Shoulder Prosthetic
AssigneeBiomet Manufacturing, LLC
InventorsNicholas J. KATRANA, Nathan A. WINSLOW
Life of this patent
Estimating the term…
Abstract
A shoulder implant assembly including a humeral stem, a head, a cup, and a taper adaptor. The humeral stem is configured to be inserted into a humerus bone. The head includes a metal substrate having a coupling taper and a polymeric cover mounted to the metal substrate having a convex outer surface and a generally planar base. The cup has a concave surface configured to articulate with the polymeric cover of the head. The taper adaptor is configured to mate with the coupling taper of the head. The taper adaptor is configured to connect the head to the stem when the cup is connected to a glenoid. The taper adaptor is configured to connect the head to the glenoid when the cup is connected to the humeral stem.
Claims20
A shoulder implant assembly comprising:
- a humeral stem configured to be inserted into a humerus bone;
- a head including:
- a metal substrate having a coupling taper;
- and
- a polymeric cover mounted to the metal substrate having a convex outer surface and a generally planar base;
- a cup having a concave surface configured to articulate with the polymeric cover of the head;
- and
- a taper adaptor configured to mate with the coupling taper of the head, the taper adaptor configured to connect the head to the stem when the cup is connected to a glenoid, and the taper adaptor configured to connect the head to the glenoid when the cup is connected to the humeral stem.
A shoulder implant assembly comprising:
- a humeral stem configured to be inserted into a humerus bone;
- a polymeric head including:
- a convex outer surface;
- a polymeric coupling taper;
- and
- a generally planar base;
- a cup having a concave surface configured to articulate with the polymeric head;
- and
- a taper adaptor configured to mate with the polymeric coupling taper of the head, the taper adaptor configured to connect the head to the stem when the cup is connected to a glenoid, and the taper adaptor configured to connect the head to the glenoid when the cup is connected to the humeral stem.
A shoulder implant assembly comprising:
- a humeral stem configured to be inserted into a humerus bone;
- a head including a metal substrate and a polymeric cover mounted to the metal substrate, the metal substrate including:
- a first base portion;
- a second base portion;
- a flange between the first base portion and the second base portion, the flange configured to secure the polymeric cover to the metal substrate;
- an anti-rotation layer on a side of the first base portion opposite to the flange;
- a coupling taper defined within the anti-rotation layer;
- and
- a plurality of tabs extending radially outward from the anti-rotation layer, the tabs configured to prevent the polymeric cover from rotating about the substrate;
- a cup including a unitary metallic base defining a concave articulating surface that is configured to articulate with the polymeric cover of the head;
- and
- a taper adaptor including a first male taper configured to mate with the coupling taper of the head and a second male taper configured to mate with the humeral stem, the first male taper is offset from the second male taper;
- wherein a first longitudinal axis extending through a center of the polymeric cover is parallel to and offset from a second longitudinal axis extending through a center of each of the coupling taper, the first base portion, and the second base portion;
- and
- wherein the polymeric cover is molded over the first base portion, the second base portion, and the flange, and is arranged between the tabs.
Dependencies are inferred from the claim text.