Expandable inter-body device, system and method

Patent metadata

Field	Value
Publication number	US-11617658-B2
Application number	US-202017123897-A
Country	US
Kind code	B2
Filing date	Dec 16, 2020
Priority date	Nov 5, 2020
Publication date	Apr 4, 2023
Grant date	Apr 4, 2023

Abstract

Expandable spinal implants, systems and methods are disclosed. An expandable spinal implant may include a first endplate, a second endplate, and a moving mechanism that is operably coupled to the first and second endplates. The moving mechanism may include a wedge, a first sliding frame and a second sliding frame disposed on opposite sides of the wedge, a screw guide housing a rotatable first set screw and a rotatable second set screw opposite the first set screw. The first set screw may be operably coupled to the second sliding frame and the second set screw may be operably coupled to the wedge. The moving mechanism may operably adjust a spacing between the first and second endplates upon simultaneous rotation of the first and second set screws and operably adjust an angle of inclination between the first and second endplates upon translating the first set screw or second set screw.

First claim

What is claimed is:

1. An expandable spinal implant deployable between a contracted position and an expanded position, comprising:
a first endplate, the first endplate including: a first outside surface and a first inside surface opposite the first outside surface, a first proximal end and a first distal end opposite the first proximal end, and a first lateral surface and a second lateral surface opposite the first lateral surface, the first and second lateral surfaces extending between the first proximal end and the first distal end;
a second endplate, the second endplate including: a second outside surface and a second inside surface opposite the second outside surface, a second proximal end and a second distal end opposite the second proximal end, and a third lateral surface and a fourth lateral surface opposite the third lateral surface, the third and fourth lateral surfaces extending between the second proximal end and the second distal end;
and
a moving mechanism operably coupled to the first endplate and the second endplate and positioned therebetween, the moving mechanism including:
a wedge, a first sliding frame and a second sliding frame disposed on opposite sides of the wedge, a screw guide housing a rotatable first set screw and a rotatable second set screw opposite the first set screw, the first set screw being operably coupled to the second sliding frame and the second set screw being operably coupled to the wedge, wherein the first set screw and the second set screw are configured to rotate in a first rotation direction and a second rotation direction about a rotation axis projecting in a longitudinal direction of the moving mechanism,
wherein the moving mechanism is configured to operably adjust a spacing between the first and second endplates upon simultaneous rotation of the first and second set screws along the rotation axis, and wherein the moving mechanism is configured to operably adjust an angle of inclination between the first and second endplates upon translating the first set screw or the second set screw along the rotation axis.

2. The expandable spinal implant of claim 1 , wherein the second sliding frame is operably coupled to the first set screw and the second endplate and movable in the longitudinal direction of the moving mechanism by rotation of the first set screw along the rotation axis.

3. The expandable spinal implant of claim 1 , wherein the second sliding frame includes a pair of first protrusions that are operably coupled to corresponding first channels of the first sliding frame, and
wherein upon movement of the second sliding frame in the longitudinal direction the first sliding frame also moves in the longitudinal direction.

4. The expandable spinal implant of claim 1 , wherein the first endplate further includes a first plurality of inclined ramps and the second endplate further includes a second plurality of inclined ramps.

5. The expandable spinal implant of claim 4 , wherein the first plurality of inclined ramps further include a first plurality of grooves and the second plurality of inclined ramps includes a second plurality of grooves.

6. The expandable spinal implant of claim 5 , wherein the first sliding frame further includes first distal contact surfaces and first proximate contact surfaces configured to act against the first plurality of inclined ramps of the first endplate.

7. The expandable spinal implant of claim 6 , wherein the first sliding frame further includes a first plurality of guide walls operably coupled to the first plurality of grooves of the first endplate.

8. The expandable spinal implant of claim 5 , wherein the second sliding frame further includes a second plurality of guide walls operably coupled to the second plurality of grooves of the second endplate.

9. The expandable spinal implant of claim 8 , wherein the second sliding frame further includes a third plurality of ramps.

10. The expandable spinal implant of claim 9 , wherein the wedge further includes a plurality of engagement surfaces configured to operably engage the third plurality of ramps of the second sliding frame.

11. The expandable spinal implant of claim 10 , wherein the wedge further includes a plurality of lateral protrusions.

12. The expandable spinal implant of claim 1 , wherein the first sliding frame further includes a first plurality of channels.

13. The expandable spinal implant of claim 12 , wherein the wedge further includes a second plurality of protrusions operably coupled to the first plurality of channels of the first sliding frame.

14. The expandable spinal implant of claim 1 , wherein the first and second endplates are configured to promote bone growth therebetween.

15. The expandable spinal implant of claim 1 , wherein the first and second endplates each have a footprint configured for at least one surgical technique chosen from: anterior surgical insertion and adjustment techniques, oblique surgical insertion and adjustment techniques, and lateral surgical insertion and adjustment techniques.

16. The expandable spinal implant of claim 1 , wherein at least one of the first endplate and second endplate includes at least one aperture that is configured to receive an anchoring screw therein.

17. The expandable spinal implant of claim 16 , wherein each apertures is further configured to abut an end portion of a vertebrae of a patient and incline a corresponding anchoring screw.

18. A spinal implant system adjustable in situ between vertebral bodies of a patient, the system comprising:
the expandable spinal implant according to claim 1 ; and
a first surgical tool configured to adjust the expandable spinal implant.

19. The spinal implant system of claim 18 , further including a second surgical tool configured to install at least one anchoring screw.

20. An expandable spinal implant, comprising:
a first endplate and a second endplate extending in a longitudinal direction;
a proximal endplate operably coupled to the first endplate and the second endplate, the proximal endplate including at least one aperture configured to engage with a corresponding surgical tool;
a wedge and a sliding frame operably coupled to the wedge, at least one of the wedge and the sliding frame being operably coupled to one of the first and second endplates;
and
a moving mechanism operably coupled to the wedge and the sliding frame, the moving mechanism defining a rotation axis extending in the longitudinal direction,
wherein the moving mechanism is configured to selectively move at least one of the wedge and the sliding frame forward/backward in the longitudinal direction,
wherein upon moving both the wedge and the sliding frame simultaneously forward/backward, the first and second endplates expand/contract with respect to one another, and
wherein the wedge and the sliding frame are further configured to selectively rotate, at least partially, about the rotation axis upon movement of the wedge in the longitudinal direction to thereby adjust an inclination of the first endplate with respect to the second endplate in a lateral direction perpendicular to the longitudinal direction.

Assignees

• Warsaw Orthopedic Inc

Inventors

• Josse Loic
• Peultier Bertrand

Classifications

• A61F2002/30266

  wedge-shaped parallelepipeds · CPC title

• A61F2002/4625

  with relative movement between parts of the instrument during use · CPC title

• A61F2/447 Primary

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

• A61F2002/4627

  with linear motion along or rotating motion about the instrument axis or the implantation direction, e.g. telescopic, along a guiding rod, screwing inside the instrument · CPC title

• A61F2002/30433

  using additional screws, bolts, dowels, rivets or washers e.g. connecting screws · CPC title