Porous beta-tricalcium phosphate granules and methods for...

C - Chemistry – Metallurgy – 01 – B

Patent

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C01B 25/32 (2006.01) A61L 27/12 (2006.01) A61L 27/46 (2006.01) A61L 27/54 (2006.01) A61L 27/56 (2006.01)

Patent

CA 2439813

A porous .beta.-tricalcium phosphate material for bone implantation is provided. The multiple pores in the porous TCP body are separate discrete voids and are not interconnected. The pore size diameter is in the range of 20- 500 ~m, preferably 50-125 ~m. The porous .beta.-TCP material provides a carrier matrix for bioactive agents and can form a moldable putty composition upon the addition of a binder. Preferably, the bioactive agent is encapsulated in a biodegradable agent. The invention provides a kit and an implant device comprising the porous .beta.-TCP, and a bioactive agent and a binder. The invention also provides an implementable prosthetic device comprising a prosthetic implant having a surface region, a porous .beta.-TCP material disposed on the surface region optionally comprising at least a bioactive agent or a binder. Methods of producing the porous .beta.-TCP material and including bone formation are also provided.

L'invention se rapporte à un matériau de phosphate tricalcium-.beta. poreux. Les nombreux pores dans le corps TCP poreux consistent en des vides séparés et ne sont pas interconnectés. Le diamètre de pore est compris entre 20 et 500 µm, de préférence entre 50 et 125 µm. Le matériau TCP-.beta. poreux fournit une matrice de support pour les agents bioactifs et peut former une composition pâteuse moulable en cas d'addition d'un liant. De préférence, l'agent bioactif est encapsulé dans un agent biodégradable. L'invention porte aussi sur une trousse et un dispositif d'implant comprenant le TCP-.beta. poreux, un agent bioactif et un liant. Cette invention se rapporte également à un dispositif prothétique implantable comportant un implant prothétique présentant une zone de surface et, facultativement, au moins un agent bioactif ou un liant. L'invention concerne aussi des procédés de fabrication de matériaux TCP-.beta. poreux et de contribution à la formation osseuse.

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