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US 11,730,492 B2Granted
Method and device for joint replacement
AssigneeZimmer, Inc.
InventorPatrick M Birmingham
Life of this patent
Estimating the term…
Abstract
A prosthesis including a hemiarthroplasty cup including an inner surface shaped and sized to accommodate a reamed or unreamed femoral head outer surface, and an outer surface shaped and sized to accommodate a reamed or unreamed acetabulum outer surface of an acetabulum socket, wherein the hemiarthroplasty cup is configured to maintain allowance of articulation of the femoral head outer surface and the acetabulum socket relative to the hemiarthroplasty cup after implantation.
Claims11
A prosthesis comprising:
- a hemiarthroplasty cup including:
- an inner surface shaped and sized to accommodate a reamed or unreamed femoral head outer surface of a femoral head, wherein the inner surface comprises a hemisphere and is porous,
- an outer surface shaped and sized to accommodate a reamed or unreamed acetabulum outer surface of an acetabulum socket, wherein the outer surface comprises a hemisphere and is smooth,
- an edge wall connecting the inner surface and the outer surface, the edge wall extending contiguously to form a planar and circular surface,
- wherein the hemiarthroplasty cup is configured to maintain allowance of articulation of the femoral head outer surface and the acetabulum socket relative to the hemiarthroplasty cup after implantation;
- a cup femoral head prosthesis comprising;
- a hemispherical inner surface configured to mate with a reamed femoral head outer surface;
- and
- a hemispherical outer surface configured to mate with and freely articulate against the inner surface of the hemiarthroplasty cup;
- and
- a receiving aperture extending between the inner surface and the outer surface, the receiving aperture configured to receive an end portion of a fastener;
- and
- a fastener couplable to the cup femoral head prosthesis at the receiving aperture to provide securement of the cup femoral head prosthesis to the femoral head outer surface,
- wherein the fastener comprises an end portion configured to be inserted into the receiving aperture without extending beyond the hemispherical outer surface.
11 more elements
A prosthesis system comprising:
- a femoral head prosthesis comprising:
- an exterior articulating surface;
- an interior bone-engaging surface;
- and
- a receiving aperture extending from the exterior articulating surface to the interior bone-engaging surface at a central portion of the femoral head prosthesis;
- a hemiarthroplasty cup comprised of solid material including:
- an inner surface shaped and sized to freely articulate against an outer surface of the femoral head prosthesis;
- and
- an outer surface shaped and sized to accommodate a reamed or unreamed acetabulum outer surface of an acetabulum socket, wherein the hemiarthroplasty cup is configured to maintain allowance of articulation of the femoral head prosthesis outer surface and the acetabulum socket relative to the hemiarthroplasty cup after implantation;
- and
- a cannulated screw comprising:
- a threaded end portion securable to the femoral head prosthesis at the receiving aperture such that the threaded end portion does not extend through the receiving aperture;
- and
- an anchoring head disposed at an end of the cannulated screw opposite the threaded end portion.
11 more elements
Dependencies are inferred from the claim text.