CA2268513A1 - Pedicle screw and an assembly aid therefor - Google Patents

Pedicle screw and an assembly aid therefor Download PDF

Info

Publication number
CA2268513A1
CA2268513A1 CA002268513A CA2268513A CA2268513A1 CA 2268513 A1 CA2268513 A1 CA 2268513A1 CA 002268513 A CA002268513 A CA 002268513A CA 2268513 A CA2268513 A CA 2268513A CA 2268513 A1 CA2268513 A1 CA 2268513A1
Authority
CA
Canada
Prior art keywords
shank
pedicle screw
sections
head
assembly aid
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
CA002268513A
Other languages
French (fr)
Other versions
CA2268513C (en
Inventor
Christian Lutz
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.)
Stryker European Holdings I LLC
Original Assignee
Howmedica GmbH
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 Howmedica GmbH filed Critical Howmedica GmbH
Publication of CA2268513A1 publication Critical patent/CA2268513A1/en
Application granted granted Critical
Publication of CA2268513C publication Critical patent/CA2268513C/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • 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
    • A61F5/00—Orthopaedic methods or devices for non-surgical treatment of bones or joints; Nursing devices; Anti-rape devices
    • A61F5/01—Orthopaedic devices, e.g. splints, casts or braces
    • A61F5/04—Devices for stretching or reducing fractured limbs; Devices for distractions; Splints
    • 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
    • A61B17/7074—Tools specially adapted for spinal fixation operations other than for bone removal or filler handling
    • A61B17/7083—Tools for guidance or insertion of tethers, rod-to-anchor connectors, rod-to-rod connectors, or longitudinal elements
    • A61B17/7086—Rod reducers, i.e. devices providing a mechanical advantage to allow a user to force a rod into or onto an anchor head other than by means of a rod-to-bone anchor locking element; rod removers
    • 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
    • A61B17/7074—Tools specially adapted for spinal fixation operations other than for bone removal or filler handling
    • A61B17/7091—Tools specially adapted for spinal fixation operations other than for bone removal or filler handling for applying, tightening or removing longitudinal element-to-bone anchor locking elements, e.g. caps, set screws, nuts or wedges

Abstract

The invention relates to a pedicle screw and an assembly aid therefor, wherein the pedicle screw comprises a threaded shank and a fork-like head formed by two distanced sections and wherein the sections between themselves form a receiver for an elongate rod and on the sides facing one another there are provided threaded sections into which a threaded element may be screwed for fastening the rod on the head. The head sections of the pedicle screw on the outside comprise a recess, the assembly aid comprises an elongate sleeve in which a shank is axially but rotationally securely displaceable, wherein on the front end of the shank there are attached two parallel arms arranged at a distance, which with a front gripping section engage into the recesses of the head for transmitting a tension force, between the sleeve and the shank there is provided an adjusting mechanism for the axial relative adjustment of the two parts, and the shank comprises an axial passage for the leading through of a relatively thin tool shank from the rear end of the sleeve until beyond the front end of the shank..
CA002268513A 1998-04-09 1999-04-08 Pedicle screw and an assembly aid therefor Expired - Fee Related CA2268513C (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE29806563.0 1998-04-09
DE29806563U DE29806563U1 (en) 1998-04-09 1998-04-09 Pedicle screw and assembly aid for it

Publications (2)

Publication Number Publication Date
CA2268513A1 true CA2268513A1 (en) 1999-10-09
CA2268513C CA2268513C (en) 2007-06-19

Family

ID=8055592

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002268513A Expired - Fee Related CA2268513C (en) 1998-04-09 1999-04-08 Pedicle screw and an assembly aid therefor

Country Status (8)

Country Link
US (1) US6183472B1 (en)
EP (1) EP0948939B1 (en)
JP (1) JP3431069B2 (en)
KR (1) KR19990083073A (en)
AU (1) AU748182B2 (en)
CA (1) CA2268513C (en)
DE (2) DE29806563U1 (en)
ZA (1) ZA992516B (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9717533B2 (en) 2013-12-12 2017-08-01 Roger P. Jackson Bone anchor closure pivot-splay control flange form guide and advancement structure

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* Cited by examiner, † Cited by third party
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US6183472B1 (en) 2001-02-06
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