目的：总结高频电刀在正畸导萌低位阻生磨牙开窗术中的应用。
To investigate the advantage in using the dental electrosurgery unit in the operation of exposing impacted molars before orthodontic uprighting.
目的探讨下颌前倾、水平阻生磨牙的正畸治疗方法，评估其效果。
Objective To assess the treatment method and outcome of mesially or horizontally impacted mandibular molars.
目的：3年随防观察近中阻生的下颌第三磨牙萌出情况与其倾斜角度的关系。
Objective: To measure changes in angular position and eruption status of mesially impacted mandibular third molars (M3) during 3-year follow-up period.
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