Abstract:

BACKGROUND: Xenogeneic bone has the advantages of rich source, inexpensive and relatively simple and easy approach. Bone scaffold after processing can retain the micro-structure of the original bone. It has a good contribute to bone, bone conduction and bone-inducing activity.
OBJECTIVE: To detect the physiochemical performance and cells compatibility in vitro of homemade biological derivative bone scaffold materials.
METHODS: The pig cancellous scaffold materials were prepared through deproteinization, degrease, decalcification and cryopreservation. The cancellous scaffold materials before and after processed were detected by histological observation. Material structure and pore diameter was observed and calculated under scanning electron microscope. Scaffold materials porosity was calculated by using liquid replacement method, and the degradation speed of scaffolds in vitro was tested. Materials mainly elements were detected by the energy spectrum analysis and the compatibility of rabbit bone marrow mesenchymal stem cells in vitro.
RESULTS AND CONCLUSION: Processed scaffolds had the characteristics of three-dimensional structure. The pore size was 150.8-306.7 μm and the porosity was 84.5%-89.7%. Scaffolds degradation was at a slow pace in the first 6 weeks. After the first 6 weeks, the scaffolds degradation rate curve presented linear curve and the degradation speed was increased significantly. The material was almost completely degraded at 10 weeks and the degradation rate arrived to 92.8%. The pore size of cancellous scaffold was appropriate for the proliferation and adhesion of bone mesenchymal stem cells, it indicated that the biological derivative bone scaffold materials had good performance and compatibility and suitable for building tissue engineering bone.