PROSTHETIC INTERVERTEBRAL DISC OR ARTIFICIAL VERTEBRA

摘要

The intervertebral disc prosthesis or the intervertebral implant comprises: a cavity-like middle part (2) with a central longitudinal axis (6), an upper end (4) and with a lower end (5); an upper apposition plate (7), which is placed on the upper end (4) of the middle part (2) while being perpendicular to the longitudinal axis (6) and which is suited for resting against the base plate of a vertebral body, and: a lower apposition plate (8), which is placed on the lower end (5) of the middle part (2) while being perpendicular to the longitudinal axis (6) and which is suited for resting against the cover plate of a vertebral body. The middle part (2) comprises an elastic means (19) consisting of at least two coaxially arranged plate springs (20). This elastic means (19) has a progressive spring characteristic.