| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a porous implant material having strength characteristics similar to human bone and ensuring adequate bonding with bone even while avoiding the occurrence of a stress shielding phenomenon. <P>SOLUTION: Multiple porous metal bodies 4 and 5 with different porosities that have three-dimensional reticulated structures with multiple communicating pores 3 formed by a continuous bone structure 2 are bonded via bonding interfaces F parallel in one direction. In the porous metal bodies 4 and 5, at least the pores 3B formed in the porous metal body 5 of the higher porosity are formed in a flat shape that is long in a direction parallel to the bonding interfaces and short in the direction orthogonal to the bonding interfaces and formed so that the length Y of the pores 3B in a direction parallel to the bonding interfaces is 1.2 to 5 times the length X in the direction orthogonal to the bonding interfaces. The porosity of the overall composite of the porous metal bodies is 50% to 92%. The strength when compressed in a direction parallel to a direction along the bonding interfaces is 1.4 to 5 times the strength when compressed in a direction parallel to the direction orthogonal to the bonding interfaces. <P>COPYRIGHT: (C)2012,JPO&INPIT |
