| abstract |
The invention relates to intervertebral disk implants which imitate the natural degrees of freedom of movement by allowing translational and/or rotational movements of the disk located between the vertebrae relative to the bottom plate independently of the possible movements of the cover plate relative to said disk located between the vertebrae. Said movements can be performed by mounting the disk located between the vertebrae on the bottom plate by means of fastening means disposed inside the implant in such a way that translational and/or rotational movements are made possible. Furthermore, the contact surface between the cover plate and the disk located between the vertebrae is semi-cylindrical such that the contact surface is maximized. |