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本研究的目的为探讨乳牙期与替牙期单侧后牙反的矫治方法，提高其疗效。以１５名单侧后牙反伴有颜面不对称的患儿为观察对象，采用活动矫治器，进行矫治前后的后前位Ｘ线头影测量分析。结果表明，单侧后牙反矫正后，下颌正中结构偏斜程度有明显改善，下颌骨两侧综合长度差亦明显减小。本研究结果提示，对乳牙期与替牙期单侧后牙反的早期矫治，可以便颜面不对称得到明显改变。
The purpose of this study is to explore the deciduous dentition and unilateral posterior teeth anti-correction method to improve its efficacy. Fifteen unilateral pedicled anti-companion children with facial asymmetry were used as observational objects. An anterior appliance was used to measure and analyze the anteroposterior X-ray before and after treatment. The results show that the anti-orthodontics of the unilateral posterior teeth has a significant improvement of skewness of the median mandibular structure and a significant reduction of the combined length difference of the mandibular sides. The results of this study suggest that the early correction of unilateral posterior teeth during deciduous period can significantly change facial asymmetry.