Femoral stem with reduced coefficient of friction with respect t

Details Femoral stem with reduced coefficient of friction with respect t Femoral stem with reduced coefficient of friction with respect t

1996-12-12

1999-02-16

Milano, Michael J.

Prosthesis (i.e., artificial body members), parts thereof, or ai

Implantable prosthesis

Bone

623 16, 623 23, A61F 232

Patent

active

058715495

ABSTRACT:
An orthopedic device is provided having a femoral stem with a proximal end, a distal end, and an intermediate portion extending between the proximal end and the distal end. The intermediate portion tapers from a first cross-sectional geometry near the proximal end to a second cross-sectional geometry near the distal end. A surface region of the femoral stem has a coefficient of friction less than 0.3 with respect to a bone cement. The surface region can include a treated metal region integral with the stem, or a friction reducing coating or sheath that coats or covers a portion of the stem. A collar can be provided near the proximal end of the stem that has a greater diameter than the first diameter of the stem.

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pp. 679-685, of The Biomedical Engineering Handbook, (Joseph D. Bronzino, ed., CRC Press and IEEE Press 1995).

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