Patent ID: 7156876

Claim:
A motion disc comprising: a) a first prosthetic vertebral endplate comprising: i) an first outer surface having a porous coating thereon and adapted to mate with a first vertebral body, ii) an first inner surface comprising an first peripheral surface and a first articulation surface, iii) a body portion connecting the first inner and outer surfaces, b) a second prosthetic vertebral endplate comprising: i) an second outer surface having a porous coating thereon and adapted to mate with a second vertebral body, and ii) an second inner surface comprising a second peripheral surface and a second articulation surface, iii) a body portion connecting the second inner and outer surfaces, c) an articulating core member adapted to maintain intervertebral spacing and comprising: i) a first articulation surface adapted for articulation with the first articulation surface of the first endplate, and ii) a second articulation surface adapted for articulation with the first articulation surface of the second endplate, wherein the articulating core member is disposed between the prosthetic endplates and oriented to produce a first articulation interface between the first articulation surface of the first endplate and the first articulation surface of the core member, and a second articulation interface between the first articulation surface of the second endplate and the second articulation surface of the core member, and d) a peripheral shock-absorbing component comprising: i) a first surface contacting the first peripheral surface of the first endplate, and ii) a second surface contacting the second peripheral surface of the second endplate, wherein the core component is selected from the group consisting of polyethylene, PEEK, ceramic and metals, and wherein the shock-absorbing component comprises an elastomer, and wherein each peripheral surface of the shock-absorbing component is tenaciously attached to the respective inner surface of each endplate.