Biodegradable polymer/ceramic implant material with bimodal...

A - Human Necessities – 61 – L

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Details

A61L 27/14 (2006.01) A61F 2/02 (2006.01) A61F 2/28 (2006.01) A61L 27/10 (2006.01) A61L 27/44 (2006.01) A61L 27/46 (2006.01) A61L 27/50 (2006.01) A61L 27/58 (2006.01) B29C 47/00 (2006.01)

Patent

CA 2389627

A biodegradable therapeutic implant material having a bimodal degradation profile made from a biodegradable polymer having a biodegradable ceramic substantially uniformly distributed therein is provided. Preferably the material is nonporous (fully dense). Methods of using the materials of this invention for healing of defects in bone, cartilage, and other tissues are also provided. Methods of making such therapeutic implant materials are also provided including the steps of preparing the polymer in uncured form, mixing particles of a biodegradable ceramic into said polymer, and applying heat and pressure to the mixture to produce a substantially nonporous, cohesive implant material. Methods of making porous implants by dissolving out the biodegradable ceramic materials in vivo or in vitro are also provided as are the porous implant themselves.

L'invention concerne un matériau d'implant thérapeutique biodégradable présentant un profil de dégradation bimodal et fabriqué en un polymère biodégradable dans lequel est répartie une céramique biodégradable de façon sensiblement uniforme. Ce matériau est de préférence non poreux (totalement dense). Elle concerne également des procédés d'utilisation de ces matériaux afin de guérir des défauts des os, du cartilage et d'autres tissus. Elle concerne également des procédés servant à fabriquer ces matériaux d'implant thérapeutique, ce qui consiste à préparer le polymère sous forme non durcie, à mélanger des particules d'une céramique biodégradable à l'intérieur dudit polymère et à appliquer de la chaleur et de la pression au mélange, de manière à obtenir un matériau d'implant cohésif, pratiquement non poreux. Elle concerne encore des procédés de fabrication d'implants poreux par dissolution des matériaux de céramique biodégradable in vivo ou in vitro, de la même manière que les implants poreux.

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