Prosthetic disc and vertebral body replacement device having pyrolytic carbon bearing members

摘要

A spinal motion device for implanting in the spine as a replacement for the natural disc, to permit motion between adjacent vertebral bodies or as a vertebral body replacement that permits motion at its ends. The spinal motion device comprises a composite structure formed by a body having at least one bearing member, made from a biocompatible material such as pyrolytic carbon, attached to a support surface thereof.