CA2484923A1 - Dynamic fixation device and method of use - Google Patents

Dynamic fixation device and method of use Download PDF

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Publication number
CA2484923A1
CA2484923A1 CA002484923A CA2484923A CA2484923A1 CA 2484923 A1 CA2484923 A1 CA 2484923A1 CA 002484923 A CA002484923 A CA 002484923A CA 2484923 A CA2484923 A CA 2484923A CA 2484923 A1 CA2484923 A1 CA 2484923A1
Authority
CA
Canada
Prior art keywords
vertebra
dynamic fixation
fixation device
rod member
spine
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
CA002484923A
Other languages
French (fr)
Other versions
CA2484923C (en
Inventor
Stephen Ritland
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of CA2484923A1 publication Critical patent/CA2484923A1/en
Application granted granted Critical
Publication of CA2484923C publication Critical patent/CA2484923C/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • 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
    • 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
    • A61B17/7001—Screws or hooks combined with longitudinal elements which do not contact vertebrae
    • A61B17/7002—Longitudinal elements, e.g. rods
    • A61B17/7019—Longitudinal elements having flexible parts, or parts connected together, such that after implantation the elements can move relative to each other
    • A61B17/7026—Longitudinal elements having flexible parts, or parts connected together, such that after implantation the elements can move relative to each other with a part that is flexible due to its form
    • 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
    • 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
    • A61B17/7001—Screws or hooks combined with longitudinal elements which do not contact vertebrae
    • A61B17/7002—Longitudinal elements, e.g. rods
    • A61B17/7011—Longitudinal element being non-straight, e.g. curved, angled or branched
    • 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
    • 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
    • A61B17/7001—Screws or hooks combined with longitudinal elements which do not contact vertebrae
    • A61B17/7002—Longitudinal elements, e.g. rods
    • A61B17/7019—Longitudinal elements having flexible parts, or parts connected together, such that after implantation the elements can move relative to each other
    • A61B17/7023—Longitudinal elements having flexible parts, or parts connected together, such that after implantation the elements can move relative to each other with a pivot joint
    • 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
    • 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
    • A61B17/7001—Screws or hooks combined with longitudinal elements which do not contact vertebrae
    • A61B17/7002—Longitudinal elements, e.g. rods
    • 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
    • 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
    • A61B17/7001—Screws or hooks combined with longitudinal elements which do not contact vertebrae
    • A61B17/7002—Longitudinal elements, e.g. rods
    • A61B17/7004—Longitudinal elements, e.g. rods with a cross-section which varies along its length
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
    • A61B2017/00004—(bio)absorbable, (bio)resorbable, resorptive
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
    • A61B2017/00526—Methods of manufacturing
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
    • A61B2017/00831—Material properties
    • A61B2017/00867—Material properties shape memory effect

Abstract

A dynamic fixation device is provided that allows the vertebrae to which it is attached to move in flexion within the normal physiological limits of motion, while also providing structural support that limits the amount of translation motion beyond normal physiological limits. The present invention includes a flexible portion and two ends that are adapted for connection to pedicle screws. In at least one embodiment of the present invention, the normal axis of rotation of the vertebrae is substantially duplicated by the dynamic fixation device. The flexible portion of the dynamic fixation device can include a geometric shape and/or a hinge portion.

Claims (20)

1. An implant device for flexibly linking at least two lumbar vertebra of a spine of a patient using two connectors and two pedicle screws, comprising:
a rod having a first end and second end, said first end interconnected to a first of the pedicle screws using a first of the two connectors, and said second end interconnected to a second of the pedicle screws using a second of the two connectors; and a geometric shaped portion positioned between said first end and said second end, wherein said geometric shaped portion elongates during flexion of the spine.
2. The implant device as claimed in claim 1, wherein said geometric shaped portion includes four arms situated at about 90 degrees to each other when said device is in a neutral position.
3. The implant device as claimed in claim 2, wherein said four arms are within a plane substantially parallel to the direction of rotation in flexion.
4. The implant device as claimed in claim 2, wherein said four arms are within a plane substantially perpendicular to the direction of rotation in flexion.
5. The implant device as claimed in claim 1, wherein said geometric shaped portion rotates about a point that substantially mimics the axis of rotation of the vertebra to which said device is attached.
6. An implant assembly for flexibly linking a first vertebra of a spine to a second vertebra of the spine of a patient, comprising:
a rod member including at least one geometric shaped portion having a perimeter wall and a hollow interior region, said perimeter wall having an interior surface comprising a sloped face, wherein said sloped face is oriented at an angle, said angle less than about 90 degrees relative to a plane aligned with the posterior side of the geometric shaped portion;
means for attaching said rod member to the first vertebra and the second vertebra;
wherein said geometric shaped portion permits flexion of the vertebra when the patient bends their spine.
7. The device as claimed in claim 6, wherein said sloped face has an angle of between about 45 to 90 degrees.
8. The device as claimed in claim 6, wherein said device comprises a metal alloy.
9. The device as claimed in claim 6, wherein said means for attaching comprises at least one rod connector and at least one pedicle screw.
10. A dynamic fixation device for flexibly linking a first vertebra of a spine to a second vertebra of the spine of a patient, comprising:
a first rod member having a posterior surface;
a second rod member having an anterior surface wherein at least a portion of said anterior surface is oriented opposing at least a portion of said posterior surface of said first rod member;
a spring situated between said at least a portion of said anterior surface and said at least a portion of said posterior surface;
means for interconnecting said first rod member to said second rod member; and means for attaching said first rod member to the first vertebra and attaching said second rod member to the second vertebra.
11. The dynamic fixation device as claimed in claim 10, wherein said means for interconnecting comprises a pin.
12. The dynamic fixation device as claimed in claim 10, wherein said means for interconnecting comprises a plate.
13. The dynamic fixation device as claimed in claim 10, wherein said means for attaching comprises at least a first connector and at least a first pedicle screw.
14. The dynamic fixation device as claimed in claim 10, wherein said spring is positioned within a confinement zone between said first rod member and said second rod member.
15. The dynamic fixation device as claimed in claim 10, wherein said at least a portion of said posterior surface is concave in shape.
16. The dynamic fixation device as claimed in claim 10, wherein said at least a portion of said anterior surface is concave in shape.
17. The dynamic fixation device as claimed in claim 10, wherein said spring is circular in cross section when not in compression.
18. A dynamic fixation device comprising:
(a) at least two vertebra attachment points;
(b) at least two rod members operatively associated with said attachment points and further operatively associated with each other in a manner to accommodate a natural physiologic motion of two adjacent vertebra when said vertebra are undergoing flexion.
19. The dynamic fixation device as claimed in claim 18, wherein said attachment points comprise pedicle screws.
20. The dynamic fixation device as claimed in claim 18, wherein said rod members are hingedly connected to each other.
CA2484923A 2002-05-08 2003-05-08 Dynamic fixation device and method of use Expired - Fee Related CA2484923C (en)

Applications Claiming Priority (7)

Application Number Priority Date Filing Date Title
US37916702P 2002-05-08 2002-05-08
US60/379,167 2002-05-08
US39018102P 2002-06-19 2002-06-19
US60/390,181 2002-06-19
US41772202P 2002-10-09 2002-10-09
US60/417,722 2002-10-09
PCT/US2003/014615 WO2003094699A2 (en) 2002-05-08 2003-05-08 Dynamic fixation device and method of use

Publications (2)

Publication Number Publication Date
CA2484923A1 true CA2484923A1 (en) 2003-11-20
CA2484923C CA2484923C (en) 2011-02-22

Family

ID=29424521

Family Applications (1)

Application Number Title Priority Date Filing Date
CA2484923A Expired - Fee Related CA2484923C (en) 2002-05-08 2003-05-08 Dynamic fixation device and method of use

Country Status (7)

Country Link
US (8) US7682375B2 (en)
EP (3) EP2457528A1 (en)
JP (1) JP4559848B2 (en)
AT (1) ATE552789T1 (en)
AU (2) AU2003228960B2 (en)
CA (1) CA2484923C (en)
WO (1) WO2003094699A2 (en)

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WO2003094699A3 (en) 2009-05-14
AU2003228960B2 (en) 2009-06-11
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US9232967B2 (en) 2016-01-12
US9918744B2 (en) 2018-03-20
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US20040002708A1 (en) 2004-01-01
US8585739B2 (en) 2013-11-19
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US20140180339A1 (en) 2014-06-26
US20160331411A1 (en) 2016-11-17
US8685062B2 (en) 2014-04-01
ATE552789T1 (en) 2012-04-15
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US20150073480A1 (en) 2015-03-12
US20100160969A1 (en) 2010-06-24

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