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目的用回顾分析方法,评价拔除上颌第一前磨牙及下颌第二磨牙矫治骨性Ⅱ类高角型开的临床疗效。方法选取12例骨性Ⅱ类开病例,男4例,女8例,平均年龄15.6岁,拔除上颌第一前磨牙及下颌第二磨牙后,使用直丝弓矫治技术对其进行矫正治疗。治疗前后拍摄X线头颅侧位片,并对其进行头影测量分析。结果矫正治疗结束后,12例患者均取得了满意的治疗效果,侧貌明显改善,覆覆盖正常,平面发生逆时针旋转,下颌平面角变小。结论拔除上颌第一前磨牙及下颌第二磨牙矫治骨性Ⅱ类开临床疗效可靠,效果较稳定。
Objective To evaluate the clinical effect of maxillary first premolars and mandibular second molars in the treatment of skeletal class Ⅱ high angle opening by retrospective analysis. Methods Twelve patients with type Ⅱ bleb were selected, including 4 males and 8 females, with an average age of 15.6 years. The maxillary first premolar and mandibular second molar were removed and treated by straight wire arch correction. Before and after treatment of X-ray filming the lateral radiographs, and its cephalometric analysis. Results After correction treatment, all the 12 patients achieved satisfactory therapeutic effect. The lateral appearance was improved obviously. The coverage was normal, the anticlockwise rotation occurred in the plane, and the plane angle of the mandible became smaller. Conclusion The removal of the maxillary first premolar and mandibular second molar treatment of skeletal Class Ⅱ clinical effect is reliable, the effect is more stable.