Importance

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Abstract

An acetabular cup comprising a shell having inner and outer ends, a cavity having an outer opening at the outer end, a surface defining an inner opening at the inner end and external screw threads for threading the shell into the acetabulum and an insert having an external polar cap and a concave bearing surface of generally part spherical configuration opening at a mouth. The insert is adapted to receive a femoral head and has an overhang to reduce the likelihood of dislocation. The insert is receivable in the shell with the polar cap being received in the inner opening of the shell. Interlocking teeth on the surface of the shell and on the polar cap of the insert hold the insert in any of a plurality of different angular positions relative to the shell so that the desired angular orientation of the overhang can be obtained.

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First Claim