WO2006121539A3 - Polyaxial bone screw with compound articulation - Google Patents

Polyaxial bone screw with compound articulation Download PDF

Info

Publication number
WO2006121539A3
WO2006121539A3 PCT/US2006/012650 US2006012650W WO2006121539A3 WO 2006121539 A3 WO2006121539 A3 WO 2006121539A3 US 2006012650 W US2006012650 W US 2006012650W WO 2006121539 A3 WO2006121539 A3 WO 2006121539A3
Authority
WO
WIPO (PCT)
Prior art keywords
retainer
receiver
capture structure
bone screw
shank
Prior art date
Application number
PCT/US2006/012650
Other languages
French (fr)
Other versions
WO2006121539A2 (en
Inventor
Roger P Jackson
Original Assignee
Roger P Jackson
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 Roger P Jackson filed Critical Roger P Jackson
Priority to AU2006244276A priority Critical patent/AU2006244276B2/en
Priority to EP06740553.0A priority patent/EP1887984B1/en
Priority to CA2607157A priority patent/CA2607157C/en
Publication of WO2006121539A2 publication Critical patent/WO2006121539A2/en
Publication of WO2006121539A3 publication Critical patent/WO2006121539A3/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

Abstract

A polyaxial bone screw assembly includes a threaded shank body having an upper capture structure, a receiver and a retainer having spherical inner and outer surfaces. The retainer is compressible, having an opening with two ends that may be pressed toward one another. The receiver has a U-shaped cradle defining a channel for receiving a spinal fixation rod. The receiver channel communicates with a cavity partially defined by a spherical surface and having a restrictive opening that allows for loading the capture structure and the compressed retainer into the receiver, but prevents passage of the retainer/capture structure assembly out of the receiver. The retainer is simultaneously bottom loaded with the shank capture structure by compressing open ends of the retainer towards each other and about a neck of the bone screw shank, the retainer resiliently springing back into a rounded shape after insertion in the receiver.
PCT/US2006/012650 2005-05-10 2006-03-30 Polyaxial bone screw with compound articulation WO2006121539A2 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
AU2006244276A AU2006244276B2 (en) 2005-05-10 2006-03-30 Polyaxial bone screw with compound articulation
EP06740553.0A EP1887984B1 (en) 2005-05-10 2006-03-30 Polyaxial bone screw with compound articulation
CA2607157A CA2607157C (en) 2005-05-10 2006-03-30 Polyaxial bone screw with compound articulation

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US11/126,965 US7476239B2 (en) 2005-05-10 2005-05-10 Polyaxial bone screw with compound articulation
US11/126,965 2005-05-10

Publications (2)

Publication Number Publication Date
WO2006121539A2 WO2006121539A2 (en) 2006-11-16
WO2006121539A3 true WO2006121539A3 (en) 2007-04-05

Family

ID=37397035

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2006/012650 WO2006121539A2 (en) 2005-05-10 2006-03-30 Polyaxial bone screw with compound articulation

Country Status (5)

Country Link
US (2) US7476239B2 (en)
EP (1) EP1887984B1 (en)
AU (1) AU2006244276B2 (en)
CA (1) CA2607157C (en)
WO (1) WO2006121539A2 (en)

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WO2006121539A2 (en) 2006-11-16
EP1887984A2 (en) 2008-02-20
AU2006244276A1 (en) 2006-11-16
AU2006244276B2 (en) 2009-07-16
US20060271047A1 (en) 2006-11-30
CA2607157C (en) 2011-09-20
EP1887984A4 (en) 2010-03-24
US7476239B2 (en) 2009-01-13
CA2607157A1 (en) 2006-11-16
EP1887984B1 (en) 2016-09-14
US20090048634A1 (en) 2009-02-19

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