Plastic acetabulum

Details Plastic acetabulum Plastic acetabulum

1991-02-28

1992-12-15

Isabella, David

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

Implantable prosthesis

Bone

A61F 234

Patent

active

051712873

ABSTRACT:
A plastic acetabulum is provided with a plurality of cavities in the outer surface. Each cavity opens conically to the exterior of the acetabulum and the cavities are disposed in concentric rows about the axis of the acetabulum. The cavities are provided with a roughly fixed ratio of depth (t) to width (w) with the volume (v), depth (t) and width (w) decreasing from an edge of the acetabulum to a peak of the acetabulum. The depth and width of the cavities each decrease exponentially in proportion to the ratio of the diametric spacings of the cavity rows. Likewise, the volume of the cavities decrease exponentially from row-to-row in the direction of the peak of the acetabulum.

REFERENCES:
patent: 3740769 (1973-06-01), Haboush
patent: 3806960 (1974-04-01), Weber
patent: 4531243 (1985-07-01), Weber et al.
patent: 4871368 (1989-10-01), Wagner
patent: 5021063 (1991-06-01), Tager

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