| 摘要 |
PURPOSE:To prevent the degree of advance of bone tissue into fine holes from varying according to sections by forming an artificial prosthetic member consisting of a material without having a property to injure the human body of a porous member laminated with sheets having thicknesses of specific values and specifying the average grain size of the fine holes in contact with the surface layer which comes into contact with the hard tissues to a specific value. CONSTITUTION:The porous member S which constitutes the artificial prosthetic member or covers the surface of the artificial prosthetic member is formed of a laminated structure obtd. by successively stacking the sheets 1, 2,... which are <=15mum thick and are bored with the many fine holes H. The average pore size of the fine holes H of the sheets 1, for example, the sheets constituting the surface of the porous member S in contact with the bones is in a range of 500 to 1000mum. The thickness of the metallic sheets 1, 2,... constituting the porous member S is <=150mum and, therefore, the porous member is easily formable. Such porous member is thermally bonded by heating under substantially no-load, by which the fine holes H are three-dimensionally connected and the porous member S properly controlled in the connections is molded and fixed to comply with the intricate surfaces of the artificial prosthetic member. |
