CA2540591A1 - Device for the elastic stabilisation of bodies of the vertebra - Google Patents

Device for the elastic stabilisation of bodies of the vertebra Download PDF

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Publication number
CA2540591A1
CA2540591A1 CA002540591A CA2540591A CA2540591A1 CA 2540591 A1 CA2540591 A1 CA 2540591A1 CA 002540591 A CA002540591 A CA 002540591A CA 2540591 A CA2540591 A CA 2540591A CA 2540591 A1 CA2540591 A1 CA 2540591A1
Authority
CA
Canada
Prior art keywords
spring
longitudinal axis
elastic means
different
coils
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
CA002540591A
Other languages
French (fr)
Other versions
CA2540591C (en
Inventor
Stephan Hartmann
Armin Studer
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.)
Synthes USA LLC
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 CA2540591A1 publication Critical patent/CA2540591A1/en
Application granted granted Critical
Publication of CA2540591C publication Critical patent/CA2540591C/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
    • 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
    • A61B17/60—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 for external osteosynthesis, e.g. distractors, contractors
    • A61B17/64—Devices extending alongside the bones to be positioned
    • 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
    • A61B17/60—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 for external osteosynthesis, e.g. distractors, contractors
    • A61B17/66—Alignment, compression or distraction mechanisms
    • 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
    • A61B17/7028—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 the flexible part being a coil spring
    • 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
    • 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

Abstract

A device (1) for the elastic stabilisation of bodies of the vertebra with A) at least two bone anchoring means (2), each of them having a central axis (3) and a head segment (4), and B) elastic means (5), which have a longitudinal axis (12) and can be joined with the head segments (4) of two adjacent bone anchoring means (2) in such a manner, that the longitudinal axis (12) extends transversely to the central axes (3), while C) under compressive load the elastic means (5) have a progressive spring characteristics (20), wherein D) the elastic means is manufactured from a metallic material, and E) comprise spring coils (19), of which at least two spring coils (19) have a geometric dimension which is different.

Claims (18)

1. A device (1) for the elastic stabilisation of bodies of the vertebra with A) at least two bone anchoring means (2), each of them having a central axis (3) and a head segment (4), and B) elastic means (5), which have a longitudinal axis (12) and can be joined with the head segments (4) of two adjacent bone anchoring means (2) in such a manner, that the longitudinal axis (25) extends transversely to the central axes (3), while C) under compressive load the elastic means (5) have a progressive spring characteristics (20), characterised in that D) the elastic means (5) is manufactured from a metallic material, and E) comprise spring coils (19), of which at least two spring coils (19) have at least one geometric dimension which is different.
2. A device (1) according to claim 1, characterised in that the spring characteristics (20) of the elastic means (5) has a continuous force-travel diagram.
3. A device (1) according to claim 3, characterised in that the elastic means (5) is constructed as a helical spring (11) with a varying pitch 8 of the spring coils (19).
4. A device (1) according to claim 3, characterised in that measured parallel to the longitudinal axis (12) the helical spring (11) has a slot with a different width x at least between two adjacent spring coils (10).
5. A device (1) according to claim 3 or 4, characterised in that the helical spring (11) is manufactured from a spring material, the cross-sectional area (13) of which is perpendicular to the longitudinal axis (12) and when measured parallel to the longitudinal axis have different heights h at least between two adjacent spring coils (19).
6. A device (1) according to claim 1, characterised in that the elastic means (5) are constructed as a flat, meander-shaped spring (29) with a plurality of spring coils (19) provided successively along to the longitudinal axis (12).
7. A device (1) according to claim 6, characterised in that each coil (19) has an inflecting loop (21) with an axis (24) of bending.
8. A device (1) according to claim 7, characterised in that the distances L
between the axes (24) of bending and the longitudinal axis (12) are constant on both sides of the longitudinal axis (12).
9. A device (1) according to claim 7, characterised in that the distance L1 between the at least one axis (24a) of bending, provided on the left side of the longitudinal axis (12) and the longitudinal axis (12) and the distance L2 between the at least one axis (24b) of bending, provided on the right side of the longitudinal axis (12), and the longitudinal axis (12) are different.
10. A device (1) according to any one of claims 6 to 9, characterised in that each spring coil (19) comprises restraining means (22) which limit the allowable spring travel of the relevant spring coil (19).
11. A device (1) according to claim 10, characterised in that the restraining means (22) comprise at feast one lug (23) per spring coil (19), that limits the spring travel s of the relevant spring coil (19).
12. A device (1) according to claim 11, characterised in that the spring travel s, limited by at least one lug (23), is different for at least two spring coils (19).
13. A device (1) according to any one of claims 6 to 12, characterised in that the spring characteristics of the meander-shaped spring (29) comprises n number of spring coils (19) and it has a different spring characteristic i for each spring coil (19), while i1<i j<i n.
14. A device (1) according to any one of claims 7 to 13, characterised in that the wall thickness of the spring material is different at least between two inflecting loops (21).
15. A device (1) according to any one of claims 1 to 14, characterised in that the elastic means (5) comprise at their ends (3, 4) connecting parts (16), which are suitable for the fixing of the elastic means (5) on the bone anchoring means (2).
16. A device (1) according to claim 15, characterised in that at least one connecting part (16a) is a rod (8) that is coaxial with the longitudinal axis (25).
17. A device (1) according to claim 15 or 16, characterised in that at least one connecting part (16b) is a sleeve (17) with a central bore (18) that is coaxial with the longitudinal axis (12).
18. A device (1) according to any one of claims 15 to 17, characterised in that at least one connecting part (16) comprises a hinged joint.
CA2540591A 2003-09-29 2003-09-29 Device for the elastic stabilisation of bodies of the vertebra Expired - Fee Related CA2540591C (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/CH2003/000647 WO2005030066A1 (en) 2003-09-29 2003-09-29 Device for elastically stabilising vertebral bodies

Publications (2)

Publication Number Publication Date
CA2540591A1 true CA2540591A1 (en) 2005-04-07
CA2540591C CA2540591C (en) 2011-06-28

Family

ID=34383939

Family Applications (1)

Application Number Title Priority Date Filing Date
CA2540591A Expired - Fee Related CA2540591C (en) 2003-09-29 2003-09-29 Device for the elastic stabilisation of bodies of the vertebra

Country Status (14)

Country Link
US (1) US8012178B2 (en)
EP (1) EP1667591B1 (en)
JP (1) JP4932254B2 (en)
KR (1) KR101026942B1 (en)
CN (1) CN100435746C (en)
AR (1) AR045758A1 (en)
AT (1) ATE434983T1 (en)
AU (1) AU2003264224B2 (en)
BR (1) BR0318489B1 (en)
CA (1) CA2540591C (en)
DE (1) DE50311676D1 (en)
ES (1) ES2325989T3 (en)
NZ (1) NZ546110A (en)
WO (1) WO2005030066A1 (en)

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US20030220643A1 (en) * 2002-05-24 2003-11-27 Ferree Bret A. Devices to prevent spinal extension

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JP2007506458A (en) 2007-03-22
JP4932254B2 (en) 2012-05-16
AU2003264224A1 (en) 2005-04-14
US8012178B2 (en) 2011-09-06
EP1667591B1 (en) 2009-07-01
KR101026942B1 (en) 2011-04-04
US20060260483A1 (en) 2006-11-23
AR045758A1 (en) 2005-11-09
KR20060101461A (en) 2006-09-25
AU2003264224B2 (en) 2008-12-04
ATE434983T1 (en) 2009-07-15
CA2540591C (en) 2011-06-28
CN100435746C (en) 2008-11-26
EP1667591A1 (en) 2006-06-14
BR0318489A (en) 2006-09-12
CN1838918A (en) 2006-09-27
WO2005030066A1 (en) 2005-04-07
DE50311676D1 (en) 2009-08-13
NZ546110A (en) 2009-04-30
ES2325989T3 (en) 2009-09-28
BR0318489B1 (en) 2012-05-02

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