Medical implants and methods for delivering biologically...

A - Human Necessities – 61 – L

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A61L 27/34 (2006.01) A61L 27/54 (2006.01) A61L 27/56 (2006.01) A61L 27/58 (2006.01)

Patent

CA 2704032

Medical implants, such as orthopedic implants of the type used in partial or total joint replacement procedures, for example. The implants include a porous substrate, and a bearing portion of a polymeric material, for example, which is at least partially molded within the porous substrate. The bearing portion includes a bearing surface that is exposed to an articulating component of another medical implant, and the porous metal substrate contacts the bone for osseointegration of the bone tissue into the porous substrate to anchor the implant. The porous substrate may include biodegradable carrier materials, in the form of one or more layers, that carry biologically active agents such as antibiotics and bone growth factors, for example. The layers of biodegradable carrier materials may be tailored such that, after implantation of the implants, the biologically active agents are released sequentially and/or over time into the surrounding tissue to reduce the chances of infection and/or to promote osseointegration of the implant, for example.

La présente invention concerne des implants médicaux, tels que des implants orthopédiques du type utilisé dans des procédures de remplacement d'articulation partiel ou total, par exemple. Les implants comprennent un substrat poreux, et une partie de support en un matériau polymère, par exemple, qui est au moins partiellement moulée à l'intérieur du substrat poreux. La partie de support comprend une surface de support qui est exposée à un composant d'articulation d'un autre implant médical, et le substrat en métal poreux contacte l'os pour l'ostéointégration du tissu osseux dans le substrat poreux pour ancrer l'implant. Le substrat poreux peut comprendre des matériaux de support biodégradables, sous la forme d'une ou de plusieurs couches, qui supportent des agents biologiquement actifs tels que des antibiotiques et des facteurs de croissance osseuse, par exemple. Les couches de matériaux de support biodégradables peuvent être personnalisées de manière à ce que, après l'implantation des implants, les agents biologiquement actifs soient libérés séquentiellement et/ou dans le temps dans le tissu environnant pour réduire les risques d'infection et/ou promouvoir l'ostéointégration de l'implant, par exemple.

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