Spinous process fusion devices and methods thereof

Patent metadata

Field	Value
Publication number	US-9681898-B2
Application number	US-201414499301-A
Country	US
Kind code	B2
Filing date	Sep 29, 2014
Priority date	Dec 13, 2010
Publication date	Jun 20, 2017
Grant date	Jun 20, 2017

Abstract

Devices and methods for positioning and immobilizing at least two adjacent vertebrae using adjacent spinous processes. The method includes positioning a spinous process fusion device in an interspinous space between adjacent spinous processes including a rod and a first wing, and attaching a second wing to the rod, for example, using a ratcheting mechanism.

First claim

What is claimed is:

1. A method for positioning an implantable device comprising the steps of:
distracting adjacent spinous processes from one another creating an interspinous space between the adjacent spinous processes;
attaching a spinous process fusion device to an insertion instrument, the spinous process fusion device comprising, a rod having protuberances arranged along a longitudinal axis of the rod, and a first wing coupled to a first portion of the rod;
positioning the spinous process fusion device in the interspinous space;
actuating the rod to be in a first position;
attaching a second wing to a wing insertion instrument, the second wing having an opening and ratchet members configured to couple to a second portion of the rod;
placing the rod through the opening of the second wing thereby engaging the ratchet members with the protuberances on the longitudinal axis of the rod;
applying pressure upon the second wing to attach the second wing to the spinous process by engaging teeth provided on the second wing with the spinous process; and
removing the wing insertion instrument and the insertion instrument,
wherein the method further comprises distracting the adjacent spinous processes using a central barrel attached to the rod.

2. The method of claim 1 , wherein the first wing comprises teeth that contact the spinous processes of the vertebrae.

3. The method of claim 1 , wherein the method further comprises actuating the rod from the first position to a second position for removal of the second wing.

4. The method of claim 1 , wherein the method further comprises applying bone graft material in the interspinous space.

5. The method of claim 1 , wherein the spinous process fusion device includes a central barrel having a first side and a second side, which extend on either side of the rod.

6. The method of claim 5 , wherein the first side of the barrel includes at least one insertion instrument connecting portion and the second side of the barrel includes at least one insertion instrument connecting portion.

7. The method of claim 5 , wherein the method further comprises positioning the central barrel in the interspinous space.

8. The method of claim 1 , wherein at least one of the first and second wings have a length sufficient to span between the adjacent spinous processes.

9. The method of claim 1 , wherein the spinous process fusion device immobilizes a lumbar motion segment associated with respective vertebrae of the engaged spinous processes.

10. A method for positioning an implantable device comprising:
positioning a spinous process fusion device in an interspinous space between adjacent spinous processes, the spinous process fusion device comprising a rod having protuberances arranged along a longitudinal axis of the rod and a first wing coupled to a first portion of the rod;
and attaching a second wing to a second portion of the rod, the second wing having an opening and ratchet members configured to couple to the second portion of the rod, by placing the rod through the opening of the second wing thereby engaging the ratchet members with the protuberances on the longitudinal axis of the rod, and applying pressure to the second wing to attach the second wing to the spinous processes by engaging teeth provided on the second wing with the spinous processes,
wherein the spinous process fusion device includes a central barrel coupled to the rod.

11. The method of claim 10 , wherein the method further comprises applying bone graft material within the spinous process fusion device.

12. The method of claim 10 , wherein the spinous process fusion device may be positioned in the interspinous space without removal of the supraspinous ligament.

13. The method of claim 10 , wherein the barrel is a central barrel having a first side and a second side, which extend on either side of the rod.

14. A method for immobilizing a motion segment of the spine comprising:
positioning a spinous process fusion device in an interspinous space between adjacent spinous processes, the spinous process fusion device comprising a rod having protuberances arranged along a longitudinal axis of the rod, a first wing coupled to a first portion of the rod, and a barrel coupled to the rod; and
positioning the rod through an opening in a second wing and applying pressure to the second wing to attach the second wing to a second portion of the rod, wherein the second wing has ratchet members configured to engage with the protuberances on the longitudinal axis of the rod.

15. The method of claim 14 , wherein the ratchet members and protuberances provide a one-way ratcheting lock to lock the second wing to the rod.

16. The method of claim 14 , wherein the first wing includes a plurality of teeth configured to engage the adjacent spinous process above and below the interspinous space.

17. The method of claim 14 , wherein the second wing includes a plurality of teeth configured to engage the adjacent spinous process above and below the interspinous space.

18. The method of claim 14 , wherein the barrel is positioned in the interspinous space to distract the spinous processes.

19. The method of claim 14 , wherein the barrel is a central barrel having a first side and a second side, which extend on either side of the rod.

Assignees

• Globus Medical Inc

Inventors

• Zappacosta Jason
• Laskowitz Daniel
• Duffield William E
• Cianfrani Jason
• Seifert Jody L
• Clutter Darren

Classifications

• A61B17/7068 Primary

  Devices comprising separate rigid parts, assembled in situ, to bear on each side of spinous processes; Tools therefor · CPC title

• A61B2017/0256

  for the spine · CPC title

• A61B2017/564

  Methods for bone or joint treatment · CPC title

• A61B17/7067

  Devices bearing against one or more spinous processes and also attached to another part of the spine; Tools therefor · CPC title