Other

Volkmar Goymann

Emmanuel Anapliotis

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.

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Munich, Georgia

Volkmar Goymann