Macroporous, resorbable and injectible calcium...

A - Human Necessities – 61 – L

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A61L 27/12 (2006.01) A61L 27/54 (2006.01) C04B 28/34 (2006.01)

Patent

CA 2555379

A composition and method for producing interconnective macroporous, resorbable and injectable calcium phosphate-based cements (MICPs). The composition of the invention sets to poorly crystalline apatitic calcium phosphate after mixing a powder component and an aqueous solution. The multiphasic calcium phosphate components in the cement resorb at different rates allowing he timely replacement by new bone. The interconnected macroporosity in the cement allows for vascularization, entrapment of growth factors, cell colonization and tissue ingrowth. This MICPC can be used for dental and medical applications relating to bone repair, augmentation, reconstruction, regeneration, and osteoporosis treatment, and also for drug delivery, and as scaffolds for tissue engineering.

L'invention concerne une composition et un procédé permettant de produire des ciments injectables à base de phosphate de calcium. Après mélange d'un composant en poudre avec une solution aqueuse, cette composition durcit en formant un phosphate de calcium apatitique faiblement cristallin. Les composants de phosphate de calcium à plusieurs phases contenus dans le ciment se résorbent à des vitesses différentes permettant le remplacement en temps opportun par le nouveau tissu osseux. La macroporosité communicante du ciment permet la vascularisation, la retenue des facteurs de croissance, le colonisation cellulaire et la pénétration tissulaire. Ce ciment injectable à base de phosphate de calcium convient pour les applications dentaires et médicales impliquant une réparation, une augmentation, une reconstruction, une régénération, pour le traitement de l'ostéoporose, ainsi que pour l'administration de médicaments, et pour la formation d'échafaudages dans les procédures de génie tissulaire.

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