Patent ID: 8211181
Filing Date: 2012-07-03
Classification: A61F

Abstract:
1. A knee prosthesis comprising: a tibial component comprising a tibial surface that includes two laterally opposed condyle receiving areas separated by a center ramp that descends, in an anterior to posterior direction, relative to said two laterally opposed condyle receiving areas, and blends into said tibial surface, said center ramp having concave sloped sidewalls, said tibial surface further comprising a first elevated ramp located at the postero-lateral corner of said tibial surface and forming a lateral edge that defines a lateral tibial side height and a second elevated ramp located at postero-medial corner of said tibial surface and forming a medial edge that defines a medial tibial side height, wherein said lateral and medial tibial side heights increase in the anterior to posterior direction; and a femoral component comprising condylar outer surfaces, in articulating contact with said condyle receiving areas, that have sagittal profile radii that decrease along an arcuate curve in a direction from a proximal-anterior portion of said femoral component to a proximal-posterior portion of said femoral component, wherein profiles of frontal plane sections comprise frontal radii that form lower portions of said condylar outer surfaces, said frontal radii define femoral side heights that increase with increases in flexure angle of said femoral component.