Method, system and apparatus for interbody fusion

• US 20070276377A1
• Filed: 01/16/2007
• Published: 11/29/2007
• Est. Priority Date: 01/09/2004
• Status: Active Grant

• Current Assignee: Kent Yundt
• Original Assignee: Kent Yundt
• Inventors: Yundt, Kent
• Granted Patent: US 7,670,359 B2
• Time in Patent Office: Days
• US Class Current: 606/279
• CPC Class Codes: A61B 17/1671 for the spine
• CPC Class Codes: A61B 17/7098 wherein the implant is permeable or has openings, e.g. fenestrated screw hollow surgical screws A61B17/864
• CPC Class Codes: A61B 2017/0256 for the spine
• CPC Class Codes: A61F 2/441 made of inflatable pockets or chambers filled with fluid, e.g. with hydrogel
• CPC Class Codes: A61F 2/4455 for the fusion of spinal bodies, e.g. intervertebral fusion of adjacent spinal bodies, e.g. fusion cages intervertebral discs A61F2/442
• CPC Class Codes: A61F 2/4611 of spinal prostheses
• CPC Class Codes: A61F 2002/2817 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 Class Codes: A61F 2002/2835 Bone graft implants for filling a bony defect or an endoprosthesis cavity, e.g. by synthetic material or biological material
• CPC Class Codes: A61F 2002/30062 (bio)absorbable, biodegradable, bioerodable, (bio)resorbable, resorptive
• CPC Class Codes: A61F 2002/30583 filled with hardenable fluid, e.g. curable in-situ
• CPC Class Codes: A61F 2002/30593 hollow
• CPC Class Codes: A61F 2002/30785 parallel
• CPC Class Codes: A61F 2002/30892 parallel
• CPC Class Codes: A61F 2002/4627 with linear motion along or rotating motion about the instrument axis or the implantation direction, e.g. telescopic, along a guiding rod, screwing inside the instrument
• CPC Class Codes: A61F 2002/4631 the prosthesis being specially adapted for being cemented
• CPC Class Codes: A61F 2210/0004 bioabsorbable
• CPC Class Codes: A61F 2210/0085 hardenable in situ, e.g. epoxy resins
• CPC Class Codes: A61F 2310/00023 Titanium or titanium-based alloys, e.g. Ti-Ni alloys

Abstract

Methods, systems and apparatus are provided for interbody fusion. In some embodiments, a device is provided for fusing vertebral bodies. The device includes a shell configured to be disposed between a first body and a second body, an injection opening to receive fusing material, and a delivery hole configured to enable fusing material to flow into at least one of the first body and the second body.

Claims

1. A device for fusing vertebral bodies, the device comprising:

a shell configured to be disposed between a first body and a second body;

an injection opening to receive fusing material; and

a delivery hole configured to enable fusing material to flow into at least one of the first body and the second body.

2. The device of claim 1, further comprising a distribution channel extending from the injection opening to the delivery hole.

3. The device of claim 2, wherein the distribution channel includes a drilling spring.

4. The device of claim 3, wherein the fusing material is configured to harden along the drilling spring.

5. The device of claim 1, configured for insertion by a delivery device.

6. The device of claim 1, wherein the shell is expandable.

7. The device of claim 1, wherein the shell includes a cavity configured to be filled with fusing material.

8. The device of claim 1, wherein the drilling spring operates as a reinforcement structure.

9. The device of claim 1, further comprising a first delivery hole on a first surface adjacent the first body and a second delivery hole on a second surface adjacent the second body such that the fusing material flows from the first delivery hole into the first body and from the second delivery hole into the second body to form a bridge.

10. The device of claim 1, wherein the delivery hole is configured to enable drilling into an adjacent body.

11. The device of claim 1, wherein the fusing material is a rapidly-hardening material.

12. The device of claim 1, wherein the fusing material is a bioadhesive material.

13. A material restrictor for use in interbody fusion of two adjacent vertebral bodies, the material restrictor comprising:

a shell defining a cavity;

an injection opening within the shell to the cavity, wherein the injection opening is configured to receive fusing material into the cavity; and

at least one delivery surface configured to enable access to one of the adjacent vertebral bodies.

14. The material restrictor of claim 13, wherein the delivery surface includes at least one preformed delivery hole.

15. The material restrictor of claim 13, wherein the delivery surface is configured to be drilled to form a delivery hole.

16. The material restrictor of claim 13, further comprising alignment features configured to cooperate with a delivery device to guide the material restrictor into a disc space.

17. The material restrictor of claim 13, further comprising positioning features configured to cooperate with a delivery device to provide feedback to a user when the material restrictor is disposed in a predetermined position.

18. The material restrictor of claim 13, wherein the shell is configured with a width of about 7 mm.

19. The material restrictor of claim 13, wherein the shell is configured with a height ranging from about 8 mm to about 14 mm.

20. The material restrictor of claim 13, wherein the shell is configured with a length ranging from about 20 mm to about 26 mm.

21. The material restrictor of claim 13, wherein the shell is at least partially composed of titanium.

22. The material restrictor of claim 13, wherein the shell is at least partially composed of biodegradable material

23. The material restrictor of claim 13, further comprising two delivery surfaces, a top surface and a bottom surface.

24. The material restrictor of claim 14 further comprising distribution channels within the shell.

25. A system of fusing vertebral bodies, the system comprising:

a material restrictor having an injection opening and delivery holes configured to be positioned within a collapsed disc space between a first and second vertebral body;

an delivery cannula configured to be operatively coupled with the injection opening of the material restrictor; and

fusing material configured to be delivered to the material restrictor via the delivery cannula, wherein the fusing material is configured to spread from the material restrictor into the first and second vertebral bodies via the delivery holes.

26. The system of claim 25, wherein the fusing material is configured to substantially harden in approximately less than 15 minutes after being injected into the material restrictor.

27. The fusing material of claim 25, wherein the fusing material comprises a biological cement

28. The fusing material of claim 25, wherein the fusing material comprises a bone substitute material.

29. The system of claim 25, further comprising a delivery device coupled to the material restrictor and configured to enable access to the material restrictor.