Systems and methods for expandable corpectomy spacer implantation

Patent metadata

Field	Value
Publication number	US-12485017-B2
Application number	US-202418741898-A
Country	US
Kind code	B2
Filing date	Jun 13, 2024
Priority date	Sep 14, 2016
Publication date	Dec 2, 2025
Grant date	Dec 2, 2025

Abstract

An implant assembly including an expandable vertebral body replacement implant. The implant assembly includes a right hand end and a left hand end configured to attach to a threaded actuator. An outer ring is configured to surround each of the right and left hand ends and the threaded actuator. The implant assembly may include removable endplates configured to engage vertebral bodies as interbody spacer or through a corpectomy. The implant assembly includes a locking mechanism to prevent collapse or movement the implant assembly after implantation. The locking mechanism automatically engage after removal of an inserter instrument from the implant assembly.

First claim

What is claimed is:

1 . An implant assembly for engagement between a first vertebral body and a second vertebral body comprising:
an outer ring; a threaded actuator disposed inside the outer ring and having a gear; a right hand end configured to engage the threaded actuator and configured to receive a first endplate; a left hand end configured to engage the threaded actuator and configured to receive a second endplate; and a locking mechanism disposed in the outer ring with a visible gage to indicate that the locking mechanism is in a locked position or in an unlocked position and configured to removably engage with the gear, wherein the locking mechanism is a single component that is configured to engage with the gear in the locked position and is configured to splay open and disengage with the gear in the unlocked position.

2 . The implant assembly according to claim 1 , wherein rotation of the gear in one direction causes the right hand end and the left hand end to move away from each other.

3 . The implant assembly according to claim 1 , further comprising the first endplate and the second endplate.

4 . The implant assembly according to claim 1 , wherein the outer ring contains a plurality of retaining pins.

5 . The implant assembly according to claim 4 , wherein each of the right hand end and the left hand end contain mating slots configured to receive one of the plurality of retaining pins.

6 . The implant assembly according to claim 1 , wherein the locking mechanism is configured to disengage the gear upon an insertion instrument being received by the outer ring.

7 . The implant assembly according to claim 6 , wherein the locking mechanism engages the gear to lock the assembly after the insertion instrument is removed from the outer ring.

8 . The implant assembly according to claim 7 , wherein the locking mechanism contains one or more teeth configured to engage the gear.

9 . The implant assembly according to claim 1 , further comprising the first endplate and the second endplate and wherein the first endplate and the second endplate are configured to be removably attached to the assembly.

10 . A system for use during a corpectomy procedure to replace all or a portion of a vertebral body, say system comprising:
an implant assembly including: an outer ring; a threaded actuator disposed inside the outer ring and having a gear; a right hand end configured to engage the threaded actuator and configured to receive a first endplate; a left hand end configured to engage the threaded actuator and configured to receive a second endplate; and a locking mechanism disposed in the outer ring with a visible gage to indicate that the locking mechanism is in a locked position or in an unlocked position and configured to removably engage with the gear, wherein the locking mechanism is a single component that is configured to engage with the gear in the locked position and is configured to splay open and disengage with the gear in the unlocked position; and an insertion instrument configured to move the locking mechanism to the unlocked position and engage the gear to expand or contract the implant assembly.

11 . The implant assembly according to claim 10 , wherein rotation of the gear in one direction causes the right hand end and the left hand end to move away from each other.

12 . The implant assembly according to claim 10 , further comprising the first endplate and the second endplate.

13 . The implant assembly according to claim 10 , wherein the outer ring contains a plurality of retaining pins.

14 . The implant assembly according to claim 13 , wherein each of the right hand end and the left hand end contain mating slots configured to receive one of the plurality of retaining pins.

15 . The implant assembly according to claim 10 , wherein the locking mechanism is configured to disengage the gear upon the insertion instrument being received by the outer ring.

16 . The implant assembly according to claim 15 , wherein the locking mechanism engages the gear to lock the assembly after the insertion instrument is removed from the outer ring.

17 . The implant assembly according to claim 16 , wherein the locking mechanism contains one or more teeth configured to engage the gear.

18 . The implant assembly according to claim 10 , further comprising the first endplate and the second endplate and wherein the first endplate and the second endplate are configured to be removably attached to the assembly.

Assignees

• Globus Medical Inc

Inventors

• Mcfarland Dylan
• Bakey Matthew
• Mclaughlin Colm
• Leff David
• Petersheim Samuel
• Howard George

Classifications

• A61F2/446 Primary

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

• A61F2/44

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

• A61F2002/30904

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

• A61F2002/30405

  made by screwing complementary threads machined on the parts themselves · CPC title

• A61F2002/30411

  having two threaded end parts connected by a threaded central part with opposite threads at its opposite ends, i.e. for adjusting the distance between both end parts by rotating the central part · CPC title