In situ bioprosthetic filler and methods, particularly for...

A - Human Necessities – 61 – F

Patent

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Details

A61F 2/44 (2006.01) A61L 27/18 (2006.01) A61L 27/22 (2006.01) A61L 27/36 (2006.01) A61L 27/40 (2006.01)

Patent

CA 2422884

Bioprosthetic devices (10) include an exterior biological tissue member (10-1) which at least partly defines a cavity, and a proteinaceous biopolymer (10-2) which fills the cavity, and intercalates and is chemically bound (fixed) to the tissue of the surrounding biological tissue member. In preferred forms, the bioprosthetic device (10) is a bioprosthetic vertebral disc, having a fibrillar outer annulus which surrounds and defines an interior cavity and is formed by removal of at least a substantial portion of the natural gelatinous core therefrom. The cavity defined by the fibrillar outer annulus may then be filled with a flowable proteinaceous biopolymer (10-2). Preferably, the proteinaceous biopolymer (10-2) is a liquid mixture comprised of human or animal-derived protein material and a di- or polyaldehyde, which are allowed to react in situ to form a cross-linked biopolymer within the cavity. The liquid mixture may be formed in advance of being introduced into the cavity, or may be formed simultaneously during introduction into the cavity.

L'invention concerne des dispositifs de bioprothèses comprenant un élément tissulaire biologique extérieur définissant au moins partiellement une cavité, et un biopolymère protéique remplissant la cavité, s'intercalant entre des tissus de l'élément tissulaire biologique concentrique auxquels il est chimiquement lié (fixé). Dans des modes préférés de réalisation, le dispositif de bioprothèse est une bioprothèse de disque intervertébral munie d'un anneau extérieur fibrillaire entourant et définissant une cavité intérieure et étant formé par le retrait d'au moins une partie substantielle du noyau gélatineux naturel. La cavité définie par l'anneau extérieur fibrillaire peut ensuite être remplie d'un biopolymère protéique coulant. Ce dernier est de préférence un mélange liquide composé d'une protéine humaine ou d'origine animale et d'un dialdéhyde ou polyaldéhyde, lesquels peuvent réagir in-situ pour former un biopolymère réticulé à l'intérieur de la cavité. Le mélange liquide peut être formé avant d'être introduit dans la cavité, ou pendant son introduction dans cette dernière.

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