04944756 is referenced by 93 patents and cites 11 patents.

A three-component knee joint prosthesis is disclosed including femoral, tibial and patellar components. During flexion of the prosthetic knee, the patellar component, which has a convex bearing surface, cooperates with and is guided by a patellar track defined by the anterior plate portion, lateral condylar bearing portion and medial condylar bearing portion of the femoral component and a web portion joining the two femoral condylar bearing portions. The inner regions of the two femoral condylar bearing portions are steeply sloped towards the web portion to permit the patellar component to "ride deeply" upon the femoral component at high degrees of flexion, thereby reducing quadriceps tension and expanding the permissible range of motion in flexion.

Title
Prosthetic knee joint with improved patellar component tracking
Application Number
7/151747
Publication Number
4944756
Application Date
February 3, 1988
Publication Date
July 31, 1990
Inventor
Robert V Kenna
Hobe Sound
FL, US
Agent
Elizabeth O Slade
Lawrence C Akers
Peter C Richardson
Assignee
Pfizer Hospital Products Group
NY, US
IPC
A61F 2/38
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