Methods:The amount,capacity and implanted site of expander were selected by means of the site,range and perifocal condition of cervical cicatrix.

• 方法:根据颈部瘢痕的部位、范围和病灶周围情况选择扩张器的数量、容量与埋植部位;注水过程中采用扩张器托以防止其移位;