An embodiment of an intervertebral prosthetic device for implantation in a
spine includes a rigid fixation member and a compressible member. The
fixation member is configured to be placed in a cavity of a first
vertebral body and against bone of the first vertebral body. The
compressible member is configured to be placed in a cavity in an
intervertebral disc and to be secured to the first fixation member.
Another embodiment includes two compressible members and one fixation
member. In this embodiment, the first and second compressible members are
sized to substantially replace the nucleus pulposus of first and a second
intervertebral discs, respectively, on either side of a vertebral body.
The fixation member is sized to fit within a cavity in the vertebral body
between the first and second compressible members.