Abstract
目的 探讨组织工程骨的体内血管化情况和修复大节段骨缺损的能力.方法采用骨髓穿刺、密度梯度离心的方法获取兔骨髓基质细胞,经体外诱导分化,接种到聚磷酸钙纤维/L-聚乳酸/胶原(CPPf/PLLA/Collagen)支架材料上,植入自体尺骨中下段1.5Cm长的骨膜骨缺损区,对照组为缺损区单纯植入CPPf/PLLA/Co1lagen,术后观察12周.结果术后4周缺损区为新生骨样组织充填,血循环丰富,12周时形态结构已接近正常骨组织;随修复时间延长,修复组织的力学性能逐渐增强.结论骨髓基质细胞与CPPf/PLLAA/Collagen复合物具有较强的成骨能力,有望成为修复骨缺损的治疗方法。
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