Objective To evaluate the effect of the angle-splitting ostectomyfor the treatment of the mild or moderate enlarged mandibular angle with masseter musle hypertrophy.

• 目的评价应用改良下颌角外侧骨板矢状劈开去骨术矫治中轻度下颌角嚼肌肥大畸形的临床治疗效果。