Expandable fusion device and method of installation thereof

Patent metadata

Field	Value
Publication number	US-11612498-B2
Application number	US-202016991303-A
Country	US
Kind code	B2
Filing date	Aug 12, 2020
Priority date	Jun 29, 2016
Publication date	Mar 28, 2023
Grant date	Mar 28, 2023

Abstract

The present invention provides an expandable fusion device capable of being inserted between adjacent vertebrae to facilitate the fusion process. The expandable fusion device may include first and second endplates, a translation member configured to expand an anterior side and/or posterior side of the device, a plurality of joists configured to connect the first and second endplates to the translation member, and first and second actuation members disposed internally to the device such that openings on a back side of the device can be used to expand or compress the anterior side, the posterior side, or both and such openings may also be used to introduce graft material into the device.

First claim

What is claimed is:

1. A method of installing an expandable fusion device, said method comprising:
preparing an intervertebral disc space by at least partially removing an intervertebral disc between adjacent vertebrae;
creating an exposed end surface on each of the adjacent vertebrae;
inserting an endoscopic tube into the disc space; and
introducing the expandable fusion device into the intervertebral disc space via the endoscopic tube,
wherein the expandable fusion device includes:
a first endplate;
a second endplate;
a first joist and a second joist connected to the first endplate;
a third joist and a fourth joist connected to the second endplate;
a translation member assembly in engagement with the first joist, second joist, third joist, and fourth joist;
a first actuation member in engagement with the translation member assembly, wherein the first actuation member is configured to move the first joist and the third joist such that the first endplate and the second endplate move in a direction away from the translation member assembly on a first side of the expandable fusion device; and
a second actuation member in engagement with the translation member assembly, wherein the second actuation member is configured to move the second joist and the fourth joist such that the first endplate and the second endplate move in a direction away from the translation member assembly on a second side of the expandable fusion device,
wherein the first actuation member and the second actuation member are parallel and operate independently of one another, and
wherein the first joist includes a pocket configured to receive a tab disposed on the first endplate.

2. The expandable fusion device of claim 1 , wherein the first side is an anterior side, and wherein the second side is a posterior side.

3. The method of claim 1 , further comprising a first anterior ramp frame and a second anterior ramp frame on the first side of the expandable fusion device.

4. The method of claim 1 , further comprising a first posterior ramp frame and a second posterior ramp frame on the second side of the expandable fusion device.

5. The method of claim 1 , wherein the translation member further comprises an anterior translation bar and a posterior translation bar.

6. The method of claim 5 , wherein the anterior translation bar engages the first joist and third joist.

7. The method of claim 6 , wherein the posterior translation bar engages the second joist and the fourth joist.

8. The method of claim 1 , wherein the expandable fusion device contains a front side and a back side, wherein the front side is configured to lead the fusion device into an intervertebral space, and the backside contains one or more openings to receive a tool to engage the first actuation member and second actuation member, and wherein the one or more openings are configured to receive graft material.

9. The method of claim 1 , wherein the translation member further comprises an anterior translation component containing an anterior bore, wherein the first actuation member is disposed within the anterior bore.

10. The method of claim 9 , wherein the translation member further comprises a posterior translation component containing a posterior bore, wherein the second actuation member is disposed within the posterior bore.

11. A method of installing an expandable fusion device, said method comprising:
preparing an intervertebral disc space by at least partially removing an intervertebral disc between adjacent vertebrae;
creating an exposed end surface on each of the adjacent vertebrae;
inserting an endoscopic tube into the disc space; and
introducing the expandable fusion device into the intervertebral disc space via the endoscopic tube,
wherein the expandable fusion device includes:
a first endplate;
a second endplate; and
a translation member disposed at least partially between the first endplate and the second endplate, wherein the translation member assembly includes:
an anterior translation component disposed on an anterior side of the expandable fusion device, wherein the anterior translation portion comprises an anterior bore; and
a posterior translation component disposed on a posterior side of the expandable fusion device, wherein the posterior translation portion comprises a posterior bore,

wherein the translation member is configured to expand the fusion device on an anterior side by moving an anterior side of the first endplate and an anterior side of the second endplate,
wherein the translation member is configured to expand the fusion device on a posterior side by moving a posterior side of the first endplate and a posterior side of the second endplate;
wherein the first endplate is engaged with the translation member via a first joist and a second joist,
wherein the second endplate is engaged with the translation member via a third joist and a fourth joist,
wherein a first actuation member and a second actuation member are parallel and operate independently of one another, and
wherein the first joist includes a pocket configured to receive a tab disposed on the first endplate.

12. The method of claim 11 , wherein the second joist comprises a cylindrical bore configured to receive a cylindrical stem disposed on the first endplate.

13. The method of claim 12 , wherein the third joist comprises a pocket configured to receive a tab disposed on the second endplate, and wherein the fourth joist comprises a cylindrical bore configured to receive a cylindrical stem disposed on the second endplate.

14. The method of claim 11 , further comprising a first and second anterior ramp frames on the anterior side and further comprising first and second posterior ramp frames on the posterior side.

15. The method of claim 11 , wherein the translation member further comprises an anterior translation bar and a posterior translation bar.

16. The method of claim 15 , wherein the anterior translation bar engages the first joist and third joist.

17. The method of claim 16 , wherein the posterior translation bar engages the second joist and the fourth joist.

18. The method of claim 11 , wherein the first actuation member is disposed within the anterior bore.

19. The method of claim 18 , wherein the second actuation member is disposed within the posterior bore.

20. A method of installing an expandable fusion device, said method comprising:
preparing an intervertebral disc space by at least partially removing an intervertebral disc between adjacent vertebrae;
creating an exposed end surface on each of the adjacent vertebrae;
inserting an endoscopic tube into the disc space; and
introducing the expandable fusion device into the intervertebral disc space via the endoscopic tube,
wherein the expandable fusion device includes:
a first endplate;
a second endplate;
a first joist and a second joist connected to the first endplate;
a third joist and a fourth joist connected to the second endplate;
a translation member assembly in engagement with the first joist, second joist, third joist, and fourth joist;
a first actuation member in engagement with the translation member assembly, wherein the first actuation member is configured to move the first joist and the third joist such that the first endplate and the second endplate move in a direction away from the translation member assembly on a first side of the expandable fusion device; and
a second actuation member in engagement with the translation member assembly, wherein the second actuation me

Assignees

• Globus Medical Inc

Inventors

• Hessler Tyler
• Glerum Chad
• Friedrich Adam
• Burkhardt Alex
• Zappacosta Jason
• Gahman Kevin
• Hansell Matthew
• Iott Andrew
• Kopp Hilliary
• Nichols Jeff
• Cryder Joel
• Karpowicz Edward
• Matthews John

Classifications

• A61F2/4425

  made of articulated components · CPC title

• A61F2/30771

  applied in original prostheses, e.g. holes or grooves · CPC title

• A61F2002/30556

  for adjusting thickness · CPC title

• A61F2002/30471

  connected by a hinged linkage mechanism, e.g. of the single-bar or multi-bar linkage type · CPC title

• A61F2002/30593

  hollow · CPC title