Patent ID: 8747475

Claim:
A method for repairing or replacing the nucleus of a spinal intervertebral disc, comprising: providing a generally flexible double walled mesh member sized to fit and expand transversely into a hollowed region of an intervertebral space, the double walled mesh member comprising an inner circumferential wall and an outer circumferential wall, the inner circumferential wall defining an open interior space, the inner circumferential wall and outer circumferential wall defining a toroidal space therebetween, the mesh member including an opening through which fill material may be introduced into the toroidal space, the mesh member constructed and arranged to expand from a reduced state to an expanded state by the introduction of fill material into the open interior space; inserting the mesh member into the intervertebral space; inserting the fill material into the open interior space of the mesh member through the inner circumferential wall; and inserting fill material into the toroidal space of the mesh member such that the filled toroidal space provides additional strength and radial support to the intervertebral disc.