Artificial hip joint

Details Artificial hip joint Artificial hip joint

1993-02-25

1995-02-07

Isabella, David

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

Implantable prosthesis

Bone

623 18, A61F 234

Patent

active

053872444

ABSTRACT:
An artificial hip joint between a femur and a pelvis having increased rotational clearance on an internal side of the joint, including an acetabular cup for anchoring to the pelvis. The hip joint includes a femoral prosthesis having an elongated stem for anchoring to the femur with an upper end. A collar extends outwardly from the upper end and terminates in an end part opposite the upper end of the stem. A head portion is supported on the end part and pivotally mounted within the acetabular cup. The head and the end part have a common central axis. The collar includes a surface on the internal side that contacts the acetabular cup. The surface is offset from the common central axis in a direction away from the internal side so that the acetabular cup has increased rotational clearance on the interior side.

REFERENCES:
patent: 4141088 (1979-02-01), Treace et al.
patent: 4172296 (1979-10-01), D'Errico
patent: 4921500 (1990-05-01), Averill et al.
patent: 5062854 (1991-11-01), Noble et al.

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