Glenoid trial and implant assembly for reverse total shoulder arthroplasty and method of use

Patent metadata

Field	Value
Publication number	US-2016287401-A1
Application number	US-201514678032-A
Country	US
Kind code	A1
Filing date	Apr 3, 2015
Priority date	Apr 3, 2015
Publication date	Oct 6, 2016
Grant date	—

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.

First claim

What is claimed is:

1 . A glenoid trial and implant assembly for reverse total shoulder arthroplasty comprising:
a glenoid baseplate component including a primary bore, wherein said glenoid baseplate component is configured for fixation to a glenoid; an adapter assembly including an adapter, said adapter including an adapter flange and a body portion extending from said adapter flange, wherein said body portion is received in said primary bore of said glenoid baseplate component; a glenoid trial presenting a lateral glenoid trial face that has a bulbus shape and a medial glenoid trial face that defines a glenoid trial cavity, wherein said glenoid trial is coupled to said adapter assembly when said glenoid trial and implant assembly is in a trialing configuration; a glenoid implant presenting a lateral glenoid implant face that has a bulbus shape and a medial glenoid implant face that defines a glenoid implant cavity, wherein said bulbus shape of said lateral glenoid implant face matches said bulbus shape of said lateral glenoid trial face, and wherein said glenoid implant is coupled to said adapter assembly when said glenoid trial and implant assembly is in an installed configuration; a humeral cup presenting a concave surface, wherein said concave surface of said humeral cup abuts said lateral glenoid trial face when said glenoid trial and implant assembly is in said trialing configuration, and wherein said concave surface of said humeral cup abuts said lateral glenoid implant face when said glenoid trial and implant assembly is in said installed configuration; said adapter assembly including an adapter plate coupled to said adapter, said adapter plate abutting said adapter flange, wherein said adapter plate and said adapter are discrete components, wherein said adapter plate is received in said glenoid trial cavity when said glenoid trial and implant assembly is in said trialing configuration, and wherein said adapter plate is received in said glenoid implant cavity when said glenoid trial and implant assembly is in said installed configuration; a temporary connection releasably coupling said glenoid trial to said adapter assembly that provides separation of said glenoid trial and said adapter assembly without requiring disassembly of said adapter assembly; and a permanent connection fixedly coupling said glenoid implant to said adapter assembly.

2 . A glenoid trial and implant assembly as set forth in claim 1 , wherein said temporary connection is a magnetic connection between said glenoid trial and said adapter assembly.

3 . A glenoid trial and implant assembly as set forth in claim 2 , wherein said magnetic connection includes at least one of an adapter plate magnet that is carried on said adapter plate and a glenoid trial magnet that is carried on said glenoid trial.

4 . A glenoid trial and implant assembly as set forth in claim 2 , wherein said magnetic connection includes at least one adapter plate magnet carried on said adapter plate and at least one glenoid trial magnet carried on said glenoid trial.

5 . A glenoid trial and implant assembly as set forth in claim 1 , wherein said permanent connection includes a press fit between said adapter plate and said glenoid implant, said adapter plate and said glenoid implant each including complementary tapers such that said adapter plate becomes fixed to said glenoid implant when said adapter assembly is pressed into said glenoid implant cavity.

6 . A glenoid trial and implant assembly as set forth in claim 1 , further comprising:
a positioning guide including a hub and a positioning guide flange that extends outwardly from said hub, said hub defining a hub cavity that receives said adapter plate and said positioning guide flange having a plurality of annular rings each representing different glenoid trial sizes.

7 . A glenoid trial and implant assembly as set forth in claim 6 , wherein said positioning guide is magnetically retained on said adapter plate.

8 . A glenoid trial and implant assembly as set forth in claim 1 , wherein said adapter assembly includes an adapter fastener coupling said adapter plate to said adapter, said adapter fastener including an adapter fastener head that tightens against said adapter plate and that is entirely covered by said glenoid trial when said glenoid trial and implant assembly is in said trialing configuration.

9 . A glenoid trial and implant assembly for reverse total shoulder arthroplasty where said glenoid trial and implant assembly is disposed between a humerus and a glenoid of a human body when said glenoid trial and implant assembly is in an installed configuration and when said glenoid trial and implant assembly is in a trialing configuration, said glenoid trial and implant assembly comprising:
a glenoid baseplate component configured to be surgically coupled to the glenoid, said glenoid baseplate component including a primary bore; a adapter assembly including an adapter, said adapter having a body portion that is received in said primary bore of said glenoid baseplate component; a glenoid trial presenting a lateral glenoid trial face that has a bulbus shape and a medial glenoid trial face that defines a glenoid trial cavity, wherein said glenoid trial is coupled to said adapter assembly when said glenoid trial and implant assembly is in the trialing configuration; a glenoid implant presenting a lateral glenoid implant face that has a bulbus shape and a medial glenoid implant face that defines a glenoid implant cavity, wherein said bulbus shape of said lateral glenoid implant face matches said bulbus shape of said lateral glenoid trial face, and wherein said glenoid implant is coupled to said adapter assembly when said glenoid trial and implant assembly is in the installed configuration; a humeral cup presenting a concave surface, wherein said concave surface of said humeral cup abuts said lateral glenoid trial face when said glenoid trial and implant assembly is in the trialing configuration, wherein said concave surface of said humeral cup abuts said lateral glenoid implant face when said glenoid trial and implant assembly is in the installed configuration, and wherein said humeral cup is configured to be surgically coupled to the humerus; said adapter assembly including an adapter plate, wherein said adapter plate is received in said glenoid trial cavity when said glenoid trial and implant assembly is in the trialing configuration, and wherein said adapter plate is received in said glenoid implant cavity when said glenoid trial and implant assembly is in the installed configuration; a magnetic connection releasably coupling said glenoid trial to said adapter assembly; and a permanent connection fixedly coupling said glenoid implant to said adapter assembly.

10 . A glenoid trial and implant assembly for reverse total shoulder arthroplasty where said glenoid trial and implant assembly is disposed between a humerus and a glenoid of a human body, said glenoid trial and implant assembly comprising:
a baseplate assembly including a glenoid baseplate component and a primary fastener; said glenoid baseplate component including a primary bore that extends through said glenoid baseplate component; said primary fastener extending through said primary bore and projecting from said glenoid baseplate component to fix said glenoid baseplate component to the glenoid; said primary fastener having a primary fastener head presenting a rotation interface; an adapter assembly including an adapter and an adapter plate; said adapter including an adapter bore, an adapter flange, and a body portion extending from said adapter flange to a medial body portion end, wherein said body portion is received in said pr

Assignees

• Biomet Mfg Llc

Inventors

• Muir Nicholas
• Isch Bryce
• Winslow Nathan

Classifications

• A61F2002/30943

  using mathematical models · CPC title

• A61F2002/4022

  having a concave shape, e.g. hemispherical cups · CPC title

• A61F2002/30538

  for adjusting angular orientation · CPC title

• A61F2002/30553

  for adjusting a position by translation along an axis · CPC title

• A61F2/4014

  Humeral heads or necks; Connections of endoprosthetic heads or necks to endoprosthetic humeral shafts · CPC title