Expanding spinal fusion cage

Patent metadata

Field	Value
Publication number	US-11944553-B2
Application number	US-202117144782-A
Country	US
Kind code	B2
Filing date	Jan 8, 2021
Priority date	Jan 8, 2021
Publication date	Apr 2, 2024
Grant date	Apr 2, 2024

Abstract

Disclosed herein are expanding spinal fusion cage embodiments including an expandable cage assembly configured to expand from a collapsed state to an expanded state in an intervertebral space when inflated with a material. The assembly can include an inflatable section defining an interior volume configured to receive the material and expand the interior volume in response to a pressure from the received material to cause the expandable cage assembly to transition from the collapsed state to the expanded state, and a stabilization section configured to restrain the inflatable section during inflation.

First claim

What is claimed is:

1. An intervertebral disc implant, comprising:
an expandable cage assembly configured to expand from a collapsed state to an expanded state in an intervertebral space when inflated with a material, the expandable cage assembly comprising:
an inflatable section defining an interior volume configured to receive the material and expand the interior volume in response to a pressure from the received material to cause the expandable cage assembly to transition from the collapsed state to the expanded state, and
a stabilization section configured to restrain the inflatable section during inflation,
wherein the inflatable section comprises a textile substrate, and
wherein the stabilization section comprises a 3D scaffold that is printed onto the textile substrate and configured to restrict further expansion of the textile substrate in the expanded state.

2. The intervertebral disc implant of claim 1 , wherein the stabilization section at least partially surrounds the inflatable section, the stabilization section sized and shaped to define at least a portion of a periphery of the expandable cage assembly.

3. The intervertebral disc implant of claim 1 , wherein at least one of the inflatable section and the stabilization section comprises a 3D printed material.

4. The intervertebral disc implant of claim 1 , wherein the 3D scaffold comprises a single-piece structure.

5. The intervertebral disc implant of claim 4 , wherein the single-piece structure comprises a 3D printed material.

6. The intervertebral disc implant of claim 1 , wherein at least one of the inflatable section comprises a porous structure configured to allow interaction between the material and the intervertebral space.

7. The intervertebral disc implant of claim 1 , wherein the stabilization section comprises a rigid structure.

8. The intervertebral disc implant of claim 1 , wherein at least one of the inflatable section and the stabilization section comprises a bio re-absorbable material configured to be reabsorbed into the body after a time when fusion has taken place.

9. The intervertebral disc implant of claim 1 , wherein at least one of the inflatable section and the stabilization section comprises embedded organic materials configured to expedite osteointegration.

10. The intervertebral disc implant of claim 9 , wherein the embedded organic materials include at least one of: hyaluronic acids, collagens, proteins, patient cells from bone grafts.

11. The intervertebral disc implant of claim 1 , wherein at least one of the inflatable section and the stabilization section comprises an embedded active pharmaceutical compound.

12. The intervertebral disc implant of claim 1 , wherein the expandable cage assembly is formed from a plurality of materials.

13. The intervertebral disc implant of claim 1 , wherein the inflatable section and the stabilization section are formed from different materials.

14. The intervertebral disc implant of claim 1 , comprising at least one additional structural component attached thereto, wherein the additional structural component is configured to improve fixation in the intervertebral space.

15. The intervertebral disc implant of claim 1 , wherein the 3D scaffold is configured to control a differential expansion rate of the textile substrate during an inflation process of the intervertebral disc implant from the collapsed state to the expanded state.

Assignees

• Depuy Synthes Products Inc
• Stratasys Inc

Inventors

• Hopson Peyton
• Serhan Hassan
• Buehlmann Eric
• Sommerich Robert
• Gamache Thomas
• Star Cynthia
• Reeves Philip
• Smith Oliver
• Hayden David
• Le Merlus Loic

Classifications

• A61F2/4455 Primary

  for the fusion of spinal bodies, e.g. intervertebral fusion of adjacent spinal bodies, e.g. fusion cages (intervertebral discs A61F2/442) · CPC title

• A61F2/30767

  Special external or bone-contacting surface, e.g. coating for improving bone ingrowth · CPC title

• A61F2/3094

  Designing or manufacturing processes · CPC title

• A61F2/441

  made of inflatable pockets or chambers filled with fluid, e.g. with hydrogel · CPC title

• A61F2002/3093

  for promoting ingrowth of bone tissue · CPC title