Method for attaching a porous metal layer to a metal substrate

摘要

A method for attaching a porous metal layer to a dense metal substrate, wherein the method is particularly useful in forming orthopedic implants such as femoral knee components, femoral hip components, and/or acetabular cups. The method, in one embodiment thereof, comprises providing a solid metal substrate; providing a porous metal structure; contouring a surface of the porous metal structure; placing the porous structure against the substrate such that the contoured surface of the porous metal structure is disposed against the substrate, thereby forming an assembly; applying heat and pressure to the assembly in conjunction with thermal expansion of the substrate in order to metallurgically bond the porous structure and the substrate; and removing mass from the substrate after the porous structure is bonded to the substrate, thereby finish processing the assembly.

主权项

1. A method for attaching a porous metal layer to a metal substrate of an orthopedic implant, the method comprising the steps of:
providing the metal substrate; injecting a polymer that is heated onto the metal substrate in a mold so as to form an injection-molded polymer layer on the metal substrate, the injection-molded polymer layer including an outer surface shaped by the mold; after the applying step, re-heating the injection-molded polymer layer on the metal substrate to form a softened polymer layer on the metal substrate; and press-fitting the porous metal layer onto the softened polymer layer to form an assembly.