由于口腔颌面部功能性器官比较集中,又相互连接,重要器官常常被肿瘤浸润,手术常使病人致残,切除范围越大,致残越重。若术前、术后用放射治疗配合,可以达到以下目的:①缩小肿瘤体积,便于手术切除。因肿瘤较大时常与周围器官发生浸润粘连,放疗能使庙粘连变为纤维性粘连,增加手术切除率。②消灭切缘外的亚临床灶,减 Because the oral and maxillofacial functional organs are relatively concentrated and connected to each other, vital organs are often infiltrated by the tumor. The surgery often causes the patient to be disabled. The greater the scope of resection, the heavier the disability. If preoperative and postoperative radiotherapy are used, the following objectives can be achieved: (1) Reducing the tumor volume and facilitating surgical resection. Because tumors often occur with the surrounding organs infiltration and adhesion, radiotherapy can make the temple adhesion into fibrous adhesions, increasing the surgical resection rate. 2 eliminate the subclinical foci outside the margin, minus