Intervertebral Disc Prosthesis
AssigneeGrampian Health Board
InventorDouglas Wardlaw
Life of this patent
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Abstract
A flexible prosthetic cover shaped to form a replacement nucleus pulposis for an intervetebral disc with an aperture for the introduction of filling material therein, and an elongate introducer member configured to pass into the aperture is provided. The cover has a strengthened portion substantially opposite the aperture for engaging the distal end of the member, the strengthened portion and the distal end being arranged to interlock, for facilitating orientation of the cover, for example so as to prevent relative rotation there between.
Claims19
A prosthetic cover for an intervertebral disc comprising an edge portion being a resiliently deformable annular sleeve shaped to fit within a disc annulus and a pair of opposed flexible central portions each joining the edge portion at an edge of the sleeve, wherein the central portions are formed from a flexible thin material and the edge portion comprises a circumferential ring which is thicker than the central portions, wherein the edge portion includes an aperture for the introduction of a filling material, and wherein the annular sleeve is pressurised against the disc annulus on injection of a filling material into the cover.
A prosthetic cover for an intervertebral disc comprising an edge portion being a resiliently deformable annular sleeve shaped to fit within a disc annulus and a pair of opposed flexible central portions each joining an edge of the sleeve, the edge portion including an aperture for the introduction of a filling material, wherein the annular sleeve is pressurised against the disc annulus on injection of a filling material into the cover.
A prosthetic cover for an intervertebral disc comprising an edge portion being a resiliently deformable annular sleeve being shaped to fit within a disc annulus, and a pair of opposed flexible central portions each joining an edge of the sleeve, the edge portion including an aperture for the introduction of a filling material, wherein, in use, the edges of the annular sleeve overlap superior and inferior vertebral end plates.
Dependencies are inferred from the claim text.