Material for buffered resorbable internal fixation devices...

A - Human Necessities – 61 – L

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A61L 31/00 (2006.01) A61K 9/20 (2006.01) A61L 17/00 (2006.01) A61L 27/14 (2006.01) A61L 27/18 (2006.01) A61L 27/58 (2006.01) A61F 2/02 (2006.01)

Patent

CA 2251472

A bioerodible implantable material, comprising a bioerodible polymer that produces acidic products upon hydrolytic degradation, and a buffering compound that buffers the acidic products and maintains the local pH within a desired range. The buffer compound acts to reduce the inflammatory foreign body response generated by the acidic products and reduces the sterile abscess condition that occurs at the site of the bioerodible implant materials of the prior art. Materials made according to the invention may be used for internal fixation devices (IFDs) for bone repair.

Ce matériau implantable, pouvant subir une érosion biologique, comprend un polymère pouvant subir cette érosion et produisant des constituants acides lors d'une dégradation hydrolytique, ainsi qu'un composé de tamponnage servant à tamponner les constituants acides et à maintenir le pH local dans une plage désirée. Le composé de tamponnage agit pour réduire la réponse inflammatoire du corps étranger, produite par les constituants acides, et il diminue l'état d'abcès stérile survenant sur le site des matériaux implantés et pouvant subir une érosion biologique, des techniques antérieures. On peut utiliser les matériaux réalisés selon l'invention pour des dispositifs de fixation interne, dans une réparation osseuse.

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