Methods : The electromyography of masticatory muscles was studied in 40 patients with unilateral posterior teeth loss and 40 volunteers with complete dentition as control.

• 方法： 对40例单侧上颌后牙缺失患者组成的缺牙组和40例牙列完整的自愿者组成的对照组，进行肌电图检查。