# US 10,245,164 B2 · Glenoid trial and implant assembly for reverse total shoulder arthroplasty and method of use > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,245,164 B2 - Document ID: US10245164B2 - Status: Granted - Kind: B2 - Application number: 15/368,927 - Filed: 2016-12-05 - Published: 2017-06-22 - Granted: 2019-04-02 - Earliest claimed: 2015-04-03 - Assignees: Biomet Manufacturing, LLC - Applicants: Biomet Manufacturing, LLC - Inventors: Nicholas Muir; Bryce A. Isch; Nathan A. Winslow - Web page: https://patentgrep.com/patent/US10245164B2 ## CPC - A61F 2/4684: {Trial or dummy prostheses} - A61F 2/40: for shoulders - A61F 2/4014: {Humeral heads or necks; Connections of endoprosthetic heads or necks to endoprosthetic humeral shafts} - A61F 2/4081: {Glenoid components, e.g. cups} - A61B 17/86: Pins or screws {or threaded wires; nuts therefor (A61B17/72 take precedence)} - A61F 2/30942: {for designing or making customized prostheses, e.g. using templates, CT or NMR scans, finite-element analysis or CAD-CAM techniques} - A61F 2/4059: {Humeral shafts} - A61F 2002/30079: {magnetic} - A61F 2002/30143: {hexagonal} - A61F 2002/30329: {Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements} - A61F 2002/30332: {Conically- or frustoconically-shaped protrusion and recess} - A61F 2002/30538: {for adjusting angular orientation} - A61F 2002/3055: {for adjusting length} - A61F 2002/30553: {for adjusting a position by translation along an axis} - A61F 2002/30604: {modular} - A61F 2002/30649: {Ball-and-socket joints} - A61F 2002/30672: {temporary} - A61F 2002/30774: {internally-threaded} - A61F 2002/30878: {with non-sharp protrusions, for instance contacting the bone for anchoring, e.g. keels, pegs, pins, posts, shanks, stems, struts} - A61F 2002/30881: {Circumferential ribs, flanges or fins} - A61F 2002/30943: {using mathematical models} - A61F 2002/4022: {having a concave shape, e.g. hemispherical cups} - A61F 2002/4085: {having a convex shape, e.g. hemispherical heads} - A61F 2250/006: modular - A61F: FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS (dental prosthetics A61C) - A61B: DIAGNOSIS; SURGERY; IDENTIFICATION (usefulness limited to only animals A61D) ## Abstract A glenoid trial and implant assembly for use in reverse total shoulder arthroplasty is provided along with a method for using the same. The glenoid trial and implant assembly includes a baseplate assembly, an adapter assembly, a glenoid trial, a glenoid implant, a humeral cup, and a positioning guide. The glenoid trial is coupled to the adapter assembly when the glenoid trial and implant assembly is assembled in a trialing configuration. The glenoid implant is coupled to the adapter assembly when the glenoid trial and implant assembly is assembled in an installed configuration. A temporary connection, which may be magnetic, releasably couples the glenoid trial to the adapter assembly and provides separation of the glenoid trial and the adapter assembly without requiring disassembly of the adapter assembly. A permanent connection fixes the glenoid implant to the adapter assembly. ## Claims ### Claim 1 A glenoid trial and implant assembly for reverse total shoulder arthroplasty comprising: a glenoid baseplate component including a baseplate bore; an adapter assembly including an adapter and an adapter plate, the adapter including a body portion, the body portion configured to be received in the baseplate bore of the glenoid baseplate component, the adapter plate including a plate magnet; a glenoid trial that defines a lateral glenoid trial face, wherein the glenoid trial includes a glenoid trial magnet configured to couple the adapter assembly to the glenoid trial via the plate magnet when the glenoid trial and implant assembly is in a trialing configuration; a glenoid implant that defines a lateral glenoid implant face, the glenoid implant being configured to be coupled to the adapter assembly when the glenoid trial and implant assembly is in an installed configuration; a positioning guide including a hub and a positioning guide flange that extends outwardly from the hub, the hub defining a hub cavity that receives the adapter plate and the positioning guide flange comprising a plurality of annular rings each representing different glenoid trial sizes; and a humeral cup including a concave surface, the concave surface of the humeral cup configured to abut the lateral glenoid trial face when the glenoid trial and implant assembly is in the trialing configuration, and the concave surface of the humeral cup configured to abut the lateral glenoid implant face when the glenoid trial and implant assembly is in the installed configuration. ### Claim 2 (depends on 1) The glenoid trial and implant assembly of claim 1, wherein the plate magnet is recessed within a plurality of magnet cavities defined by the adaptor plate. ### Claim 3 (depends on 1) The glenoid trial and implant assembly of claim 1, wherein the glenoid trial magnet is recessed within a plurality of magnet cavities defined by the glenoid trial. ### Claim 4 (depends on 1) The glenoid trial and implant assembly of claim 1, wherein the adapter plate and the glenoid implant each include complementary tapers to connect the adapter plate to the glenoid implant when the adapter assembly is pressed into the glenoid implant cavity. ### Claim 5 (depends on 4) The glenoid trial and implant assembly of claim 4, wherein the positioning guide is magnetically retained on the adapter plate. ### Claim 6 (depends on 1) The glenoid trial and implant assembly of claim 1, wherein the adapter assembly includes an adapter fastener coupling the adapter plate to the adapter, the adapter fastener including an adapter fastener head configured to tighten against the adapter plate such that the adapter fastener head is entirely covered by the glenoid trial when the glenoid trial and implant assembly is in the trialing configuration. ### Claim 7 (depends on 1) The glenoid trial and implant assembly of claim 1, wherein a bulbus shape of a lateral glenoid implant face matches a bulbus shape of a lateral glenoid trial face. ### Claim 8 (depends on 1) The glenoid trial and implant assembly of claim 1, wherein the adapter includes an adapter flange and the body portion extends from the adapter flange. ### Claim 9 A glenoid trial and implant assembly for reverse total shoulder arthroplasty comprising: a glenoid baseplate defining a baseplate bore; an adapter assembly including: an adapter, an adapter plate having a body portion sized to be received in the baseplate bore, the adapter plate including a plate magnet imbedded within a lateral adaptor plate face, and an adapter fastener configured to couple the adapter plate to the adapter, the adapter fastener including an adapter fastener head configured to tighten against the adapter plate in a trial state; a glenoid trial including a lateral glenoid trial face, a medial glenoid trial face, and a glenoid trial magnet imbedded within the medial glenoid trial face, the glenoid trial magnet and the plate magnet configured to magnetically couple the glenoid trial to the adapter when in the trial state; a glenoid implant including a lateral glenoid implant face and a medial glenoid implant face that defines a glenoid implant cavity, a curvature of the lateral glenoid implant face matching a curvature of the lateral glenoid trial face, wherein the adapter plate is positioned within the glenoid implant cavity when in an installed state; and a humeral cup including a concave surface, wherein the concave surface of the humeral cup abuts the lateral glenoid trial face when in the trial state, and wherein the concave surface of the humeral cup abuts the lateral glenoid implant face when in the installed state. ### Claim 10 (depends on 9) The glenoid trial and implant assembly of claim 9, further comprising a positioning guide including a hub and a positioning guide flange that extends outwardly from the hub, the huh defining a hub cavity configured to receive the adapter plate, the positioning guide flange comprising a plurality of annular rings each representing different glenoid trial sizes. ### Claim 11 (depends on 10) The glenoid trial and implant assembly of claim 10, wherein the positioning guide is magnetically retained on the adapter plate. ### Claim 12 A glenoid trial and implant assembly for reverse total shoulder arthroplasty comprising: a baseplate assembly including a glenoid baseplate component and a baseplate fastener, the glenoid baseplate component defining a baseplate bore sized to receive the baseplate fastener having a rotation interface; an adapter assembly including an adapter, an adapter plate, and a locking projection, the adapter including an adapter bore, an adapter flange, and a body portion extending from the adapter flange to a medial body portion end, the body portion sized to be received in the baseplate bore, the locking projection extending from the body portion and configured to be received in and engage the rotation interface of the baseplate fastener to prevent rotation of the adapter relative to the baseplate fastener and the glenoid baseplate component when in a trial state and in an installed state; a glenoid trial including a lateral glenoid trial face and a medial glenoid trial face that defines a glenoid trial cavity sized to receive the adapter plate, the glenoid trial magnetically coupled to the adapter assembly when in the trial state; a glenoid implant including a lateral glenoid implant face and a medial glenoid implant face that defines a glenoid implant cavity, a bulbus shape of the lateral glenoid implant face matching a bulbus shape of the lateral glenoid trial face, the glenoid implant coupled to the adapter assembly when in the installed state; and a humeral cup including a concave surface that abuts the lateral glenoid trial face when in the trial state and the concave surface abuts the lateral glenoid implant face when in the installed state. ### Claim 13 (depends on 12) The glenoid trial and implant assembly of claim 12, wherein the locking projection and the rotation interface of the baseplate fastener each have a hexagonal shape. ### Claim 14 (depends on 12) The glenoid trial and implant assembly of claim 12, wherein the adapter plate is configured to be coupled to the adapter, and the adapter plate and the adapter are discrete components of the adapter assembly. ### Claim 15 (depends on 14) The glenoid trial and implant assembly of claim 14, wherein the adapter plate includes a lateral adapter plate face and a medial adapter plate face, the lateral adapter plate face being disposed within the glenoid trial cavity adjacent the medial glenoid trial face when in the trial state and is disposed in the glenoid implant cavity adjacent the medial glenoid implant face when in the installed state. ### Claim 16 (depends on 15) The glenoid trial and implant assembly of claim 15, wherein the medial adapter plate face defines a medial adapter plate cavity that receives the adapter flange, the medial adapter plate cavity being larger than the adapter flange and elongated along an offset direction such that the adapter may be shifted relative to the adapter plate in the offset direction when in the trial state. ### Claim 17 (depends on 16) The glenoid trial and implant assembly of claim 16, wherein the adapter plate includes a pass-through that extends between and is open to the lateral adapter plate face and the medial adapter plate cavity. ### Claim 18 (depends on 17) The glenoid trial and implant assembly of claim 17, wherein the adapter assembly includes an adapter fastener that extends through the pass-through and into the adapter bore to selectively fix the adapter plate to the adapter, the pass-through being elongated along the offset direction such that the adapter may be shifted relative to the adapter plate in the offset direction when the glenoid trial and implant assembly is in the trialing configuration, the adapter fastener having an adapter fastener head that tightens against the adapter plate to fix the adapter plate in place relative to the adapter at an offset position located along the offset direction. ### Claim 19 (depends on 18) The glenoid trial and implant assembly of claim 18, wherein the adapter includes a pin bore extending into the adapter bore, the adapter fastener including a first stop spaced from the adapter fastener head and a second stop spaced from the first stop, the first and second stops extending outwardly from the adapter fastener, the adapter assembly including a pin sized to be received in the pin bore and limit axial movement of the adapter fastener.