Resorbable implant biomaterial made of condensed calcium...

A - Human Necessities – 61 – L

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A61L 27/00 (2006.01) A61L 27/12 (2006.01) A61L 27/42 (2006.01) A61L 27/46 (2006.01) A61F 2/00 (2006.01) A61F 2/02 (2006.01) A61F 2/08 (2006.01)

Patent

CA 2252860

A resorbable biomaterial for implantation in humans and other animals comprises amorphous or crystalline condensed calcium phosphate of the general formula: [Ca(PO3)2]n, where n is 3 or greater and the molar ratio of Ca:P is between about 0.4 and 0.6. The condensed calcium phosphate powder can be formed as a sintered powder which is bound or consolidated to form at least part of an implantable anchor, with controlled size and amount of porosity. The condensed calcium phosphate part of anchor/implant preferably has a bone interfacing portion which is placed in juxtaposition with adjacent hard tissues when implanted in a patient, and which is characterized by interconnected pores extending from the exterior throughout the interior of the biomaterial. The condensed calcium phosphate may be used to replace hard connective tissues, or to regenerate soft connective tissues by providing a support on which soft tissue may be grown in vitro or in vivo, or to anchor soft connective tissue to bone.

Biomatériau résorbable pour implantation humaine et animale, composé de phosphate de calcium condensé amorphe ou cristallin défini par la formule générale (Ca(PO¿3?)¿2?)¿n?, dans laquelle n est égal ou plus grand que trois et le rapport molaire Ca:P est compris entre 0,4 et 0,6. La poudre de phosphate de calcium condensé peut être présentée sous forme de poudre frittée qui est liée ou consolidée de manière à former au moins une partie d'un ancrage d'implantation de taille et de porosité surveillées. La partie en phosphate de calcium condensé de l'ancrage/implant présente de préférence une portion de contact osseux qui sera juxtaposée aux tissus durs adjacents au moment de son implantation sur un patient, et qui est caractérisée par des pores interconnectées partant de l'extérieur et traversant tout le biomatériau. Le phosphate de calcium condensé peut être utilisé pour remplacer des tissus conjonctifs durs ou pour régénérer les tissus conjonctifs souples en offrant un support sur lequel le tissu souple peut être cultivé in vitro ou in vivo, ou pour ancrer le tissu conjonctif souple à l'os.

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