Load sharing femoral hip implant
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United States of America Patent
Stats
-
Jan 22, 1991
Issued Date -
N/A
app pub date -
Mar 30, 1990
filing date -
Aug 31, 1988
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A controlled stiffness elongated implant for use in the hip or other appropriate body joint. In the instance of the hip, a ball member fixed to the femur is rotatably engaged with a cup-shaped socket member fixed to the acetabulum of the pelvic bone. The ball member is mounted on one end of a femoral component which has an elongated stem receivable in the intramedullary canal of the femur. The stem has a generally longitudinally directed reduced mid-stem section. The dimension of the reduced mid-stem section is uniform or variable between the proximal and distal ends so as to affect the mass moment of inertia at any given location along the length of said stem to thereby achieve an optimal stem flexibility.
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