Patent ID: 8052754

Claim:
An intervertebral endoprosthesis for insertion into the intervertebral space between two adjacent vertebrae, said intervertebral endoprosthesis comprising: first and second base members, each having a first surface configured to engage one of the vertebrae and a second opposite surface; a resilient insert disposed between said base members, said insert comprising an outer shell defining an interior chamber, said outer shell disposed in contacting engagement with said second surface of each of said first and second base members, said resilient insert further including a core disposed within said chamber, said core being integral with said outer shell; first and second coupling members, each of said coupling members extending between said core and one of said base members, said first and second coupling members independently coupling said first and second base members, respectively, to said resilient insert, wherein said first and second base members are movable independently of one another and the adjacent vertebrae are movable independently of one another when the intervertebral endoprosthesis is inserted into the disc space; wherein said resilient insert is a monolithic insert; and wherein said resilient insert and each of said base members are slidable relative to each other in any direction along a spherical surface.