Particular surface replacement prosthesis

Details Particular surface replacement prosthesis Particular surface replacement prosthesis

1983-03-10

1990-03-27

Apley, Richard J.

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

Implantable prosthesis

Bone

A61F 230

Patent

active

049117203

ABSTRACT:
An articular surface prosthesis composed of a porous material that is substantially noncorrodible and nonbiodegradible by body fluids. The prosthesis serves as a replacement of, for example, a femoral cap. The prosthesis fits over the femur which is shaped, typically, to a right circular cylinder outline, to receive the replacement which has a similarly shaped cavity. The prosthesis fits snugly over the femur and presents at the bone prosthesis interface coarse pores (e.g., 100 to 500 micrometers) to permit bone ingrowth; the pores are graded toward smaller or fine sizes (e.g., <50 micrometers) to prevent bone ingrowth and permit cartilage ingrowth at the articulating side of the prosthesis.

REFERENCES:
patent: 3808606 (1974-05-01), Tronzo
patent: 4000525 (1977-01-01), Klawitter
patent: 4156943 (1979-06-01), Collier
patent: 4546500 (1985-10-01), Bell

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