Objective: To study the distribution of stress caused by different mastication muscles in mandibular ramus operative area after sagittal split ramus osteotomy (SSRO), so as to guide the clinical work.

• 目的:探讨下颌升支矢状骨劈开术(SSRO)前徙下颌后,在不同颌周肌肉作用下,下颌升支手术区内的应力分布情况,从理论力学的角度为临床治疗提供依据。