CA2056253A1 - Anchoring Device - Google Patents

Anchoring Device

Info

Publication number
CA2056253A1
CA2056253A1 CA2056253A CA2056253A CA2056253A1 CA 2056253 A1 CA2056253 A1 CA 2056253A1 CA 2056253 A CA2056253 A CA 2056253A CA 2056253 A CA2056253 A CA 2056253A CA 2056253 A1 CA2056253 A1 CA 2056253A1
Authority
CA
Canada
Prior art keywords
positioning element
rod
correct position
pedicle screw
rotational axis
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
CA2056253A
Other languages
French (fr)
Other versions
CA2056253C (en
Inventor
Johannes Fridolin Schlapfer
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 CA2056253A1 publication Critical patent/CA2056253A1/en
Application granted granted Critical
Publication of CA2056253C publication Critical patent/CA2056253C/en
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • A61B17/7032—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
    • A61B17/704—Screws or hooks, wherein a rod-clamping part and a bone-anchoring part can pivot relative to each other the longitudinal element passing through a ball-joint in the screw head
    • 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
    • A61B17/84—Fasteners therefor or fasteners being internal fixation devices
    • A61B17/86—Pins or screws or threaded wires; nuts therefor

Abstract

An anchoring device (1) consists of a pedicle screw (3) with a U-shaped holder (5). By means of a support (8, 16) having a rotational axis (9) positioned in the holder (5), a support rod (2) is positioned in such manner that it can pivot. A
positioning element (12) is housed positively on the rod (2).
Said element (12) has a surface (13) that has a radius R to rotational axis (9) when the positioning element (12) is slid necessarily to the pre-determined correct position. A nut (14) is screwed on threaded segments on the jaws (6,6') of the U-shaped holder (5), and by means of its bottom edge initially necessarily brings the positioning element (12) into the correct position on the axis (1); when turned again, it fixes the rod (2) and the pedicle screw (3) so that no undesired stresses occur.
The device (1) is used in osteosynthesis, particularly for stabilizing vertebral column segments.
CA002056253A 1990-11-26 1991-11-26 Anchoring device Expired - Lifetime CA2056253C (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH03733/90-0 1990-11-26
CH373390A CH685850A5 (en) 1990-11-26 1990-11-26 anchoring device

Publications (2)

Publication Number Publication Date
CA2056253A1 true CA2056253A1 (en) 1992-05-27
CA2056253C CA2056253C (en) 1996-06-18

Family

ID=4262333

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002056253A Expired - Lifetime CA2056253C (en) 1990-11-26 1991-11-26 Anchoring device

Country Status (6)

Country Link
US (1) US5190543A (en)
EP (1) EP0487895B1 (en)
JP (1) JP2538465B2 (en)
CA (1) CA2056253C (en)
CH (1) CH685850A5 (en)
DE (1) DE59104244D1 (en)

Families Citing this family (212)

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CA2056253C (en) 1996-06-18
JPH04307056A (en) 1992-10-29
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EP0487895B1 (en) 1995-01-11
EP0487895A1 (en) 1992-06-03
US5190543A (en) 1993-03-02
JP2538465B2 (en) 1996-09-25
CH685850A5 (en) 1995-10-31

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