A porous organic-inorganic composite implant material and...

A - Human Necessities – 61 – L

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A61L 27/40 (2006.01) A61L 27/44 (2006.01) A61L 27/46 (2006.01) A61L 27/56 (2006.01) A61L 27/58 (2006.01) B29C 43/00 (2006.01) B29C 43/18 (2006.01)

Patent

CA 2467260

It is intended to provide an implant material made of an organic-inorganic composite porous substance which is biologically active and bioabsorbable. Namely, an implant material made of an organic-inorganic composite porous substance which is a biologically active and bioabsorbable porous substance having fine biologically active bioceramic grains uniformly dispersed in a biodegradable and absorbable polymer and has an open pore structure wherein the fine bioceramic grains are partly exposed within the pores and on the surface of the porous substance; and a process for producing the implant material made of an organic-inorganic composite porous substance characterized by comprising dissolving a biodegradable and absorbable polymer in a volatile solvent, dispersing fine biologically active bioceramic grains therein, forming a non-woven fabric like fibrous aggregate from the liquid mixture thus prepared, molding it by heating under elevated pressure to give a porous fibrous aggregate, immersing the synthetic fibrous aggregate in a volatile solvent and then eliminating the solvent.

L'invention concerne un matériau d'implant composé d'une substance poreuse composite organique-inorganique, laquelle est biologiquement active et bioabsorbable. Cette substance comporte de petits grains en biocéramique, biologiquement actifs et répartis uniformément dans un polymère biodégradable et absorbable, et elle présente une structure de pores ouvertes, les petits grains en biocéramique étant partiellement mis à nus dans les pores et sur la surface de ladite substance poreuse. La présente invention porte également sur un procédé pour réaliser ce matériau d'implant fait d'une substance poreuse composite organique-inorganique, ce procédé étant caractérisé par les opérations suivantes : dissoudre un polymère biodégradable et absorbable dans un solvant volatile, y disperser des petits grains en biocéramique biologiquement actifs, façonner un non-tissé tel qu'un agrégat fibreux à partir du mélange liquide ainsi obtenu, le mouler en le chauffant sous haute pression pour réaliser un agrégat fibreux poreux, immerger cet agrégat fibreux synthétique dans un solvant volatile et éliminer le solvant.

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