Expandable fusion device and method of installation thereof

Patent metadata

Field	Value
Publication number	US-12533244-B2
Application number	US-202418794086-A
Country	US
Kind code	B2
Filing date	Aug 5, 2024
Priority date	Jun 25, 2010
Publication date	Jan 27, 2026
Grant date	Jan 27, 2026

Abstract

The present invention provides an expandable fusion device capable of being installed inside an intervertebral disc space to maintain normal disc spacing and restore spinal stability, thereby facilitating an intervertebral fusion. In one embodiment, the fusion device includes a body portion, a first endplate, and a second endplate, the first and second endplates capable of being moved in a direction away from the body portion into an expanded configuration or capable of being moved towards the body portion into an unexpanded configuration. The fusion device is capable of being deployed and installed in both configurations.

First claim

What is claimed is:

1 . An expandable fusion device, comprising:
a first endplate; a second endplate; a body portion positioned between the first and second endplates; a translation member receivable within the body portion in between the first and second endplates, wherein the translation member includes at least three upper ramped surfaces that contact corresponding ramped portions of the first endplate and at least three lower ramped surfaces that contact corresponding ramped portions of the second endplate; an actuation member engaged with the translation member; and an interference nut operably attached to a rear section of the body portion and configured to minimize the risk of the actuation member being loosened prior to or during use.

2 . The expandable device of claim 1 , wherein the at least three upper ramped surfaces are sloped generally in the same direction and the at least three lower ramped surfaces are sloped generally in the same direction.

3 . The expandable device of claim 2 , wherein the actuation member is operatively attached to the interference nut.

4 . The expandable device of claim 3 , wherein the interference nut is configured to cause drag on the actuation member.

5 . The expandable device of claim 2 , wherein the body portion includes a pair of side slots each for receiving a stabilization member therein.

6 . The expandable device of claim 1 , wherein the actuation member is configured to pass through the interference nut.

7 . The expandable device of claim 1 , wherein the actuation member is configured to rotate and cause translation of the translation member.

8 . An expandable fusion device, comprising:
a first endplate; a second endplate; a body portion positioned between the first and second endplates; a translation member receivable within the body portion in between the first and second endplates, wherein the translation member includes at least three upper ramped surfaces that contact corresponding grooved portions of the first endplate and at least three lower ramped surfaces that contact corresponding grooved portions of the second endplate; an actuation member engaged with the translation member; and an interference nut operably attached to a rear section of the body portion, wherein the interference nut is configured to cause drag on the actuation member thus minimizing the risk of the actuation member being loosened prior to or during use.

9 . The expandable device of claim 8 , wherein the at least three upper ramped surfaces are sloped generally in the same direction and the at least three lower ramped surfaces are sloped generally in the same direction.

10 . The expandable device of claim 9 , wherein the actuation member is operatively attached to the interference nut.

11 . The expandable device of claim 10 , wherein the interference nut is configured to cause drag on the actuation member.

12 . The expandable device of claim 8 , wherein the body portion includes a pair of side slots each for receiving a stabilization member therein.

13 . The expandable device of claim 8 , wherein the actuation member is configured to pass through the interference nut.

14 . The expandable device of claim 8 , wherein the actuation member is configured to rotate and cause translation of the translation member.

Assignees

• Globus Medical Inc

Inventors

• Glerum Chad
• Weiman Mark

Classifications

• A61F2310/00179

  Ceramics or ceramic-like structures · CPC title

• A61F2310/00035

  Other metals or alloys · CPC title

• A61F2310/00023

  Titanium or titanium-based alloys, e.g. Ti-Ni alloys · CPC title

• A61F2310/00017

  Iron- or Fe-based alloys, e.g. stainless steel · CPC title

• A61F2002/30904

  serrated profile, i.e. saw-toothed · CPC title