SYSTEMS AND METHODS FOR STABILIZATION OF BONE STRUCTURES, INCLUDING THOROCOLUMBAR STABILIZATION SYSTEMS AND METHODS

• US 20110166610A1
• Filed: 08/09/2010
• Published: 07/07/2011
• Est. Priority Date: 08/07/2009
• Status: Abandoned Application

• Current Assignee: Exactech, Inc.
• Original Assignee: Exactech, Inc.
• Inventors: Altarac, Moti, Hayes, Stanley Kyle, Reglos, Joey Camia
• Application Number:
  US12/853,260
• Publication Number:
  US 20110166610A1
• Time in Patent Office: Days
• US Class Current: 606/86.A
• CPC Class Codes: A61B 17/708 with tubular extensions coaxially mounted on the bone anchors
• CPC Class Codes: A61B 17/7083 Tools for guidance or insertion of tethers, rod-to-anchor connectors, rod-to-rod connectors, or longitudinal elements
• CPC Class Codes: A61B 17/7091 for applying, tightening or removing longitudinal element-to-bone anchor locking elements, e.g. caps, set screws, nuts or wedges
• CPC Class Codes: A61B 2090/061 for measuring dimensions, e.g. length

Abstract

Methods, systems, devices and tools for placing bone stabilization components in a patient are provided. The systems and devices have a reduced number of discrete components that allow placement through small incisions and tubes. More particularly, the present invention is directed to systems and methods of treating the spine, which eliminate pain and enable spinal motion. Methods are also provided for stabilizing the thorocolumbar spine region and for implanting the disclosed systems.

Claims

1. A system for implanting a spinal stabilization apparatus in a patient, comprising:

a first pedicle access device comprising an elongated tube with a proximal end and a distal end, the proximal end comprising a first engagement means for attachment to a first implantation tool and a second implantation tool;

a second pedicle access device comprising an elongated tube with a proximal end and a distal end, the proximal end comprising a second engagement means for attachment to the first implantation tool;

wherein the spinal stabilization apparatus comprises a first pedicle screw assembly, a second pedicle screw assembly, and a rod configured to be attached between the first pedicle screw assembly and the second pedicle screw assembly; and

at least one of a cap inserter configured for controlled rod reduction and securement.

2. The system of claim 1, wherein the first pedicle access device is configured to be inserted through a minimally invasive procedure.

3. The system of claim 1, wherein the first implantation tool is a rod introducer tool configured to insert the spinal stabilization apparatus rod into the first pedicle screw assembly and the first or second pedicle access device slidingly receives the rod introducer device.

4. The system of claim 3 wherein the rod introducer tool engages the spinal stabilization apparatus rod.

5. The system of claim 3, wherein the rod introducer tool frictionally or magnetically engages the spinal stabilization apparatus rod.

6. The system of claim 3, wherein the first or second pedicle access device slidingly receives the rod introducer tool through a mechanical key configured to rotationally orient the rod introducer tool.

7. The system of claim 3, wherein the rod introducer tool is configured to deliver a rod longer than 60 mm.

8. The system of claim 1, further comprising a third pedicle screw assembly.

9. The system of claim 1, further comprising a third pedicle screw assembly, wherein the first, second and third pedicle screw assemblies are attached with an alignment guide spanner.

11. The system of claim 1, wherein the cap inserter includes prongs at a distal end and an engagement mechanism at a proximal end, wherein the engagement mechanism has a first engaged position and a second released position such that the prongs are locked onto the associated pedicle screw assembly when the engagement mechanism is in a first engaged position.

12. The system of claim 11, wherein the prongs are retractable.

13. The system of claim 11, wherein each pedicle screw assembly has an associated cap inserter.

14. The system of claim 1, wherein the cap inserter further comprises a first adjustment device and a second adjustment device, wherein the first and the second adjustment devices are independently adjustable.

15. The system of claim 14, wherein the first adjustment device has an engaged position and a disengaged position.

16. The system of claim 14, wherein the second adjustment device is rotationally engaged.

10. The system of wherein the first implantation tool is a rod introducer tool configured to insert the spinal stabilization apparatus rod into the first pedicle screw assembly and the first or second pedicle access device slidingly receives the rod introducer device, and wherein the rod inserter includes a handle having a release mechanism, the release mechanism having a first position and a second released position, wherein the rod is retained when the release mechanism is in a first position and the rod slideably releases when the release mechanism is in the second position.

17. A method of treating the thorocolumber spine region, comprising:

implanting a first bone anchor assembly in a first vertebrae;

implanting a second bone anchor assembly in second vertebrae;

providing a first access device comprising an elongate tube with a proximal end and a distal end;

inserting the first access device through a first incision;

connecting the distal end of the first access device to the first bone anchor assembly;

providing a second access device comprising an elongated tube with a proximal end and a distal end;

inserting the second access device through a second incision;

connecting the distal end of the second access device to the second bone anchor assembly;

aligning the first bone anchor assembly and the second bone anchor assembly;

inserting a connecting rod into the first access device at the proximal end;

tunneling through tissue by moving the connecting rod inside the first access device from the proximal end to the distal end of the first access device;

aligning the connecting rod with the first and second bone anchor assemblies;

engaging cap inserters configured for controlled rod reduction to connect the connecting rod to the first and second bone anchor assemblies;

disconnecting the first and second access devices from the first and second bone anchor assemblies; and

removing the first and second access devices.

18. The method of claim 17, wherein the first and second incision are the same incision.

19. The method of claim 17, wherein the cap inserters are sequentially engaged to reduce the rod into place.

20. The method of claim 17, further comprising locking the cap inserters to the bone anchor assemblies with a locking device and then sequentially tightening the cap inserters with an adjustment device to reduce the rod into place.