Vertebral disc or intervertebral disc prosthesis

A - Human Necessities – 61 – F

Patent

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Details

A61F 2/44 (2006.01)

Patent

CA 2519162

The invention relates to a vertebral disc or intervertebral disc prosthesis comprising: A) an upper apposition plate (1) that is suited for placing against the base plate of a vertebral body; B) a lower apposition plate (2), which is located at a distance from the upper apposition plate and which is suited for placing against the cover plate of a vertebral body; C) a number of elastic means (3) that are placed between both apposition plates (1, 2) in the peripheral areas (4) thereof so that both apposition plates (1, 2) can elastically move relative to one another, and; D) a central axis (5) that is essentially perpendicular to both apposition plates (1, 2). Said elastic means (3) are formed or arranged in such a manner that the vertebral disc has, by and large, an asymmetric rigidity.

L'invention concerne une prothèse de disque intervertébral ou une prothèse intervertébrale, comprenant A) une plaque d'apposition supérieure (1) appropriée pour venir en contact avec le plateau inférieur d'un corps vertébral; B) une plaque d'apposition inférieure (2) appropriée pour venir en contact avec le plateau supérieur d'un corps vertébral et située à distance de la plaque d'apposition supérieure; C) une pluralité de moyens élastiques (3) qui sont placés entre les deux plaques d'apposition (1,2), au niveau de leurs zones périphériques (4), de sorte que les deux plaques d'apposition (1,2) puissent se déplacer de manière élastique l'une par rapport à l'autre; et D) un axe central (5) sensiblement perpendiculaire aux deux plaques d'apposition (1,2). Les moyens élastiques (3) sont conçus ou placés de sorte que la prothèse de disque intervertébral présente globalement une rigidité asymétrique.

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