, the first step: the maxillary pad wear pad, mandibular removal 34,44, the use of standard straight wire correction technology to relieve the jaw crowded, anti-lift; the second step: maxillary extraction 14,24, the same Standard straight arch correction technology to relieve maxillary crowding. Results The treatment time ranged from 16 to 23 months, with an average of 20 months. The orthodontic patients had normal dentition, normal coverage, good bite, and coordination of facial features. Conclusion Through the step-by-step completion of maxillary and mandibular extraction, the first anti-off-line system can be lifted anterior teeth.