Prosthetic knee joint with improved patellar component tracking

Details Prosthetic knee joint with improved patellar component tracking Prosthetic knee joint with improved patellar component tracking

1990-07-06

1991-07-30

Cannon, Alan W.

Surgery

Instruments

Orthopedic instrumentation

606 87, A61F 232, A61F 500

Patent

active

050357000

ABSTRACT:
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.

REFERENCES:
patent: 4335715 (1982-06-01), Kirkley
patent: 4739751 (1988-04-01), Sapega et al.

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