Patent ID: 7494508
Filing Date: 2009-02-24
Classification: A61F

Abstract:
1. An intervertebral disc prosthesis comprising at least three pieces including a first plate, a second plate, and a core, the core mobile at least in rotation and translation with respect to the second plate, the core having a curved surface in contact with at least a part of a complementary curved surface of the first plate, and a substantially flat surface in contact with at least a part of a substantially flat surface of the second plate, the core has a male or female cooperation means complementary to a female or male cooperation means on the second plate wherein the core and the second plate cooperation means are located near their respective peripheries and are configured to allow limited movements in translation of the core in relation to the second plate to along an axis substantially parallel to the substantially flat surfaces, and allowing to limit the movements in rotation of the core in relation to the second plate, about an axis substantially perpendicular to the substantially flat surfaces, wherein the top of the curved surface of the core is off centre, in at least one direction, in relation to the geometric centre of this curved surface of the core.