Shoulder implant assembly
AssigneeBiomet Manufacturing, LLC
InventorsJason M. Shultz, Nathan A. Winslow, Dean E. Smeltzer, Kevin T. Stone
Life of this patent
Estimating the term…
Abstract
An implant assembly and associated method for selectively performing reverse and traditional arthroplasty for a shoulder joint that includes a humerus and a glenoid. The implant assembly may include a head, a cup, a humeral stem and an adaptor. The method includes inserting the humeral stem to the humerus and connecting a male taper of the adaptor to a female taper of the head. For reverse arthroplasty, the method includes attaching the adaptor to the glenoid and the cup to the stem. For traditional arthroplasty, the method includes attaching the adaptor to the humeral stem and the cup to the glenoid. The method also includes articulating the head with the cup.
Claims35
An implant assembly for a shoulder joint having a humerus and a glenoid, the assembly comprising:
- a first head bounded by a first convex surface and a first base, the first base including a first coupling mechanism having a first diameter configured to mate the head to the glenoid;
- a second head bounded by a second convex surface and a second base, the second base having a second coupling mechanism having a second diameter;
- a humeral stem configured to be inserted in the humerus;
- a cup attachable to the stem and having a concave surface configured to articulate with the convex surface of the head, and a second adaptor disposed between the humeral stem and the cup;
- and
- a glenoid fixation component having a coupling surface configured to be mated with a prepared glenoid coupling surface, and an outward facing surface, defined on the outward facing surface is a boss portion defining an exterior locking taper and an interior locking taper, said glenoid fixation component defines a plurality of bone fixation holes, wherein one of the first head and the second head are selectively couplable to the glenoid fixation component, said first coupling mechanism is configured to be coupled to the exterior locking taper in a first configuration, said second coupling mechanism is configured to be coupled to the interior locking taper in a second configuration, and wherein the first head is configured to not engage the interior locking taper when in the first configuration.
An assembly of implant components for a shoulder joint having a humerus and a glenoid, the assembly comprising:
- a humeral stem;
- a first head having a first convex surface having a first coupling taper with a first diameter;
- a second head heaving a second convex surface and a second coupling mechanism defining an interior bore having a second diameter;
- a cup configured to articulate with the convex surface of the head;
- a glenoid fixation component having a coupling surface and an outward facing surface configured to selectively couple to one of the first or second heads, defined on the outward facing surface is a boss portion defining an exterior male locking taper and an interior female locking taper;
- and
- a humeral adaptor for traditional shoulder arthroplasty, wherein the humeral adaptor is configured to connect the head to the humeral stem when the cup is connected to the glenoid, said adaptor having offset coupling tapers configured to allow relative displacement between the head and the glenoid, wherein the second coupling mechanism mates with only the exterior male locking taper and wherein the first coupling taper is configured to couple with only the interior female mating taper.
An assembly of implant components for a shoulder joint having a humerus and a glenoid, the assembly comprising:
- a plurality of humeral stems;
- a first head having a first head diameter having a first coupling taper with a first taper diameter;
- a second head having a second head diameter and having a second coupling taper with a second taper diameter smaller than the first taper diameter;
- a monolithic glenoid fixation component having a curved coupling surface configured to be mated with a prepared coupling surface, and an outward facing surface, a boss portion configured to mate with one of the plurality of heads, said boss defining on the outward facing surface an exterior locking taper configured to mate with the first taper and an interior locking taper configured to mate with the second taper, said glenoid fixation component defines a plurality of bone fixation holes, wherein only one of the exterior locking taper or the interior locking taper is engaged when one of the first or second head is coupled to the glenoid fixation component;
- a plurality of cups configured to articulate with corresponding heads;
- and
- a plurality of offset glenoid adaptors for a reverse shoulder arthroplasty, and a plurality of humeral adaptors for traditional shoulder arthroplasty, wherein each offset glenoid adaptor is configured to connect one of the heads to the glenoid when one of the cups is connected to one of the humeral stems, and wherein each humeral adaptor is configured to connect one of the heads to one of the humeral stems when one of the cups is connected to the glenoid.
Dependencies are inferred from the claim text.