CA2591326A1 - Method and apparatus for replacing a spinal disc - Google Patents

Method and apparatus for replacing a spinal disc Download PDF

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Publication number
CA2591326A1
CA2591326A1 CA002591326A CA2591326A CA2591326A1 CA 2591326 A1 CA2591326 A1 CA 2591326A1 CA 002591326 A CA002591326 A CA 002591326A CA 2591326 A CA2591326 A CA 2591326A CA 2591326 A1 CA2591326 A1 CA 2591326A1
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CA
Canada
Prior art keywords
set forth
rail
vertebra
retaining
vertebrae
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CA002591326A
Other languages
French (fr)
Other versions
CA2591326C (en
Inventor
Raymond S. Ross
Isador H. Lieberman
Edward C. Benzel
Lee Strnad
Keith Duke
James M. Kuras
Kari Zimmers
Charles F. Birchall, Jr.
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Axiomed Spine Corp
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Individual
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Publication date
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Publication of CA2591326A1 publication Critical patent/CA2591326A1/en
Application granted granted Critical
Publication of CA2591326C publication Critical patent/CA2591326C/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/02—Prostheses implantable into the body
    • A61F2/30—Joints
    • A61F2/44—Joints for the spine, e.g. vertebrae, spinal discs
    • A61F2/442—Intervertebral or spinal discs, e.g. resilient
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/56—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/16—Bone cutting, breaking or removal means other than saws, e.g. Osteoclasts; Drills or chisels for bones; Trepans
    • A61B17/1662—Bone cutting, breaking or removal means other than saws, e.g. Osteoclasts; Drills or chisels for bones; Trepans for particular parts of the body
    • A61B17/1671—Bone cutting, breaking or removal means other than saws, e.g. Osteoclasts; Drills or chisels for bones; Trepans for particular parts of the body for the spine
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
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    • A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/16—Bone cutting, breaking or removal means other than saws, e.g. Osteoclasts; Drills or chisels for bones; Trepans
    • A61B17/17—Guides or aligning means for drills, mills, pins or wires
    • A61B17/1739—Guides or aligning means for drills, mills, pins or wires specially adapted for particular parts of the body
    • A61B17/1757—Guides or aligning means for drills, mills, pins or wires specially adapted for particular parts of the body for the spine
    • A—HUMAN NECESSITIES
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    • A61B17/56—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor
    • A61B17/58—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor for osteosynthesis, e.g. bone plates, screws, setting implements or the like
    • A61B17/68—Internal fixation devices, including fasteners and spinal fixators, even if a part thereof projects from the skin
    • A61B17/70—Spinal positioners or stabilisers ; Bone stabilisers comprising fluid filler in an implant
    • A—HUMAN NECESSITIES
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    • A61B17/56—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor
    • A61B17/58—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor for osteosynthesis, e.g. bone plates, screws, setting implements or the like
    • A61B17/88—Osteosynthesis instruments; Methods or means for implanting or extracting internal or external fixation devices
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    • A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/02—Prostheses implantable into the body
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    • A61F2/4603—Special tools or methods for implanting or extracting artificial joints, accessories, bone grafts or substitutes, or particular adaptations therefor for insertion or extraction of endoprosthetic joints or of accessories thereof
    • A61F2/4611—Special tools or methods for implanting or extracting artificial joints, accessories, bone grafts or substitutes, or particular adaptations therefor for insertion or extraction of endoprosthetic joints or of accessories thereof of spinal prostheses
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    • A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
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    • A61F2002/30329—Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements
    • A61F2002/30331—Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements made by longitudinally pushing a protrusion into a complementarily-shaped recess, e.g. held by friction fit
    • A61F2002/30332—Conically- or frustoconically-shaped protrusion and recess
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    • A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
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    • A61F2002/30001—Additional features of subject-matter classified in A61F2/28, A61F2/30 and subgroups thereof
    • A61F2002/30316—The prosthesis having different structural features at different locations within the same prosthesis; Connections between prosthetic parts; Special structural features of bone or joint prostheses not otherwise provided for
    • A61F2002/30329—Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements
    • A61F2002/30476—Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements locked by an additional locking mechanism
    • A61F2002/30507—Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements locked by an additional locking mechanism using a threaded locking member, e.g. a locking screw or a set screw
    • A—HUMAN NECESSITIES
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    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/02—Prostheses implantable into the body
    • A61F2/30—Joints
    • A61F2002/30001—Additional features of subject-matter classified in A61F2/28, A61F2/30 and subgroups thereof
    • A61F2002/30316—The prosthesis having different structural features at different locations within the same prosthesis; Connections between prosthetic parts; Special structural features of bone or joint prostheses not otherwise provided for
    • A61F2002/30535—Special structural features of bone or joint prostheses not otherwise provided for
    • A61F2002/30563—Special structural features of bone or joint prostheses not otherwise provided for having elastic means or damping means, different from springs, e.g. including an elastomeric core or shock absorbers
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/02—Prostheses implantable into the body
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    • A61F2002/30001—Additional features of subject-matter classified in A61F2/28, A61F2/30 and subgroups thereof
    • A61F2002/30316—The prosthesis having different structural features at different locations within the same prosthesis; Connections between prosthetic parts; Special structural features of bone or joint prostheses not otherwise provided for
    • A61F2002/30535—Special structural features of bone or joint prostheses not otherwise provided for
    • A61F2002/30574—Special structural features of bone or joint prostheses not otherwise provided for with an integral complete or partial collar or flange
    • A—HUMAN NECESSITIES
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    • A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
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    • A61F2002/30001—Additional features of subject-matter classified in A61F2/28, A61F2/30 and subgroups thereof
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    • A61F2002/30535—Special structural features of bone or joint prostheses not otherwise provided for
    • A61F2002/30579—Special structural features of bone or joint prostheses not otherwise provided for with mechanically expandable devices, e.g. fixation devices
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    • A61F2/02—Prostheses implantable into the body
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    • A61F2/30771—Special external or bone-contacting surface, e.g. coating for improving bone ingrowth applied in original prostheses, e.g. holes or grooves
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    • A61F2002/30878—Special external or bone-contacting surface, e.g. coating for improving bone ingrowth applied in original prostheses, e.g. holes or grooves with non-sharp protrusions, for instance contacting the bone for anchoring, e.g. keels, pegs, pins, posts, shanks, stems, struts
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    • A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
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    • A61F2220/00—Fixations or connections for prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof
    • A61F2220/0025—Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements
    • A61F2220/0033—Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements made by longitudinally pushing a protrusion into a complementary-shaped recess, e.g. held by friction fit

Abstract

A method for replacing a spinal disc between first and second vertebrae including determining a reference point on the spinal column. A marker is connected to a vertebrae at a reference point. The marker is engaged with a guide assembly for guiding insertion of a surgical instrument between the first and second vertebrae. The apparatus is inserted between the first and second vertebrae. An outer surface of the apparatus is engageable with the first vertebrae and a rail extending from the outer surface is engageable with the first vertebrae to connect the apparatus to the first vertebrae. First and second projections extend from the outer surface and each projection is engageable with the first vertebrae to connect the apparatus to the first vertebrae. The first projection extends from the outer surface a first distance. The second projection extends from the outer surface a second distance greater than the first distance.

Claims (75)

1. A method for replacing a spinal disc between first and second vertebrae of a spinal column comprising:
determining a reference point on the spinal column;
connecting a marker to a vertebra of the spinal column at the reference point;
engaging the marker with a guide assembly for guiding insertion of a surgical instrument between the first and second vertebrae to prepare the space between the first and second vertebrae for receiving an apparatus between the first and second vertebrae; and inserting the apparatus between the first and second vertebrae.
2. A method as set forth in claim 1 including determining a midline of the spinal column.
3. A method as set forth in claim 2 including inserting the marker into a vertebra of the spinal column at the midline of the spinal column.
4. A method as set forth in claim 1 including inserting a spacer between the first and second vertebrae to determine the reference point.
5. A method as set forth in claim 4 including telescoping a first portion of the guide assembly over a rod extending from the spacer inserted between the first and second vertebrae.
6. A method as set forth in claim 5 including extending the marker parallel to the rod extending from the spacer.
7. A method as set forth in claim 6 including telescoping a second portion of the guide assembly over the marker.
8. A method as set forth in claim 1 including providing the marker with a plurality of shafts that engage the vertebra.
9. A method as set forth in claim 8 including providing the marker with three shafts that engage the vertebra.
10. A method as set forth in claim 1 including moving a second portion of the guide assembly in a direction extending transverse to a longitudinal axis of the first portion of the guide assembly.
11. A method as set forth in claim 10 including moving the second portion in a direction extending transverse to an axis of the first portion of the guide assembly.
12. A method as set forth in claim 1 including inserting a cutter between the first and second vertebrae to cut the first and second vertebrae.
13. A method as set forth in claim 12 including guiding insertion of the cutter between the first and second vertebrae with the guide assembly.
14. A method as set forth in claim 1 including inserting an artificial disc between the first and second vertebrae.
15. A method as set forth in claim 1 including engaging a shaft of the marker and a stabilizing member of the marker to the vertebra.
16. A method as set forth in claim 1 including providing the apparatus with a resilient core having a first surface and a second surface, a first retaining member connected to the first surface of the resilient core, and a second retaining member connected to the second surface of the resilient core, engaging an outer surface of the first retaining member with a first vertebra of the spinal column, engaging an outer surface of the second retaining member with a second vertebra of the spinal column.
17. A method as set forth in claim 1 including engaging the apparatus with a tamping member and striking the tamping member to further position the implant between the vertebrae.
18. A method as set forth in claim 1 including inserting a guide member between the first and second vertebrae.
19. A method as set forth in claim 18 including guiding insertion of the guide member between the first and second vertebrae with the guide mechanism.
20. A method as set forth in claim 18 including guiding insertion of a mounting member for connecting the apparatus to the vertebra into the vertebra with the guide member between the first and second vertebrae.
21. A method as set forth in claim 1 including preventing relative movement between the first and second vertebrae.
22. A method as set forth in claim 21 including connecting a vertebral stabilizer to the first and second vertebrae to prevent relative movement between the first and second vertebrae.
23. An apparatus for replacing a spinal disc in a spinal column, said apparatus comprising:
a first end;
a second opposite end;
first and second lateral sides extending between said first and second ends;
an outer surface engageable with a first vertebra of the spinal column; and a first rail extending from said outer surface engageable with the first vertebra to connect said apparatus to the first vertebra, said first rail extending a first distance from said outer surface adjacent said first end, said first rail extending a second distance from said outer surface adjacent said second end, said second distance being greater than said first distance.
24. An apparatus as set forth in claim 23 wherein said first rail includes a plurality of projections extending from said outer surface.
25. An apparatus as set forth in claim 24 wherein a first projection of said first rail extends from said outer surface a distance less than a second projection of said first rail located closer to said second end extends from said outer surface.
26. An apparatus as set forth in claim 24 wherein a first projection of said first rail has a first surface facing outward and toward said first end and a second surface facing outward and toward said second end, said first projection including first and second lateral surfaces facing outward and toward said first and second lateral sides, said first projection including an upper surface extending generally parallel to said outer surface.
27. An apparatus as set forth in claim 23 further including a second rail extending from said outer surface engageable with the first vertebra to connect said apparatus to the first vertebra, said second rail extending generally parallel to said first rail.
28. An apparatus as set forth in claim 27 wherein said second rail extends from said outer surface a distance greater than said first rail extends from said outer surface.
29. An apparatus as set forth in claim 28 wherein said second rail is located closer to said first lateral side than said first rail.
30. An apparatus as set forth in claim 23 wherein said first end of said apparatus is located adjacent a posterior side of the spinal column and said second end of said apparatus is located adjacent an anterior side of the spinal column when said apparatus is inserted between the first and second vertebrae.
31. An apparatus as set forth in claim 23 further including a resilient core having a first surface and a second surface;
a first retaining device connected to said first surface of said resilient core, said first retaining device having said outer surface engageable with the first vertebra of the spinal column and an inner surface facing said first surface of said resilient core; and a second retaining device connected to said second surface of said resilient core, said second retaining device having an outer surface engageable with a second vertebra of the spinal column and an inner surface facing said second surface of said resilient core.
32. An apparatus as set forth in claim 31 wherein said inner surfaces of said first and second retaining devices are connected to said first and second surfaces of said resilient core.
33. An apparatus as set forth in claim 32 wherein at least a portion of said inner surfaces of said first and second retaining devices are spaced from said first and second surfaces of said resilient core.
34. An apparatus as set forth in claim 33 wherein said portions of said inner surfaces of said first and second retaining devices that are spaced from said first and second surfaces of said resilient core are centrally located on said first and second retaining devices.
35. An apparatus as defined in claim 31 wherein said first retaining device includes a first mounting member and a first retaining member, said first retaining member having said outer surface engageable with the first vertebra and an inner surface affixed to said first surface of said core, said first mounting member including an inner surface facing said core and spaced from said first surface of said core.
36. An apparatus as defined in claim 35 wherein said first retaining member has an opening extending through said inner and outer surfaces of said first retaining member, said first mounting member being located in said opening.
37. An apparatus as defined in claim 36 wherein said opening extends axially through said first retaining member.
38. An apparatus as defined in claim 35 wherein said first mounting member is connected to said first retaining member.
39. An apparatus as defined in claim 38 wherein said first mounting member is prevented from moving relative to said first retaining member.
40. An apparatus as defined in claim 23 further including a second rail extending from said outer surface, said second rail having a length extending generally transverse to said first rail.
41. An apparatus for replacing a spinal disc in a spinal column, said apparatus comprising:
a first end;
a second opposite end;
first and second lateral sides extending between said first and second ends;
an outer surface engageable with a first vertebra of the spinal column;
a first projection extending from said outer surface and engageable with the first vertebra to connect said apparatus to the first vertebra, said first projection extending from said outer surface a first distance; and a second projection extending from said outer surface and engageable with the first vertebra to connect said apparatus to the first vertebra, said second projection being located closer to said second end than said first projection, said second projection extending from said outer surface a second distance greater than said first distance.
42. An apparatus as set forth in claim 41 wherein said first projection has a first surface facing outward and toward said first end and a second surface facing outward and toward said second end, said first projection including first and second lateral surfaces facing outward and toward said first and second lateral sides, said first projection including an upper surface extending generally parallel to said outer surface.
43. An apparatus as set forth in claim 42 wherein said second projection has a first surface facing outward and toward said first end and a second surface facing outward and toward said second end, said second projection including first and second lateral surfaces facing outward and toward said first and second lateral sides, said second projection including an upper surface extending generally parallel to said outer surface.
44. An apparatus as set forth in claim 41 wherein said first end of said apparatus is located adjacent a posterior side of the spinal column and said second end of said apparatus is located adjacent an anterior side of the spinal column when said apparatus is inserted between the first and second vertebrae.
45. An apparatus as set forth in claim 41 further including a resilient core having a first surface and a second surface;
a first retaining device connected to said first surface of said resilient core, said first retaining device having said outer surface engageable with the first vertebra of the spinal column and an inner surface facing said first surface of said resilient core; and a second retaining device connected to said second surface of said resilient core, said second retaining device having an outer surface engageable with a second vertebra of the spinal column and an inner surface facing said second surface of said resilient core.
46. An apparatus as set forth in claim 45 wherein said inner surfaces of said first and second retaining devices are connected to said first and second surfaces of said resilient core.
47. An apparatus as set forth in claim 46 wherein at least a portion of said inner surfaces of said first and second retaining devices are spaced from said first and second surfaces of said resilient core.
48. An apparatus as set forth in claim 47 wherein said portions of said inner surfaces of said first and second retaining devices that are spaced from said first and second surfaces of said resilient core are centrally located on said first and second retaining devices.
49. An apparatus as defined in claim 47 wherein said first retaining device includes a first mounting member and a first retaining member, said first retaining member having said outer surface engageable with the first vertebra and an inner surface affixed to said first surface of said core, said first mounting member including an inner surface facing said core and spaced from said first surface of said core.
50. An apparatus as defined in claim 49 wherein said first retaining member has an opening extending through said inner and outer surfaces of said first retaining member, said first mounting member being located in said opening.
51. An apparatus as defined in claim 50 wherein said opening extends axially through said first retaining member.
52. An apparatus as defined in claim 49 wherein said first mounting member is connected to said first retaining member.
53. An apparatus as defined in claim 53 wherein said first mounting member is prevented from moving relative to said first retaining member.
54. An apparatus as defined in claim 41 further including first and second rails extending from said outer surface, said first rail having a length extending generally transverse to said first and second ends, said second rail having a length extending generally transverse to said first rail.
55. An apparatus for replacing a spinal disc in a spinal column, said apparatus comprising:
a first end;
a second opposite end;
first and second lateral sides extending between said first and second ends;
an outer surface engageable with a first vertebra of the spinal column; and first and second rails extending from said outer surface, said first rail having a length extending generally transverse to said first and second ends, said second rail having a length extending generally transverse to said first rail.
56. An apparatus as set forth in claim 55 wherein said first and second rails have lengths extending generally perpendicular to each other.
57. An apparatus as set forth in claim 55 wherein said first rail extends from said outer surface a first distance and said second rail extends from said outer surface a second distance that is smaller than said first distance.
58. An apparatus as set forth in claim 55 wherein said first rail includes a recess for providing bony ingrowth.
59. An apparatus as set forth in claim 55 wherein said first rail includes a plurality of projections extending from said outer surface.
60. An apparatus as set forth in claim 59 wherein a first projection of said first rail extends from said outer surface a distance greater than a second projection of said first rail located closer to said second end extends from said outer surface.
61. An apparatus as set forth in claim 59 wherein a first projection of said first rail has a first surface facing outward and toward said first end and a second surface facing outward and toward said second end, said first projection including first and second lateral surfaces facing outward and toward said first and second lateral sides, said first projection including an upper surface extending generally parallel to said outer surface.
62. An apparatus as set forth in claim 55 further including a third rail extending from said outer surface engageable with the first vertebra to connect said apparatus to the first vertebra, said third rail extending generally parallel to said first rail.
63. An apparatus as set forth in claim 62 wherein said third rail extends from said outer surface a distance greater than said first rail extends from said outer surface.
64. An apparatus as set forth in claim 63 wherein said third rail is located closer to said first lateral side than said first rail.
65. An apparatus as set forth in claim 60 wherein said first end of said apparatus is located adjacent a posterior side of the spinal column and said second end of said apparatus is located adjacent an anterior side of the spinal column when said apparatus is inserted between the first and second vertebrae.
66. An apparatus as set forth in claim 55 further including a resilient core having a first surface and a second surface;
a first retaining device connected to said first surface of said resilient core, said first retaining device having said outer surface engageable with the first vertebra of the spinal column and an inner surface facing said first surface of said resilient core; and a second retaining device connected to said second surface of said resilient core, said second retaining device having an outer surface engageable with a second vertebra of the spinal column and an inner surface facing said second surface of said resilient core.
67. An apparatus as set forth in claim 66 wherein said inner surfaces of said first and second retaining devices are connected to said first and second surfaces of said resilient core.
68. An apparatus as set forth in claim 67 wherein at least a portion of said inner surfaces of said first and second retaining devices are spaced from said first and second surfaces of said resilient core.
69. An apparatus as set forth in claim 68 wherein said portions of said inner surfaces of said first and second retaining devices that are spaced from said first and second surfaces of said resilient core are centrally located on said first and second retaining devices.
70. An apparatus as defined in claim 66 wherein said first retaining device includes a first mounting member and a first retaining member, said first retaining member having an inner surface affixed to said first surface of said core, said first mounting member including an inner surface facing said core and spaced from said first surface of said core.
71. An apparatus as defined in claim 70 wherein said first retaining member has an opening extending through said inner and outer surfaces of said first retaining member, said first mounting member being located in said opening.
72. An apparatus as defined in claim 71 wherein said opening extends axially through said first retaining member.
73. An apparatus as defined in claim 71 wherein said first mounting member is connected to said first retaining member.
74. An apparatus as defined in claim 73 wherein said first mounting member is prevented from moving relative to said first retaining member.
75. An apparatus as defined in claim 70 wherein said mounting member includes said first and second rails.
CA2591326A 2004-12-06 2005-12-06 Method and apparatus for replacing a spinal disc Expired - Fee Related CA2591326C (en)

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US60/633,620 2004-12-06
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WO2006062960A2 (en) 2006-06-15
CA2591326C (en) 2011-08-09
JP2008522737A (en) 2008-07-03
US7850697B2 (en) 2010-12-14
WO2006062960A3 (en) 2006-09-28
CN101111208A (en) 2008-01-23
KR20070093989A (en) 2007-09-19
AU2005314224B2 (en) 2009-10-08
CN101111208B (en) 2014-03-26
AU2010200083A1 (en) 2010-01-28
EP1824430A2 (en) 2007-08-29
KR100939507B1 (en) 2010-02-03
EP1824430A4 (en) 2012-10-24
AU2005314224A1 (en) 2006-06-15
JP5080981B2 (en) 2012-11-21
US20060149273A1 (en) 2006-07-06
AU2010200083B2 (en) 2012-09-13

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