Patent ID: 7959678

Claim:
An intervertebral disk implant, having two implant plates for contacting prepared vertebral body surfaces in the implanted state and an implant core which can be introduced between the implant plates, wherein the implant has an implant radius which corresponds to a radius of curvature (R 0 ) of articulation surfaces of the implant plates and is measured from a center (M 0 ) disposed on a central axis of the implant core, wherein the implant core in a resting state is made rotationally symmetrically with respect to the central axis and each articulation surface of the implant core has a radius of curvature (R 1 , R 2 ) in a cross-section through the central axis, each of said radius of curvature (R 1 , R 2 ) being smaller than the radius of curvature (R 0 ) of the articulation surfaces of the implant plates, wherein R 1 is not equal to R 2 , wherein a center (M 1 , M 2 ) of each articulation surface of the implant core is spaced apart from the central axis.