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Biased angle polyaxial pedicle screw assembly

Info

Publication number
WO2005086649B1
WO2005086649B1 PCT/US2005/005676 US2005005676W WO2005086649B1 WO 2005086649 B1 WO2005086649 B1 WO 2005086649B1 US 2005005676 W US2005005676 W US 2005005676W WO 2005086649 B1 WO2005086649 B1 WO 2005086649B1
Authority
WO
Grant status
Application
Patent type
Prior art keywords
screw
head
assembly
bone
comprises
Prior art date
Application number
PCT/US2005/005676
Other languages
French (fr)
Other versions
WO2005086649A3 (en )
WO2005086649A2 (en )
Inventor
Mahmoud F Abdelgany
Aaron D Markworth
Original Assignee
Custom Spine Inc
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

Links

Classifications

    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61BDIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/56Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor
    • A61B17/58Surgical 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
    • A61B17/68Internal fixation devices, including fasteners and spinal fixators, even if a part thereof projects from the skin
    • A61B17/70Spinal positioners or stabilisers ; Bone stabilisers comprising fluid filler in an implant
    • A61B17/7001Screws or hooks combined with longitudinal elements which do not contact vertebrae
    • A61B17/7035Screws or hooks, wherein a rod-clamping part and a bone-anchoring part can pivot relative to each other
    • A61B17/7038Screws or hooks, wherein a rod-clamping part and a bone-anchoring part can pivot relative to each other to a different extent in different directions, e.g. within one plane only
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61BDIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/56Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor
    • A61B17/58Surgical 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
    • A61B17/68Internal fixation devices, including fasteners and spinal fixators, even if a part thereof projects from the skin
    • A61B17/70Spinal positioners or stabilisers ; Bone stabilisers comprising fluid filler in an implant
    • A61B17/7001Screws or hooks combined with longitudinal elements which do not contact vertebrae
    • A61B17/7035Screws or hooks, wherein a rod-clamping part and a bone-anchoring part can pivot relative to each other
    • A61B17/7037Screws 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
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61BDIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/56Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor
    • A61B17/58Surgical 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
    • A61B17/68Internal fixation devices, including fasteners and spinal fixators, even if a part thereof projects from the skin
    • A61B17/70Spinal positioners or stabilisers ; Bone stabilisers comprising fluid filler in an implant
    • A61B17/7001Screws or hooks combined with longitudinal elements which do not contact vertebrae
    • A61B17/7032Screws or hooks with U-shaped head or back through which longitudinal rods pass

Abstract

A pedicle screw assembly and method of assembly comprises a longitudinal member; a screw head comprising a bulbous end, wherein the screw head has a slot adapted to receive the longitudinal member; a bone fixator component comprising a concave socket having a biased angled top and a rounded bottom adapted to receive the screw head; a locking pin adapted to engage the screw head, the bone fixator component, and the longitudinal member; and a blocker adapted to engage the screw head and to secure the longitudinal member. Additionally, the bone fixator component may be configured as any of a bone screw and a hook.

Claims

Amended claimsReceived at the International Bureau on 07 August 2006 (07.08.2006)What is claimed is: CLAIMS
1. A pedicle screw assembly comprising: a screw head comprising an outwardly protruding bulbous end;
a bone fixator component comprising an angled concave socket adapted to receive said bulbous end of said screw head; a pin mounted within an inner portion of said screw head; and a blocker adapted to engage said screw head.
2. The assembly of claim 1 , wherein said screw head comprises a slot adapted to receive a longitudinal member.
3. The assembly of claim 1, wherein said concave socket comprises an angled top and a rounded bottom.
4. The assembly of claim 3, wherein said concave socket of said bone fixator component
comprises: an upper outer surface adapted to allow said screw head to angulate in one direction more
than another direction; an inner portion adapted to receive said bulbous end of said screw head; and a dimpled outer portion.
5. The assembly of claim 2, wherein said pin is adapted to engage said bone fixator
component and said longitudinal member.
i
6. The assembly of claim 2, wherein said blocker is adapted to secure said longitudinal
member.
7. The assembly of claim 1, wherein said pin comprises:
an upper saddle portion having a slot and a pair of upright ends; and a lower tapered portion adjacent to said slot.
8. The assembly of claim 2, wherein said screw head further comprises two opposed upright ends separated by said slot.
9. The assembly of claim 8, wherein each of said opposed upright ends comprise an inner
wall and an outer wall, wherein said inner wall comprises wall threads, and wherein said outer wall comprises grooves.
10. The assembly of claim 9, wherein said blocker comprises blocker threads configured around an outer perimeter of said blocker, said blocker threads being dimensioned and configured to mate with said wall threads.
11. The assembly of claim 1 , wherein said bulbous end of said screw head comprises a plurality of slots terminating at an opening at a tip of said bulbous end.
12. The assembly of claim 1, wherein said bulbous end of said screw head comprises a hole configured to receive said pin. .1 13. The assembly of claim 1 , wherein said bone fixator component comprises any of a bone
2 screw and a hook.
1 14. A pedicle screw assembly comprising:
2 a longitudinal member;
3 a screw head comprising:
4 a first portion comprising: i 5 a slot adapted to receive said longitudinal member; and
6 an inwardly curved bottom portion;
7 a second portion comprising an outwardly protruding bulbous end extending from
8 said inwardly curved bottom portion;
9 a bone fixator component comprising a concave socket having a biased angled outer top
10 and a rounded bottom adapted to receive said screw head;
11 a locking pin adapted to engage said screw head, said bone fixator component, and said
12 longitudinal member; and
113 a blocker adapted to engage said screw head and to secure said longitudinal member.
1 15. The assembly of claim 14, wherein said concave socket of said bone fixator component
2 comprises:
3 an inner portion adapted to receive said bulbous end of said screw head; and
4 a dimpled outer portion.
1 16. The assembly of claim 14, wherein said locking pin comprises: an upper saddle portion having a slot and a pair of upright ends; and a lower tapered portion adjacent to said slot.
17. The assembly of claim 14, wherein said bulbous end of said screw head comprises a hole configured to receive said pin.
18. The assembly of claim 14, wherein said bone fixator component comprises any of a bone screw and a hook.
19. A method of assembling a pedicle screw assembly, said method comprising: attaching a screw head comprising a first portion having an inwardly curved bottom surface and a second portion having an outwardly protruding bulbous end extending from said
bottom surface to a bone fixator component, wherein said bone fixator component comprises an
angled concave socket adapted to receive said bulbous end of said screw head;
securing said bone fixator component in a bone; securing a locking pin in said screw head; engaging said locking pin with said bone fixator component;
inserting a longitudinal member in said screw head; and inserting a blocker in said screw head.
20. The method of claim 19, wherein engagement of said blocker with said screw head causes expansion of said bulbous end of said screw head in said angled concave socket of said bone fixator component.
PCT/US2005/005676 2004-02-27 2005-02-23 Biased angle polyaxial pedicle screw assembly WO2005086649B1 (en)

Priority Applications (6)

Application Number Priority Date Filing Date Title
US54854304 true 2004-02-27 2004-02-27
US60/548,543 2004-02-27
US62245404 true 2004-10-27 2004-10-27
US60/622,454 2004-10-27
US11048213 US7163539B2 (en) 2004-02-27 2005-02-01 Biased angle polyaxial pedicle screw assembly
US11/048,213 2005-02-01

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
EP20050713963 EP1722700B1 (en) 2004-02-27 2005-02-23 Biased angle polyaxial pedicle screw assembly
DE200560017470 DE602005017470D1 (en) 2004-02-27 2005-02-23 Polyaxial screw stem arrangement with biasing angle
JP2007500934A JP4498412B2 (en) 2004-02-27 2005-02-23 Multi-axle Pattern joining screw assembly having a biasing angle

Publications (3)

Publication Number Publication Date
WO2005086649A2 true WO2005086649A2 (en) 2005-09-22
WO2005086649A3 true WO2005086649A3 (en) 2006-07-27
WO2005086649B1 true true WO2005086649B1 (en) 2006-09-21

Family

ID=34890979

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2005/005676 WO2005086649B1 (en) 2004-02-27 2005-02-23 Biased angle polyaxial pedicle screw assembly

Country Status (5)

Country Link
US (2) US7163539B2 (en)
JP (1) JP4498412B2 (en)
DE (1) DE602005017470D1 (en)
EP (1) EP1722700B1 (en)
WO (1) WO2005086649B1 (en)

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EP1722700A4 (en) 2008-05-21 application
DE602005017470D1 (en) 2009-12-17 grant
JP4498412B2 (en) 2010-07-07 grant
US20050192573A1 (en) 2005-09-01 application
US20070093831A1 (en) 2007-04-26 application
WO2005086649A3 (en) 2006-07-27 application
US7763057B2 (en) 2010-07-27 grant
JP2007523723A (en) 2007-08-23 application
EP1722700A2 (en) 2006-11-22 application
EP1722700B1 (en) 2009-11-04 grant
WO2005086649A2 (en) 2005-09-22 application
US7163539B2 (en) 2007-01-16 grant

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