Elbow joint prostheses
AssigneeHowmedica Osteonics Corp.
InventorsMatthew Victor Kartholl, Brad Alan Parker, Kevin Alika Farley, Ryan D. Koepke
Life of this patent
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Abstract
A radial head assembly is provided that includes a stem, a collar, a locking ring, and an articular member. The stem has a convex articular head on one end thereof. The locking ring has a ring wall, which has a ring opening. The ring wall has an angular outer surface and a slot configured to permit the ring wall to radially expand. The angular outer surface engages an angular portion of an interior surface of the collar. The articular member and the locking ring define an articular space within the collar. The articular space is configured to receive the convex articular head.
Claims19
A surgical method, comprising:
- attaching a distal portion of a stem to a first bone;
- placing an opening of an articular assembly on a proximal end of the stem, the articular assembly comprising:
- a concave surface disposed on the articular assembly opposite the opening to face a second bone opposite the first bone, a collar defining the opening, a space extending from the opening into the interior of the articular assembly, an interior surface proximate to the opening, and a trapping member at least partially disposed in the opening;
- and
- advancing a proximal end of the stem through the trapping member such that the proximal end is at least partially disposed between the trapping member and the concave surface and the trapping member is disposed between the proximal end of the stem and the interior trapping surface,
- wherein the articular assembly further comprises an articular member and a locking ring, and wherein the articular member comprises the trapping member and the concave surface.
A method, comprising:
- attaching a distal portion of a stem to a first bone;
- placing an opening of an articular assembly on a proximal end of the stem, the articular assembly comprising:
- a collar comprising a collar wall defining a first collar opening, a second collar opening, and a passage therethrough, the collar wall having an interior collar surface comprising a collar engagement feature proximate to the first collar opening;
- and
- an articular member comprising:
- a first concave surface;
- and
- a second concave surface disposed at an end of the articular member opposite to the first concave surface;
- and
- wherein the articular member at least partially defines an articular space within the collar when disposed in the collar;
- and
- advancing the proximal end of the stem through the articular assembly such that the proximal end is at least partially disposed between the articular member and the first concave surface and the articular member is disposed between the proximal end of the stem and an interior trapping surface.
A surgical method, comprising:
- attaching a distal portion of a stem to a first bone;
- placing an opening of an articular assembly on a proximal end of the stem, the articular assembly comprising:
- a collar defining the opening and a space extending from the opening into the interior of the articular assembly;
- an interior surface proximate to the opening;
- a trapping member at least partially disposed in the opening;
- and
- an articular member comprising a first concave surface and a second concave surface disposed at an end of the articular member opposite to the first concave surface;
- and
- advancing a proximal end of the stem through the trapping member such that the proximal end is at least partially disposed between the trapping member and the first concave surface and the trapping member is disposed between the proximal end of the stem and the interior trapping surface.
Dependencies are inferred from the claim text.