CA2156250A1 - Clamp assembly for a spinal fixation system - Google Patents

Clamp assembly for a spinal fixation system

Info

Publication number
CA2156250A1
CA2156250A1 CA002156250A CA2156250A CA2156250A1 CA 2156250 A1 CA2156250 A1 CA 2156250A1 CA 002156250 A CA002156250 A CA 002156250A CA 2156250 A CA2156250 A CA 2156250A CA 2156250 A1 CA2156250 A1 CA 2156250A1
Authority
CA
Canada
Prior art keywords
rod
bore
spinal
pair
engaging portion
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
CA002156250A
Other languages
French (fr)
Other versions
CA2156250C (en
Inventor
Michael C. Sherman
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.)
Warsaw Orthopedic Inc
Original Assignee
Michael C. Sherman
Danek Medical, Inc.
Sdgi Holdings, Inc.
Warsaw Orthopedic, 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
Application filed by Michael C. Sherman, Danek Medical, Inc., Sdgi Holdings, Inc., Warsaw Orthopedic, Inc. filed Critical Michael C. Sherman
Publication of CA2156250A1 publication Critical patent/CA2156250A1/en
Application granted granted Critical
Publication of CA2156250C publication Critical patent/CA2156250C/en
Anticipated expiration legal-status Critical
Expired - Fee Related 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
    • A61B17/7035—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
    • A61B17/7035—Screws or hooks, wherein a rod-clamping part and a bone-anchoring part can pivot relative to each other
    • A61B17/7038—Screws 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
    • 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
    • A61B17/7041—Screws or hooks combined with longitudinal elements which do not contact vertebrae with single longitudinal rod offset laterally from single row of screws or hooks

Abstract

A spinal fixation system includes an elongated spinal rod (R) and a number of vertebral fixation elements (10), each including a vertebra engaging portion (11) and a rod engaging portion (13) formed by a pair of posts extending from the vertebra engaging portion. The vertebral fixation elements are engaged to the spinal rod each by way of a top-loading clamp (20) that permits access directly from the top of the instrumentation site for tightening the system. The clamp includes a body (21) defining an elongated bore (22) configured to receive the spinal rod (R) therethrough and a pair of threaded bores (29) from opposite top and bottom surfaces of the body, each intersecting the rod bore (22). The clamp further includes a projection (24) extending from the body terminating in a T-bar (26) having a clamping surface (27) directed inwardly toward the elongated bore configured to engage the pair of posts (14) of the vertebral fixation clement (10). A set screw (30) is threaded into one of the threaded bores (29) to bear against the spinal rod disposed within the rod bore.
CA002156250A 1993-02-17 1994-01-26 Clamp assembly for a spinal fixation system Expired - Fee Related CA2156250C (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US08/018,800 US5282801A (en) 1993-02-17 1993-02-17 Top tightening clamp assembly for a spinal fixation system
US08/018,800 1993-02-17
PCT/US1994/000950 WO1994018917A1 (en) 1993-02-17 1994-01-26 Clamp assembly for a spinal fixation system

Publications (2)

Publication Number Publication Date
CA2156250A1 true CA2156250A1 (en) 1994-09-01
CA2156250C CA2156250C (en) 2004-08-03

Family

ID=21789847

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002156250A Expired - Fee Related CA2156250C (en) 1993-02-17 1994-01-26 Clamp assembly for a spinal fixation system

Country Status (14)

Country Link
US (1) US5282801A (en)
EP (1) EP0686019B1 (en)
JP (1) JP3386130B2 (en)
KR (1) KR100278252B1 (en)
CN (1) CN1120807A (en)
AT (1) ATE219912T1 (en)
AU (1) AU677821B2 (en)
CA (1) CA2156250C (en)
DE (1) DE69430906T2 (en)
ES (1) ES2177574T3 (en)
TR (1) TR28620A (en)
TW (1) TW306876B (en)
WO (1) WO1994018917A1 (en)
ZA (1) ZA94860B (en)

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Also Published As

Publication number Publication date
AU6096894A (en) 1994-09-14
CN1120807A (en) 1996-04-17
EP0686019A4 (en) 1996-09-18
AU677821B2 (en) 1997-05-08
KR960700667A (en) 1996-04-24
JPH08509396A (en) 1996-10-08
EP0686019A1 (en) 1995-12-13
DE69430906T2 (en) 2003-02-20
KR100278252B1 (en) 2001-11-22
WO1994018917A1 (en) 1994-09-01
TR28620A (en) 1996-11-14
ATE219912T1 (en) 2002-07-15
CA2156250C (en) 2004-08-03
US5282801A (en) 1994-02-01
JP3386130B2 (en) 2003-03-17
EP0686019B1 (en) 2002-07-03
TW306876B (en) 1997-06-01
DE69430906D1 (en) 2002-08-08
ES2177574T3 (en) 2002-12-16
ZA94860B (en) 1994-08-23

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