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US 10,702,388 B2Granted
Constrained dual mobility hip prosthesis
AssigneeHowmedica Osteonics Corp.
InventorMichael Ries
Life of this patent
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Abstract
A system includes a constrained acetabular insert, a dual mobility liner, and a femoral head. The constrained acetabular insert has its perimeter extending beyond hemisphere and the dual mobility liner has its perimeter extending beyond hemisphere and configured to tilt and rotate within the constrained acetabular insert. The femoral head is configured to tilt and rotate within the dual mobility liner. The constrained acetabular insert may include a plurality of tabs and the dual mobility liner may include screw threads for receiving the plurality of tabs.
Claims20
A system comprising:
- a constrained acetabular insert;
- a dual mobility liner;
- and
- a femoral head configured to tilt and rotate within the dual mobility liner;
- wherein the constrained acetabular insert comprises at least one tab having an edge portion;
- wherein the dual mobility liner comprises screw threads for receiving the edge portion of the at least one tab;
- and
- wherein when the screw threads are received entirely past the edge portion of the at least one tab, the dual mobility liner is free to tilt within the constrained acetabular insert.
5 more elements
A system comprising:
- a constrained acetabular insert defining a first cavity and comprising at least one tab having an edge portion;
- a dual mobility liner defining a second cavity and comprising an outer surface, wherein the outer surface comprises screw threads;
- and
- a femoral head configured to tilt and rotate within the second cavity;
- wherein the screw threads are configured to receive the edge portion of the at least one tab;
- and
- wherein when the dual mobility liner is fully contained within the constrained acetabular insert, the dual mobility liner is able to tilt and rotate within the first cavity.
4 more elements
A method comprising:
- engaging an edge portion of at least one tab of a constrained acetabular insert with screw threads on an outer surface of a dual mobility liner;
- and
- rotating the dual mobility liner relative to the constrained acetabular insert to pass the edge portion of the at least one tab entirely through the screw threads to insert the dual mobility liner within a cavity of the constrained acetabular insert, wherein once the edge portion of the at least one tab has been passed fully beyond the screw threads the dual mobility liner is configured to tilt and rotate within the constrained acetabular insert.
Dependencies are inferred from the claim text.