Expandable fusion device and method of installation thereof

Patent metadata

Field	Value
Publication number	US-9974662-B2
Application number	US-201615196231-A
Country	US
Kind code	B2
Filing date	Jun 29, 2016
Priority date	Jun 29, 2016
Publication date	May 22, 2018
Grant date	May 22, 2018

Abstract

The present invention provides an expandable fusion device capable of being inserted between adjacent vertebrae to facilitate the fusion process. A method of installing an expandable fusion device may comprise introducing the expandable fusion device into an intervertebral space, wherein the expandable fusion device comprises a proximal end, a distal end, an anterior side connecting the proximal end and the distal end, and a posterior side connecting the proximal end and the distal end, wherein the expandable fusion device has an anterior height on the anterior side and a posterior height on the posterior side. The method may further comprise adjusting the anterior height of the expandable fusion device independently from adjustment of the posterior height. The method can also include changing the lordotic angle.

First claim

What is claimed is:

1. An expandable fusion device comprising:
a first endplate;
first ramp frames that are pivotally coupled to the first endplate;
a second endplate;
second ramp frames that are pivotally coupled to the second endplate;
a translation member assembly in engagement with the first ramp frames and the second ramp frames, the translation member assembly comprising ramps on a first side of the expandable fusion device and ramps on a second side of the expandable fusion device;
a first actuation member in engagement with the translation member assembly on the first side of the expandable fusion device; and
a second actuation member in engagement with the translation member assembly on the second side of the expandable fusion device,
wherein the first ramp frames comprise a first anterior ramp frame and a first posterior ramp frame, and wherein the second ramp frames a second anterior ramp frame and a second posterior ramp frame.

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 expandable fusion device of claim 1 , wherein the first anterior ramp frame is pivotally coupled to the first endplate on the first side of the expandable fusion device, wherein the first posterior ramp frame is pivotally coupled to the first endplate on the second side of the expandable fusion device.

4. The expandable fusion device of claim 1 , wherein the second anterior ramp frame is pivotally coupled to the second ramp on the first side of the expandable fusion device, wherein the second posterior ramp frame is pivotally coupled to the second ramp on the second side of the expandable fusion device.

5. The expandable fusion device of claim 1 , wherein protrusions of the first endplate are engaged with mating features on the first ramped frames to form pivot points, and wherein protrusions on the second endplate are engaged with mating features on the second ramped frames to form pivot points.

6. The expandable fusion device of claim 1 , wherein the translation member assembly comprises:
an anterior translation portion disposed on the first side of the expandable fusion device, wherein the anterior translation portion comprises one or more ramps; and
a posterior translation portion in engagement with the anterior translation portion and disposed one the second side of the expandable fusion device, wherein the posterior translation portion is slidable with respect to the anterior translation portion, wherein the posterior translation portion comprises one or more ramps.

7. The expandable fusion device of claim 6 , further comprising an anterior ramped end disposed on the first side of the expandable fusion device and at a proximal end of the expandable fusion device; and a posterior ramped end in engagement with the anterior ramped end, wherein the posterior ramped end is disposed on the second side of the expandable fusion device and at the proximal end of the expandable fusion device, wherein the posterior ramped end is slidable with respect to the anterior ramped end.

8. The expandable fusion device of claim 7 , wherein the first actuation member comprises an actuation screw threaded through the anterior ramped end to engage the anterior translation portion, wherein rotation of the first actuation member in a first direction causes the anterior ramped end and the anterior translation portion to move towards one another.

9. The expandable fusion device of claim 7 , wherein the second actuation member comprises an actuation screw threaded through the posterior ramped end to engage the posterior translation portion, wherein rotation of the second actuation member in a first direction causes the posterior ramped end and the posterior translation portion to move towards one another.

10. The expandable fusion device of claim 1 , wherein the first actuation member and the second actuation member are independently rotatable to selective adjust anterior height and posterior height of the expandable fusion device.

11. An expandable fusion device comprising:
a first endplate;
a second endplate;
a translation member assembly disposed at least partially between the first endplate and the second endplate, wherein the translation member assembly comprises:
an anterior translation portion disposed on an anterior side of the expandable fusion device, wherein the anterior translation portion comprises one or more ramps;
a posterior translation portion in engagement with the anterior translation portion, wherein the posterior translation portion is disposed on a posterior side of the expandable fusion device, wherein the posterior translation portion is slidable with respect to the anterior translation portion, wherein the posterior translation portion comprises one or more ramps;
an anterior ramped end disposed on the anterior side of the expandable fusion device and at a proximal end of the expandable fusion device; and
a posterior ramped end in engagement with the anterior ramped end, wherein the posterior ramped end is disposed on the posterior side of the expandable fusion device and at the proximal end of the expandable fusion device, wherein the posterior ramped end is slidable with respect to the anterior ramped end;

a first actuation screw threaded through a bore in the anterior ramped end and engaging the anterior translation portion;
a second actuation screw threaded through a bore in the posterior ramped end and engaging the posterior translation portion;
anterior ramp frames disposed on the anterior side of the expandable fusion device that engage the ramps in the anterior translation portion to transfer motion of the anterior translation portion to the first endplate and the second endplate thereby pushing the first endplate and the second endplate outward increasing an anterior height of the expandable fusion device; and
posterior ramp frames disposed on the posterior side of the expandable fusion device that engage the ramps in the posterior translation portion to transfer motion of the posterior translation portion to the first endplate and the second endplate thereby pushing the first endplate and the second endplate outward increasing a posterior height of the expandable fusion device.

12. The expandable fusion device of claim 11 , wherein anterior ramped end comprises a body portion comprising ramps and the bore of the anterior ramped end, and wherein posterior ramped end comprises a body portion and the bore of the posterior ramped end.

13. The expandable fusion device of claim 11 , wherein the anterior ramp frames comprise a first anterior ramp frame pivotally coupled to the first endplate and a second anterior ramp frame pivotally coupled to the second endplate.

14. The expandable fusion device of claim 11 , wherein the posterior ramp frames comprise a first posterior ramp frame pivotally coupled to the first endplate and a second posterior ramp frame pivotally coupled to the second endplate.

15. A method of installing an expandable fusion device, the method comprising:
introducing the expandable fusion device into an intervertebral space, wherein the expandable fusion device comprises a proximal end, a distal end, an anterior side connecting the proximal end and the distal end, and a posterior side connecting the proximal end and the distal end, wherein the expandable fusion device has an anterior height on the anterior side and a posterior height on the posterior side;
adjusting the anterior height of the expandable fusion device independently from adjustment of the posterior height; and
adjusting the posterio

Assignees

• Globus Medical Inc

Inventors

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

Classifications

• A61F2002/30593

  hollow · CPC title

• A61F2002/443

  having two transversal endplates and at least one intermediate component · CPC title

• A61F2002/30556

  for adjusting thickness · CPC title

• A61F2002/30507

  using a threaded locking member, e.g. a locking screw or a set screw · CPC title

• A61F2/4425 Primary

  made of articulated components · CPC title