Methods and apparatus for performing spine surgery

Patent metadata

Field	Value
Publication number	US-9757246-B1
Application number	US-201514918137-A
Country	US
Kind code	B1
Filing date	Oct 20, 2015
Priority date	Apr 16, 2009
Publication date	Sep 12, 2017
Grant date	Sep 12, 2017

Abstract

Systems and methods are described for correcting sagittal imbalance in a spine including instruments for performing the controlled release of the anterior longitudinal ligament through a lateral access corridor and hyper-lordotic lateral implants.

First claim

What is claimed is:

1. A system comprising:
a resector including
a sliding blade having a handle, a hollow shaft defining a central lumen, a head defining a first opening in communication with the central lumen, and a second opening in communication with the central lumen and opposingly positioned from the first opening;

an implant positionable within an interbody space defined by a first vertebra and a second vertebra, the implant including
an upper surface to contact the first vertebra when the implant is positioned within the interbody space, a lower surface to contact the second vertebra when the implant is positioned within the interbody space, a distal wall, a proximal wall, an anterior sidewall that faces anteriorly when the implant is positioned within the interbody space, and a posterior sidewall that faces posteriorly when the implant is positioned within the interbody space;
at least a first fusion aperture extending through the upper surface and lower surface and configured to permit bone growth between the first vertebra and the second vertebra when the implant is positioned within the interbody space; and
a tab including at least one fixation aperture therethrough configured to receive a fixation anchor, and a locking mechanism configured to prevent disengagement of a fixation anchor from the fixation aperture.

2. The system of claim 1 , wherein the implant has a maximum longitudinal length extending from a proximal end of the proximal wall to a distal end of the distal wall, a width extending from the anterior end of the anterior sidewall to the posterior end of the posterior sidewall, the maximum longitudinal length being at least 40 mm, an anterior height extending from the upper surface to the lower surface at the anterior sidewall and a posterior height extending from the upper surface to the lower surface at the posterior sidewall, the anterior height being greater than the posterior height such that the upper and lower surfaces increase in slope from the posterior sidewall to the anterior sidewall forming an angle greater than 20 degrees.

3. The system of claim 1 , further comprising a second fusion aperture extending through the upper surface and the lower surface and configured to permit bone growth between the first vertebra and the second vertebra when the implant is positioned within the interbody space.

4. The system of claim 3 , wherein the second fusion aperture has a longitudinal aperture length extending generally parallel to a longitudinal length of the implant, and an aperture width extending from the anterior sidewall to the posterior sidewall, wherein the longitudinal aperture length is greater than the aperture width.

5. The system of claim 1 , wherein the implant includes anti-migration elements on the upper surface.

6. The system of claim 5 , wherein the anti-migration elements comprise a plurality of ridges extending perpendicularly to a longitudinal length of the implant.

7. The system of claim 5 , wherein the anti-migration elements comprise a plurality of spike elements.

8. The system of claim 1 , further comprising an osteoinductive material positioned within the first fusion aperture.

9. The system of claim 1 , wherein the tab extends above the upper surface and is configured to engage an exterior surface of the first vertebra when the implant is positioned within the interbody space.

10. The system of claim 9 , wherein the tab extends below the lower surface and is configured to engage an exterior surface of the second vertebra when the implant is positioned within the interbody space.

11. The system of claim 1 , wherein the tab includes at least two fixation apertures.

12. The system of claim 1 , wherein the fixation anchor is a screw.

13. The system of claim 1 , further comprising a tissue retractor configured to travel through the central lumen to create an operative corridor.

14. The system of claim 13 , further comprising at least one dilator configured to movably slide with the tissue retractor from a first configuration to a second configuration, wherein the movement to the second configuration enlarges the operative corridor.

15. The system of claim 13 , wherein the tissue retractor comprises a barrier.

16. The system of claim 1 , further comprising a stimulation electrode configured to deliver an electrical stimulation signal for nerve monitoring.

17. The system of claim 1 , wherein the upper surface and the lower surface are each a planar surface.

18. The system of claim 1 , wherein the upper surface and the lower surface are each a convex surface.

19. The system of claim 1 , further comprising a tissue retractor including a barrier.

20. The system of claim 1 , wherein the distal wall, the proximal wall, the anterior sidewall, and the posterior sidewall each comprise radiolucent material.

21. The system of claim 20 , wherein the radiolucent material is PEEK.

Assignees

• Nuvasive Inc

Inventors

• Pimenta Luiz
• Morris Andrew
• Snider Brian
• Serra Michael

Classifications

• A61F2002/30593

  hollow · CPC title

• A61F2002/30774

  internally-threaded · CPC title

• A61F2/442 Primary

  Intervertebral or spinal discs, e.g. resilient (non-disc-shaped intervertebral inflatable pockets A61F2/441; non-disc-shaped intervertebral fusion implants A61F2/4455) · CPC title

• A61F2/447

  substantially parallelepipedal, e.g. having a rectangular or trapezoidal cross-section · CPC title

• A61F2002/2817

  Bone stimulation by chemical reactions or by osteogenic or biological products for enhancing ossification, e.g. by bone morphogenetic or morphogenic proteins [BMP] or by transforming growth factors [TGF] · CPC title