Abstract: An intervertebral disk prostheses for the total replacement of an intervertebral disk of the lumbar and cervical spine has an upper plate having upwardly projecting formations anchoring it to an upper vertebra on its upper face and a concavity on its inner face surrounded by an edge. A lower plate is provided with downwardly projecting formations anchoring it to a lower vertebra on its lower face and a flat inner face surrounding a groove extending front-to-back. A middle plate between the upper and lower plate has on its upper face a convexity that is identically or differently shaped to the concavity on the inner face of the upper plate and a ridge extending front-to-back surrounded by a flat lower face of the middle plate. The ridge has flanks and the groove houses the ridge of the middle plate and permits the ridge to slide front-to-back in the groove.

Abstract: An implant (1) for insertion between vertebral bodies of the spinal column as a spacer for intervertebral disks removed from the spinal column, vertebrae, or vertebrae portions, comprises a first implant part (2) and a second implant part (3), which can be displaced relative to each other in the direction of the coaxial longitudinal axes thereof for changing the length of the implant (1), and further comprises an attachment plate (5a, 5b), which can be connected at the free end of at least one of the two implant parts (2, 3) in an orientation that is substantially perpendicular to the longitudinal axis using means for detachable fastening. The attachment plate (5a, 5b) has a basic circular shape (8), wherein the basic circular shape (8) is modified at the circumference by superpositions of substantially circular plate extensions (9, 10) having different diameters and/or different degrees of overlap with the basic circular shape (8).