四肢恶性骨肿瘤或巨大骨良性肿瘤切除后常留下较大骨质缺损,自体骨移植是治疗骨缺损的常用方法,但自体骨量有限,且取骨会给患者带来一些并发症。同种异体骨移植是应用时间较长且已证明是一种有效的重建方法[1],其优点为骨来源丰富,有多种形状及大小选择,骨端可获得牢固的生物愈 Malignant bone tumors of extremities or giant benign bone often leave large bone defects after resection, autologous bone graft is a common method of treatment of bone defects, but the limited amount of autologous bone, and bone extraction will bring some complications to patients. Bone allograft transplantation is a long time and has proven to be an effective reconstruction method [1], which has the advantage of rich source of bone, a variety of shapes and sizes, bone ends can get solid biological more