| 摘要 |
The present invention relates to an intervertebral disc prosthesis comprising at least three pieces including an upper plate (1), a lower plate (2) and a mobile core (3) at least relative to the lower plate, the upper surface of the core being in contact with at least a part of the lower surface of the upper plate, cooperation means (22, 31) limiting or preventing the movements of the core relative to the lower plate, in translation and in rotation, respectively, along an axis substantially parallel to the lower plate and about an axis substantially perpendicular to the lower plate , characterised in that at least the lower surface of the core has at least one hole (41) facilitating sliding of the core relative to the upper surface of the lower plate with which it is in contact. |
