Methods:Unilateral mandibular distraction was performed on 153 SD rats using an osteotomy from the sigmoid notch to the inferior border of mandible.

• 方法:对153只雄性SD大鼠施以单侧从乙状切迹至下颌骨下缘的纵向骨切开,在下颌角舌侧放置预制的甲基丙烯酸树脂块,安放并固定口外牵张器。