Patent ID: 7682396

Claim:
Intervertebral disc prosthesis comprising an upper plate, a lower plate, and a core, a curved upper surface of the core being in contact with at least part of a curved lower surface of the upper plate and a lower surface of the core being in contact with at least part of an upper surface of the lower plate with an angle between respective planes of the upper and lower plates being obtained by the core having an acute angle in a front-rear direction, and the upper plate being moveable at least with respect to the core and the core being movable in translation and rotation with respect to the lower plate, and in which there are cooperation means not located in the middle of the core between the lower plate and the core, so as to limit translation movements of the core with respect to the lower plate around an axis substantially parallel to the lower plate when the intervertebral disc prosthesis is assembled, and to limit or eliminate rotation movements of the core with respect to the lower plate around an axis substantially perpendicular to the lower plate when the intervertebral disc prosthesis is assembled, in which the lower plate comprises male means cooperating with female means of the core and the male means of the lower plate are two pins curved towards the inside of the prosthesis and located opposite each other on two edges of the prosthesis, and in that the female means of the core are two recesses.