Intervertebral implants and methods of use

• US 20070270963A1
• Filed: 04/27/2006
• Published: 11/22/2007
• Est. Priority Date: 04/27/2006
• Status: Abandoned Application

• Current Assignee: Warsaw Orthopedic Incorporated (Medtronic Plc)
• Original Assignee: SDGI Holdings Incorporated (Medtronic Plc)
• Inventors: Melkent, Anthony, Edie, Jason, Waugh, Lindsey
• Application Number:
  US11/412,330
• Publication Number:
  US 20070270963A1
• Time in Patent Office: Days
• US Class Current: 623/17.110
• CPC Class Codes: A61F 2/30771 applied in original prostheses, e.g. holes or grooves
• CPC Class Codes: A61F 2/442 Intervertebral or spinal discs, e.g. resilient non-disc-shaped intervertebral inflatable pockets A61F2/441; non-disc-shaped intervertebral fusion implants A61F2/4455
• 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 2002/30133 kidney-shaped or bean-shaped
• CPC Class Codes: A61F 2002/30187 D-shaped or half-disc-shaped
• CPC Class Codes: A61F 2002/30593 hollow
• CPC Class Codes: A61F 2002/30774 internally-threaded
• CPC Class Codes: A61F 2002/30785 parallel
• CPC Class Codes: A61F 2002/30841 Sharp anchoring protrusions for impaction into the bone, e.g. sharp pins, spikes
• CPC Class Codes: A61F 2002/30904 serrated profile, i.e. saw-toothed
• CPC Class Codes: A61F 2230/0015 Kidney-shaped, e.g. bean-shaped
• CPC Class Codes: A61F 2230/0034 D-shaped
• CPC Class Codes: A61F 2310/00365 Proteins; Polypeptides; Degradation products thereof

Abstract

The present application discloses intervertebral implants and methods of using the implants. The implants may include inferior and superior surfaces, and a sidewall that together form the body of the implant. One or both of the inferior and superior surfaces may include tapered surfaces to facilitate distraction of adjacent vertebral members. The multiple tapered sections allows insertion via multiple surgical approaches using a single implant thereby negating the need to employ a plurality of approach-specific implants as is conventional.

Claims

1. A vertebral implant sized to fit within an intervertebral space between vertebral members, the implant comprising:

a body including superior and inferior surfaces and a sidewall;

a contact section positioned on one of the superior and inferior surfaces to contact one of the vertebral members when the implant is positioned within the intervertebral space;

a first tapered surface that extends in a first direction from the contact section to the sidewall;

a second tapered surface that extends in a second direction from the contact section to the sidewall, the second direction being different than the first direction; and

a third tapered surface positioned between and abutting the first and second tapered surfaces.

2. The implant of claim 1, wherein the contact section is substantially flat.

3. The implant of claim 1, wherein the contact section includes a greater surface area than either of the first, second, and third tapered surfaces.

4. The implant of claim 1, wherein the third tapered surface forms a smooth transition between the first and second tapered surfaces.

5. The implant of claim 1, wherein the first and second tapered surfaces extend outward from the contact section at different angles.

6. The implant of claim 1, further comprising a plurality of teeth positioned on the contact surface, each of the plurality of teeth including a first angled surface positioned towards the first tapered surface and a second angled surface positioned towards the second tapered surface.

7. The implant of claim 4, further comprising a plurality of teeth positioned on the contact surface, each of the plurality of teeth including an angled surface that is substantially aligned with the third tapered surface.

8. The implant of claim 1, further comprising a fourth tapered surface on one of the inferior and superior surfaces.

9. The implant of claim 1, wherein the sidewall further comprises a first receptacle opposite from the first tapered surface and a second receptacle opposite from the second tapered surface.

10. A vertebral implant sized to fit within an intervertebral space between vertebral members, the implant comprising:

a body including a contact surface and a surrounding sidewall;

a first tapered surface that extends from the contact surface in a first direction towards the sidewall;

a second tapered surface that extends from the contact surface in a second direction towards the sidewall; and

a third tapered surface extending along and between the first and second tapered surfaces, the third tapered surface being raised from the first and second tapered surfaces.

11. The implant of claim 10, wherein the contact surface is substantially flat.

12. The implant of claim 10, wherein a centerline of the third tapered extends substantially straight outward from the contact surface.

13. The implant of claim 10, further comprising an opening within an interior of the body to contain bone growth material.

15. The implant of claim 10, wherein the sidewall further comprises a first receptacle opposite from the first tapered surface and a second receptacle opposite from the second tapered surface.

16. The implant of claim 10, further comprising teeth positioned on the contact surface, the teeth including a first angled surface aligned with the first tapered surface and a second angled surface aligned with the second tapered surface.

17. The implant of claim 10, further comprising a plurality of teeth positioned on the contact surface, each of the plurality of teeth including an angled surface that is substantially aligned with the third tapered surface.

14. The implant of claim 14, wherein the opening further comprises a bottom wall.

18. A vertebral implant sized to fit within an intervertebral space between vertebral members, the implant comprising:

a body including a superior surface and an inferior surface;

a sidewall connecting the superior surface and the inferior surface;

a first set of three tapered surfaces extending between a first contact section of the superior surface and the sidewall; and

a second set of three tapered surfaces extending between a second contact section of the inferior surface and the sidewall.

19. The implant of claim 18, wherein the first set and the second set of tapered surfaces are positioned in an overlapping orientation.

20. The implant of claim 18, wherein the body further comprises a central opening to contain bone growth material.

21. A vertebral implant sized to fit within an intervertebral space between vertebral members, the implant comprising:

a body including superior and inferior surfaces and a sidewall;

a contact section positioned on one of the superior and inferior surfaces to contact one of the vertebral members when the implant is positioned within the intervertebral space;

a first tapered surface that extends in a first direction from the contact section to the sidewall;

a second tapered surface that extends in a second direction from the contact section to the sidewall, the second direction being different than the first direction;

a third tapered surface extending along and between the first and second tapered surfaces; and

a plurality of teeth positioned on the contact section and being aligned with the third tapered surface.

22. The implant of claim 21, wherein the plurality of teeth each include a first angled surface aligned with the first tapered surface and a second angled surface aligned with the second tapered surface.

23. The implant of claim 21, wherein each of the plurality of teeth includes an angled surface that is substantially aligned with the third tapered surface.

24. The implant of claim 21, further comprising a second plurality of teeth positioned on the contact section and including a shape that is different than the plurality of teeth.

25. The implant of claim 21, wherein the body further comprises a central opening to contain bone growth material.

26. The implant of claim 21, wherein the contact section is substantially flat.

27. The implant of claim 26, wherein the first tapered surface extends from the contact section at a first angle and the second tapered surface extends from the contact section at a second angle, the first and second angles being different.