Cap for a femur head

Details Cap for a femur head Cap for a femur head

1991-09-30

1992-07-28

Frinks, Ronald

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

Implantable prosthesis

Bone

623 16, 623 18, A61F 236

Patent

active

051337690

ABSTRACT:
The cap for a femur head can be imbedded without the use of cement and includes an outer shell of hemispherical shape so that forces an be transferred in various positions of the joint without any discontinuity in the surface. In addition, an inner shell is secured within the outer shell and is provided with a conically tapered internal surface at the outer edge and an internal self-tapping screw thread for screwing onto a stump of a femur head. The shell also has an internal curved surface for abutting against the stump to inhibit continued threading of the cap onto the stump. Internal cutting rings may also be provided internally of the inner shell for cutting into the osseous tissue of the femur head.

REFERENCES:
patent: 3053251 (1962-09-01), Black et al.
patent: 3521302 (1970-07-01), Muller
patent: 4312079 (1982-01-01), Dorre et al.
patent: 4846841 (1989-06-01), Oh

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