Methods for adjustable bone fusion implants

• US 6,863,673 B2
• Filed: 08/28/2003
• Issued: 03/08/2005
• Est. Priority Date: 10/17/2001
• Status: Expired due to Term

• Current Assignee: IMDS LLC
• Original Assignee: Movdice Holding Inc., Medicinelodge, Inc (Nelso Antolotti)
• Inventors: Fallin, T. Wade, Gerbec, Daniel E., Faciszewski, Tom
• Primary Examiner(s): Philogene, Pedro
• Assistant Examiner(s): Bonderer, David A.
• Application Number:
  US10/651,138
• Publication Number:
  US 20040054412A1
• Time in Patent Office: 558 Days
• Field of Search: 623/12.15, 606/61, 606/63, 606/89, 606/90, 606/99, 128/898
• US Class Current: 606/99
• CPC Class Codes: A61B 2017/0256 for the spine
• 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 2/447 substantially parallelepipedal, e.g. having a rectangular or trapezoidal cross-section
• CPC Class Codes: A61F 2/4601 for introducing bone substitute, for implanting bone graft implants or for compacting them in the bone cavity
• CPC Class Codes: A61F 2/4603 for insertion or extraction of endoprosthetic joints or of accessories thereof
• CPC Class Codes: A61F 2/4611 of spinal prostheses
• CPC Class Codes: A61F 2/4637 for connecting or disconnecting two parts of a prosthesis
• 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 2002/30266 wedge-shaped parallelepipeds
• CPC Class Codes: A61F 2002/30487 Circumferential cooperating grooves and beads on cooperating lateral surfaces of a mainly longitudinal connection
• CPC Class Codes: A61F 2002/3052 unrestrained in only one direction, e.g. moving unidirectionally
• CPC Class Codes: A61F 2002/30522 releasable, e.g. using a releasable ratchet
• CPC Class Codes: A61F 2002/3055 for adjusting length
• CPC Class Codes: A61F 2002/30556 for adjusting thickness
• CPC Class Codes: A61F 2002/30593 hollow
• CPC Class Codes: A61F 2002/30774 internally-threaded
• CPC Class Codes: A61F 2002/30777 Oblong apertures
• CPC Class Codes: A61F 2002/30784 Plurality of holes
• CPC Class Codes: A61F 2002/30785 parallel
• CPC Class Codes: A61F 2002/30789 perpendicular with respect to each other
• CPC Class Codes: A61F 2002/30841 : Sharp anchoring protrusions for impaction into the bone, e.g. sharp pins, spikes
• CPC Class Codes: A61F 2002/30892 : parallel
• CPC Class Codes: A61F 2002/30975 : made of two halves
• CPC Class Codes: A61F 2002/4622 : having the shape of a forceps or a clamp
• 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 2002/4628 : with linear motion along or rotating motion about an axis transverse to the instrument axis or to the implantation direction, e.g. clamping
• CPC Class Codes: A61F 2002/4629 : connected to the endoprosthesis or implant via a threaded connection
• CPC Class Codes: A61F 2002/4635 : using minimally invasive surgery
• CPC Class Codes: A61F 2220/0025 : Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements
• CPC Class Codes: A61F 2230/0082 : parallelepipedal
• CPC Class Codes: A61F 2250/0009 : for adjusting thickness

Abstract

A method for fusing two adjacent bones or pieces of bone includes positioning an adjustable fusion implant between two adjacent bones or pieces of bone, the fusion implant having a first plate and an opposing second plate. A portion of a tool inserted between the first plate and the second plate of the fusion implant is expanded so as to expand the fusion implant between the bones or pieces of bone. The tool is then removed from the expanded fusion implant.

Claims

1. A method for fusing two adjacent bones or pieces of bone, the method comprising:

removably securing a distal end of an inserter to an adjustable fusion implant;

positioning the adjustable fusion implant between two adjacent bones or pieces of bone;

expanding the fusion implant between the bones or pieces of bone;

sliding a reinforcing member along the inserter so that the reinforcing member couples with the expanded fusion implant; and

disconnecting the inserter from the fusion implant.

2. A method as recited in claim 1, wherein the act of positioning comprises placing the adjustable fusion implant between two adjacent vertebrae.

3. A method as recited in claim 1, wherein the fusion implant has a first plate and an opposing second plate with a compartment formed therebetween, the method further comprising inserting the reinforcing member between the first plate and the second plate after the fusion implant has been expanded.

4. A method as recited in claim 1, further comprising inserting a portion of a tool used to expand the fusion implant within the fusion implant prior to the act of positioning the adjustable fusion implant.

5. A method a recited in claim 1, further comprising at least partially packing the fusion implant with an osteogenic substance after the fusion implant is expanded.

6. A method as recited in claim 1, wherein the act of expanding comprises:

expanding at least a portion of a tool within the fusion implant so as to selectively expand the fusion implant; and

removing the tool from within the fusion implant.

7. A method as recited in claim 1, wherein the act of sliding the reinforcing member comprises:

advancing a tubular push rod over a proximal end of the inserter; and

moving the push rod along the inserter so that the push rod advances the reinforcing member into at least a portion of the compartment.

8. A method as recited in claim 1, wherein the act of sliding the reinforcing member comprises:

removably connecting a distal end of a tubular push rod to the reinforcing member; and

moving the push rod along the inserter so that the push rod advances the reinforcing member into at least a portion of the compartment.

9. A method as recited in claim 8, further comprising:

removing the inserter; and

delivering bone graft through the tubular push rod and into the compartment.

10. A method as recited in claim 1, wherein the fusion implant is expanded by removably inserting a tool within the fusion implant.

11. A method as recited in claim 1, wherein a push rod is removably connected to the reinforcing member prior to sliding the reinforcing member along the inserter.

12. A method for fusing two adjacent bones or pieces of bone, the method comprising:

removably securing a distal end of an inserter to an adjustable fusion implant;

positioning the adjustable fusion implant between two adjacent bones or pieces of bone; and

sliding an expansion tool along the inserter so that at least a portion of the expansion tool is removably received within the fusion implant, the expansion tool being adapted to facilitate expansion of the fusion implant.

13. A method as recited in claim 12, wherein the act of positioning comprises placing the adjustable fusion implant between two adjacent vertebrae.

14. A method as recited in claim 12, further comprising:

sliding a reinforcing member along the inserter so that the reinforcing member couples with the expanded fusion implant; and

disconnecting the inserter from the fusion implant.

15. A method as recited in claim 12, further comprising inserting a reinforcing member into the fusion implant after the expansion tool has been removed from the fusion implant.

16. A method as recited in claim 12, wherein the portion of the expansion tool is inserted within the fusion implant prior to the act of positioning the adjustable fusion implant.

17. A method as recited in claim 12, further comprising at least partially packing the fusion implant with an osteogenic substance after the fusion implant is expanded.

18. A method as recited in claim 12, wherein at least a portion of the inserter is threadedly connected to the fusion implant.

19. A method as recited in claim 12, further comprising expanding the portion of the expansion tool within the fusion implant.

20. A method as recited in claim 12, wherein the fusion implant is expanded when the expansion tool is received within the fusion implant.

21. A method for fusing two vertebrae, the method comprising:

mechanically interlocking an inserter to an adjustable fusion implant such that the inserter is temporarily fixed to the fusion implant;

positioning the adjustable fusion implant between two adjacent bones or pieces of bone;

expanding the fusion implant between the bones or pieces of bone;

coupling a reinforcing member to the expanded fusion implant using the inserter as a guide for the reinforcing member; and

disconnecting the inserter from the fusion implant.

22. A method as recited in claim 21, wherein the act of expanding comprises:

expanding at least a portion of a tool within the fusion implant so as to selectively expand the fusion implant; and

removing the tool from within the fusion implant.

24. A method as recited in claim 21, wherein the fusion implant has a first plate and an opposing second plate with a compartment formed therebetween, the method further comprising inserting the reinforcing member between the first plate and the second plate after the fusion implant has been expanded.

25. A method as recited in claim 24, wherein the reinforcing member is inserted within the compartment of the fusion implant.

26. A method as recited in claim 21, wherein mechanically interlocking an insertor to an adjustable fusion implant comprises threadedly connecting at least a portion of the inserter to the fusion implant.

27. A method as recited in claim 21, wherein the fusion implant is expanded by inserter an expansion tool within the fusion implant.

28. A method as recited in claim 21, further comprising removably connecting a push rod to the reinforcing member prior to coupling the reinforcing member to the expanded fusion implant.

29. A method as recited in claim 28, further comprising threadedly connecting the push rod to the reinforcing member.

30. A method as recited in claim 28, further comprising using the push rod to slide the reinforcing member along the inserter.

31. A method as recited in claim 21, further comprising packing the reinforcing member with an osteogenic substance prior to coupling the reinforcing member to the fusion implant.

23. A method as recited in claim 23, further comprising inserting the portion of the tool within the fusion implant prior to the act of inserting the adjustable fusion implant.