Dynamic intervertebral implant

A - Human Necessities – 61 – F

Patent

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Details

A61F 2/44 (2006.01) A61B 17/70 (2006.01) A61B 17/86 (2006.01) A61F 2/00 (2006.01) A61F 2/28 (2006.01) A61F 2/30 (2006.01)

Patent

CA 2478842

The implant (1) comprises two side walls (2) resting against the vertebral end-plates and an intermediate wall (3) joining said supporting walls. The implant (1) can be deformed for insertion between the vertebrae (10) to be treated and in order to restore the attenuated mobility of said vertebrae (10), and comprises means (4) for the mounting thereof on said vertebrae(10). According to the invention, said side walls (2), when seen from the side, have a curved shape, whereby the convexity thereof is oriented towards the outside of the implant (1); said intermediate wall (3) has a curved shape, whereby the convexity thereof is oriented towards the outside of the implant (1) and is such that it does not form any pronounced angles with the supporting side walls (2). The supporting side walls (2) and the intermediate wall (3), when seen from the side, have a partially oval shape like a water droplet; and the means (4) for fixing the implant (1) to the vertebrae (10) are configured in such a way that said implant (1) can be mounted on the vertebrae (10), i.e. the implant (1) can be slightly deformed in relation to the vertebrae (10) during the movement of said vertebrae.

Cet implant (1) comprend deux parois latérales (2) d'appui contre les plateaux vertébraux et une paroi intermédiaire (3) de raccordement de ces parois latérales d'appui, cet implant (1) étant déformable élastiquement pour son insertion entre les vertèbres (10) à traiter et pour permettre de restaurer une mobilité amortie de ces vertèbre (10), et comprenant des moyens (4) pour son assemblage à ces vertèbres (10).Selon l'invention,- lesdites parois latérales (2) présentent vues de profil, des formes courbes avec leur convexité tournée vers l'extérieur de l'implant (1) ;- ladite paroi intermédiaire (3) présente une forme courbe, avec sa convexité tournée vers l'extérieur de l'implant (1), et est telle qu'elle ne forme pas d'angles marqués avec lesdites parois latérales d'appui (2), ces parois latérales d'appui (2) et cette paroi intermédiaire (3) ayant ainsi, vues de profil, une forme partiellement ovale, "en goutte d'eau" ; et- les moyens (4) de fixation de l'implant (1) aux vertèbres (10) sont conçus pour permettre un assemblage non rigide de cet implant (1) à ces vertèbres (10), c'est-à-dire autorisant une légère déformation de l'implant (1) par rapport aux vertèbres (10) lors du mouvement de ces vertèbres.

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