Expandable implant device

Patent metadata

Field	Value
Publication number	US-2019201210-A1
Application number	US-201816224582-A
Country	US
Kind code	A1
Filing date	Dec 18, 2018
Priority date	Dec 18, 2017
Publication date	Jul 4, 2019
Grant date	—

Abstract

Expandable implant devices including first and second endplates, wherein a first side of the first endplate is moveably attached to a first side of the second endplate; and an expansion mechanism is disposed between the first and second endplates adjacent the second side of the endplates opposite the first side, wherein actuating the expansion mechanism changes an angle between the first endplate and the second endplate.

First claim

What is claimed is:

1 . An expandable implant device comprising:
a first endplate having a bone contacting surface and an opposite interior surface, a first side and a second side, a second endplate having bone contacting surface and an opposite interior surface, a first side and a second side, wherein the first side of the first endplate is hingedly coupled to the first side of the second endplate; an expansion mechanism disposed between the interior surface of the first endplate and the interior surface of the second endplate, the expansion mechanism including a drive screw including at least one threaded shank, at least one threaded nut configured to engage at least a portion of the at least one threaded shank; and
at least one linkage coupled to the at least one threaded nut, the at least one linkage extending from the at least one threaded nut to the inferior surface of the first endplate.

2 . The expandable implant device of claim 1 wherein the expansion mechanism is disposed adjacent to the second sides of first and second endplates, wherein the second sides of the first and second endplates are opposite the first side.

3 . The expandable implant device of claim 1 wherein at least one of the first endplate or the second endplate includes a planar extension extending perpendicularly to the bone contacting surface of the at least one of the first endplate or second endplate.

4 . The expandable implant device of claim 3 wherein the planar extension is configured to enclose an inner volume of the expandable implant device.

5 . The expandable implant device of claim 4 wherein at least one of the first endplate or the second endplate further comprise at least one fusion aperture extending from the bone contacting surface of at least one of the first endplate or the second endplate into the inner volume of the expandable implant device.

6 . The expandable implant device of claim 1 further comprising a locking mechanism; wherein the locking mechanism is configured to prevent an undesired rotation of the drive screw.

7 . The expandable implant device of claim 6 wherein the drive screw further comprises:
a first threaded shank;
a second threaded shank; and
a spline configured to couple the first threaded shank and the second threaded shank.

8 . The expandable implant device of claim 7 , wherein the locking mechanism further comprises a spring configured to engage the spline.

9 . The expandable implant device of claim 1 , wherein the first endplate has a leading end and a trailing end, the trailing end including an aperture in communication with an inner volume of the implant.

10 . The expandable implant device of claim 9 , wherein the leading end of the first endplate includes an aperture in communication with an inner volume of the implant.

11 . The expandable implant device of claim 1 wherein the drive screw extends across the entire length of the expandable implant device from a leading end of the first endplate to a trailing end of the first endplate.

12 . The expandable implant device of claim 1 wherein the drive screw further comprises a second threaded shank.

13 . The expandable implant device of claim 12 wherein the first threaded shank has a right-handed thread pattern and the second threaded shank has a left-handed thread pattern.

14 . The expandable implant device of claim 13 further comprising a second threaded nut coupled to a second linkage and configured to engage at least a portion of the second threaded shank.

15 . The expandable implant device of claim 11 , wherein the drive screw is configured to be actuated at the leading end or at the trailing end of the first endplate.

16 . The expandable implant device of claim 9 wherein the aperture is a threaded aperture, the threaded aperture disposed on a proximal side of the implant device, the threaded aperture configured to receive at least a portion of a screw to secure a plate to the implant device.

17 . The expandable implant device of claim 16 wherein the plate is a fixation plate dimensioned to receive a bone screw.

18 . The expandable implant device of claim 17 , wherein the trailing end of the first endplate is configured to receive the fixation plate in one of a plurality of positions.

19 . The expandable implant device of claim 17 , wherein the screw is a set screw.

20 . An expandable implant device comprising:
an first endplate moveably coupled to a second endplate at a first side of the expandable implant device; and an expansion mechanism disposed on the first endplate at a second side of the expandable implant device; wherein upon actuation of the expansion mechanism, a dimension of the expandable implant device is changed.

Assignees

• Nuvasive Inc

Inventors

• Besaw Christopher
• Sweeney Iii Thomas

Classifications

• A61F2002/30593

  hollow · CPC title

• A61F2002/30507

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

• A61F2/447

  substantially parallelepipedal, e.g. having a rectangular or trapezoidal cross-section · CPC title

• A61F2002/30576

  with extending fixation tabs · CPC title

• A61F2002/30538

  for adjusting angular orientation · CPC title