Repair of goat tibial defects with bone marrow stromal cells and β-tricalcium phosphate

  • Guangpeng Liu
  • Li Zhao
  • Wenjie Zhang
  • Lei Cui
  • Wei Liu
  • Yilin Cao


Tissue engineering techniques have been proven effective in bone regeneration and repairing load-bearing bone defects. Previous studies, however, have heretofore been limited to the use of slowdegradable or natural biomaterials as scaffolds. There are, however, no reports on using biodegradable, synthetic beta-tricalcium phosphate (β-TCP) as scaffolds to repair weight-bearing bone defects in large animals. In the present study, highly porous β-TCP scaffolds prepared by the polymeric sponge method were used to repair goat tibial defects. Fifteen goats were randomly assigned to one of three groups, and a 26 mm-long defect at the middle part of the right tibia in each goat was created. In Group A (six goats), a porous β-TCP ceramic cylinder that had been loaded with osteogenically induced autologous bone marrow stromal cells (BMSCs) was implanted in the defect of each animal. In Group B (six goats), the same β-TCP ceramic cylinder without any cells loaded was placed in the defect. In Group C (three goats), the defect was left untreated. In Group A, bony union can be observed by gross view, X-ray and micro-computed tomography (Micro-CT) detection, and histological observation at 32 weeks post-implantation. The implanted β-TCP scaffolds were almost completely replaced by tissue-engineered bone. Bone mineral density in the repaired area of Group A was significantly higher (p < 0.05) than that of Group B, in which scant new bone was formed in each defect and the β-TCP hadn’t been completely resorbed at 32 weeks. Moreover, the tissue-engineered bone of Group A had similar biomechanical properties as that of the normal left tibia in terms of bending strength and Young’s modulus (p > 0.05). In Group C, little or no new bone was formed, and non-union occurred, showing that the 26 mm segmental defect of the goat tibia was critical sized at 32 weeks. Thus, it can be concluded that the mechanical properties of the BMSCs/β-TCP composites could be much improved via tissue engineering approach and β-TCP might be used to repair the weight-bearing segmental defects of goat tibias.


Bone Defect Bone Tissue Engineering Host Bone Tissue Engineering Approach Osteogenic Induction Medium 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.



This work was supported by Major State Basic Research Development Program of China (2005CB522700) and National High Technology Research and Development Program of China (2006AA02A123).

Supplementary material

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Copyright information

© Springer Science+Business Media, LLC 2007

Authors and Affiliations

  • Guangpeng Liu
    • 1
  • Li Zhao
    • 1
  • Wenjie Zhang
    • 1
  • Lei Cui
    • 1
  • Wei Liu
    • 1
  • Yilin Cao
    • 1
  1. 1.Shanghai Tissue Engineering Research and Development CenterShanghaiChina

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