WO2010011915A8 - Locking mechanism with two-piece washer - Google Patents

Locking mechanism with two-piece washer Download PDF

Info

Publication number
WO2010011915A8
WO2010011915A8 PCT/US2009/051675 US2009051675W WO2010011915A8 WO 2010011915 A8 WO2010011915 A8 WO 2010011915A8 US 2009051675 W US2009051675 W US 2009051675W WO 2010011915 A8 WO2010011915 A8 WO 2010011915A8
Authority
WO
WIPO (PCT)
Prior art keywords
locking mechanism
washer
rod
fixation
piece washer
Prior art date
Application number
PCT/US2009/051675
Other languages
French (fr)
Other versions
WO2010011915A1 (en
Inventor
David S. Randol
David A. Walsh
Original Assignee
Ingenium, S.A.
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 Ingenium, S.A. filed Critical Ingenium, S.A.
Priority to EP09790800A priority Critical patent/EP2341853A1/en
Priority to CN2009801374451A priority patent/CN102164551A/en
Priority to MX2011000917A priority patent/MX2011000917A/en
Publication of WO2010011915A1 publication Critical patent/WO2010011915A1/en
Publication of WO2010011915A8 publication Critical patent/WO2010011915A8/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
    • A61B90/00—Instruments, implements or accessories specially adapted for surgery or diagnosis and not covered by any of the groups A61B1/00 - A61B50/00, e.g. for luxation treatment or for protecting wound edges
    • A61B90/03—Automatic limiting or abutting means, e.g. for safety
    • A61B2090/037—Automatic limiting or abutting means, e.g. for safety with a frangible part, e.g. by reduced diameter

Abstract

Locking mechanisms (100) and methods of fixation, such as the fixation of a fixation device (104) like a bone screw and of a rod (106) to the spine. The locking mechanism (100) includes a body (102), a rod seat (110) and a set screw. The rod seat (110) is configured to separate into two pieces (110a-b) when the rod (106) exerts force on the top portion (123) of the washer (410) and the set screw limits movement of the washer (410) toward the bottom of the locking mechanism (100).
PCT/US2009/051675 2008-07-24 2009-07-24 Locking mechanism with two-piece washer WO2010011915A1 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
EP09790800A EP2341853A1 (en) 2008-07-24 2009-07-24 Locking mechanism with two-piece washer
CN2009801374451A CN102164551A (en) 2008-07-24 2009-07-24 Locking mechanism with two-piece washer
MX2011000917A MX2011000917A (en) 2008-07-24 2009-07-24 Locking mechanism with two-piece washer.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US12/179,136 US8157846B2 (en) 2008-07-24 2008-07-24 Locking mechanism with two-piece washer
US12/179,136 2008-07-24

Publications (2)

Publication Number Publication Date
WO2010011915A1 WO2010011915A1 (en) 2010-01-28
WO2010011915A8 true WO2010011915A8 (en) 2010-06-03

Family

ID=41211956

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2009/051675 WO2010011915A1 (en) 2008-07-24 2009-07-24 Locking mechanism with two-piece washer

Country Status (5)

Country Link
US (1) US8157846B2 (en)
EP (1) EP2341853A1 (en)
CN (1) CN102164551A (en)
MX (1) MX2011000917A (en)
WO (1) WO2010011915A1 (en)

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Also Published As

Publication number Publication date
EP2341853A1 (en) 2011-07-13
MX2011000917A (en) 2011-04-26
US8157846B2 (en) 2012-04-17
WO2010011915A1 (en) 2010-01-28
CN102164551A (en) 2011-08-24
US20100023061A1 (en) 2010-01-28

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