| 摘要 |
PROBLEM TO BE SOLVED: To exhibit the very small anchoring effect of an implant part-bone bonded part particularly on the osteostructure by constituting the implant member for the living boy in such a manner that the surface of at least its part in contact with the living body has a three-dimensional sponge-like porous structure, thereby accelerating the propagation of the vital tissue cells. SOLUTION: The surface of the implant member is formed to the three- dimensional sponge-like porous structure in order to improve the form of the its surface roughness. Namely, the surface is so constituted that the holes sized 0.1 to 5μm are connected to each other not only in the surface direction but in the depth direction as well and that the respective holes communicate with each other longitudinally and transversely and exhibit a sponge-like form. The neoblastic cells are partly infiltrated and formed in the undercuts, by which the secure bond between the bone and the implant member is attained. The treatment of a Ti alloy with an acid and more particularly hydrochloric acid is optimum for production of such implant material. |
