异种骨和人工骨修复骨肿瘤性骨缺损

背景：自体植骨是修复骨肿瘤刮除后骨缺损最理想的材料和方法，但存在增加手术创伤，取骨部位的后遗症如感染和疼痛及自体骨的取量有限等缺点。目的：分析硫酸钙人工骨和异种骨修复良性骨肿瘤刮除后骨缺损的临床疗效。方法：选择26例良性骨肿瘤患者，其中骨巨细胞瘤8例，内生软骨瘤5例，纤维组织细胞瘤4例，骨纤维异样增殖症3例，非骨化性纤维瘤2例，骨囊肿2例，动脉瘤样骨囊肿和软骨母细胞瘤各1例。12例采用单一硫酸钙骨粒填充肿瘤切除后的骨缺损，6例采用单一异种骨条填充肿瘤切除后的骨缺损，8例采用硫酸钙骨粒＋异种骨条填充肿瘤切除后的骨缺损。治疗后1周内、3个月、1年拍X射线片检查，了解植骨愈合情况。结果与结论：治疗后随访36-72个月，发现硫酸钙骨粒的降解发生较早，一般治疗后1个月就开始出现骨粒降解，3个月大部分已降解完毕并有骨替代发生，1年骨修复塑型良好；异种骨条3个月后降解并有骨替代发生，植骨充填物边缘模糊，6个月后骨缺损及充填物之间边界变模糊，有融合现象，1年骨缺损内密度均匀，骨小梁形成明显，骨修复良好；骨粒＋骨条混合植骨者介于单纯硫酸钙骨粒和单纯异种骨条之间，出现骨粒部分先降解先修复、骨条部分后降解后修复，一般术后1年达到骨性愈合。说明硫酸钙人工骨和异种骨在骨肿瘤性骨缺损修复应用中的效果良好，在良性骨肿瘤刮除后植骨可以替代自体骨植骨。

Xenograft and calcium sulphate in treating benign bone tumor

BACKGROUND：Autologous bone graft is the best method to repair bone defects after tumor curettage, but its shortcomings are as folows： increased surgical trauma, sequelae at bone graft site such as infection and pain, and a limited amount of autologous bone. OBJECTIVE：To analyze the effectiveness of xenograft and calcium sulphate artificial bone in treating bone defects after benign bone tumor removed. METHODS：Totaly 26 cases of benign bone tumor were selected, including 8 cases of giant celltumor, 5 of enchondroma, 4 of fibrous histiocytoma, 3 of bone fibrous dysplasia, 2 of non-ossifying fibroma, 2 cases of bone cysts, 1 of aneurysmal bone cyst and 1 of aneurysmal bone cyst and 1 case of chondroblastoma. Of the 26 cases, 12 cases underwent calcium sulphate pelets alone to fil bone defects after benign bone tumor removed, 6 cases were subjected to xenograft alone, and 8 cases were treated with calcium sulphate pelets combined with xenograft. The X-rays were taken at 1 week, 3 months, and 1 year after the operation in al patients to assess the bone healing process. RESULTS AND CONCLUSION：Al the patients were folowed up for 36-72 months. The absorption of calcium sulphate appeared to be absorbed earlier, the earlier absorption appearance could be observed as earlier as 1 month after the implantation, and most calcium sulphate was absolved and replaced by new bone at 3 months after the operation. The xenograft bone was degraded at 3 months post implantation and new bone formed.＆amp;nbsp;Osseo integration of the graft was observed at the periphery of the implant at 6 months post implantation. One year post implantation, trabecular bone was observed at the site with uniform bone density. In the combined group, thecalcium sulphate pelets were absorbed earlier and new bone formed earlier than the calcium sulphate alone group, and the xenograft absorbed later than the calcium sulphate pelets. Generaly, bony union was detectable 1 year after operation. These findings indicate that xenograft and calcium sulphate in treating benign bone tumor have acquired good results, which can be used as a substitute of autologous bone.