复合人工骨用于兔腰椎横突间植骨的生物学评价  

Biological evaluation of recombinant human bone morphogenetic protein-2 artificial bone in lumbar intertransverse process fusion

作　　者：罗军[1] 肖荣驰[1] 

机构地区：[1]广西壮族自治区桂林,桂林医学院附属医院骨科,541001

出　　处：《中国基层医药》2011年第1期1-3,共3页Chinese Journal of Primary Medicine and Pharmacy

基　　金：广西壮族自治区科学基金资助项目（桂科字0640189）

摘　　要：目的 评价重组人骨形态发生蛋白2（rhBMP-2）/20%β-磷酸三钙（β-TCP）/消旋聚乳酸（PDLLA）复合物的生物学性能.方法 采用浇铸盐析技术制备三维多孔20%rhBMP-2/β-TCP/PDLLA.选择4个月龄健康雄性新西兰兔24只,随机分为A、B两组各2只,根据Boden介绍的方法制作L4-5横突间植骨融合模型,A组植入rhBMP-2/20%β-TCP/PDLLA复合物,组植入自体髂骨块.动物按术后处死时间（3周、6周、12周）行大体观察,X线检查观察新骨形成、人工骨降解情况.结果 复合人工骨与自体髂骨移植均能达到良好的脊柱融合,A、B两组横突融合率分别为87%、75%,人工骨移植区无炎性反应,而且在新骨形成、改塑的同时载体材料逐渐降解.结论 20%β-TCP/PDLLA显示良好组织相容性,其结构、降解产生微环境均有利于rhBMP-2发挥作用,具有较强诱骨活性及良好的骨性融合能力,是很有希望的骨移植替代材料,其融合力强于自体髂骨移植.Objective To evaluate rhBMP-2/20%β-TCP/PDLLA complex biological properties.Methods Preparation of casting salting was carried out using three-dimensional porous 20% rhBMP-2/β-TCP/PDLLA. 24 4-month-old healthy male New Zealand rabbits were randomly divided into A,B groups of 12,according to the method described in Boden production L4,5 intertransverse process fusion model. A group was embedding rhBMP-2/20%β-TCP/PDLLA complex,and B group was implanted autogenous iliac bone block. Animals were killed according to postoperative time（3 weeks,6 weeks, 12 weeks） ,for gross observation, X-ray observation of the formation of new bone, artificial bone degradation, and early histological manifestations. Results Composite artificial bone and autologous iliac bone graft were able to achieve good spinal fusion,artificial bone graft where there is no inflammatory response,but also in new bone formation,while reshaping the gradual degradation of carrier material. Conclusions 20%β-TCP/PDLLA showed good biocompatibility. Its structure and micro-environment created by its degradation were conducive to play a role for the rhBMP-2. β-TCP/PDLLA had strong activity in inducing bone and good bone fusion ability,and it was a promising bone graft substitutes, which fusion power was stronger than that in autologous iliac bone graft.

关 键 词：骨形态发生蛋白质类 骨代用品 脊柱融合术 生物力学 

分 类 号：R687[医药卫生—骨科学] R3[医药卫生—外科学]