Patent ID: 8292965
Filing Date: 2012-10-23
Classification: A61F

Abstract:
1. A prosthetic knee joint comprising: a one-piece tibial component comprising a concave lateral bearing surface and a concave medial bearing surface separated by a central ramp characterized by a ramp height that decreases from anterior to posterior, said medial concave bearing surface being deeper than said lateral concave bearing surface, and further comprising a single raised pad spaced from the central ramp, located entirely within the concavity of the medial bearing surface, and completely surrounded by an anterior portion of said medial bearing surface; a one-piece femoral component, in articulating contact with said tibial component, said femoral component comprising a patella flange, a lateral condylar surface, configured to engage said lateral bearing surface, and a medial condylar surface, configured to engage said medial bearing surface, said medial condylar surface comprising an antero-medially located recess, said recess operatively configured to engage said single raised pad during flexure of the knee joint; and wherein said one-piece tibial component and said one-piece femoral component are operatively configured to provide flexion as well as internal-external rotation articulation.