Devices and methods for altering the spacing and motion at the facet
joints of the vertebral column are provided. One embodiment of the
invention comprises a prosthesis with surfaces configured to articulate
with the facets of the facet joint. A retaining member for anchoring the
prosthesis within the facet joint is optionally included. Methods for
surgically and less invasively implanting the prosthesis and securing the
prosthesis to the articular processes or surrounding soft tissue are also
provided.
