WO2000072770B1 - Shape-memory coupling especially for spinal fixator - Google Patents

Shape-memory coupling especially for spinal fixator

Info

Publication number
WO2000072770B1
WO2000072770B1 PCT/US2000/014568 US0014568W WO0072770B1 WO 2000072770 B1 WO2000072770 B1 WO 2000072770B1 US 0014568 W US0014568 W US 0014568W WO 0072770 B1 WO0072770 B1 WO 0072770B1
Authority
WO
WIPO (PCT)
Prior art keywords
slot
coupling element
segments
shape
longitudinal axis
Prior art date
Application number
PCT/US2000/014568
Other languages
French (fr)
Other versions
WO2000072770A1 (en
Inventor
Jeff R Justis
Original Assignee
Sdgi Holdings Inc
Jeff R Justis
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 Sdgi Holdings Inc, Jeff R Justis filed Critical Sdgi Holdings Inc
Priority to AU52949/00A priority Critical patent/AU767908B2/en
Priority to EP00937826A priority patent/EP1187569A1/en
Priority to JP2000620885A priority patent/JP4240820B2/en
Priority to CA002371394A priority patent/CA2371394C/en
Publication of WO2000072770A1 publication Critical patent/WO2000072770A1/en
Publication of WO2000072770B1 publication Critical patent/WO2000072770B1/en

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
    • A61B17/7035—Screws or hooks, wherein a rod-clamping part and a bone-anchoring part can pivot relative to each other
    • A61B17/7037—Screws or hooks, wherein a rod-clamping part and a bone-anchoring part can pivot relative to each other wherein pivoting is blocked when the rod is clamped
    • 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
    • A61B17/7032—Screws or hooks with U-shaped head or back through which longitudinal rods pass
    • 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
    • A61B17/7035—Screws or hooks, wherein a rod-clamping part and a bone-anchoring part can pivot relative to each other
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
    • F16B2200/00—Constructional details of connections not covered for in other groups of this subclass
    • F16B2200/77—Use of a shape-memory material
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S606/00—Surgery
    • Y10S606/907—Composed of particular material or coated
    • Y10S606/911—Memory material

Landscapes

  • Health & Medical Sciences (AREA)
  • Orthopedic Medicine & Surgery (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Neurology (AREA)
  • Surgery (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Engineering & Computer Science (AREA)
  • Biomedical Technology (AREA)
  • Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
  • Medical Informatics (AREA)
  • Molecular Biology (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Surgical Instruments (AREA)
  • Prostheses (AREA)
  • Details Of Measuring And Other Instruments (AREA)

Abstract

An advanced coupling device (16) using shape-memory technology. The coupling device (16) includes a coupling element (18) defining a longitudinal passage extending therethrough, the passage bounded by a side wall (42) having a first end (42a) and an opposing second end (42b), the side wall (42) defining a first slot (62a) extending from the first end (42a) toward the second end (42b), and a second slot (62b) extending from the second end (42b) toward the first end (42a), and wherein a portion of the second slot (62b) is positioned proximately adjacent and longitudinally overlapping a portion of the first slot (62a). The device (16) further includes at least one compression element (20) at least partially formed of a shape-memory material and being disposed about at least a portion of the coupling element (18). The compression element (20) has a configuration which contracts about the coupling element (18) and compresses the side wall (42) against a member (12) disposed within the passage to limit movement of the member (12) relative to the coupling element (18).

Claims

AMENDED CLAIMS
[received by the International Bureau on 14 November 2000 (14.1 1.00); original claims 37, 39-41 and 43-47 amended; remaining claims unchanged (4 pages)]
37. A coupling device for connection to a member, comprising: a coupling element defining a longitudinal axis and a passage extending therethrough generally along the longitudinal axis, said coupling element including slot means for rendering said passage collapsible, said slot means comprising a first slot and a second slot, said first slot including a forked portion having first and second prongs, at least a portion of said second slot being positioned intermediate said first and second prongs; and shape-memory means cooperating with said coupling element for allowing movement of the member relative to said coupling element when in one configuration and limiting movement of the member relative to said coupling element when in another configuration.
38. The device of claim 37, wherein the member and said coupling element include means for allowing angular variation therebetween when said shape-memory means is in said one configuration.
39. The device of claim 37, wherein said forked portion has a shape corresponding to a shape of said at least a portion of said second slot.
40. A coupling device for connection to a member, comprising: a coupling element defining a longitudinal axis and including a first longitudinal segment and a second longitudinal segment, said first and second longitudinal segments defining a passage extending through said coupling element generally along the longitudinal axis, said first and second longitudinal segments being connected by a pair of narrow sections of material; and a compression element at least partially formed of a shape-memory material and being disposed about at least a portion of said segments, said compression element having a first configuration and a second memorized configuration, said second configuration contracting about said at least a portion of said segments and compressing said segments against the member to thereby limit movement of the member relative to said coupling element.
41. The device of claim 40, wherein each of said narrow sections of material has first and second edges extending generally along the longitudinal axis.
42. The device of claim 41, wherein said first and second edges are aligned substantially parallel and generally along the longitudinal axis of said coupling element.
43. The device of claim 40, wherein at least one of said narrow sections of material is substantially U-shaped.
44. The device of claim 43, wherein said at least one of said narrow sections of material has an inner edge and an outer edge, said inner and outer edges being aligned generally along the longitudinal axis of said coupling element.
45. The device of claim 40, wherein said pair of narrow sections of material are positioned generally opposite one another.
46. The device of claim 45, wherein said first and second longitudinal segments are longitudinal halves.
47. The device of claim 41, wherein said coupling element has a first end and an opposing second end, said first edge extending from said first end and terminating at a location adjacent said second end, said second edge extending from said second end and terminating at a location adjacent said first end.
48. A coupling device for connection to a member, comprising: a coupling element defining a longitudinal axis and a passage extending therethrough generally along the a longitudinal axis, said passage being bounded by a side wall having a first end and a second end, said side wall defining a first slot and a second slot, said first slot extending from said first end and including first and second segments extending toward said second end, said second slot extending from said second end toward said first end and being at least partially positioned intermediate said first and second segments of said first slot; and a compression element at least partially formed of a shape-memory material and being disposed about said coupling element, said compression element having a first configuration and a second memorized configuration, said second configuration contracting about said coupling element and compressing said side wall against the member to thereby limit movement of the member relative to said coupling element.
49. The device of claim 48, wherein a portion of said second slot is positioned proximately adjacent and longitudinally overlapping a portion of each of said first and second segments of said first slot.
50. The device of claim 48, wherein said first and second segments of said first slot are aligned generally along the longitudinal axis of said coupling element.
51. The device of claim 48, wherein said first slot includes a first portion extending from said first end and a second portion in communication with said first portion and extending toward said second end, said second portion defining said first and second segments.
52. The device of claim 51, wherein said second portion of said first slot is substantially U-shaped.
53. The device of claim 51, wherein said second slot terminates at a location adjacent a base of said second portion of said first slot, and wherein said first and second segments of said first slot terminate at a location adjacent said second end.
54. The device of claim 48, wherein said second slot has a narrow end opening at said second end and a wide end positioned intermediate said first and second segments so as to define a tear drop shape.
55. The device of claim 48, wherein said side wall defines a second pair of slots configured substantially similar to and positioned generally opposite said first and second slots.
56. The device of claim 48, wherein said first and second configurations of said coupling element occur at different temperatures.
57. The device of claim 48, wherein said shape-memory material exhibits a stress-induced martensite behavior, said shape-memory material having a stress-induced martensitic state, said shape-memory material being in said stress- induced martensitic state when said coupling element is in said first configuration.
PCT/US2000/014568 1999-05-28 2000-05-25 Shape-memory coupling especially for spinal fixator WO2000072770A1 (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
AU52949/00A AU767908B2 (en) 1999-05-28 2000-05-25 Shape-memory coupling especially for spinal fixator
EP00937826A EP1187569A1 (en) 1999-05-28 2000-05-25 Shape-memory coupling especially for spinal fixator
JP2000620885A JP4240820B2 (en) 1999-05-28 2000-05-25 Bonding device using shape memory material
CA002371394A CA2371394C (en) 1999-05-28 2000-05-25 Shape-memory coupling especially for spinal fixator

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
US13667899P 1999-05-28 1999-05-28
US60/136,678 1999-05-28
US09/408,197 US6254602B1 (en) 1999-05-28 1999-09-29 Advanced coupling device using shape-memory technology
US09/408,197 1999-09-29

Publications (2)

Publication Number Publication Date
WO2000072770A1 WO2000072770A1 (en) 2000-12-07
WO2000072770B1 true WO2000072770B1 (en) 2001-02-08

Family

ID=26834538

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2000/014568 WO2000072770A1 (en) 1999-05-28 2000-05-25 Shape-memory coupling especially for spinal fixator

Country Status (6)

Country Link
US (1) US6254602B1 (en)
EP (1) EP1187569A1 (en)
JP (1) JP4240820B2 (en)
AU (1) AU767908B2 (en)
CA (1) CA2371394C (en)
WO (1) WO2000072770A1 (en)

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WO2000072770A1 (en) 2000-12-07
CA2371394C (en) 2008-08-26
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