A - Human Necessities – 61 – F
Patent
A - Human Necessities
61
F
A61F 2/44 (2006.01) A61F 2/30 (2006.01) A61B 17/02 (2006.01) A61F 2/00 (2006.01) A61F 2/02 (2006.01) A61F 2/28 (2006.01) A61F 2/46 (2006.01)
Patent
CA 2271800
An intervertebral prosthetic device (10, 76) for replacement of an intervertrebral disc includes a first fixation member (14, 78) for fixation within a first vertebral body (20) and a second fixation member (16, 80) for fixation within a second vertebral body (22) adjacent the first vertebral body (20). The present prosthetic device (10, 76) also includes a compressible member (18, 82) for positioning between the first (14, 78) and second (16, 80) fixation members. The compressible member (18, 82) has an outer periphery less than or substantially equal to a diameter of a nucleus pulposus of the intervertebral disc. The compressible member (18, 82) thus essentially fits within the annulus fibrosis of the intervertebral disc. The compressible member (18, 82) also has at least one spring (40, 54, 58, 62) that can be pre-loaded to place the annulus fibrosis under tension and to reproduce the mechanical properties of a natural disc.
La présente invention concerne une prothèse intervertébrale (10, 76) de disque intervertébral qui se compose d'un premier élément de fixation (14, 78) venant se fixer dans un premier corps vertébral (20) et d'un second élément de fixation (16, 80) venant se fixer dans un second corps vertébral (22) jouxtant le premier corps vertébral (20). Cette prothèse (10, 76) comporte également un élément compressible (18, 82) venant se placer entre le premier élément de fixation (14, 78) et le second élément de fixation (16, 80). Le périmètre extérieur de l'élément compressible (18, 82) est inférieur ou sensiblement égal au diamètre du noyau gélatineux. Il en résulte que l'élément compressible (18, 82) s'adapte sensiblement dans l'anneau fibreux du disque intervertébral. Cet élément compressible (18, 82) comporte également au moins un ressort (40, 54, 58, 62) qu'il est possible de comprimer préalablement de façon à agir sur l'anneau fibreux et reproduire les propriétés mécaniques d'un disque naturel.
Buttermann Glenn R.
Torys Llp
LandOfFree
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