Patent ID: 8414652
Filing Date: 2013-04-09
Classification: A61F

Abstract:
1. A disc prosthesis comprising: an upper endplate including a first bone contacting surface and a first articulating surface generally opposite to the first bone contacting surface; a lower endplate including a second bone contacting surface and a second articulating surface generally opposite to the second bone contacting surface; and a bearing component including a third convex articulating surface configured to articulate with the first articulating surface, and a fourth concave articulating surface configured to articulate with the second articulation surface, the bearing component configured such that when the disc prosthesis is implanted and viewed in cross-section in a sagittal plane, the third convex articulating surface extends from a forward non-articulating surface to a rearward non-articulating surface located at a posterior portion of the bearing component, and the entire third convex articulating surface and the entire fourth concave articulating surface continuously converge in a posterior to anterior direction, wherein the lower endplate is configured such that when the disc prosthesis is implanted and viewed in cross-section in the sagittal plane, the second articulating surface continuously diverges from the second bone contacting surface in the posterior to anterior direction.