Patent ID: 7517363

Claim:
An intervertebral motion disc comprising a) a prosthetic vertebral endplate comprising: i) an outer surface adapted to mate with a vertebral body, ii) an inner surface having a first opening thereon, iii) a body portion connecting the inner and outer surfaces and defining a first sidewall comprising a second opening thereon, and iv) an articulation surface suitable for supporting articulation motion, wherein the first and second openings communicate to form a channel having a first open end, and b) a tab shaped for insertion into the channel, wherein the tab is disposed within the channel and comprises a body portion and deformable arms extending from the body portion, wherein each deformable arm comprises a wing extending therefrom, wherein the body portion of the endplate further comprises second and third sidewalls defining a first width and the wings define a wingspan, and wherein the wingspan exceeds the first width of the channel, and wherein each of the second and third sidewall of the endplate further comprises a socket extending therein, thereby defining opposing sockets, and wherein the wings are shaped to be received within the opposing sockets.