Expandable interbody

Patent metadata

Field	Value
Publication number	US-12544237-B2
Application number	US-202217578899-A
Country	US
Kind code	B2
Filing date	Jan 19, 2022
Priority date	Sep 29, 2017
Publication date	Feb 10, 2026
Grant date	Feb 10, 2026

Abstract

An expandable interbody device used as a prosthesis during spinal surgery. The expandable interbody device is configured to be inserted into the space between spinal disks to provide stability. The expandable interbody device includes a drive block, a linkage block, a drive screw, a first endplate, a second endplate, and at least two linkages. Rotation of the drive screw causes movement of the linkage block relative to the drive block and/or movement of the first endplate relative to the second endplate.

First claim

What is claimed:

1 . An expandable interbody device; said expandable interbody device comprising:
a drive block; said drive block at least partially includes a drive block opening; a linkage block; said linkage block at least partially includes a linkage block opening; a block engagement arrangement; a drive screw rotatably coupled within one of said drive block opening or said linkage block opening and threadingly disposed within the other of said linkage block opening or said drive block opening; a first endplate and a second endplate; said first endplate includes a first endplate engagement arrangement; said second endplate includes a second endplate engagement arrangement; said first and second endplate engagement arrangements mechanically and slidably engaged to said block engagement arrangement; and, a first linkage arrangement; said first linkage arrangement includes first and second linkages; said first linkage couples said linkage block to said first endplate; said second linkage couples said linkage block to said second endplate; wherein said drive block, said first endplate and said second endplate each define a respective graft window, wherein said respective graft windows of said drive block, said first endplate and said second endplate are aligned with each other; wherein rotation of said drive screw simultaneously causes one or more of I) movement of said linkage block relative to said drive block, II) movement of said first endplate relative to said second endplate, and III) said first and/or second endplate engagement arrangements sliding relative to said block engagement arrangement; and wherein said engagement of said first and/or second endplate engagement arrangements with said block engagement arrangement at least partially guides movement of said first endplate and/or said second endplate relative to at least one of said drive block or linkage block during rotation of said drive screw.

2 . An expandable interbody device; said expandable interbody device comprising:
a drive block; said drive block includes a drive block opening; a linkage block; said linkage block includes a linkage block opening; a block engagement arrangement; a drive screw that is at least partially positioned within said drive block opening and at least partially position in said linkage block opening; a first endplate and a second endplate; said first endplate includes a first endplate engagement arrangement; said second endplate includes a second endplate engagement arrangement; said first and second endplate engagement arrangements are configured to engage with said block engagement arrangement; and, a first linkage arrangement; said first linkage arrangement includes first and second linkages; said first linkage rotatably engages said linkage block and rotatably engages said first endplate; said second linkage rotatably engages said linkage block and rotatably engages said second endplate; a second linkage arrangement; said second linkage arrangement is positioned on an opposite side of said expandable interbody device from said first linkage arrangement; said second linkage arrangement includes first and second linkages; said first linkage of said second linkage arrangement is rotatably coupled to said linkage block and engages said first endplate; said second linkage of said second linkage arrangement is rotatably coupled to said linkage block and engages said second endplate; wherein rotation of said drive screw causes one or more of I) movement of at least one of said linkage block and said drive block, II) movement of at least one of said first endplate and said second endplate, and III) said first and/or second endplate engagement arrangements moving relative to at least one of said linkage block and said drive block; and wherein said engagement of said block engagement arrangement with said first endplate engagement and said second endplate engagement is configured to at least partially guide movement of said first and/or second endplates relative to said drive block and/or said linkage block during rotation of said drive screw; and wherein each of said drive block, said first endplate and said second endplate includes a graft window; said graft window of said drive block, said first endplate and said second endplate at least partially aligned with one another when said expandable interbody device is in said closed position.

3 . The expandable interbody device as defined in claim 2 , wherein said block engagement arrangement is at least partially positioned on said drive block.

4 . The expandable interbody device as defined in claim 3 , wherein said block engagement arrangement includes at least one of a slot, protrusion, rib, rail, or groove; said first endplate engagement arrangement includes at least one of a slot, protrusion, rib, rail, or groove; said second endplate engagement arrangement includes at least one of a slot, protrusion, rib, rail, or groove; said block engagement arrangement and said first endplate engagement arrangement interact with one another to control movement of said first endplate relative to said drive block; said block engagement arrangement and said second endplate engagement arrangement interact with one another to control movement of said second endplate relative to said drive block; said block engagement arrangement is located on said drive block.

5 . The expandable interbody device as defined in claim 4 , wherein said block engagement arrangement is configured to slidably engage with said first endplate engagement arrangement as said first end plate moves relative to said block engagement arrangement; said block engagement arrangement is configured to slidably engage with said second endplate engagement arrangement as said second end plate moves relative to said block engagement arrangement.

6 . The expandable interbody device as defined in claim 5 , wherein said drive screw is rotatably coupled within said drive block opening; said drive screw is not threadedly coupled to said drive block; said drive screw is threadedly coupled within said linkage block opening.

7 . The expandable interbody device as defined in claim 6 , wherein said first endplate engagement arrangement includes alpha and beta first endplate engagement members; said block engagement arrangement includes alpha and beta first block engagement members; said alpha first endplate engagement member is slidably engagable with said alpha first block engagement member; said beta first endplate engagement member is slidably engagable with said beta first block engagement member.

8 . The expandable interbody device as defined in claim 7 , wherein said second endplate engagement arrangement includes alpha and beta second endplate engagement members; said block engagement arrangement includes alpha and beta second block engagement members; said alpha second endplate engagement member is slidably engagable with said alpha second block engagement member; said beta second endplate engagement member is slidably engagable with said beta second block engagement member.

9 . The expandable interbody device as defined in claim 8 , wherein said first endplate and said second endplate each include first and second ends; said first end of said first endplate and said second endplate are each positioned at one end of said expandable interbody device and said second end of said first endplate and said second endplate are each positioned at an opposite end of said expandable interbody device; said first end of said first endplate and said second endplate change in spacing from one another as said expandable interbody device moved between an open and closed position; said second end of said first endplate and said second endplate change

Assignees

• Mirus Llc

Inventors

• Yadav Jay
• Gray Wayne
• Roth Noah

Classifications

• A61F2002/443

  having two transversal endplates and at least one intermediate component · CPC title

• A61F2002/30471

  connected by a hinged linkage mechanism, e.g. of the single-bar or multi-bar linkage type · CPC title

• A61F2002/30507

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

• A61F2/4425

  made of articulated components · CPC title

• A61F2002/30556

  for adjusting thickness · CPC title