| 摘要 |
PROBLEM TO BE SOLVED: To impart strength properties close to a human bone, to secure sufficient bonding properties to the bone even while avoiding the occurrence of a stress shielding phenomenon, and to maintain stable strength even to an unexpected load.SOLUTION: In a porous implant material, a plurality of metallic bodies 4, 5 having different porosity are joined through junction interfaces F. The high-porosity metallic body 4 is a porus metallic body having a three-dimensional mesh-like structure wherein a plurality of pores formed by a continuous framework are communicated, and the porosity is 60-98%. The low-porosity metallic body 5 is a dense metallic body having the porosity of 0-50%, and an area occupation ratio of the dense metallic body in a cross section in a direction orthogonal to an axial direction is 5-50%. The junction interface F is continuously formed with a plurality of bent or curved parts, an interval thereof is 6-30 mm, a deflection width is 0.3-3 mm, and the whole longitudinal elastic modulus when having been compressed in a direction parallel to the axial direction is 5-35 GPa. |
