Devices and methods for correcting vertebral misalignment

Patent metadata

Field	Value
Publication number	US-9585765-B2
Application number	US-201313767468-A
Country	US
Kind code	B2
Filing date	Feb 14, 2013
Priority date	Feb 14, 2013
Publication date	Mar 7, 2017
Grant date	Mar 7, 2017

Abstract

Embodiments of devices and methods of correcting vertebral misalignment, including, e.g., spondylolisthesis, are disclosed. In one embodiment, a vertebral implant may include an assembly configured to be secured to a first vertebral body, wherein the assembly includes a frame made of a first material and at least one end plate made of a second material different than the first material; a reducing plate configured to be slidably received over the central portion, wherein the reducing plate is configured to be secured to a second vertebral body; and an actuator configured to move the reducing plate relative to the frame.

First claim

We claim:

1. A method of correcting vertebral misalignment, the method comprising:
positioning an implant within a space between two adjacent vertebral bodies, wherein the implant comprises:
a frame assembly include a left lateral portion, a central portion, and a right lateral portion, wherein the left and right lateral portions define enlarged heads configured to receive fasteners therein for securing the frame assembly to a first vertebral body, and wherein the central portion defines a lumen therethrough;
a reducing member configured to be slidably received in the lumen of the central portion, wherein the reducing member includes an anterior portion and a plurality of extensions extending posteriorly therefrom, wherein the plurality of extensions define a channel therebetween, wherein the channel is configured to receive a portion of the central portion; and
an actuator positioned within the reducing member and extending into an actuator receiving portion of the frame assembly, and configured to control a position of the reducing member relative to the frame assembly;
securing the frame assembly to a first vertebral body of the two adjacent vertebral bodies;
securing the reducing member to a second vertebral body of the two adjacent vertebral bodies, wherein the second vertebral body is disposed superiorly of the first vertebral body;
rotating the actuator to move the second vertebral body relative to the first vertebral body; and
securing the reducing member relative to the frame assembly.

2. The method of claim 1 , further comprising one of removing a native disc prior to positioning the implant or roughening a vertebral body surface adjacent the space.

3. The method of claim 1 , wherein the first vertebral body is the LS vertebral body.

4. The method of claim 3 , wherein the second vertebral body is the SI vertebral body.

5. The method of claim 1 , further comprising securing the frame assembly to the space with bone cement.

6. The method of claim 1 , wherein securing the frame assembly to the first vertebral body includes advancing a plurality of threaded fasteners through the frame assembly and into the first vertebral body.

7. The method of claim 6 , wherein the plurality of threaded fasteners are advanced into the first vertebral body in directions towards one another.

8. The method of claim 6 , further comprising activating a fastener restricting mechanism to retain at least one of the plurality of threaded fasteners relative to the frame assembly.

9. The method of claim 1 , wherein securing the reducing member to the second vertebral body includes advancing a plurality of threaded fasteners through the reducing member and into the second vertebral body.

10. The method of claim 9 , further comprising activating a fastener restricting mechanism to retain at least one of the plurality of threaded fasteners relative to the reducing member.

11. The method of claim 9 , wherein the plurality of threaded fasteners are advanced through the reducing member in directions away from one another.

12. The method of claim 10 , wherein securing the reducing member relative to the frame assembly includes preventing rotating of the actuator.

13. The method of claim 12 , wherein the fastener restricting mechanism prevents rotation of the actuator.

14. The method of claim 1 , wherein the frame assembly comprises an anterior end face, wherein the anterior end face is configured to receive a friction ring.

15. The method of claim 1 , wherein the central portion of the frame comprises a longitudinal member with the lumen formed therethrough.

16. The method of claim 15 , wherein the lumen extends across the entire length of the longitudinal member.

17. The method of claim 15 , wherein the lumen extends across only a partial length of the longitudinal member.

18. The method of claim 15 , wherein the longitudinal member includes one or more flanges extending laterally away therefrom.

19. The method of claim 1 , wherein the reducing member comprises an anterior head portion.

Assignees

• Globus Medical Inc
• Globus Medical Inc

Inventors

• Niemiec Marcin
• Padovani Nick
• Hansell Matthew
• Sibson Duncan
• Friedrich Adam
• Pham Khiem
• Hansell Noah
• Silber Ben
• Iott Andrew

Classifications

• A61F2002/30487

  Circumferential cooperating grooves and beads on cooperating lateral surfaces of a mainly longitudinal connection · CPC title

• A61F2002/30593

  hollow · CPC title

• A61F2002/30787

  inclined obliquely with respect to each other · CPC title

• A61F2002/30677

  Means for introducing or releasing pharmaceutical products, e.g. antibiotics, into the body · CPC title

• A61F2/441

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