INLAY GLENOID IMPLANTS AND METHODS
Embodiments described herein relate to total shoulder arthroplasty devices and related systems, methods, and kits useful in implanting glenoid implants in the glenoid fossa of scapula bones. In some embodiments, a glenoid implant device is disclosed including a screw and a liner. In some embodiments, the liner is configured to decouple from the screw during a revision surgery. In some embodiments, the liner has an inner portion configured to couple with a driver to dispose the implant at least partially into a bone.
1 . A glenoid implant comprising:
a liner having a liner inner surface and a liner outer surface, the liner inner surface having a concave profile and configured to receive a corresponding convex surface of a humeral head or humeral implant; and
a screw having a mantle portion and a pedestal portion extending distally from the mantle portion, the mantle portion configured to be coupled with a distal portion of the liner outer surface such that the screw extends distally from the liner, the pedestal portion having one or more threads disposed thereabout configured to secure the implant to a glenoid fossa at an excision site thereof, such that the glenoid implant is configured to be disposed entirely or substantially entirely within the excision site, thereby having an inlay configuration.
2 . The glenoid implant of claim 1 , wherein one or both of the mantle portion and the pedestal portion comprise a porous material.
3 . The glenoid implant of claim 2 , wherein the porous material comprises an open cell porosity structure, a closed cell porosity structure, or a combination thereof.
4 . The glenoid implant of claim 1 , wherein the liner comprises an inner cavity portion about a distal portion of the liner inner surface.
5 . The glenoid implant of claim 4 , wherein the inner cavity portion has a generally cylindrical shape.
6 . The glenoid implant of claim 4 , wherein the inner cavity portion has a generally hexagonal prism shape.
7 . The glenoid implant of claim 1 , wherein the screw comprises a metal material.
8 . The glenoid implant of claim 1 , wherein the liner comprises a polyethylene material.
9 . The glenoid implant of claim 8 , further comprising an antioxidant material embedded in the polyethylene material.
10 . The glenoid implant of claim 1 , further comprising a textured interface disposed between the screw and the liner.
11 . The glenoid implant of claim 10 , wherein the textured interface has a checkerboard texture.
12 . The glenoid implant of claim 1 , further comprising at least one notch disposed in the liner outer surface.
13 . The glenoid implant of claim 12 , wherein the at least one notch includes a first notch and a second notch disposed in the liner outer surface.
14 . The glenoid implant of claim 12 , further comprising a plurality of indents disposed in the liner outer surface.
15 . The glenoid implant of claim 14 , wherein the plurality of indents have a generally concave shape.
16 . The glenoid implant of claim 14 , wherein the plurality of indents have a generally convex indent surface.
17 . The glenoid implant of claim 14 , wherein the plurality of indents are disposed at least partially in the at least one notch.
18 . The glenoid implant of claim 14 , wherein the plurality of indents are arranged radial-symmetrically about a longitudinal axis of the glenoid implant.
19 . The glenoid implant of claim 14 , wherein the indents are configured to retain bone cement to adhere the glenoid implant to the glenoid fossa.
20 . The glenoid implant of claim 1 , wherein the one or more threads comprise double helix threads.
21 . The glenoid implant of claim 1 , wherein the one or more threads is configured to secure the implant to a glenoid fossa through rotation therein.
22 . The glenoid implant of claim 1 , wherein the liner is configured to couple with the mantle portion of the screw through a threaded connection.
23 . The glenoid implant of claim 21 , wherein the liner is configured to decouple from the mantle portion of the screw through rotation.