Patent ID: 6348071
Filing Date: 2002-02-19
Classification: A61F

Abstract:
A spinal disc prosthesis formed to replace a damaged spinal disc positioned to lie between upper and lower vertebras in a spinal column, the prosthesis comprising:a body including a first opposite surface and a second opposite surface adapted to engage the respective upper and lower vertebras and a single projection extending from the first opposite surface, the projection being generally crescent-shaped, wherein the projection includes (i) a posteriorly facing concave side surface and an anteriorly facing convex side surface both extending upwardly from the first opposite surface, and (ii) a top surface extending between the posteriorly facing concave side surface and the anteriorly facing convex side surface, wherein (i) a posterior edge is defined by the intersection of the top surface and the posteriorly facing concave side surface, and (ii) an anterior edge is defined by the intersection of the top surface and the anteriorly facing concave side surface, and wherein the posterior edge is spaced apart from the anterior edge.