焼結スペーサー法による力学的生体適合性を有するチタン繊維強化ポーラスチタンの作製

抄録

Titanium (Ti) and its alloys have been used for artificial bones because of their high mechanical performance and corrosion resistance. It has been reported that natural bones surrounding a Ti-based artificial bone are damaged due to the stress shielding effect, which is caused by the higher stiffness (Young’s modulus) of artificial bone than that of natural bone. To develop implant materials with lower Young’s modulus and higher strength which are desirable mechanical properties for artificial bones, Ti fiber-reinforced porous Ti was fabricated in this study. As a result, the Ti fiber-reinforced porous Ti with the porosity of 60% and the fiber volume fraction of 3% to 20% was successfully fabricated via the space holder technique with spark plasma sintering. Tensile testing showed that the porous Ti exhibited Young’s modulus and strength comparable to the natural bones.