Prosthesis (i.e. – artificial body members) – parts thereof – or ai – Implantable prosthesis – Bone
Patent
1993-05-26
1994-07-05
Green, Randall L.
Prosthesis (i.e., artificial body members), parts thereof, or ai
Implantable prosthesis
Bone
A61F 238
Patent
active
053263618
ABSTRACT:
The invention is a total knee endoprosthesis with a fixed flexion-extension axis throughout all degrees of flexion and extension of the knee. The endoprosthesis has a femoral component with spaced apart medial and lateral condyle portions which slidably seat on a tibial implant portion. The fixed flexion-extension axis is directed inferiorly and posteriorly from the medial condyle portion to the lateral condyle portion and is offset from both the transverse and coronal planes equally by 3.0 to 3.8 degrees. A longitudinal axis through the tibia allows the tibia to rotate nonorthogonally and anteriorly of the flexion-extension axis. A patellar groove which is perpendicular to the flexion-extension axis. In the patellar groove slides an optional patellar component or the natural patella.
REFERENCES:
patent: 513378 (1992-07-01), Hollister
patent: 4085466 (1978-04-01), Goodfellow et al.
patent: 4261064 (1981-04-01), Helfet
patent: 4301553 (1981-11-01), Noiles
patent: 4462120 (1984-07-01), Rambert et al.
patent: 5047057 (1991-09-01), Lanes
patent: 5071438 (1991-12-01), Jones et al.
Green Randall L.
Research and Education Institute, Inc.
Willse D.
LandOfFree
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