WO2003003901B1 - Method and apparatus for correcting spinal deformity - Google Patents

Method and apparatus for correcting spinal deformity

Info

Publication number
WO2003003901B1
WO2003003901B1 PCT/US2002/020073 US0220073W WO03003901B1 WO 2003003901 B1 WO2003003901 B1 WO 2003003901B1 US 0220073 W US0220073 W US 0220073W WO 03003901 B1 WO03003901 B1 WO 03003901B1
Authority
WO
WIPO (PCT)
Prior art keywords
platform
anchors
cable
vertebral bodies
extending
Prior art date
Application number
PCT/US2002/020073
Other languages
French (fr)
Other versions
WO2003003901A3 (en
WO2003003901A2 (en
Inventor
Isador H Lieberman
Original Assignee
Cleveland Clinic Foundation
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Cleveland Clinic Foundation filed Critical Cleveland Clinic Foundation
Priority to AU2002322310A priority Critical patent/AU2002322310A1/en
Publication of WO2003003901A2 publication Critical patent/WO2003003901A2/en
Publication of WO2003003901A3 publication Critical patent/WO2003003901A3/en
Publication of WO2003003901B1 publication Critical patent/WO2003003901B1/en

Links

Classifications

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    • A61F2230/00—Geometry of prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof
    • A61F2230/0063—Three-dimensional shapes
    • A61F2230/0091—Three-dimensional shapes helically-coiled or spirally-coiled, i.e. having a 2-D spiral cross-section
    • 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
    • A61F2250/00—Special features of prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof
    • A61F2250/0014—Special features of prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof having different values of a given property or geometrical feature, e.g. mechanical property or material property, at different locations within the same prosthesis
    • A61F2250/0036—Special features of prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof having different values of a given property or geometrical feature, e.g. mechanical property or material property, at different locations within the same prosthesis differing in thickness
    • 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
    • A61F2250/00—Special features of prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof
    • A61F2250/0014—Special features of prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof having different values of a given property or geometrical feature, e.g. mechanical property or material property, at different locations within the same prosthesis
    • A61F2250/0037—Special features of prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof having different values of a given property or geometrical feature, e.g. mechanical property or material property, at different locations within the same prosthesis differing in height or in length
    • 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
    • A61F2310/00—Prostheses classified in A61F2/28 or A61F2/30 - A61F2/44 being constructed from or coated with a particular material
    • A61F2310/00005—The prosthesis being constructed from a particular material
    • A61F2310/00011—Metals or alloys
    • A61F2310/00017—Iron- or Fe-based alloys, e.g. stainless steel
    • 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
    • A61F2310/00—Prostheses classified in A61F2/28 or A61F2/30 - A61F2/44 being constructed from or coated with a particular material
    • A61F2310/00005—The prosthesis being constructed from a particular material
    • A61F2310/00011—Metals or alloys
    • A61F2310/00023—Titanium or titanium-based alloys, e.g. Ti-Ni alloys

Abstract

An apparatus (10) for correcting spinal deformity comprises at least one anchor (20) for implantation into a vertebral body (90). The anchor (20) includes a platform (24) having a first surface (38) for facing the vertebral body (90). The anchor (20) further includes screw means (50 and 52) for embedding into the vertebral body (90) upon rotation of the platform (24). The platform (24) includes at least one passage (44) extending transversely through the platform. The passage (44) receives a cable (120) connected with another anchor (20) in another vertebral body (92). The cable (120) is tensioned to cause relative movement between the vertebral bodies (90 and 92) and thereby correct the spinal deformity. Additional cables (150, 170) may be connected to the anchors (20) and tensioned to achieve correction in multiple planes.

Claims

AMENDED CLAIMS[received by the International Bureau on 15 July 2003 (15.07.03) original claims 1 to 41 have been amended by claims 1 to 38-61-
1. An apparatus for correcting spinal deformity, said apparatus comprising: at least one anchor for implantation into a vertebral body, said at least one anchor, when implanted, being resistant to toggling in the vertebral body and to being pulled from the vertebral body; said at least one anchor including a platform having a first surface for facing the vertebral body, said platform including at least one passage extending transversely through said platform, said at least one passage for receiving a cable connected with another vertebral body; said at least one anchor further including at least one helical spike for embedding into the vertebral body upon rotation of said platform, said at least one helical spike projecting from said first surface on said platform and extending around a longitudinal axis, said at least one helical spike having a tip portion at a distal end which penetrates into the vertebral body as said platform is rotated; said platform including a plurality of parallel passages extending transversely through said platform and an oppositely disposed pair of radially extending wing sections, one of said plurality of parallel passages extending through each of said pair of wing sections.
2. The apparatus of claim 1 further comprising at least one cable extending through one of said plurality of parallel passages in said platform.
3. The apparatus of claim 2 wherein said at least one anchor comprises first and second anchors for implanting in first and second vertebral bodies, respectively, said at least one cable extending through a respective one of said plurality of parallel passages in said platform of each of said first and second anchors, said at least one cable being tensionable to cause relative movement between the first and second vertebral bodies.
4. The apparatus of claim 3 wherein said platform on each of said first and second anchors includes structure for connecting a spinal fixation implant .
5. The apparatus of claim 4 further comprising a spinal fixation implant extending between and connected to said platform on each of said first and second anchors after said at least one cable has been tensioned to effect relative movement between the first and second vertebral bodies.
6. The apparatus of claim 3 wherein said at least one cable includes a primary cable extending between a centrally located one of said plurality of parallel passages in each of said first and second anchors .
7. The apparatus of claim 6 wherein said at least one cable further includes a secondary cable extending between one of said plurality of parallel passages in one of said pair of wing sections on said platform of each of said first and second anchors, said secondary cable being tensionable to cause relative movement between the first and second vertebral bodies in one direction after said primary cable has been tensioned to effect relative movement between the first and second vertebral bodies in another direction.
8. An apparatus for correcting spinal deformity, said apparatus comprising: first and second anchors for implantation into first and second vertebral bodies, respectively, said anchors, when implanted, being resistant to toggling in the vertebral bodies and to being pulled from the vertebral bodies; each of said first and second anchors including a platform having at least one passage extending transversely through said platform; each of said first and second anchors further including screw means for embedding into one of the vertebral bodies upon rotation of said platform, said screw means projecting from said platform on each of said first and second anchors and having a tip portion at a distal end which penetrates into a respective one of the vertebral bodies as said platform is rotated; and at least one cable extending through said at least one passage in said platform on each of said first and second anchors, said at least one cable being tensionable to cause relative movement between the first and second vertebral bodies; said platform on each of said first and second anchors including a plurality of parallel passages extending transversely through said platform; said platform on each of said first and second anchors further including an oppositely disposed pair of radially extending wing sections, one of said plurality of parallel passages extending through each of said pair of wing sections on each of said first and second anchors.
9. The apparatus of claim 8 wherein said platform on each of said first and second anchors includes structure for connecting a spinal fixation implant .
10. The apparatus of claim 9 further comprising a spinal fixation implant extending between to said platform on each of said first and second anchors, said spinal fixation implant being fixedly connected to each of said first and second anchors after said at least one cable has been tensioned to effect relative movement between the first and second vertebral bodies .
11. The apparatus of claim 10 wherein said at least one cable includes a primary cable extending between a centrally located one of said plurality of parallel passages in said platform of each of said first and second anchors.
12. The apparatus of claim 11 wherein said at least one cable further includes a secondary cable extending between one of said plurality of parallel passages in one of said pair of wing sections on said platform of each of said first and second anchors, said secondary cable being tensionable to cause relative movement between the first and second vertebral bodies in one direction after said primary cable has been tensioned to effect relative movement between the first and second vertebral bodies in a another direction.
13. An apparatus for correcting spinal deformity, said apparatus comprising: at least two anchors for implantation into separate vertebral bodies, said at least two anchors, when implanted, being resistant to toggling in the vertebral bodies and to being pulled from the vertebral bodies; each of said at least two anchors including a platform having at least one passage extending transversely through said platform; each of said at least two anchors further including at least two helical spikes for embedding into one of the vertebral bodies upon rotation of said platform, said at least two helical spikes projecting from said platform on each of said at least two anchors and having tip portions at a distal end which penetrate into a respective one of the vertebral bodies as said platform is rotated; at least one cable extending through said at least one passage in said platform on each of said at least two anchors, said at least one cable being tensionable to cause relative movement between the vertebral bodies; and a spinal fixation implant extending between and is connectable with said platform on each of said at least two anchors .
14. The apparatus of claim 13 wherein said platform on each of said at least two anchors includes a plurality of parallel passages extending transversely through said platform.
15. The apparatus of claim 14 wherein said platform on each of said at least two anchors includes an oppositely disposed pair of radially extending wing sections, one of said plurality of parallel passages extending through each of said pair of wing sections on each of said at least two anchors.
16. The apparatus of claim 15 wherein said at least one cable includes a primary cable extending between a centrally located one of said plurality of parallel passages in said platform of each of said at least two anchors.
17. The apparatus of claim 16 wherein said at least one cable further includes a secondary cable extending between one of said plurality of parallel passages in one of said pair of wing sections on said platform of each of said at least two anchors, said secondary cable being tensionable to cause relative movement between the vertebral bodies in one direction after said primary cable has been tensioned to effect relative movement between the vertebral bodies in a another direction.
18. The apparatus of claim 13 wherein each of said at least two anchors has three helical spikes.
19. The apparatus of claim 13 wherein said at least two helical spikes on each of said at least two anchors, when implanted, have a conical shape that increases in diameter as said at least two helical spikes extend away from said platform on each of said at least two anchors.
20. A method for correcting spinal deformity, said method comprising the steps of: providing at least two anchors for implantation into separate vertebral bodies, each of the at least two anchors including a platform having at least one passage extending transversely through the platform, each of the at least two anchors further including screw means for embedding into one of the vertebral bodies upon rotation of the platform; implanting the at least two anchors in the separate vertebral bodies; -70-
connecting the at least two anchors with at least one cable that extends through the at least one passage in the platform on each of the at least two anchors; tensioning the at least one cable to cause relative movement between the vertebral bodies; and connecting a spinal fixation implant to the platform on each of the at least two anchors.
21. A method for correcting spinal deformity, said method comprising the steps of: providing at least two anchors for implantation into separate vertebral bodies, each of the at least two anchors including a platform having at least one passage extending transversely through the platform, each of the at least two anchors further including screw means for embedding into one of the vertebral bodies upon rotation of the platform; implanting the at least two anchors in the separate vertebral bodies; connecting the at least two anchors with at least one cable that extends through the at least one passage in the platform on each of the at least two anchors; and -71-
tensioning the at least one cable to cause relative movement between the vertebral bodies; the platform on each of the at least two anchors including a plurality of parallel passages extending transversely through the platform, the platform on each of the at least two anchors further including an oppositely disposed pair of radially extending wing sections, one of the plurality of parallel passages extending through each of the pair of wing sections on each of the at least two anchors.
22. The method of claim 21 further comprising the steps of: extending a primary cable between a centrally located one of the plurality of parallel passages in the platform of each of the at least two anchors; and tensioning the primary cable to cause relative movement between the vertebral bodies in one direction.
23. The method of claim 22 further comprising the steps of: -72-
extending a secondary cable between one of the plurality of parallel passages in one of the pair of wing sections on the platform of each of the anchors; and tensioning the secondary cable to cause relative movement between the vertebral bodies in another direction.
24. The method of claim 23 further comprising the step of: connecting a spinal fixation implant to the platform on each of the at least two anchors.
25. An apparatus for correcting spinal deformity, said apparatus comprising: at least one anchor for implantation into a vertebral body, said at least one anchor having a longitudinal axis and, when implanted, being resistant to toggling in the vertebral body and to being pulled from the vertebral body; said at least one anchor including a platform having a first surface for facing the vertebral body, said first surface being solid and extending generally transverse to said longitudinal axis, said platform -73-
including at least one passage extending transversely through said platform, said at least one passage for receiving a cable connected with another vertebral body; said at least one anchor further including at least one helical spike for embedding into the vertebral body upon rotation of said platform, said at least one helical spike projecting tangentially from said first surface on said platform and extending around said longitudinal axis, said at least one helical spike having a tip portion at a distal end which penetrates into the vertebral body as said platform is rotated.
26. The apparatus of claim 25 wherein said platform includes a plurality of parallel passages extending transversely through said platform.
27. The apparatus of claim 25 wherein said at least one anchor has a pair of helical spikes extending around said longitudinal axis, said proximal ends of said pair of helical spikes being spaced 180° apart. -74 -
28. The apparatus of claim 25 wherein said at least one anchor has three helical spikes extending around said longitudinal axis, said proximal ends of said helical spikes being spaced 120° apart.
29. The apparatus of claim 25 wherein said first surface on said platform of said at least one anchor has a shape that is complimentary to the shape of an outer surface of the vertebral body for engaging the outer surface of the vertebral body.
30. The apparatus of claim 25 wherein said at least one helical spike, when implanted, has a conical shape that increases in diameter as said at least one helical spike extends away from said platform.
31. The apparatus of claim 25 wherein at least a portion of said at least one helical spike is made of a shape memory alloy that is responsive to changes in temperature above and below a predetermined temperature transition range, said at least one helical spike being in said first condition when the temperature of said at least one helical spike is below said predetermined temperature transition range, said at least one helical -75-
spike being in said second condition when heated above said predetermined temperature transition range, said at least one helical spike being implanted into the vertebral body in said second condition.
32. The apparatus of claim 31 wherein said at least one helical spike further has a connecting portion at a proximal end connected to said platform and an intermediate portion extending between said connecting portion and said tip portion, at least one of said intermediate portion and said tip portion being made of said shape memory alloy.
33. The apparatus of claim 25 wherein said at least one helical spike has a solid cross-section.
34. The apparatus of claim 25 wherein said at least one helical spike has a tubular cross-section.
35. The apparatus of claim 25 wherein a first portion of said at least one helical spike has a solid cross-section and a second portion of said at least one helical spike has a tubular cross-section. -76-
36. An apparatus for correcting spinal deformity, said apparatus comprising: first and second anchors for implantation into first and second vertebral bodies, respectively, said anchors, when implanted, being resistant to toggling in the vertebral bodies and to being pulled from the vertebral bodies; each of said first and second anchors having a longitudinal axis and including a platform having at least one passage extending transversely through said platform, each of said platforms having a first surface that is solid and that extends generally transverse to said longitudinal axis; each of said first and second anchors further including at least two helical spikes for embedding into one of the vertebral bodies upon rotation of said platform, said at least two helical spikes projecting tangentially from said first surface platform on each of said first and second anchors and having a tip portion at a distal end which penetrates into a respective one of the vertebral bodies as said platform is rotated; and -77-
at least one cable extending through said at least one passage in said platform on each of said first and second anchors, said at least one cable being tensionable to cause relative movement between the first and second vertebral bodies.
37. The apparatus of claim 36 wherein said platform on each of said first and second anchors includes a plurality of parallel passages extending transversely through said platform.
38. The apparatus of claim 36 wherein said at least two helical spikes on each of said first and second anchors, when implanted, have a conical shape that increases in diameter as said at least two helical spikes extend away from said platform on each of said first and second anchors.
PCT/US2002/020073 2001-07-05 2002-06-24 Method and apparatus for correcting spinal deformity WO2003003901A2 (en)

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US09/899,669 US6551320B2 (en) 2000-11-08 2001-07-05 Method and apparatus for correcting spinal deformity

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US20020055740A1 (en) 2002-05-09
US6551320B2 (en) 2003-04-22
WO2003003901A2 (en) 2003-01-16
AU2002322310A1 (en) 2003-01-21

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