Abstract
Titanium has widely been used as a biomaterial because of its excellent biocompatibility. However, problems with respect to biological reaction and fitness of elastic modulus for human bone have yet to be solved. Porous titanium is expected to be a promising material to solve these problems. The aim of this study is to clarify the effect of the porous titanium with and without annealing on the biomechanical compatibility. Porous titanium was made by spark plasma sintering. And the parts of the samples were annealed. The samples were machined from the sintered compacts for the evaluation of the mechanical properties. The tensile strength of porous titanium was 42 MPa, which is lower than half the value for human cortical bone, while the annealed samples was 95 MPa, a value somewhat close to that of the human cortical bone. We found that the mechanical properties with annealing porous titanium indicated a value close to the human bone.
