Minimal contact prosthesis

Details Minimal contact prosthesis Minimal contact prosthesis

1995-08-31

1997-01-14

Shay, Randy C.

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

Implantable prosthesis

Bone

623 23, A61F 230

Patent

active

055934471

ABSTRACT:
A prosthetic device has first and second components engaging one another in a manner providing for minimal contact bearing surface area to reduce torque during relative motion of said first and second components. In an embodiment of the invention, the first component is an acetabular component and the second component is a femoral component, each adapted for implantation in respective bone structures. The acetabular component has a conical cavity with a circumferential recess and an apex area functional as a primary load bearing surface. The second component is a femoral component with a tapered portion ending in a femoral vertex. In operation, the femoral vertex engages the apex area permitting the femoral component to pivot through a range of normal cooperative motion of the femur and iliac bones.

REFERENCES:
patent: 4221623 (1980-09-01), Heissler et al.
patent: 5308412 (1994-05-01), Shetty et al.
patent: 5383936 (1995-01-01), Kubein-Meesenburg et al.
"Campbell's Operative Orthopaedics" Edited by A. H. Crenshaw, vol. Two, Seventh Edition, 1987, pp. 1213-1266.

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