Back to results
US 6,139,583 AGranted
Femoral prosthesis
OwnerLanny L. Johnsoninventor
Life of this patent
Estimating the term…
Abstract
A femoral prosthesis includes a stem tapered from its proximal end to its distal end, the stem having a substantially oval-shaped cross-section along its length. The stem has a twisted waist portion intermediate its ends whereby the major axes of the cross-section on opposite sides of the waist portion are disposed at an angle of approximately 90.degree. with respect to one another so as to conform with the geometry of an intramedullary canal within which the stem is to be received.
Claims3
A femoral prosthesis, comprising:
- a femoral stem tapered from a proximal end to a distal end thereof, said stem having a substantially oval-shaped cross-section along its length except for a waist portion located substantially midway between the proximal and distal ends of the prosthesis, said waist portion including a twist of substantially 90.degree. whereby major axes of oval cross-sections an opposite sides of the waist portion are disposed at an angle of substantially 90.degree. with respect to one another.
Dependencies are inferred from the claim text.