FR2727620A1 - Vertebral osteosynthesis system for supporting or mending vertebrae - Google Patents

Vertebral osteosynthesis system for supporting or mending vertebrae Download PDF

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Publication number
FR2727620A1
FR2727620A1 FR9414587A FR9414587A FR2727620A1 FR 2727620 A1 FR2727620 A1 FR 2727620A1 FR 9414587 A FR9414587 A FR 9414587A FR 9414587 A FR9414587 A FR 9414587A FR 2727620 A1 FR2727620 A1 FR 2727620A1
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FR
France
Prior art keywords
jaw
rod
vertebral osteosynthesis
pedicle screw
osteosynthesis device
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
FR9414587A
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French (fr)
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FR2727620B3 (en
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GROB RAOUL
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GROB RAOUL
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 GROB RAOUL filed Critical GROB RAOUL
Priority to FR9414587A priority Critical patent/FR2727620A1/en
Publication of FR2727620A1 publication Critical patent/FR2727620A1/en
Application granted granted Critical
Publication of FR2727620B3 publication Critical patent/FR2727620B3/fr
Granted legal-status Critical Current

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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
    • A61B17/7041—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
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
    • A61B2017/0042—Surgical instruments, devices or methods, e.g. tourniquets with special provisions for gripping
    • A61B2017/00429—Surgical instruments, devices or methods, e.g. tourniquets with special provisions for gripping with a roughened portion
    • A61B2017/00433—Surgical instruments, devices or methods, e.g. tourniquets with special provisions for gripping with a roughened portion knurled
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
    • A61B2017/00831—Material properties
    • A61B2017/00858—Material properties high friction, non-slip

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  • Health & Medical Sciences (AREA)
  • Orthopedic Medicine & Surgery (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Neurology (AREA)
  • Surgery (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Engineering & Computer Science (AREA)
  • Biomedical Technology (AREA)
  • Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
  • Medical Informatics (AREA)
  • Molecular Biology (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Surgical Instruments (AREA)
  • Prostheses (AREA)

Abstract

The system consists of two rigid and parallel supporting rods, fixed to pedicular screws by an anchoring element in the form of a stirrup (4) with two jaws (4a, 4b) connected by a hinge (5) which allows them to open at 180 degrees to one another. The lower of the two jaws (4a) has a hole (6) through it for the pedicular screw, while the upper one (4b) has a U-shaped recess (7) for positioning it on the screw after the rod (8) has been fitted in place. The inner surfaces of both jaws have projections to give them an improved grip on the rod.

Description

La présente invention concerne le domaine des dispositifs d'ostéosynthèse vertébrale utilisés pour étayer ou redresser un rachis.The present invention relates to the field of vertebral osteosynthesis devices used to support or straighten a spine.

Ces dispositifs comprennent deux tiges rigides de support sensiblement parallèles disposées chacune d'un côté des apophyses épineuses des vertèbres et sur lesquels sont montés des éléments d'ancrage osseux tels que des vis destinées à prendre appui dans le pédicule de la vertèbre.These devices include two rigid substantially parallel support rods each disposed on one side of the spinous processes of the vertebrae and on which are mounted bone anchoring elements such as screws intended to bear in the pedicle of the vertebra.

L'objet de l'invention concerne l'étrier de fixation qui permet de raccorder la tige vertébrale à la vis pédiculaire et sert à enserrer et bloquer le dispositif.The object of the invention relates to the fixing bracket which makes it possible to connect the vertebral rod to the pedicle screw and serves to grip and block the device.

Les dispositifs de raccord connus sont constitués par des étriers en deux parties qui sont difficiles à mettre en place sur la vis pédiculaire et à serrer car ils se déboîtent lors du serrage.Known connecting devices consist of two-part stirrups which are difficult to set up on the pedicle screw and to tighten because they disengage during tightening.

Différents perfectionnements ont été proposés pour faciliter la mise en place et permettre un meilleur serrage.Various improvements have been proposed to facilitate installation and allow better tightening.

Ainsi le brevet français FR2681776 concerne un dispositif comprenant un élément d'accrochage, solidaire de la vis comprenant deux parois latérales faisant saillie, inclinées l'une en direction de l'autre, délimitant un canal et un élément de serrage.Thus, French patent FR2681776 relates to a device comprising a hooking element, integral with the screw comprising two projecting side walls, inclined towards one another, delimiting a channel and a clamping element.

Le brevet européen EP578320 concerne un moyen de liaison pour tige spirale constitué par un étrier et un corps de liaison qui vient enserrer et bloquer la tige spinale avec un angle non perpendiculaire par rapport à la tige. European patent EP578320 relates to a connecting means for a spiral rod constituted by a stirrup and a connecting body which encloses and blocks the spinal rod at an angle not perpendicular to the rod.

Le dispositif de raccord de l'invention est constitué par un étrier monobloc formé de deux parties articulées par une charnière, analogue à une mâchoire.The coupling device of the invention consists of a one-piece stirrup formed by two parts articulated by a hinge, similar to a jaw.

L'étrier se positionne sur la partie supérieure de la vis pédiculaire, ce qui permet l'enserrage de la tige lors de l'ancrage de la vis pédiculaire.The bracket is positioned on the upper part of the pedicle screw, which allows the rod to be clamped when the pedicle screw is anchored.

L'invention sera mieux comprise à l'aide de la description qui suit, en référence au dessins schématiques annexés représentant à titre d'exemple non limitatif une forme de réalisation préférée.The invention will be better understood with the aid of the description which follows, with reference to the appended schematic drawings showing by way of nonlimiting example a preferred embodiment.

La figure 1 représente une vue générale du dispositif fixé sur la vis pédiculaire.FIG. 1 represents a general view of the device fixed on the pedicle screw.

La figure 2 représente une vue éclatée du dispositif.Figure 2 shows an exploded view of the device.

La figure 3 représente une vue détaillée de l'étrier.Figure 3 shows a detailed view of the stirrup.

La figure 4 représente une vue de dessus du dispositif.Figure 4 shows a top view of the device.

La vis pédiculaire (1) utilisée est une vis pédiculaire connue en soi composée d'une partie (la) à pas de vis large qui se visse dans l'os, délimitée par un écrou (2) qui sert d'arrêt , une partie lisse (lb) où se place l'étrier, une partie à pas de vis fin (lc) pour le vissage de l'étrier à l'aide d'un écrou (3) sur la tige spinale et d'un écrou de serrage (9)..The pedicle screw (1) used is a pedicle screw known per se composed of a part (la) with a large screw pitch which is screwed into the bone, delimited by a nut (2) which serves as a stop, a part smooth (lb) where the stirrup is placed, a part with fine screw thread (lc) for screwing the stirrup using a nut (3) on the spinal rod and a tightening nut (9) ..

L'étrier (4) est formée de 2 mâchoires (4a) et (4b) articulées autour d'un axe 5 permettant une ouverture à 180 degrés.The stirrup (4) is formed by 2 jaws (4a) and (4b) articulated around an axis 5 allowing an opening at 180 degrees.

La mâchoire inférieure (4a) comporte un perçage (6) qui permet la mise en place sur la partie (lb) de la vis. The lower jaw (4a) has a hole (6) which allows the positioning on the part (lb) of the screw.

La mâchoire supérieure (4b) comporte un évidement en forme de U qui permet le passage de la vis lors de la fermeture de la mâchoire après la mise en place de la tige spinale (8).The upper jaw (4b) has a U-shaped recess which allows the screw to pass when the jaw closes after the spinal rod (8) has been put in place.

Comme cela apparaît sur la figure 3 les faces intérieures des mâchoires sont pourvues d'empreintes permettant un meilleur serrage de la tige dont la surface est couverte de picots.As shown in Figure 3 the inner faces of the jaws are provided with indentations allowing better tightening of the rod whose surface is covered with spikes.

Après fixation de la tige spinale par l'écrou (3) le serrage de la tige est réalisée par l'écrou de serrage (9) de la vis pédiculaire.After fixing the spinal rod by the nut (3), the rod is tightened by the tightening nut (9) of the pedicle screw.

Le dispositif d'ostéosynthèse est mis en place par vissage des vis pédiculaires dans la vertèbre, positionnement de la mâchoire supérieure (4a) par le perçage (6) sur la partie
(lb) de la vis, mise en place de la tige (8) sur la mâchoire
(4a), fermeture de la mâchoire supérieure (4b), fixation des mâchoires à la vis pédiculaire par l'écrou (3) et enserrage et fixation de l'ensemble par l'écrou (9) de la vis pédiculaire.The osteosynthesis device is put in place by screwing the pedicle screws into the vertebra, positioning the upper jaw (4a) by the hole (6) on the part
(lb) of the screw, fitting of the rod (8) on the jaw
(4a), closing the upper jaw (4b), fixing the jaws to the pedicle screw by the nut (3) and clamping and fixing of the assembly by the nut (9) of the pedicle screw.

Il va de soi que sur la base du principe de la présente invention le dispositif d'enserrage de tiges spinales peut s'appliquer à des dispositifs d'enserrage analogue. It goes without saying that on the basis of the principle of the present invention the device for clamping spinal rods can be applied to similar clamping devices.

Claims (6)

REVENDICATIONS 1 - Dispositif d'ostéosynthèse vertébrale du type comprenant deux tiges rigides de support sensiblement parallèles fixés sur des vis pédiculaires par l'intermédiaire d'un élément d'ancrage caractérisé en ce que l'élément d'ancrage de la tige est constitué par un étrier monobloc (4) analogue à une mâchoire formé de deux parties articulées par une charnière. 1 - Vertebral osteosynthesis device of the type comprising two rigid substantially parallel support rods fixed on pedicle screws by means of an anchoring element characterized in that the anchoring element of the rod is constituted by a monobloc stirrup (4) similar to a jaw formed of two parts articulated by a hinge. 2 - Dispositif d'ostéosynthèse vertébrale selon la revendication 1 caractérisé en ce que la mâchoire inférieure 2 - Vertebral osteosynthesis device according to claim 1 characterized in that the lower jaw (4a) et la mâchoire supérieure (4b) sont articulées autour d'un axe (5) permettant une ouverture à 180 degrés. (4a) and the upper jaw (4b) are articulated around an axis (5) allowing an opening at 180 degrees. 3 - Dispositif d'ostéosynthèse vertébrale selon l'une quelconque des revendications 1 à 2 caractérisé en ce que la mâchoire inférieure (4a) comporte un perçage (6) .pour le passage de la vis pédiculaire (1). 3 - Vertebral osteosynthesis device according to any one of claims 1 to 2 characterized in that the lower jaw (4a) has a bore (6) .pour the passage of the pedicle screw (1). 4 - Dispositif d'ostéosynthèse vertébrale selon l'une quelconque des revendications 1 à 2 caractérisé en ce que la mâchoire supérieure (4b) comporte un évidement (7) en forme de U pour le positionnement sur la vis pédiculaire après mise en place de la tige spinale(8).  4 - Vertebral osteosynthesis device according to any one of claims 1 to 2 characterized in that the upper jaw (4b) has a recess (7) U-shaped for positioning on the pedicle screw after establishment of the spinal rod (8). 5 - Dispositif d'ostéosynthèse vertébrale selon l'une quelconque des revendications 1 à 4 caractérisé en ce la paroi intérieure des mâchoires est pourvue d'empreintes pour faciliter le serrage de la tige. 5 - Vertebral osteosynthesis device according to any one of claims 1 to 4 characterized in that the inner wall of the jaws is provided with imprints to facilitate the tightening of the rod. 6 - Procédé de mise en place d'un dispositif d'ostéosynthèse vertébrale selon l'une quelconque des revendications 1 à 5 caractérisé en ce que l'on met en place successivement la vis pédiculaire (1) par vissage dans la vertèbre, l'étrier (4) par positionnement de la mâchoire inférieure (4a) par l'intermédiaire du perçage (6) sur la partie (lb) de la vis, la tige spinale(8) sur la mâchoire 6 - Method for setting up a vertebral osteosynthesis device according to any one of claims 1 to 5 characterized in that one successively sets up the pedicle screw (1) by screwing into the vertebra, the stirrup (4) by positioning the lower jaw (4a) by means of the hole (6) on the part (lb) of the screw, the spinal rod (8) on the jaw (4a), puis l'on referme la mâchoire supérieure (4b) sur la mâchoire (4b) en enserrant la tige, fixe les mâchoires à la vis pédiculaire par l'écrou (3) et enfin l'on enserre et ancre l'ensemble par l'écrou (9) de la vis pédiculaire.  (4a), then close the upper jaw (4b) on the jaw (4b) by enclosing the rod, fix the jaws to the pedicle screw by the nut (3) and finally we enclose and anchor the together by the nut (9) of the pedicle screw.
FR9414587A 1994-12-05 1994-12-05 Vertebral osteosynthesis system for supporting or mending vertebrae Granted FR2727620A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR9414587A FR2727620A1 (en) 1994-12-05 1994-12-05 Vertebral osteosynthesis system for supporting or mending vertebrae

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR9414587A FR2727620A1 (en) 1994-12-05 1994-12-05 Vertebral osteosynthesis system for supporting or mending vertebrae

Publications (2)

Publication Number Publication Date
FR2727620A1 true FR2727620A1 (en) 1996-06-07
FR2727620B3 FR2727620B3 (en) 1997-02-14

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ID=9469474

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Application Number Title Priority Date Filing Date
FR9414587A Granted FR2727620A1 (en) 1994-12-05 1994-12-05 Vertebral osteosynthesis system for supporting or mending vertebrae

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FR (1) FR2727620A1 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1999052462A3 (en) * 1998-04-09 2000-02-10 Surgicarft Ltd Implantable clamp and fixation system
WO2002045607A1 (en) * 2000-12-07 2002-06-13 Spine Next Device for fixing a rod and a spherical symmetry screw head
WO2003034930A1 (en) * 2001-10-23 2003-05-01 Biedermann Motech Gmbh Bone fixation device and screw therefor

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1999052462A3 (en) * 1998-04-09 2000-02-10 Surgicarft Ltd Implantable clamp and fixation system
WO2002045607A1 (en) * 2000-12-07 2002-06-13 Spine Next Device for fixing a rod and a spherical symmetry screw head
FR2817929A1 (en) * 2000-12-07 2002-06-14 Spine Next Sa DEVICE FOR FIXING A ROD AND A SPHERICAL SYMMETRY SCREW HEAD
AU2002217205B2 (en) * 2000-12-07 2006-01-12 Zimmer Spine Device for fixing a rod and a spherical symmetry screw head
US7166108B2 (en) 2000-12-07 2007-01-23 Abbott Spine Device for fixing a rod and a spherical symmetry screw head
WO2003034930A1 (en) * 2001-10-23 2003-05-01 Biedermann Motech Gmbh Bone fixation device and screw therefor
US7166109B2 (en) 2001-10-23 2007-01-23 Biedermann Motech Gmbh Bone fixation device and screw therefor
EP2238934A1 (en) * 2001-10-23 2010-10-13 Biedermann Motech GmbH Bone fixation device and screw for such
US8052725B2 (en) 2001-10-23 2011-11-08 Biedermann Motech Gmbh Bone fixation device and screw therefor

Also Published As

Publication number Publication date
FR2727620B3 (en) 1997-02-14

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