Replacement of nucleus pulposus using a hydrogel

A - Human Necessities – 61 – L

Patent

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Details

A61L 27/52 (2006.01) A61F 2/44 (2006.01)

Patent

CA 2567707

A nucleus pulposus of an intervertebral disc is supplemented or replaced by an elongated, physiologically fully hydrated hydrogel prosthesis inserted into the central region of an intervertebral disc, where it can fold upon itself to form a prosthesis body within the central region of the annulus fibrosus. The hydrogel prosthesis may have expanded portions that assist in preventing expulsion of the prosthesis through the insertion aperture. An instrument for inserting the prosthesis has a cutter for severing the elongated prosthesis within the central region of the intervertebral disc after a sufficient amount has been implanted.

Cette invention permet de compléter ou de remplacer le noyau pulpeux d'un disque intervertébral au moyen d'une prothèse d'hydrogel allongée complètement hydratée physiologiquement, qui est insérée dans la région centrale du disque intervertébral, où elle peut se replier sur elle-même pour forme un corps de prothèse dans la région centrale de l'anneau fibreux. Cette prothèse d'hydrogel peut comporter des parties expansées qui contribuent à prévenir l'expulsion de la prothèse par l'ouverture d'insertion. Un instrument pour insérer cette prothèse présente une lame qui sectionne la prothèse allongée dans la région centrale du disque intervertébral, après implantation d'une longueur suffisante.

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