Intervertebral disc repair

• US 20040097927A1
• Filed: 07/21/2003
• Published: 05/20/2004
• Est. Priority Date: 02/13/2001
• Status: Abandoned Application

• Current Assignee: Jeffrey E. Yeung, Teresa T. Yeung
• Original Assignee: Jeffrey E. Yeung, Teresa T. Yeung
• Inventors: Yeung, Teresa T., Yeung, Jeffrey E.
• Application Number:
  US10/470,181
• Publication Number:
  US 20040097927A1
• Time in Patent Office: Days
• US Class Current: 606/86.00A
• CPC Class Codes: A61B 17/1757 for the spine
• CPC Class Codes: A61B 17/70 Spinal positioners or stabilisers ; Bone stabilisers comprising fluid filler in an implant
• CPC Class Codes: A61B 2017/00004 (bio)absorbable, (bio)resorbable or resorptive
• CPC Class Codes: A61B 2017/00867 shape memory effect
• CPC Class Codes: A61F 2002/4435 Support means or repair of the natural disc wall, i.e. annulus, e.g. using plates, membranes or meshes

Abstract

A saddle-shaped compression device and methods of fastening a dysfunctional intervertebral disc are used to (1) compress a protrusion to alleviate nerve impingement, (2) fortify the annulus to stabilize a motion segment, (3) minimize the inward/outward bulging and delamination of the annulus, (4) atrophy the nerve to treat discogenic pain, (5) correct the curvature of spinal deformities, (6) elevate the disc space to treat spinal stenosis, and (7) seal the seepage of nucleus pulposus from a herniated disc.

Claims

1. A compression device for compressing a dysfunctional intervertebral disc, said compression device comprising:

an arcuate compression member having a compression surface,

said compression surface having a concave curvature within a horizontal plane extending therethrough, said concave curvature sized and configured to extend at least partway around and engage the intervertebral disc,

said compression surface having a convex curvature within a vertical plane extending therethrough,

and a compression means for pressing said compression surface against the dysfunctional intervertebral disc.

2. The compression device of claim 1, wherein said convex curvature is sized and configured fit between a patient'"'"'s vertebrae.

3. The compression device of claim 1, wherein said compression member has a top surface forming a first plateau surface and a bottom surface forming a second plateau surface.

4. The compression device of claim 3, wherein at least one of said first and second plateau surfaces has an indentation.

5. The compression device of claim 3, wherein said first and second plateau surfaces are nonparallel.

6. The compression device of claim 3, wherein said first and second plateau surfaces are generally parallel.

7. The compression device of claim 1, wherein when viewed in said vertical plane said compression surface is generally round.

8. The compression device of claim 1, wherein when viewed in said vertical plane said compression surface tapers to a rounded point.

9. The compression device of claim 1, wherein when viewed in said vertical plane said compression surface is nipple-shaped.

10. The compression device of claim 1, wherein when viewed in said vertical plane said compression surface has multiple curvatures.

11. The compression device of claim 1, further comprising a first tip and a second tip of said compression member, said first and second tips forming the ends of said concave curvature.

12. The compression device of claim 11, wherein a depth of said compression member is measured between said compression surface and an outside surface of said compression member, and wherein said depth narrows down to said first and second tips.

13. The compression device of claim 11, wherein said tips are curved outward.

14. The compression device of claim 1, wherein an outside surface of said compression member is indented to form a depression.

15. The compression device of claim 14, wherein said depression is sized and configured to contain a portion of said compression means.

16. The compression device of claim 15, wherein said compression means is a threaded bolt and a head of said bolt is sized to fit within said depression.

17. The compression device of claim 1, further comprising a protruding leg extending from said compression member, said protruding leg sized and configured to contact a vertebra, when said compression surface is at least partially located between two vertebrae.

18. The compression device of claim 17, further comprising at least one attachment hole extending through said protruding leg.

19. The compression device of claim 17, further comprising a second protruding leg extending from said compression member, wherein one of said protruding legs extends upwards and another of said protruding legs extends downward.

20. The compression device of claim 1, further comprising a pair of delivery tool engagement openings extending into said compression member on opposite sides thereof.

21. The compression device of claim 1, wherein said compression member is a clamp and said clamp extends around approximately three-fourths of the intervertebral disc.

22. The compression device of claim 21, wherein said compression surface is adjacent one side of the disc and further comprising a second compression surface adjacent an opposite side of the disc.

23. The compression device of claim 22, wherein said first and second compression surfaces have the same shape.

24. The compression device of claim 22, wherein said first and second compression surfaces have different shapes.

25. The compression device of claim 22, wherein said first and second compression surfaces are modular pieces attachable to the compression member

26. The compression device of claim 1, wherein said compression member extends around approximately one-fourth of the intervertebral disc.

27. The compression device of claim 1, wherein said compression device is resilient.

28. The compression device of claim 1, wherein at least a portion of said compression device is porous.

29. The compression device of claim 1, wherein said compression device is formed of a polymer.

30. The compression device of claim 1, wherein said compression device is formed of a nickel-titanium alloy.

31. The compression device of claim 1, wherein said compression device has at least one tissue ingrowth opening.

32. The compression device of claim 31, wherein bone grows into said tissue ingrowth opening to form vertebrae fusion.

33. The compression device of claim 1, wherein said compression member is a resilient clamp and resiliency of said clamp provides said compression means.

34. The compression device of claim 1, wherein said compression means is a bolt.

35. The compression device of claim 34, wherein said bolt is formed of a resilient material.

36. The compression device of claim 35, wherein said bolt is biased toward a curved configuration.

37. The compression device of claim 36, wherein said curved configuration has a plurality of arcs.

38. The compression device of claim 36, wherein said bolt has at least one slit and wherein said curved configuration is produced by the outward bowing of said slit.

39. The compression device of claim 36, further comprising a sleeve locatable around said bolt.

40. The compression device of claim 39, wherein said sleeve has a in-phase position and an out-of-phase position, wherein in said out-of-phase position, said bolt is constrained in a straightened position and wherein in said in-phase position, said bolt is release into said curved configuration with at least one curve extending through an opening in said sleeve.

41. The compression device of claim 39, wherein said sleeve is formed of a degradable material.

42. The compression device of claim 1, wherein said compression member is resilient.

43. The compression device of claim 42, further comprising a capsule, said capsule sized and configured to contain said compression member in a delivery position.

44. The compression device of claim 1, wherein said compression member is a resilient clamp and further comprising a compression member widening tool sized and configured to open and release said compression member.

45. The compression device of claim 44, further comprising a first tip having a first opening therein and a second tip having a second opening therein, said first and second tips forming ends of said concave curvature, and wherein said compression member widening tool has two arms, each arm having a post extending therefrom, each of said posts sized and configured to engage one of said first and second openings.

46. A trocar for puncturing through a dysfunctional intervertebral disc into an end plate for creating a bleeding site, said trocar comprising:

an elongated body having a sharp distal tip and a resilient curvature proximate said distal tip,

a handle attached to a proximal end of said elongated body,

and a generally rigid sleeve locatable around said resilient curvature.

47. The trocar of claim 46, wherein said elongated body is formed of a nickel-titanium alloy.

48. The trocar of claim 46, further comprising a label on said handle, said label indicating the direction of said resilient curvature.

49. A method of compressing a dysfunctional intervertebral disc, the method comprising the steps of:

(a) opening a resilient disc clamp;

(b) locating said disc clamp around a majority of the dysfunctional intervertebral disc;

(c) and releasing said disc clamp, thereby allowing said disc clamp to compress the disc.

50. The method of claim 49, wherein a widening tool is used to open and release said disc clamp.

51. The method of claim 49, further comprising the step of:

(d) attaching said disc clamp to a vertebra

52. The method of claim 49, further comprising the step of:

(d) protecting a patient'"'"'s nerves during steps (a)-(c).

53. The method of claim 49, further comprising the step of:

(d) pressing a disc compression surface of said clamp between a patient'"'"'s vertebrae.

54. The method of claim 49, further comprising the step of:

(d) puncturing an end plate of the dysfunctional disc with a trocar to create a bleeding site.

55. The method of claim 49, further comprising the step of:

(d) allowing said disc clamp to press into said dysfunctional disc until a protruding leg extending from said clamp rests against a vertebra.

56. The method of claim 49, further comprising the step of:

(d) selecting a first compression surface for a first side of the disc and a second compression surface for a second side of the disc.

57. The method of claim 49, further comprising the step of:

(d) selecting a first compression surface for a first side of the disc and a second different compression surface for a second side of the disc.

58. The method of claim 49, wherein the method is used to alleviate nerve impingement.

59. The method of claim 49, wherein the method is used to treat segmental instability.

60. The method of claim 49, wherein the method is used to minimize annular delamination.

61. The method of claim 49, wherein the method is used to atrophy a nerve.

62. The method of claim 49, wherein the method is used to treat spinal stenosis.

63. The method of claim 49, wherein the method is used to treat kyphosis.

64. The method of claim 49, wherein the method is used to treat scoliosis.

65. A method of compressing a dysfunctional intervertebral disc, the method comprising the steps of:

(a) pressing a disc compression surface of a disc compression member against the dysfunctional intervertebral disc;

(b) attaching said disc compression member to a vertebra.

66. The method of claim 65, further comprising the step of:

(c) resiliently pressing said disc compression surface against said disc until said disc compression surface is located between two vertebrae.

67. The method of claim 65, further comprising the step of:

(c) attaching said disc compression member to a second vertebra.

68. The method of claim 67, further comprising the step of:

(d) repeating steps (a)-(c) to attach a second disc compression member.

69. The method of claim 65, further comprising the step of:

(c) repeating steps (a) and (b) to attach a second disc compression member.

70. The method of claim 65, further comprising the step of:

(c) puncturing end plate of the dysfunctional disc with a trocar to create a bleeding site.

71. The method of claim 65, wherein said disc compression member is resiliently attached to the vertebra with a bolt.

72. The method of claim 71, wherein said bolt is located with a sleeve during delivery.

73. The method of claim 72, wherein said bolt has an in-phase position and an out-of-phase position with respect to said sleeve and further comprising the step of moving said bolt from the out-of phase position to the in-phase position wherein at least a portion of said bolt extends out an opening in said sleeve.

74. The method of claim 65, wherein said disc compression member is attached to a side of the vertebra.

75. The method of claim 65, wherein said disc compression member is attached through an end plate of the vertebra.