Humeral implant having a floating bearing

Patent metadata

Field	Value
Publication number	US-10405985-B2
Application number	US-201715477231-A
Country	US
Kind code	B2
Filing date	Apr 3, 2017
Priority date	Feb 7, 2012
Publication date	Sep 10, 2019
Grant date	Sep 10, 2019

Abstract

An implant includes a fixed bearing, a floating bearing, and a coupling member. The fixed bearing defines a generally first spherical articulating surface and a stop. The floating bearing includes a second spherical articulating surface and a planar articulating bearing surface. The coupling member defines a bearing surface that translates relative to the planar articulating bearing surface.

First claim

What is claimed is:

1. A method of assembling an implant comprising a fixed bearing having a first spherical articulating surface, a floating bearing having a second spherical articulating surface and a planar articulating bearing surface, and a coupling member having a bearing surface, the method comprising:
securing the coupling member relative to a bone,
securing the floating bearing to the coupling member by slidably coupling the planar articulating bearing surface relative to the bearing surface;
mating the first spherical articulating surface to the second spherical articulating surface; and wherein the floating bearing is freely translatable between the first position and the second position when the implant is implanted.

2. The method of claim 1 , further comprising contacting the floating bearing with the fixed bearing to translate the floating bearing relative to the coupling member.

3. The method of claim 2 , wherein contacting the floating bearing with the fixed bearing includes applying a force on the floating bearing with a stop.

4. The method of claim 1 , further comprising translating the floating bearing relative to the coupling member after the first spherical articulating surface is mated to the second spherical articulating surface.

5. The method of claim 1 , wherein slidably coupling the planar articulating bearing surface relative to the bearing surface includes sliding a coupling portion of the floating bearing into a slot defined by the coupling member.

6. The method of claim 5 , wherein the coupling portion of the floating bearing and the slot defined by the coupling member form a dovetail joint.

7. The method of claim 1 , wherein securing the coupling member relative to the bone includes:
implanting a stem into a canal of the bone; and
securing the coupling member to the stem.

8. The method of claim 1 , wherein the first articulation surface is generally convex.

9. The method of claim 1 , wherein the bone is a femur.

10. The method of claim 1 , wherein the bone is a humerus.

11. The method of claim 1 , wherein the floating bearing is repeatedly translatable between the first position and the second position when the implant is implanted.

Assignees

• Biomet Mfg Llc

Inventors

• Winslow Nathan A
• Mcdaniel John M

Classifications

• A61F2/4081

  Glenoid components, e.g. cups · CPC title

• A61F2002/30387

  Dovetail connection · CPC title

• A61B17/842

  Flexible wires, bands or straps (A61B17/72, A61B17/82, A61B17/86 take precedence) · CPC title

• A61F2002/30604

  modular · CPC title

• A61F2/34

  Acetabular cups · CPC title