Joint socket for a hip joint prosthesis
First Claim
1. A joint socket for a hip joint prosthesis comprisinga body having an internal socket disposed about an axis of rotation and an exterior surface tapering inwardly towards one end symmetrically of said axis;
- a plurality of anchoring beads projecting from said exterior surface, each bead being of an outwardly increasing width in a direction towards said one end to widen conically relative to said axis of rotation; and
a plurality of ribs in each said bead disposed transversely to said axis, at least some of said ribs being elastic.
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Accused Products
Abstract
The socket body has an exterior surface which tapers in one direction while anchoring beads on the exterior surface taper in an opposite outward direction. The beads serve to anchor the body within a pelvis. In addition, cross ribs are formed on the anchoring beads with at least some of the ribs being elastic. Upon insertion of the socket, the ribs bend in a direction opposite to the direction of insertion. The two oppositely directed anchoring tapers of the socket body and the beads provide a firm fit of the socket body in a pelvis with a cement-free anchoring. Also, the bent ribs tend to resist withdrawal of the socket from the pelvis.
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Citations
7 Claims
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1. A joint socket for a hip joint prosthesis comprising
a body having an internal socket disposed about an axis of rotation and an exterior surface tapering inwardly towards one end symmetrically of said axis; -
a plurality of anchoring beads projecting from said exterior surface, each bead being of an outwardly increasing width in a direction towards said one end to widen conically relative to said axis of rotation; and a plurality of ribs in each said bead disposed transversely to said axis, at least some of said ribs being elastic. - View Dependent Claims (2, 3, 4, 5)
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6. A joint socket for a hip joint prosthesis comprising
a body having an internal socket disposed about an axis of rotation and an exterior surface tapering inwardly towards one end symmetrically of said axis; -
a plurality of anchoring beads projecting radially from said exterior surface between said ends, each bead being of an outwardly increasing width in a direction towards said one end to widen conically relative to said axis of rotation; and a plurality of ribs in each said bead disposed transversely to said axis, at least some of said ribs being elastic.
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7. A joint socket for a hip joint prosthesis comprising
a body having an internal socket disposed about an axis of rotation and an exterior trunco-conical surface tapering inwardly towards one end symmetrically of said axis; -
a plurality of anchoring beads projecting from said exterior surface, each bead being disposed on a generatrix of said body and being of an outwardly increasing width in a direction towards said one end to widen conically relative to said axis of rotation; and a plurality of ribs in each said bead disposed transversely to said axis, at least some of said ribs being elastic.
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Specification