EP0926995A1 - Crochet pour implants servant a corriger et stabiliser la position de la colonne vertebrale - Google Patents

Crochet pour implants servant a corriger et stabiliser la position de la colonne vertebrale

Info

Publication number
EP0926995A1
EP0926995A1 EP98934798A EP98934798A EP0926995A1 EP 0926995 A1 EP0926995 A1 EP 0926995A1 EP 98934798 A EP98934798 A EP 98934798A EP 98934798 A EP98934798 A EP 98934798A EP 0926995 A1 EP0926995 A1 EP 0926995A1
Authority
EP
European Patent Office
Prior art keywords
hook
head part
pin
rod
receptacle
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.)
Withdrawn
Application number
EP98934798A
Other languages
German (de)
English (en)
Inventor
Archibald Von Strempel
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.)
Ulrich GmbH and Co KG
Original Assignee
Ulrich GmbH and Co KG
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 Ulrich GmbH and Co KG filed Critical Ulrich GmbH and Co KG
Publication of EP0926995A1 publication Critical patent/EP0926995A1/fr
Withdrawn legal-status Critical Current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
    • A61B17/7047—Clamps comprising opposed elements which grasp one vertebra between them
    • 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

Definitions

  • the invention relates to a hook for implants for correcting and stabilizing the spine, with a head part, which has a receptacle for a rod that can be fixed on the head part, into which the rod can be inserted, and with a leg that can be hooked behind the bone.
  • the invention is therefore based on the object of designing a hook of the type mentioned in such a way that the hold of the hook on the vertebra is improved.
  • the invention offers the advantage that the vertebra is enclosed in the manner of a clamp by the legs of the two hooks which form the ring and which are themselves connected to one another by means of a rest seat.
  • a bore is formed on the head of the first hook, into which a pin formed on the head part of the second hook can be inserted.
  • the pin has a barb which, in the engaged state, engages an undercut on the head part of the first hook.
  • the barbs ensure a secure connection of the first hook to the second hook, whereby an accidental, unwanted separation of the two hooks is not possible.
  • the pin is divided and consists of two resilient tongues on which the barb is formed.
  • the two resilient tongues can be deflected so that the barb is released from the undercut and the pin can be pulled out of the bore of the first hook so that a hook that has already been placed can be moved before the final assembly of the implant.
  • the pin is mounted in a bore in the head part of the first hook and is secured there by a pin inserted into a transverse bore.
  • this embodiment also has the additional advantage that after the pin has been inserted into the bore of the first hook after the pin has been removed from the transverse bore, the connection between the first hook and the second hook can also be released in that the pin in Inserting direction is further driven through the bore of the first hook.
  • a particularly preferred embodiment is characterized in that on the head part there is a bracket part which overlaps the receptacle for the rod on both sides, which is detachably held on the head part with lateral leg parts, and in that on the head part and / or bracket part against the rod inserted in the receptacle, pre-adjustable securing members are provided which secure it against displacement in the longitudinal direction of the bar when the receptacle is closed by the bracket part.
  • the hook can be integrated into implants that are already known and have been tried and tested in practice, the usual workflow being such that the spine can first be fitted with the hooks and the rod only has to be put on afterwards, which is what the handling of the Implant much easier.
  • the side leg parts are expediently guided by dovetail guides on the head part, which prevent the leg parts from spreading apart.
  • 1 is a side view of a first hook aligned with the second hook before plugging together
  • 2 is a plan view of the subject of FIG. 1
  • FIG. 3 shows a representation corresponding to FIG. 1 after being plugged together
  • FIG. 4 shows a representation corresponding to FIG. 2 after being plugged together
  • Fig. 5 is an end view of the second hook
  • Fig. 6 is an end view of the bracket part.
  • Fig. 1 is with
  • Reference symbol 1 is a first hook
  • reference symbol 2 denotes a second hook.
  • the first hook 1 and the second hook 2 each have a head part 3 and a leg 4.
  • a receptacle 5 is formed in the head part 3, into which a rod of the implant can be inserted and fixed.
  • the first hook 1 and the second hook 2 can be connected to one another via a seat, so that the legs 4 form a ring which surrounds a vertebra in the manner of a clamp.
  • the head part 3 of the first hook 1 has a bore 6 into which a pin 7 formed on the head part 3 of the second hook 2 can be inserted, the pin 7 comprising two resilient tongues 8 in the embodiment shown in the drawing there is a barb 9 at its free ends, which engages behind an undercut in the state inserted into the bore 6 of the first hook.
  • two resilient tongues 8 there is the possibility to release the barb 9 from the undercut and thus to separate the first hook 1 and the second hook 2 from each other again, so that a placement of the hook once on the spine can be corrected.
  • the pin 9 is mounted in a bore 6 of the head part 3 of the second hook 2 and secured there by a pin 10 inserted into a transverse bore; in the embodiment shown in FIGS. 5 and 6, the pin 9 is formed in one piece with the second hook 2.
  • Pedicle screw with a head part 3 of the same shape as the hook enables a particularly advantageous connection to the rod of the implant.
  • the hook according to the invention can be used instead of the pedicle screw shown in DE 41 07 480 AI and thus forms part of an implant system in which an easy-to-use securing of the rod in the receptacle 5 of the head part 3 is provided. Because of the features realized in the shape of the head part 3, reference can be made to DE 41 07 480 AI, in which the features also implemented for the hook are described with validity for the explanation of the present drawing.
  • bracket part 11 which overlaps the rod 5 on both sides and has lateral leg parts 12 which are guided by dovetail guides 13 on the head part 3.
  • bracket part 11 On the bracket part 11 is in a threaded receptacle 14 Clamping screw arranged, which is pre-adjustable against the rod designed as a threaded rod, which is thereby pressed with its threads against transverse ribs formed on the head part 3.

Abstract

L'invention concerne un crochet pour implants servant à corriger et stabiliser la position de la colonne vertébrale, ledit crochet présentant une partie tête (3) comportant un logement (5) pour une tige pouvant être fixée à la partie tête (3) et pouvant être introduite dans ledit logement. Ce crochet présente également un bras (4) pouvant être accroché derrière l'os. Deux des crochets peuvent être encastrés l'un dans l'autre de façon libérable par l'intermédiaire de leurs parties tête (3). Les bras desdits crochets forment un anneau lorsqu'ils sont en position encastrée.
EP98934798A 1997-07-26 1998-05-20 Crochet pour implants servant a corriger et stabiliser la position de la colonne vertebrale Withdrawn EP0926995A1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19732187 1997-07-26
DE19732187A DE19732187C2 (de) 1997-07-26 1997-07-26 Haken für Implantate zur Korrektur und Stabilisierung der Wirbelsäule
PCT/DE1998/001437 WO1999004716A1 (fr) 1997-07-26 1998-05-20 Crochet pour implants servant a corriger et stabiliser la position de la colonne vertebrale

Publications (1)

Publication Number Publication Date
EP0926995A1 true EP0926995A1 (fr) 1999-07-07

Family

ID=7836966

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98934798A Withdrawn EP0926995A1 (fr) 1997-07-26 1998-05-20 Crochet pour implants servant a corriger et stabiliser la position de la colonne vertebrale

Country Status (4)

Country Link
US (1) US6117136A (fr)
EP (1) EP0926995A1 (fr)
DE (1) DE19732187C2 (fr)
WO (1) WO1999004716A1 (fr)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2763236B1 (fr) * 1997-05-16 1999-10-15 Scient X Implant pour dispositif d'osteosynthese vertebral du type a crochet
GB9821571D0 (en) * 1998-10-05 1998-11-25 Depuy Int Ltd Improvements in and relating to fixings
US20040243128A1 (en) * 2001-05-17 2004-12-02 Howland Robert S. Selective axis posterior lumbar spinal plating fixation apparatus and methods for use
US7314467B2 (en) * 2002-04-24 2008-01-01 Medical Device Advisory Development Group, Llc. Multi selective axis spinal fixation system
US6740089B2 (en) 2002-01-10 2004-05-25 Thomas T. Haider Orthopedic hook system
FR2835734B1 (fr) * 2002-02-11 2004-10-29 Scient X Systeme de liaison entre une tige rachidienne et une barre transversale
US20040260284A1 (en) * 2003-06-23 2004-12-23 Matthew Parker Anti-splay pedicle screw
US8696714B2 (en) * 2007-11-02 2014-04-15 The Board Of Trustees Of The Leland Stanford Junior University Intervertebral stabilization devices
CN103622740A (zh) * 2013-12-12 2014-03-12 周建明 微创脊柱内固定系统
US10575876B2 (en) 2016-04-20 2020-03-03 K2M, Inc. Spinal stabilization assemblies with bone hooks

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE6921892U (de) * 1969-05-31 1969-10-09 Miag Muehlenbau & Ind Gmbh Einlauf-verteilvorrichtung fuer schwingsiebe
US4611582A (en) * 1983-12-27 1986-09-16 Wisconsin Alumni Research Foundation Vertebral clamp
DE4107480C2 (de) * 1991-03-08 1994-09-22 Heinrich Ulrich Pedikelschraube für Implantate zur Korrektur und Stabilisierung der Wirbelsäule
US5257993A (en) * 1991-10-04 1993-11-02 Acromed Corporation Top-entry rod retainer
CH686610A5 (de) * 1991-10-18 1996-05-15 Pina Vertriebs Ag Kompressionsimplantat.
FR2684866B1 (fr) * 1991-12-12 1994-05-13 Jbs Perfectionnements aux procedes et aux dispositifs de redressement, fixation, compression, elongation du rachis.
FR2695550B1 (fr) * 1992-09-11 1995-02-24 Jbs Sa Pince pédiculaire pour dispositifs de redressement, de fixation, de compression et d'élongation de vertèbres cervicales.
US5527314A (en) * 1993-01-04 1996-06-18 Danek Medical, Inc. Spinal fixation system
US5380326A (en) * 1993-11-12 1995-01-10 Lin; Chih-I Clamping device for vertebral locking rod
FR2718945B1 (fr) * 1994-04-25 1996-07-05 Soprane Sa Dispositif de retenue d'une tige de liaison d'un fixateur de rachis sur une vis pédiculaire.
FR2734147B1 (fr) * 1995-05-19 1997-10-10 Klein Jean Michel Dispositif d'osteosynthese implantable

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO9904716A1 *

Also Published As

Publication number Publication date
WO1999004716A1 (fr) 1999-02-04
DE19732187C2 (de) 1999-05-27
DE19732187A1 (de) 1999-02-18
US6117136A (en) 2000-09-12

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