One of them was used as control and the other were treated with bilateral detachment of the masseter muscle.

• 实验组山羊双侧下颌骨咬肌附着从骨面剥离,附着区骨面平均分为两部分,分别保留原骨面或去除皮质骨,暴露松质骨,咬肌原位缝合。