Intervertebral disc prosthesis

摘要

The present invention relates to an intervertebral disc prosthesis comprising at least three pieces including an upper plate, a lower plate, and a movable core at least in relation to a plate, wherein it also comprises two anatomic adaptation elements of which each has, on one hand, a surface in contact with a surface of a vertebra and, on the other hand, a face of which at least a part has a surface in contact with at least a part of the plate opposite to which the anatomic adaptation element is mounted, the anatomic adaptation elements being fixed onto the plates via fixation means.

主权项

1. An intervertebral disc prosthesis comprising at least three pieces including an upper plate, a lower plate, and a core, at least one of the plates and the core being configured for movement of the core at least in translation at least in relation to said at least one of the plates according to an axis substantially parallel to that plate when the prosthesis is assembled, characterized in that the intervertebral disc prosthesis comprises two anatomic adaptation elements of which each has, on one hand, a surface configured for contact with a surface of a vertebra and, on the other hand, a face of which at least a part has a surface in contact with at least a part of the plate opposite to which the anatomic adaptation element is mounted, the anatomic adaptation elements being fixed onto the plates via fixation means; wherein
male and female cooperation means situated in the vicinity of the edges of at least one plate and the core limit the movements in translation of the core relative to this plate, according to an axis substantially parallel to this plate, and limit the movements in rotation of the core relative to this plate, about an axis substantially perpendicular to this plate; the cooperation means of the plate are female cooperation means co-operating with male cooperation means of the core; the fixation means of the anatomic adaptation elements on the plates comprise male fixation means present on the anatomic adaptation elements and complementary and co-operating with female fixation means present on the plates of the prosthesis; and the female fixation means present on the plates of the prosthesis comprise recesses made in the edges of the female cooperation means of the plates of the prosthesis.