A modular implant that is effective to replace a damaged or degenerated spinal disc is provided. The implant includes a central core member having superior and inferior surfaces, a superior endplate member having a bone-contacting surface and a mating surface effective to mate with the superior surface...http://www.google.de/patents/US20030187506?utm_source=gb-gplus-sharePatent US20030187506 - Modular disc prosthesis
