上下颌骨因缺损或肿瘤手术后,缺损范围大时,修复体应做成中空基托减轻重量,以利固位.中空义齿的制作方法有多种,作者在长期的实践中总结出中空义齿的敞开式制作法.这种方法主要有以下优点:①技工操作简便易行,缺损腔填塞石膏易取出,不用制作塑料盖,一次装盒即可成功.②中空形态可任意成形,使空腔做到最大限度,有效减轻义齿重量.③接缝处用垫凝塑料结合可避免自凝塑料的变色.现将制作法介绍如下. The upper and lower jaw due to defects or tumor surgery, the scope of a large defect, the prosthesis should be made of hollow base to reduce weight, to facilitate retention. Hollow dentures made a variety of ways, the author concluded in the long-term practice hollow denture Of the open production method.This method has the following advantages: ① mechanic easy to operate, easy to remove the cavity filled gypsum, without making plastic cover, a box can be successful. ② hollow shape can be any shape, the cavity To maximize, effectively reduce the weight of the denture.③ seams with plastic condensate pad can be avoided from the self-curing plastic discoloration. Production methods are introduced below.