Structural Mechanical And Biological Properties Of Porous Tantalum

Mar 23, 2020

The preparation technology of porous tantalum is relatively complex, the main methods include: vapor deposition method, organic foam impregnation method and laser rapid forming, powder sintering, etc. , the method of preparation of porous tantalum of pore diameter size of 300-600 - um, compared with other metal material with porous structure with high porosity (66.7% 80%), the characteristics of the groups can accelerate the internal.cause pore, improve the porous tantalum internal nutrient exchange, making it have the potential to grow the higher organizations introversion. In addition, Porous tantalum is characterized by low elastic modulus, high surface friction coefficient and excellent mechanical properties. Its elastic modulus is 1.22GPa, which is between cancellous bone (0.1-0.5GPa) and dense bone (12-18GPa).

Implanting human bone tissue in the medical process can avoid the "stress masking" effect, which is conducive to the normal conduction of biological stress. The higher surface friction coefficient can increase the adhesion surface of bone cells, which is conducive to the close fitting and growth of cells, and has the role of guiding the differentiation and maturation of osteoblasts and exerting their osteogenic function.