英语语法分析

Methods: One-stage reconstruction was carried out for defects caused by radical dissection of buccolabial cancer in 5 aged cases.

方法：对5例老年人唇颊部恶性肿瘤术后致唇颊部大部组织缺损，采用颞浅血管额支蒂皮瓣一期修复。