Spinal fusion implant

• US 6,245,108 B1
• Filed: 01/31/2000
• Issued: 06/12/2001
• Est. Priority Date: 02/25/1999
• Status: Expired due to Term

• Current Assignee: Depuy Acromed Incorporated (Johnson & Johnson)
• Original Assignee: Spineco, Inc.
• Inventors: Biscup, Robert S.
• Primary Examiner(s): Philogene, Pedro
• Application Number:
  US09/494,645
• Time in Patent Office: 498 Days
• Field of Search: 623/17.16, 623/17.11, 623/16.11, 606/60, 606/61, 606/53
• US Class Current: 623/17.11
• CPC Class Codes: A61F 2/30965 Reinforcing the prosthesis by embedding particles or fibres during moulding or dipping
• 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 2002/2835 Bone graft implants for filling a bony defect or an endoprosthesis cavity, e.g. by synthetic material or biological material
• CPC Class Codes: A61F 2002/30151 rhomboidal or parallelogram-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 2002/30787 inclined obliquely with respect to each other
• CPC Class Codes: A61F 2002/30904 serrated profile, i.e. saw-toothed
• CPC Class Codes: A61F 2002/448 comprising multiple adjacent spinal implants within the same intervertebral space or within the same vertebra, e.g. comprising two adjacent spinal implants
• CPC Class Codes: A61F 2230/0017 Angular shapes
• CPC Class Codes: A61F 2230/0034 D-shaped
• CPC Class Codes: A61F 2310/00017 Iron- or Fe-based alloys, e.g. stainless steel
• CPC Class Codes: A61F 2310/00023 Titanium or titanium-based alloys, e.g. Ti-Ni alloys
• CPC Class Codes: A61F 2310/00029 Cobalt-based alloys, e.g. Co-Cr alloys or Vitallium
• CPC Class Codes: Y10S 606/908 Bioabsorbable material
• CPC Class Codes: Y10S 606/909 Bone
• CPC Class Codes: Y10S 606/91 Polymer
• CPC Class Codes: Y10S 606/911 : Memory material
• CPC Class Codes: Y10S 606/912 : Radiolucent material

Abstract

An improved prosthetic implant for forming a rigid structure between adjoining vertebrae in a spinal column. The prosthetic implant includes a cage having a top, bottom, front end, back end, first side and second side walls. The first side wall has an arcuate surface. The top and bottom wall include one or more ridges to engage a surface of an adjacent vertebrae. The top and bottom wall also include an opening to receive packing material such as medicine, human tissue and the like. The top and bottom walls also incline simultaneously in two directions.

Claims

1. A prosthetic implant to form a rigid structure between adjoining vertebrae in a spinal column comprising a cage defined by top, bottom, front end, back end, first side and second side walls, said first and second side walls extending substantially along a longitudinal axis of said cage, said front and back end walls having a width less than the length of said first side and said second side walls, said top wall and said bottom wall positionable between and engageable with a surface of an adjacent vertebrae, said first side wall having an arcuate surface, said second side wall being a substantially planar surface, said top wall being inclined downwardly from said back end wall to said front end wall such that at least a portion of said back end wall has a height greater than a height of at least a portion of said front end wall.

2. The prosthetic implant as defined in claim 1, wherein said top wall includes at least one ridge to engage a surface of an adjacent vertebrae.

3. The prosthetic implant as defined in claim 1, wherein said bottom wall includes at least one ridge to engage a surface of an adjacent vertebrae.

4. The prosthetic implant as defined in claim 2, wherein said top wall includes a plurality of ridges.

5. The prosthetic implant as defined in claim 2, wherein at least one of said ridge includes a plurality of teeth.

6. The prosthetic implant as defined in claim 2, wherein said ridge being spaced from a peripheral edge of said first or second side wall.

7. The prosthetic implant as defined in claim 1, wherein said top wall including an opening to receive packing material, said packing material including a material selected from the group consisting of medicine, human tissue, animal tissue, synthetic tissue, human cells, animal cells, synthetic cells, and combinations thereof.

8. The prosthetic implant as defined in claim 1, wherein said bottom wall including an opening to receive packing material, said packing material including a material selected from the group consisting of medicine, human tissue, animal tissue, synthetic tissue, human cells, animal cells, synthetic cells, and combinations thereof.

9. The prosthetic implant as defined in claim 1, wherein said top wall having a peripheral edge, at least a portion of said peripheral edge being contoured so as not to be sharp.

10. The prosthetic implant as defined in claim 1, wherein said bottom wall having a peripheral edge, at least a portion of said peripheral edge being contoured so as not to be sharp.

11. The prosthetic implant as defined in claim 1, wherein said top wall being inclined from said second side wall to said first side wall.

12. The prosthetic implant as defined in claim 1, wherein said bottom wall being inclined from said second side wall to said first side wall.

13. The prosthetic implant as defined in claim 1, wherein said incline of said top wall being having a substantially constant slope.

14. The prosthetic implant as defined in claim 1, wherein said bottom wall being inclined from said back end wall to said front end wall.

15. The prosthetic implant as defined in claim 1, wherein said first side wall including an opening to receive packing material, said packing material including a material selected from the group consisting of medicine, human tissue, animal tissue, synthetic tissue, human cells, animal cells, synthetic cells, and combinations thereof.

16. The prosthetic implant as defined in claim 1, wherein said second side wall including an opening to receive packing material, said packing material including a material selected from the group consisting of medicine, human tissue, animal tissue, blood, stem cells and combinations thereof.

17. The prosthetic implant as defined in claim 1, wherein at least one of said front end wall, said back end wall, said first side wall and said second side wall including an opening, said opening adapted to receive an instrument to guide said prosthetic implant between adjoining vertebrae in a spinal column, to receive an implant to secure said cage in position relative to said vertebrae, and combinations thereof.

18. The prosthetic implant as defined in claim 1, wherein said first side wall being a substantially uniform arcuate surface.

19. A prosthetic implant to form a rigid structure between adjoining vertebrae in a spinal column comprising a cage defined by top, bottom, front end, back end, first side and second side walls, said first and second side wall extending substantially along a longitudinal axis of said cage, said front and back end walls having a width that is less than the length of said first side and said second side walls, said top wall and said bottom wall positionable between and engageable with a surface of an adjacent vertebrae, at least one of said top and bottom walls being inclined downwardly from said second side wall to said first side wall such that at least a portion of said second side wall has a height greater than a height of at least a portion of said first side wall.

20. The prosthetic implant as defined in claim 19, wherein both said top and bottom walls being inclined from said second side wall to said first side wall.

21. The prosthetic implant as defined in claim 19, wherein said second side wall being higher that said first side wall.

22. The prosthetic implant as defined in claim 19, wherein said top and bottom walls include a plurality of ridges to engage a surface of an adjacent vertebrae.

23. The prosthetic implant as defined in claim 22, wherein said ridges include a plurality of teeth.

24. The prosthetic implant as defined in claim 19, wherein said ridges are spaced from a peripheral edge of said first and second side wall.

25. The prosthetic implant as defined in claim 19, wherein said top and bottom walls include an opening to receive packing material, said packing material including a material selected from the group consisting of medicine, human tissue, animal tissue, synthetic tissue, human cells, animal cells, synthetic cells, and combinations thereof.

26. The prosthetic implant as defined in claim 19, wherein said top, bottom, front end, back end, first side and second side walls each having a peripheral edge, at least a portion of said peripheral edges of each of said walls being contoured so as not to be sharp.

27. The prosthetic implant as defined in claim 19, wherein said top and bottom walls are inclined from said back end wall to said front end wall.

28. The prosthetic implant as defined in claim 19, wherein said back side wall being higher than said front side wall.

29. The prosthetic implant as defined in claim 19, wherein at least one of said front end wall, said back end wall, said first side wall and said second side wall including an opening, said opening adapted to receive an instrument to guide said prosthetic implant between adjoining vertebrae in a spinal column, to receive an implant to secure said cage in position relative to said vertebrae, and combinations thereof.

30. The prosthetic implant as defined in claim 29, including a cavity within said cage, said cavity in communication with said at least one of said opening in at least one of said front end, said back end, said first side and said second side walls, said cavity adapted to receive packing material that includes a material selected from the group consisting of medicine, human tissue, animal tissue, synthetic tissue, human cells, animal cells, synthetic cells, and combinations thereof.

31. The prosthetic implant as defined in claim 19, wherein said front side wall having a substantially uniform arcuate surface.

32. A prosthetic implant to form a rigid structure between adjoining vertebrae in a spinal column comprising a cage defined by top, bottom, front end, back end, first side and second side walls, said first and second side walls extending substantially along a longitudinal axis of said cage, said front and back end walls having a width less than the length of said first side and said second side walls, said top wall and said bottom wall positionable between and engageable with a surface of an adjacent vertebrae, said first side wall having an arcuate surface, at least one of said top and bottom walls being inclined downwardly from said back end wall to said front end wall such that at least a portion of said back end wall has a height greater than a height of at least a portion of said front end wall, at least one of said top and bottom walls being inclined downwardly from said second side wall to said first side wall such that at least a portion of said second side wall has a height greater than a height of at least a portion of said first side wall.

33. The prosthetic implant as defined in claim 32, wherein said top wall includes a plurality of ridges to engage a surface of an adjacent vertebrae, at least one of said ridge includes a plurality of teeth.

34. The prosthetic implant as defined in claim 32, wherein said bottom wall includes a plurality of ridges to engage a surface of an adjacent vertebrae, at least one of said ridge includes a plurality of teeth.

35. The prosthetic implant as defined in claim 33, wherein said top wall includes a plurality of ridges to engage a surface of an adjacent vertebrae, at least one of said ridge includes a plurality of teeth.

36. The prosthetic implant as defined in claim 35, wherein said plurality of ridges are spaced from a peripheral edge of said first and second side wall.

37. The prosthetic implant as defined in claim 32, wherein said top wall and said bottom being inclined from said second side wall to said first side wall.

38. The prosthetic implant as defined in claim 32, wherein incline of said top wall from said second side wall to said first side wall having a substantially constant slope.

39. The prosthetic implant as defined in claim 32, in incline of said bottom wall from said second side wall to said first side wall having a substantially constant slope.

40. The prosthetic implant as defined in claim 37, wherein incline of said top wall and said bottom wall from said second side wall to said first side wall having a substantially constant slope.

41. The prosthetic implant as defined in claim 32, wherein said top wall and said bottom being inclined from said back end wall to said front end wall.

42. The prosthetic implant as defined in claim 40, wherein said top wall and said bottom being inclined from said back end wall to said front end wall.

43. The prosthetic implant as defined in claim 32, wherein incline of said top wall from said back end wall to said front end wall having a substantially constant slope.

44. The prosthetic implant as defined in claim 32, wherein incline of said bottom wall from said back end wall to said front end wall having a substantially constant slope.

45. The prosthetic implant as defined in claim 41, wherein incline of said top wall and said bottom wall from said back end wall to said front end wall having a substantially constant slope.

46. The prosthetic implant as defined in claim 42, wherein incline of said top wall and said bottom wall from said back end wall to said front end wall having a substantially constant slope.

47. The prosthetic implant as defined in claim 32, wherein said top wall including an opening to receive packing material, said packing material including a material selected from the group consisting of medicine, human tissue, animal tissue, synthetic tissue, human cells, animal cells, synthetic cells, and combinations thereof.

48. The prosthetic implant as defined in claim 32, wherein said bottom wall including an opening to receive packing material, said packing material including a material selected from the group consisting of medicine, human tissue, animal tissue, synthetic tissue, human cells, animal cells, synthetic cells, and combinations thereof.

49. The prosthetic implant as defined in claim 32, wherein said first side wall including an opening to receive packing material, said packing material including a material selected from the group consisting of medicine, human tissue, animal tissue, synthetic tissue, human cells, animal cells, synthetic cells, and combinations thereof.

50. The prosthetic implant as defined in claim 32, wherein said second side wall including an opening to receive packing material, said packing material including a material selected from the group consisting of medicine, human tissue, animal tissue, blood, stem cells and combinations thereof.

51. The prosthetic implant as defined in claim 32, wherein said top, bottom, front end, back end, first side and second side walls each having a peripheral edge, at least a portion of said peripheral edges of each of said walls being contoured so as not to be sharp.

52. The prosthetic implant as defined in claim 32, wherein at least one of said front end wall, said back end wall, said first side wall and said second side wall including an opening, said opening adapted to receive an instrument to guide said prosthetic implant between adjoining vertebrae in a spinal column, to receive an implant to secure said cage in position relative to said vertebrae, and combinations thereof.

53. The prosthetic implant as defined in claim 32, wherein said first side wall being a substantially uniform arcuate surface.

54. The prosthetic implant as defined in claim 32, wherein said second side wall being a substantially planar surface.

55. The prosthetic implant as defined in claim 53, wherein said second side wall being a substantially planar surface.

56. The prosthetic implant as defined in claim 46, wherein said first side wall being a substantially uniform arcuate surface.

57. The prosthetic implant as defined in claim 56, wherein said second side wall being a substantially planar surface.

58. The prosthetic implant as defined in claim 32, wherein said top, bottom, front end, back end, first side and second side walls each having a peripheral edge, at least a portion of said peripheral edges of each of said walls being contoured so as not to be sharp.

59. The prosthetic implant as defined in claim 58, wherein said top wall includes a plurality of ridges to engage a surface of an adjacent vertebrae, at least one of said ridge includes a plurality of teeth.