Endoprosthesis for a hip joint

Details Endoprosthesis for a hip joint Endoprosthesis for a hip joint

1987-04-10

1989-05-30

Apley, Richard J.

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

Implantable prosthesis

Bone

A61F 234

Patent

active

048347590

ABSTRACT:
The external bowl of the hip joint endoprosthesis is provided with a plurality of circumferential rows of projections. In addition, each projection is provided with a flank in a plane perpendicular to the axis of symmetry of the bowl and a second flank which faces the equatorial plane of the bowl which defines an angle of from 15.degree. to 45.degree. with the other flank. Upon penetration into bone tissue, the flanks displace and condense the tissue to approximately the same extent so that the axial force components acting on the flanks are approximately equal. This reduces the tendency of the endoprosthesis to be expelled from the bone.

REFERENCES:
patent: 3820167 (1974-06-01), Sivash
patent: 4662891 (1987-05-01), Noiles

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