Intervertebral disc implant

Details Intervertebral disc implant Intervertebral disc implant

A - Human Necessities

61

F

A61F 2/44 (2006.01) A61F 2/00 (2006.01) A61F 2/08 (2006.01) A61F 2/28 (2006.01) A61F 2/30 (2006.01) A61F 2/40 (2006.01) A61F 2/46 (2006.01)

Patent

CA 2495404

The invention relates to an artificial intervertebral disc for placement between adjacent vertebrae. The artificial intervertebral disc is preferably designed to restore disc height and lordosis, allow for a natural range of motion, absorb shock and provide resistance to motion and axial compression. Furthermore, the intervertebral disc (10) may be used in the cervical, the thoracic, or the lumbar regions of the spine. The artificial intervertebral disc may include either singularly or in combination: an interior (19) at least partially filled with a fluid (22); a valve (20) for injecting fluid into the interior of the disk; a central region having a stiffness that is preferably greater than the stiffness of the cuter regions thus enabling the disc to pivot about the central region. The central pivot may be formed by a center opening (108), a central chamber (162), an inner core or a central cable (258).

L'invention concerne un disque intervertébral artificiel destiné à être implanté entre des vertèbres adjacentes, visant de préférence à rétablir la hauteur de disque et la lordose, qui offre les fonctions suivantes: amplitude de mouvement naturelle, absorption des chocs, et résistance au mouvement et à la compression axiale. De plus, on peut utiliser ce disque dans les zones cervicale, thoracique ou lombaire. Le disque peut comprendre, isolément, ou en combinaison: un intérieur au moins partiellement rempli de fluide; une valve d'injection de fluide dans l'intérieur du disque; une partie centrale à rigidité de préférence supérieure à celle des parties externes, permettant le pivotement du disque autour de la partie centrale. Le pivot central peut prendre la forme d'une ouverture centrale, d'une chambre centrale, d'un noyau interne ou d'un câble central.

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