Objective:To evaluate the curative effects of the straignt wire appliance with the face mask and to investigate the effective therapeutie tool of the skeletal anterior crossbite.

• 目的:评价上颌前方牵引器结合直丝弓技术矫正前牙反颌的疗效,探寻临床对前牙反颌的有效治疗方法。