Two-part socket for hip-joint prosthesis

Details Two-part socket for hip-joint prosthesis Two-part socket for hip-joint prosthesis

1983-04-21

1989-01-03

Apley, Richard J.

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

Implantable prosthesis

Bone

623 18, A61F 232

Patent

active

047954701

ABSTRACT:
A prosthetic hip-joint socket for mounting in a cavity in a hip bone has an outer part having a generally part-spherical outer surface formed with a screwthread and an inner part complementarily fittable inside the outer part and having an acetabulum-forming recess. The outer part is of generally the same elasticity and deformability as the bone it is mounted in. In addition the inner part is received with slight play in the outer part. The screwthread is formed by a succession of thread-cutting teeth each having a relieved outer edge, with each cutting edge being spaced most from the axis at its leading end and arcing smoothly toward the axis back from this leading end toward its trailing end. The outer part is formed with an inner generally frustoconical surface centered on the axis and the inner part has a complementary surface engageable therewith.

REFERENCES:
patent: 3820167 (1974-06-01), Sivash
patent: 3840904 (1974-10-01), Tronlo
patent: 3918102 (1975-11-01), Eichler
patent: 4101985 (1978-07-01), Baumann et al.
patent: 4437193 (1984-03-01), Oh
"The Art of Total Hip Arthroplasty", William Thomas Stillwell, published by Harcourt Brace Jovanovich.
Girard "La Proshese Universelle De Lord", Catalog-Division of Howmedica, printed in France 1979.

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