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目的用方丝弓矫治器矫治成人安氏Ⅱ1错畸形,观察矫治前后牙颌面的变化情况,以寻找一种矫治成人安氏Ⅱ1类错的简单有效的方法。方法安氏Ⅱ1类错21例,均采用方丝弓矫治器,上颌拔除第一双尖牙并采用横腭弓控制支抗,下颌不拔牙,或拔除单颗严重错位的下切牙,排齐整平上下牙列后内收上前牙,单独牵引上颌尖牙远中移动至与下颌尖牙形成中性关系,采用0.018×0.025不锈钢方丝弯制高低T形曲内收、压低并根腭向转距控制上切牙。后期常规精细调整。矫治前后X线头影测量其颌面部变化。结果21例都取得了令人满意的效果。上前牙突距平均减小6.3mm,下前牙突距平均减小0.2mm,前牙覆盖平均减小6.1mm;SNA角平均减小3.8°,SNB角平均减小0.4°,ANB角平均减小3.4°;覆颌基本恢复正常;上中切牙前颅底平面角平均减小13.3°;上前牙前突得到明显改善;尖牙为中性关系,磨牙完全远中关系。结论高低T形曲用于矫治成人安氏Ⅱ1错,能够内收、压低并转距控制上切牙,效果满意,是一种简单有效的方法。
Objective To treat adult Angle Ⅱ 1 malocclusion with square wire appliance and to observe the change of maxillofacial surface before and after orthodontic treatment in order to find a simple and effective method to correct Class Ⅱ 1 malocclusion in adults. Methods 21 cases of Class Ⅱ 1 malocclusion were treated with square arch appliance. The maxillary first unilateral canine was removed and the lateral palatal arch was used to control the support. The mandibular was not extracted, or the single severely dislocated incisor was removed. Flat upper and lower dentition after adduction on the anterior teeth, the maxillary canine alone to move the distal to the mandibular canine to form a neutral relationship, the use of 0.018 × 0.025 stainless steel square wire bending T-shaped adduction, depression and palate turn Control the upper incisor. After the conventional fine-tuning. The changes of maxillofacial area were measured by X-ray before and after treatment. Results 21 cases have achieved satisfactory results. The average distance between the anterior teeth was 6.3mm, the average distance between the anterior teeth was 0.2mm, the anterior teeth covered an average of 6.1mm, the SNA angle was reduced by 3.8 °, the average SNB angle was 0.4 °, the average ANB angle Reduced by 3.4 °. The overlying maxilla basically returned to normal. The plane angle of anterior skull base of the upper and middle incisors decreased by an average of 13.3 °. The anterior protrusion of the anterior superior was significantly improved. The canine was of neutral and molars completely distant. Conclusion High and low T-shaped curve is used to correct the Angle Ⅱ 1 malocclusion in adults, to adduction, depression and torque control on the incisors, the effect is satisfactory, is a simple and effective method.