Systems and methods for expandable corpectomy spacer implantation

Patent metadata

Field	Value
Publication number	US-11998455-B2
Application number	US-202318151541-A
Country	US
Kind code	B2
Filing date	Jan 9, 2023
Priority date	Sep 14, 2016
Publication date	Jun 4, 2024
Grant date	Jun 4, 2024

Abstract

An implant assembly including an expandable vertebral body replacement implant. Two outer cores disposed on opposing ends of an inner are configured to move away from each other when the inner core is actuated. The implant assembly may include removable endplate configured to engage vertebral bodies as interbody spacer or through a corpectomy. The implant may include a locking mechanism to prevent collapse or movement the implant assembly after implantation. The locking mechanism may be automatically engage after removal of an inserter instrument from the implant assembly.

First claim

What is claimed is:

1. A method for stabilizing spinal elements comprising the steps of:
providing an implant assembly for engagement between a first vertebral body and a second vertebral body comprising:
an inner core extending between a first end and a second end;
a first outer core disposed on the first end; and
a second outer core disposed on the second end,
wherein the inner core is configured to be actuated in a first direction to move the first outer core and second outer core to an expanded configuration and wherein the inner core is configured to be actuated in a second direction to move the first outer core and the second outer core to a collapsed configuration;

wherein the first outer core and the second outer core contain one or more mating rails to prevent rotation of the first outer core and the second outer core during expansion; and
positioning the implant assembly between the first vertebral body and the second vertebral body.

2. The method according to claim 1 , wherein the first outer core is configured to engage the first vertebral body and the second outer core is configured to engage the second vertebral body.

3. The method according to claim 1 , wherein the inner core includes left handed threading on the first end and right handed threading on the second end.

4. The method according to claim 1 , wherein the inner core contains central holes configured to be engaged by an inserter instrument.

5. The method according to claim 1 , wherein the first outer core and the second outer core contain one or more protrusions configured to engage one of the first vertebral body and the second vertebral body.

6. The method according to claim 1 , wherein the first outer core and the second outer core are configured to receive a removable end plate.

7. The method according to claim 6 , wherein the removable endplate contains a relief to engage a counter relief on one of the first outer core and the second outer core.

8. The method according to claim 1 , further comprising a locking mechanism configured to lock the first outer core and the second outer core relative to the inner core.

9. The method according to claim 8 , wherein the locking mechanism is configured to automatically lock the first outer core and the second outer core relative to the inner core via a spring mechanism.

10. A method for stabilizing spinal elements comprising the steps of:
providing an implant assembly for engagement between a first vertebral body and a second vertebral body comprising:
an inner core extending between a first end and a second end;
a first outer core disposed on the first end;
a second outer core disposed on the second end;
a first endplate configured to removably attach to the first outer core;
a second endplate configured to removably attach to the second outer core;
wherein the inner core is configured to be actuated in a first direction to move the first outer core and second outer core to an expanded configuration and wherein the inner core is configured to be actuated in a second direction to move the first outer core and the second outer core to a collapsed configuration;
wherein the first outer core and the second outer core contain one or more mating rails to prevent rotation of the first outer core and the second outer core during expansion; and

positioning the implant assembly between the first vertebral body and the second vertebral body.

11. The method according to claim 10 , wherein the first endplate is configured to engage the first vertebral body and the second endplate is configured to engage the second vertebral body.

12. The method according to claim 10 , wherein the inner core includes left handed threading on the first end and right handed threading on the second end.

13. The method according to claim 10 , wherein the inner core contains central holes configured to be engaged by an inserter instrument.

14. The method according to claim 10 , wherein the first endplate and the second endplate contain one or more protrusions configured to engage one of the first vertebral body and the second vertebral body.

15. The method according to claim 10 , wherein the first outer core and the second outer core contain undercuts configured to engage one of the first endplate and the second endplate.

16. The method according to claim 10 , wherein the first endplate and the second endplate contains a relief to engage a counter relief on one of the first outer core and the second outer core.

17. The method according to claim 10 , further comprising a locking mechanism configured to lock the first outer core and the second outer core relative to the inner core.

18. The method according to claim 17 , wherein the locking mechanism is configured to automatically lock the first outer core and the second outer core relative to the inner core via a spring mechanism.

Assignees

• Globus Medical Inc

Inventors

• Howard George

Classifications

• A61F2/4465 Primary

  having a circular or kidney shaped cross-section substantially perpendicular to the axis of the spine · CPC title

• A61F2/44

  for the spine, e.g. vertebrae, spinal discs · CPC title

• A61F2/446

  having a circular or elliptical cross-section substantially parallel to the axis of the spine, e.g. cylinders or frustocones · CPC title

• A61F2002/448

  comprising multiple adjacent spinal implants within the same intervertebral space or within the same vertebra, e.g. comprising two adjacent spinal implants · CPC title

• A61F2002/4495

  having a fabric structure, e.g. made from wires or fibres · CPC title