WO2005037115A1 - Device for occipital fixation - Google Patents

Device for occipital fixation Download PDF

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Publication number
WO2005037115A1
WO2005037115A1 PCT/FR2004/002591 FR2004002591W WO2005037115A1 WO 2005037115 A1 WO2005037115 A1 WO 2005037115A1 FR 2004002591 W FR2004002591 W FR 2004002591W WO 2005037115 A1 WO2005037115 A1 WO 2005037115A1
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WO
WIPO (PCT)
Prior art keywords
fixation device
hook
occipital fixation
occipital
hooking
Prior art date
Application number
PCT/FR2004/002591
Other languages
French (fr)
Inventor
Alexis Faure
Deborah Alexandre
Pascal Rokegem
Eric Leroy
Original Assignee
Eurosurgical
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
Priority claimed from FR0311982A external-priority patent/FR2860703B1/en
Application filed by Eurosurgical filed Critical Eurosurgical
Publication of WO2005037115A1 publication Critical patent/WO2005037115A1/en

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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
    • A61B17/7055—Spinal positioners or stabilisers ; Bone stabilisers comprising fluid filler in an implant connected to sacrum, pelvis or skull
    • 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

Definitions

  • the present invention relates to a fixation device with an occipital hook which completes the range of implants allowing the posterior fixation of the cervical vertebrae of a vertebral column.
  • Fixing devices are known such as occipital plates which are intended to cooperate with posterior cervical instrumentation.
  • the occipital plate has a curved or banana-shaped profile turned to the left or right depending on its position of fixation on the occiput.
  • the occipital plate cooperates via a connection device to the cervical instrumentation and more particularly to the connection rod connecting all of the bone anchoring devices.
  • the plate is pierced with a certain number of holes intended to each receive a bone anchoring screw coming to anchor in the occiput.
  • the occipital fixation device is intended to cooperate with the connecting rod of a spinal device comprising bone anchoring elements which are fixed in the vertebral bodies of a vertebral column.
  • the fixation device of the occipital hook type comprises a first element which consists of fixing means for immobilization in translation and in rotation of the connecting rod and hooking means for bone anchoring in the occiput and a second sliding element in the first and which comprises hooking means complementing the hooking means of the first element to obtain the bone anchoring of the fixing device in the occiput.
  • the occipital hook type fixing device comprises a first element provided with fixing means for immobilization in translation and in rotation of the connecting rod which consist of a cylindrical body having a threaded external profile, d 'a central oblong housing cutting, in a vertical direction, the cylindrical body into two separate parts for the reception of the connecting rod and a clamping nut for blocking the connecting rod in the first element.
  • the occipital hook type fastening device comprises a first element comprising hooking means which are formed in the extension of the cylindrical body of a disc secured, on either side of a central groove, of two blades with a hook-shaped profile.
  • the occipital hook type fastening device comprises a first element having a central groove which is open in its upper part and directed in a direction perpendicular to that of the oblong housing formed in the cylindrical body.
  • the occipital hook type fixing device comprises a first element comprising a central groove which has a T-shaped or dovetail profile comprising in its upper part and on either side of the axis sliding the longitudinal stops for retaining, in a vertical direction, the second element of complementary shape.
  • the occipital hook type fixing device comprises a first element comprising hook blades which are arranged in parallel planes separated by a distance whose dimensions are similar to those separating the longitudinal stops from the groove.
  • the occipital hook type fixing device comprises a first element comprising hook blades which have hooking parts arranged in parallel planes above the central groove and directed in the same direction.
  • the occipital hook type fixing device comprises a second element which consists of an elongated body in which is formed over its entire length a longitudinal slot delimiting two parallel crosspieces, said elongated body being integral in its upper part and in a vertical direction of a blade having a hooking hooking portion which is arranged above the horizontal crosspieces.
  • the occipital hook type fixing device comprises a second element comprising a hook blade which is offset laterally from the center of the elongated body.
  • the occipital hook type fixing device comprises a second element comprising a hook blade having a thickness which is less than the distance separating the hook blades from the first element.
  • the occipital hook-type fixing device comprises a second element comprising an elongated body whose longitudinal slot extends inside and over part of the height of the hook blade, making it possible to give a certain elasticity between the two crosspieces of said elongated body.
  • the occipital hook type fixing device comprises a second element comprising crosspieces having an external profile which is complementary to that of the groove made in the disc of the first element in order to allow the sliding of the second element in the first.
  • Figures 1 and 2 are perspective views illustrating the mounting on a spine and more particularly at the occiput of a spinal device comprising an occipital hook device according to the present invention.
  • Figure 3 is an exploded perspective view showing the occipital hook device according to the present invention.
  • Figure 4 is a view showing a first hook element of the occipital device according to the present invention.
  • Figure 5 is a view illustrating a second hook element of the occipital device according to the present invention.
  • Figure 6 is a perspective view showing the assembly of the first and second hook elements of the occipital device according to the present invention.
  • Figures 7 and 8 are views showing the mounting of the occipital hook device and more particularly the possibility of sliding of the second hook element relative to the first hook element.
  • FIGS. 1 and 2 show a spinal device 1 comprising bone anchoring elements 2 which are fixed in the vertebral bodies 3 of a vertebral column 4 and connected together by means of a connecting rod 5.
  • Each connecting rod 5 is immobilized in translation and in rotation in the corresponding anchoring elements 2, by means of a clamping device 6.
  • the spinal device 1 comprises hook fixing devices 7 making it possible to retain, after drilling holes 9 in the bone occiput 8, each connecting rod 5.
  • FIGS. 3 to 6 show the different elements constituting the hook fixing device 7 for retaining each connecting rod 5 at the level of the bone occiput 8.
  • the fixing device 7 comprises a first hook element 10 consisting of a cylindrical body 11 having a threaded external profile 12 and a central housing 13 of oblong shape cutting in a vertical direction the cylindrical body in two distinct parts for the reception of the connecting rod 5 of the spinal device 1.
  • the cylindrical body 11 is secured at one of its ends to a disc 14 crossed by a central groove 15 open in its upper part and directed in a direction perpendicular to that of the oblong housing 13.
  • the central groove 15 has a T-shaped or dovetail profile comprising in its upper part and on either side of the sliding axis of the longitudinal stops 16, 17 making it possible to retain a second element in a vertical direction. hook 18 of complementary shape.
  • the disc 14 is secured on either side of the groove 15 and in a vertical direction opposite to that of the cylindrical body 11 of two blades 19, 20 having a profile in the form of hooks.
  • the hook blades 19, 20 are arranged in parallel planes separated by a distance, the dimensions of which are similar to those separating the longitudinal stops 16, 17 from the groove 15.
  • the hooking parts 27, 28 of each blade 19, 20 are arranged in parallel planes above the central groove 15 and directed in the same direction.
  • the external threaded profile 12 of the cylindrical body 11 is provided to cooperate with a nut 21 allowing the locking of the connecting rod 5 inside the housing 13 and against its bottom 30 in the form of a portion of a cylinder or U.
  • the bottom 30 of the housing 13 is pierced with an opening or window 31 communicating with the central groove 15 of the disc 14 (FIG. 6).
  • This opening is obtained by machining the housing 13 and more particularly its bottom 30, the radius of curvature of which exceeds the bottom of the groove 15 of the disc 14 so that the latter communicates with the housing 13.
  • the fixing device 7 comprises a second hook element 18 consisting of an elongated body 22 in which a longitudinal slot 23 is delimited over its entire length 23 delimiting two parallel crosspieces 24, 25.
  • the elongated body 22 and more particularly the crosspieces 24, 25 have an external profile which is complementary to that of the groove 15 formed in the disc 14 of the first hook element 10 in order to allow the sliding of the second hook element 18 in the first .
  • the elongated body 22 is integral in its upper part and in a vertical direction with a blade 26 having a hook-shaped profile, the hooking part 29 of which is disposed above the horizontal crosspieces 24, 25.
  • the longitudinal slot 23 extends inside and over part of the height of the blade 26 making it possible to give a certain elasticity between the two crosspieces 24, 25 of the elongated body 22.
  • the blade 26 is offset laterally from the center of the elongated body 22 forming the second hook element 18. It is noted that the hook blade 26 of the second element 18 has a thickness or a width which is less than the distance separating the hook blades 19, 20 from the first element 10.
  • the assembly of the device has been shown in FIGS. 7 and 8. fixing 7 on the connecting rod 5 and the sliding of the first and second hook elements 10, 18 relative to each other.
  • the fixing device 7 is assembled so that the elongated body 22 of the second hook element 18 slides in the central groove 15 of the first hook element 10.
  • the hook blade 26 of the second hook element 18 is positioned relative to the hook blades 19, 20 of the first hook element 10 so that the tip of the hooking portion 29 of the hook blade 26 does not exceed the vertical part of the hook blades 19, 20 ( Figure 7).
  • this position of the hook blades 19, 20 and 26 relative to each other allows the introduction of the latter into the corresponding hole 9 formed in the bone occiput 8. Then, by means of a surgical instrument adapted, the first and second hook elements 10, 18 are moved relative to each other until the hooking portions 27, 28 and 29 of each hook blade 19, 20 and 26 come s 'anchor in the part or on the bone and internal surface of the occiput bordering the corresponding hole 9 ( Figures 2 and 8).
  • each hook blade 19, 20 and 26 have an inclined internal profile improving the anchoring of each hook blade in the bone part of the occiput 8.
  • the introduction of the second hook element 18 inside the groove 15 of the first hook element 10 is obtained by the elastic deformation of the parallel crosspieces 24, 25 of the elongated body 22 constituting a primary stabilization of the hooking parts 27, 28 and 29 of each hook blade 19, 20 and 26 in the hole 9.

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  • Health & Medical Sciences (AREA)
  • Orthopedic Medicine & Surgery (AREA)
  • Surgery (AREA)
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  • Life Sciences & Earth Sciences (AREA)
  • Biomedical Technology (AREA)
  • Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
  • Engineering & Computer Science (AREA)
  • Neurosurgery (AREA)
  • Heart & Thoracic Surgery (AREA)
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  • Molecular Biology (AREA)
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Abstract

The invention relates to a device for occipital fixation, comprising a first element (10), made up of fixation means for the translational and rotational immobilisation of a connection rod (5) and attachment means (19, 20), for anchoring in the occipital bone (8) and a second element (18), sliding within the first and comprising attachment means (26), complementary to the attachment means (19, 20) of the first element (10), for anchoring the fixation device (7) in the occipital bone (8).

Description

DISPOSITIF DE FIXATION OCCIPITALE OCCIPITAL FIXING DEVICE
La présente invention est relative à un dispositif de fixation à crochet occipital venant compléter la gamme d'implants permettant la fixation postérieure des vertèbres cervicales d'une colonne vertébrale.The present invention relates to a fixation device with an occipital hook which completes the range of implants allowing the posterior fixation of the cervical vertebrae of a vertebral column.
On connaît des dispositifs de fixation tels que des plaques occipitales qui sont destinées à coopérer avec une instrumentation cervicale postérieure. La plaque occipitale présente un profil courbe ou en forme de banane tourné à gauche ou droite en fonction de sa position de fixation sur l'occiput.Fixing devices are known such as occipital plates which are intended to cooperate with posterior cervical instrumentation. The occipital plate has a curved or banana-shaped profile turned to the left or right depending on its position of fixation on the occiput.
La plaque occipitale coopère par l'intermédiaire d'un dispositif de liaison à l'instrumentation cervicale et plus particulièrement à la tige de liaison reliant l'ensemble des dispositifs d'ancrage osseux.The occipital plate cooperates via a connection device to the cervical instrumentation and more particularly to the connection rod connecting all of the bone anchoring devices.
La plaque est percée d'un certain nombre de trous destinés à recevoir chacun une vis d'ancrage osseux venant s'ancrer dans l'occiput.The plate is pierced with a certain number of holes intended to each receive a bone anchoring screw coming to anchor in the occiput.
Le dispositif de fixation occipitale suivant la présente invention est prévu pour coopérer avec la tige de liaison d'un dispositif rachidien comportant des éléments d'ancrage osseux qui sont fixés dans les corps vertébraux d'une colonne vertébrale.The occipital fixation device according to the present invention is intended to cooperate with the connecting rod of a spinal device comprising bone anchoring elements which are fixed in the vertebral bodies of a vertebral column.
Le dispositif de fixation de type crochet occipital suivant la présente invention comprend un premier élément qui est constitué de moyens de fixation pour l'immobilisation en translation et en rotation de la tige de liaison et de moyens d'accrochage pour l'ancrage osseux dans l'occiput et un second élément coulissant dans le premier et qui comporte des moyens d'accrochage venant compléter les moyens d'accrochage du premier élément pour obtenir l'ancrage osseux du dispositif de fixation dans l'occiput.The fixation device of the occipital hook type according to the present invention comprises a first element which consists of fixing means for immobilization in translation and in rotation of the connecting rod and hooking means for bone anchoring in the occiput and a second sliding element in the first and which comprises hooking means complementing the hooking means of the first element to obtain the bone anchoring of the fixing device in the occiput.
Le dispositif de fixation de type crochet occipital suivant la présente invention comprend un premier élément pourvu de moyens de fixation pour l'immobilisation en translation et en rotation de la tige de liaison qui sont constitués d'un corps cylindrique présentant un profil externe fileté, d'un logement central de forme oblongue coupant, suivant une direction verticale, le corps cylindrique en deux parties distinctes pour la réception de la tige de liaison et d'un écrou de serrage permettant le blocage de la tige de liaison dans le premier élément.The occipital hook type fixing device according to the present invention comprises a first element provided with fixing means for immobilization in translation and in rotation of the connecting rod which consist of a cylindrical body having a threaded external profile, d 'a central oblong housing cutting, in a vertical direction, the cylindrical body into two separate parts for the reception of the connecting rod and a clamping nut for blocking the connecting rod in the first element.
Le dispositif de fixation de type crochet occipital suivant la présente invention comprend un premier élément comportant des moyens d'accrochage qui sont constitués dans le prolongement du corps cylindrique d'un disque solidaire, de part et d'autre d'une rainure centrale, de deux lames présentant un profil en forme de crochets.The occipital hook type fastening device according to the present invention comprises a first element comprising hooking means which are formed in the extension of the cylindrical body of a disc secured, on either side of a central groove, of two blades with a hook-shaped profile.
Le dispositif de fixation de type crochet occipital suivant la présente invention comprend un premier élément comportant une rainure centrale qui est ouverte dans sa partie supérieure et dirigée suivant une direction perpendiculaire à celle du logement oblong ménagé dans le corps cylindrique.The occipital hook type fastening device according to the present invention comprises a first element having a central groove which is open in its upper part and directed in a direction perpendicular to that of the oblong housing formed in the cylindrical body.
Le dispositif de fixation de type crochet occipital suivant la présente invention comprend un premier élément comportant une rainure centrale qui présente un profil en forme de T ou en queue d'aronde comprenant dans sa partie supérieure et de part et d'autre de l'axe de coulissement des butées longitudinales permettant de retenir, selon une direction verticale, le second élément de forme complémentaire.The occipital hook type fixing device according to the present invention comprises a first element comprising a central groove which has a T-shaped or dovetail profile comprising in its upper part and on either side of the axis sliding the longitudinal stops for retaining, in a vertical direction, the second element of complementary shape.
Le dispositif de fixation de type crochet occipital suivant la présente invention comprend un premier élément comportant des lames à crochets qui sont disposées dans des plans parallèles séparés d'une distance dont les dimensions sont semblables à celles séparant les butées longitudinales de la rainure.The occipital hook type fixing device according to the present invention comprises a first element comprising hook blades which are arranged in parallel planes separated by a distance whose dimensions are similar to those separating the longitudinal stops from the groove.
Le dispositif de fixation de type crochet occipital suivant la présente invention comprend un premier élément comportant des lames à crochet qui comportent des parties d'accrochage disposées dans des plans parallèles au-dessus de la rainure centrale et dirigées dans une même direction.The occipital hook type fixing device according to the present invention comprises a first element comprising hook blades which have hooking parts arranged in parallel planes above the central groove and directed in the same direction.
Le dispositif de fixation de type crochet occipital suivant la présente invention comprend un second élément qui est constitué d'un corps allongé dans lequel est ménagée sur toute sa longueur une fente longitudinale délimitant deux traverses parallèles, ledit corps allongé étant solidaire dans sa partie supérieure et suivant une direction verticale d'une lame présentant une partie d'accrochage en forme de crochet qui est disposée au-dessus des traverses horizontales.The occipital hook type fixing device according to the present invention comprises a second element which consists of an elongated body in which is formed over its entire length a longitudinal slot delimiting two parallel crosspieces, said elongated body being integral in its upper part and in a vertical direction of a blade having a hooking hooking portion which is arranged above the horizontal crosspieces.
Le dispositif de fixation de type crochet occipital suivant la présente invention comprend un second élément comportant une lame à crochet qui est décalée latéralement du centre du corps allongé.The occipital hook type fixing device according to the present invention comprises a second element comprising a hook blade which is offset laterally from the center of the elongated body.
Le dispositif de fixation de type crochet occipital suivant la présente invention comprend un second élément comportant une lame à crochet présentant une épaisseur qui est inférieure à la distance séparant les lames à crochet du premier élément.The occipital hook type fixing device according to the present invention comprises a second element comprising a hook blade having a thickness which is less than the distance separating the hook blades from the first element.
Le dispositif de fixation de type crochet occipital suivant la présente invention comprend un second élément comportant un corps allongé dont la fente longitudinale se prolonge à l'intérieur et sur une partie de la hauteur de la lame à crochet, permettant de donner une certaine élasticité entre les deux traverses dudit corps allongé.The occipital hook-type fixing device according to the present invention comprises a second element comprising an elongated body whose longitudinal slot extends inside and over part of the height of the hook blade, making it possible to give a certain elasticity between the two crosspieces of said elongated body.
Le dispositif de fixation de type crochet occipital suivant la présente invention comprend un second élément comportant des traverses présentant un profil externe qui est complémentaire à celui de la rainure ménagée dans le disque du premier élément afin de permettre le coulissement du second élément dans le premier. La description qui va suivre en regard des dessins annexés, donnés à titre d'exemples non limitatifs, permettra de mieux comprendre l'invention, les caractéristiques qu'elle présente et les avantages qu'elle est susceptible de procurer :The occipital hook type fixing device according to the present invention comprises a second element comprising crosspieces having an external profile which is complementary to that of the groove made in the disc of the first element in order to allow the sliding of the second element in the first. The description which follows with reference to the appended drawings, given by way of nonlimiting examples, will allow a better understanding of the invention, the characteristics which it presents and the advantages which it is capable of providing:
Figures 1 et 2 sont des vues en perspective illustrant le montage sur une colonne vertébrale et plus particulièrement au niveau de l'occiput d'un dispositif rachidien comportant un dispositif à crochet occipital suivant la présente invention. Figure 3 est une vue en perspective éclatée montrant le dispositif à crochet occipital suivant la présente invention.Figures 1 and 2 are perspective views illustrating the mounting on a spine and more particularly at the occiput of a spinal device comprising an occipital hook device according to the present invention. Figure 3 is an exploded perspective view showing the occipital hook device according to the present invention.
Figure 4 est une vue représentant un premier élément à crochet du dispositif occipital suivant la présente invention.Figure 4 is a view showing a first hook element of the occipital device according to the present invention.
Figure 5 est une vue illustrant un second élément à crochet du dispositif occipital suivant la présente invention.Figure 5 is a view illustrating a second hook element of the occipital device according to the present invention.
Figure 6 est une vue en perspective représentant l'assemblage des premiers et seconds éléments à crochet du dispositif occipital suivant la présente invention.Figure 6 is a perspective view showing the assembly of the first and second hook elements of the occipital device according to the present invention.
Figures 7 et 8 sont des vues montrant le montage du dispositif à crochet occipital et plus particulièrement la possibilité de coulissement du second élément à crochet par rapport au premier élément à crochet.Figures 7 and 8 are views showing the mounting of the occipital hook device and more particularly the possibility of sliding of the second hook element relative to the first hook element.
On a montré en figures 1 et 2 un dispositif rachidien 1 comportant des éléments d'ancrage osseux 2 qui sont fixés dans les corps vertébraux 3 d'une colonne vertébrale 4 et reliés entre eux par l'intermédiaire d'une tige de liaison 5. Chaque tige de liaison 5 est immobilisée en translation et en rotation dans les éléments d'ancrage 2 correspondants, au moyen d'un dispositif de serrage 6.FIGS. 1 and 2 show a spinal device 1 comprising bone anchoring elements 2 which are fixed in the vertebral bodies 3 of a vertebral column 4 and connected together by means of a connecting rod 5. Each connecting rod 5 is immobilized in translation and in rotation in the corresponding anchoring elements 2, by means of a clamping device 6.
Le dispositif rachidien 1 comporte des dispositifs de fixation à crochet 7 permettant de retenir, après le perçage de trous 9 dans l'occiput osseux 8, chaque tige de liaison 5.The spinal device 1 comprises hook fixing devices 7 making it possible to retain, after drilling holes 9 in the bone occiput 8, each connecting rod 5.
On a représenté en figures 3 à 6 les différents éléments constituant le dispositif de fixation à crochet 7 pour la retenue de chaque tige de liaison 5 au niveau de l'occiput osseux 8.FIGS. 3 to 6 show the different elements constituting the hook fixing device 7 for retaining each connecting rod 5 at the level of the bone occiput 8.
Le dispositif de fixation 7 comporte un premier élément à crochet 10 constitué d'un corps cylindrique 11 présentant un profil externe fileté 12 et un logement central 13 de forme oblongue coupant suivant une direction verticale le corps cylindrique en deux parties distinctes pour la réception de la tige de liaison 5 du dispositif rachidien 1.The fixing device 7 comprises a first hook element 10 consisting of a cylindrical body 11 having a threaded external profile 12 and a central housing 13 of oblong shape cutting in a vertical direction the cylindrical body in two distinct parts for the reception of the connecting rod 5 of the spinal device 1.
Le corps cylindrique 11 est solidaire à l'une de ses extrémités d'un disque 14 traversé par une rainure centrale 15 ouverte dans sa partie supérieure et dirigée suivant une direction perpendiculaire à celle du logement oblong 13. La rainure centrale 15 présente un profil en T ou en queue d'aronde comportant dans sa partie supérieure et de part et d'autre de l'axe de coulissement des butées longitudinales 16, 17 permettant de retenir selon une direction verticale un second élément à crochet 18 de forme complémentaire.The cylindrical body 11 is secured at one of its ends to a disc 14 crossed by a central groove 15 open in its upper part and directed in a direction perpendicular to that of the oblong housing 13. The central groove 15 has a T-shaped or dovetail profile comprising in its upper part and on either side of the sliding axis of the longitudinal stops 16, 17 making it possible to retain a second element in a vertical direction. hook 18 of complementary shape.
Le disque 14 est solidaire de part et d'autre de la rainure 15 et suivant une direction verticale et opposée à celle du corps cylindrique 11 de deux lames 19, 20 présentant un profil en forme de crochets.The disc 14 is secured on either side of the groove 15 and in a vertical direction opposite to that of the cylindrical body 11 of two blades 19, 20 having a profile in the form of hooks.
Les lames à crochets 19, 20 sont disposées dans des plans parallèles séparés d'une distance dont les dimensions sont semblables à celles séparant les butées longitudinales 16, 17 de la rainure 15. Les parties d'accrochage 27, 28 de chaque lame 19, 20 sont disposées dans des plans parallèles au-dessus de la rainure centrale 15 et dirigées dans une même direction.The hook blades 19, 20 are arranged in parallel planes separated by a distance, the dimensions of which are similar to those separating the longitudinal stops 16, 17 from the groove 15. The hooking parts 27, 28 of each blade 19, 20 are arranged in parallel planes above the central groove 15 and directed in the same direction.
Le profil externe fileté 12 du corps cylindrique 11 est prévu pour coopérer avec un écrou 21 permettant le blocage de la tige de liaison 5 à l'intérieur du logement 13 et contre son fond 30 eh forme de portion de cylindre ou de U.The external threaded profile 12 of the cylindrical body 11 is provided to cooperate with a nut 21 allowing the locking of the connecting rod 5 inside the housing 13 and against its bottom 30 in the form of a portion of a cylinder or U.
Le fond 30 du logement 13 est percé d'une ouverture ou fenêtre 31 communiquant avec la rainure centrale 15 du disque 14 (figure 6). Cette ouverture est obtenue par l'usinage du logement 13 et plus particulièrement de son fond 30 dont le rayon de courbure dépasse le fond de la rainure 15 du disque 14 afin que cette dernière communique avec le logement 13.The bottom 30 of the housing 13 is pierced with an opening or window 31 communicating with the central groove 15 of the disc 14 (FIG. 6). This opening is obtained by machining the housing 13 and more particularly its bottom 30, the radius of curvature of which exceeds the bottom of the groove 15 of the disc 14 so that the latter communicates with the housing 13.
Le dispositif de fixation 7 comporte un second élément à crochet 18 constitué d'un corps allongé 22 dans lequel est aménagé sur toute sa longueur une fente longitudinale 23 délimitant deux traverses parallèles 24, 25.The fixing device 7 comprises a second hook element 18 consisting of an elongated body 22 in which a longitudinal slot 23 is delimited over its entire length 23 delimiting two parallel crosspieces 24, 25.
Le corps allongé 22 et plus particulièrement les traverses 24, 25 présentent un profil externe qui est complémentaire à celui de la rainure 15 ménagée dans le disque 14 du premier élément à crochet 10 afin de permettre le coulissement du second élément à crochet 18 dans le premier.The elongated body 22 and more particularly the crosspieces 24, 25 have an external profile which is complementary to that of the groove 15 formed in the disc 14 of the first hook element 10 in order to allow the sliding of the second hook element 18 in the first .
Le corps allongé 22 est solidaire dans sa partie supérieure et suivant une direction verticale d'une lame 26 présentant un profil en forme de crochet dont la partie d'accrochage 29 est disposée au-dessus des traverses horizontales 24, 25.The elongated body 22 is integral in its upper part and in a vertical direction with a blade 26 having a hook-shaped profile, the hooking part 29 of which is disposed above the horizontal crosspieces 24, 25.
On note que la fente longitudinale 23 se prolonge à l'intérieur et sur une partie de la hauteur de la lame 26 permettant de donner une certaine élasticité entre les deux traverses 24, 25 du corps allongé 22.It should be noted that the longitudinal slot 23 extends inside and over part of the height of the blade 26 making it possible to give a certain elasticity between the two crosspieces 24, 25 of the elongated body 22.
Egalement, la lame 26 est décalée latéralement du centre du corps allongé 22 formant le second élément à crochet 18. On note que la lame à crochet 26 du second élément 18 présente une épaisseur ou une largeur qui est inférieure à la distance séparant les lames à crochet 19, 20 du premier élément 10. On a montré en figures 7 et 8 le montage du dispositif de fixation 7 sur la tige de liaison 5 et le coulissement des premiers et seconds éléments à crochet 10, 18 l'un par rapport à l'autre.Also, the blade 26 is offset laterally from the center of the elongated body 22 forming the second hook element 18. It is noted that the hook blade 26 of the second element 18 has a thickness or a width which is less than the distance separating the hook blades 19, 20 from the first element 10. The assembly of the device has been shown in FIGS. 7 and 8. fixing 7 on the connecting rod 5 and the sliding of the first and second hook elements 10, 18 relative to each other.
Le dispositif de fixation 7 est assemblé de manière que le corps allongé 22 du second élément à crochet 18 coulisse dans la rainure centrale 15 du premier élément à crochet 10.The fixing device 7 is assembled so that the elongated body 22 of the second hook element 18 slides in the central groove 15 of the first hook element 10.
La lame à crochet 26 du second élément à crochet 18 est positionnée par rapport aux lames à crochet 19, 20 du premier élément à crochet 10 de manière que la pointe de la partie d'accrochage 29 de la lame à crochet 26 ne dépasse pas la partie verticale des lames à crochet 19, 20 (figure 7).The hook blade 26 of the second hook element 18 is positioned relative to the hook blades 19, 20 of the first hook element 10 so that the tip of the hooking portion 29 of the hook blade 26 does not exceed the vertical part of the hook blades 19, 20 (Figure 7).
Dans cette position, les parties d'accrochage 27, 28 et 29 de chaque lame à crochet 19, 20 et 26 sont protégées par la partie verticale de l'autre lame.In this position, the hooking parts 27, 28 and 29 of each hook blade 19, 20 and 26 are protected by the vertical part of the other blade.
Egalement, cette position des lames à crochet 19, 20 et 26 les unes par rapport aux autres permet l'introduction de ces dernières dans le trou 9 correspondant ménagé dans l'occiput osseux 8. Ensuite, par l'intermédiaire d'un instrument chirurgical adapté, les premiers et seconds éléments à crochet 10, 18 sont déplacés l'un par rapport à l'autre jusqu'à ce que les parties d'accrochage 27, 28 et 29 de chaque lame à crochet 19, 20 et 26 viennent s'ancrer dans la partie ou sur la surface osseuse et interne de l'occiput bordant le trou 9 correspondant (figures 2 et 8).Also, this position of the hook blades 19, 20 and 26 relative to each other allows the introduction of the latter into the corresponding hole 9 formed in the bone occiput 8. Then, by means of a surgical instrument adapted, the first and second hook elements 10, 18 are moved relative to each other until the hooking portions 27, 28 and 29 of each hook blade 19, 20 and 26 come s 'anchor in the part or on the bone and internal surface of the occiput bordering the corresponding hole 9 (Figures 2 and 8).
On note que les parties d'accrochage 27, 28 et 29 de chaque lame à crochet 19, 20 et 26 présentent un profil interne incliné améliorant l'ancrage de chaque lame à crochet dans la partie osseuse de l'occiput 8. D'autre part, l'introduction du second élément à crochet 18 à l'intérieur de la rainure 15 du premier élément à crochet 10 est obtenue par la déformation élastique des traverses parallèles 24, 25 du corps allongé 22 constituant une stabilisation primaire des parties d'accrochage 27, 28 et 29 de chaque lame à crochet 19, 20 et 26 dans le trou 9.Note that the hooking parts 27, 28 and 29 of each hook blade 19, 20 and 26 have an inclined internal profile improving the anchoring of each hook blade in the bone part of the occiput 8. On the other hand hand, the introduction of the second hook element 18 inside the groove 15 of the first hook element 10 is obtained by the elastic deformation of the parallel crosspieces 24, 25 of the elongated body 22 constituting a primary stabilization of the hooking parts 27, 28 and 29 of each hook blade 19, 20 and 26 in the hole 9.
On note que le corps allongé 22 du second élément à crochet 18 traverse l'ouverture ou fenêtre 31 ménagée dans le fond 30 du logement 13 (figure 6).Note that the elongated body 22 of the second hook element 18 passes through the opening or window 31 formed in the bottom 30 of the housing 13 (Figure 6).
Dès que les premiers et seconds éléments à crochet 10, 18 du dispositif de fixation 7 sont fixés dans le trou correspondant 9, le chirurgien présente après déformation une tige de liaison 5 pour venir l'introduire à l'intérieur du logement 13 du premier élément à crochet 10. Lorsque la tige de liaison 5 correspondante est introduite dans le logement 13, cette dernière est immobilisée en translation et en rotation par l'intermédiaire de l'écrou 21 qui est vissé sur le corps cylindrique 11 du premier élément à crochet 10.As soon as the first and second hook elements 10, 18 of the fixing device 7 are fixed in the corresponding hole 9, the surgeon presents, after deformation, a connecting rod 5 to come and introduce it inside the housing 13 of the first element hook 10. When the corresponding connecting rod 5 is introduced into the housing 13, the latter is immobilized in translation and in rotation by means of the nut 21 which is screwed onto the cylindrical body 11 of the first hook element 10.
Le serrage de l'écrou 21 permet de bloquer la tige 5 dans le fond 30 du logement 13 entraînant simultanément l'immobilisation des traverses parallèles 24, 25 du corps allongé 22 dans la rainure 15. En effet, la tige de liaison 5 lors de son blocage vient en contact serré contre les traverses 24, 25 immobilisant ces dernières en translation à l'intérieur de la rainure 15 du fait de l'ouverture ou fenêtre 31 qui permet de réaliser une communication entre les fonds de la rainure 15 et celui 30 du logement 13. II doit d'ailleurs être entendu que la description qui précède n'a été donnée qu'à titre d'exemple et qu'elle ne limite nullement le domaine de l'invention dont on ne sortirait pas en remplaçant les détails d'exécutions décrits par tout autre équivalent. The tightening of the nut 21 makes it possible to block the rod 5 in the bottom 30 of the housing 13 simultaneously causing the immobilization of the parallel crosspieces 24, 25 of the elongated body 22 in the groove 15. In fact, the connecting rod 5 during its blocking comes into tight contact against the crosspieces 24, 25 immobilizing the latter in translation inside the groove 15 due to the opening or window 31 which allows communication between the bottoms of the groove 15 and that 30 housing 13. It should also be understood that the foregoing description has been given only by way of example and that it in no way limits the field of the invention from which one would not depart by replacing the details of executions described by any other equivalent.

Claims

REVENDICATIONS
1. Dispositif de fixation occipitale pour dispositif rachidien (1) comportant des éléments d'ancrage osseux (2) qui sont fixés dans les corps vertébraux (3) d'une colonne vertébrale (4) et reliés entre eux par l'intermédiaire d'une tige de liaison (5), caractérisé en ce qu'il comprend un premier élément (10) qui est constitué de moyens de fixation pour l'immobilisation en translation et en rotation de la tige de liaison (5) et de moyens d'accrochage (19, 20) pour l'ancrage osseux dans l'occiput (8) et un second élément (18) coulissant dans le premier et qui comporte des moyens d'accrochage (26) venant compléter les moyens d'accrochage (19, 20) du premier élément (10) pour obtenir l'ancrage osseux du dispositif de fixation (7) dans l'un des trous (9) percés dans l'occiput (8).1. Occipital fixation device for spinal device (1) comprising bone anchoring elements (2) which are fixed in the vertebral bodies (3) of a vertebral column (4) and interconnected by means of a connecting rod (5), characterized in that it comprises a first element (10) which consists of fixing means for immobilizing in translation and in rotation the connecting rod (5) and means of hooking (19, 20) for bone anchoring in the occiput (8) and a second element (18) sliding in the first and which comprises hooking means (26) coming to complement the hooking means (19, 20) of the first element (10) to obtain the bone anchoring of the fixing device (7) in one of the holes (9) drilled in the occiput (8).
2. Dispositif de fixation occipitale suivant la revendication 1 , caractérisé en ce que le premier élément (10) comporte des moyens de fixation pour l'immobilisation en translation et en rotation de la tige de liaison (5) qui sont constitués d'un corps cylindrique (11) présentant un profil externe fileté (12), d'un logement central (13) de forme oblongue coupant suivant une direction verticale le corps cylindrique en deux parties distinctes pour la réception de la tige de liaison (5) et d'un écrou de serrage (21) permettant le blocage de la tige de liaison (5) dans le premier élément (10).2. occipital fixation device according to claim 1, characterized in that the first element (10) comprises fixing means for immobilization in translation and in rotation of the connecting rod (5) which consist of a body cylindrical (11) having a threaded external profile (12), of an oblong central housing (13) cutting in a vertical direction the cylindrical body in two distinct parts for the reception of the connecting rod (5) and a tightening nut (21) allowing the locking of the connecting rod (5) in the first element (10).
3. Dispositif de fixation occipitale suivant la revendication 2, caractérisé en ce que le premier élément (10) comporte des moyens d'accrochage qui sont constitués dans le prolongement du corps cylindrique (11) d'un disque (14) solidaire de part et d'autre d'une rainure centrale (15) de deux lames (19, 20) présentant un profil en forme de crochets.3. Occipital fixation device according to claim 2, characterized in that the first element (10) comprises hooking means which are formed in the extension of the cylindrical body (11) of a disc (14) integral with the part and on the other a central groove (15) of two blades (19, 20) having a profile in the form of hooks.
4. Dispositif de fixation occipitale suivant la revendication 3, caractérisé en ce que la rainure centrale (15) est ouverte dans sa partie supérieure et dirigée suivant une direction perpendiculaire à celle du logement oblong (13) ménagé dans le corps cylindrique (11).4. Occipital fixation device according to claim 3, characterized in that the central groove (15) is open in its upper part and directed in a direction perpendicular to that of the oblong housing (13) formed in the cylindrical body (11).
5. Dispositif de fixation occipitale suivant la revendication 3, caractérisé en ce que la rainure centrale (15) présente un profil en forme de T ou en queue d'aronde comportant dans sa partie supérieure et de part et d'autre de l'axe de coulissement des butées longitudinales (16, 17) permettant de retenir selon une direction verticale le second élément (18) de forme complémentaire.5. Occipital fixation device according to claim 3, characterized in that the central groove (15) has a T-shaped or dovetail profile comprising in its upper part and on either side of the axis sliding the longitudinal stops (16, 17) for retaining in a vertical direction the second element (18) of complementary shape.
6. Dispositif de fixation occipitale suivant la revendication 3, caractérisé en ce que les lames à crochets (19, 20) sont disposées dans des plans parallèles séparés d'une distance dont les dimensions sont semblables à celles séparant les butées longitudinales (16, 17) de la rainure (15). 6. occipital fixation device according to claim 3, characterized in that the hook blades (19, 20) are arranged in parallel planes separated by a distance whose dimensions are similar to those separating the longitudinal stops (16, 17 ) of the groove (15).
7. Dispositif de fixation occipitale suivant la revendication 3, caractérisé en ce que les lames à crochet (19, 20) comportent des parties d'accrochage (27, 28) qui sont disposées dans des plans parallèles au-dessus de la rainure centrale (15) et dirigées dans une même direction.7. Occipital fixation device according to claim 3, characterized in that the hook blades (19, 20) have hooking parts (27, 28) which are arranged in parallel planes above the central groove ( 15) and directed in the same direction.
8. Dispositif de fixation occipitale suivant la revendication 1 , caractérisé en ce que le second élément (18) est constitué d'un corps allongé (22) dans lequel est ménagé sur toute sa longueur une fente longitudinale (23) délimitant deux traverses parallèles (24, 25), ledit corps allongé (22) étant solidaire dans sa partie supérieure et suivant une direction verticale d'une lame (26) présentant une partie d'accrochage (29) en forme de crochet qui est disposée au-dessus des traverses horizontales (24, 25).8. Occipital fixation device according to claim 1, characterized in that the second element (18) consists of an elongated body (22) in which is formed over its entire length a longitudinal slot (23) delimiting two parallel crosspieces ( 24, 25), said elongated body (22) being integral in its upper part and in a vertical direction of a blade (26) having a hooking hooking part (29) which is arranged above the crosspieces horizontal (24, 25).
9. Dispositif de fixation occipitale suivant la revendication 8, caractérisé en ce que la lame à crochet (26) est décalée latéralement du centre du corps allongé (22).9. Occipital fixation device according to claim 8, characterized in that the hook blade (26) is laterally offset from the center of the elongated body (22).
10. Dispositif de fixation occipitale suivant la revendication 8, caractérisé en ce que la lame à crochet (26) du second élément (18) présente une épaisseur qui est inférieure à la distance séparant les lames à crochet (19, 20) du premier élément (10).10. Occipital fixation device according to claim 8, characterized in that the hook blade (26) of the second element (18) has a thickness which is less than the distance separating the hook blades (19, 20) from the first element (10).
11. Dispositif de fixation occipitale suivant la revendication 8, caractérisé en ce que la fente longitudinale (23) se prolonge à l'intérieur et sur une partie de la hauteur de la lame à crochet (26) permettant de donner une certaine élasticité entre les deux traverses (24, 25) du corps allongé (22).11. Occipital fixation device according to claim 8, characterized in that the longitudinal slot (23) extends inside and over part of the height of the hook blade (26) making it possible to give a certain elasticity between the two crosspieces (24, 25) of the elongated body (22).
12. Dispositif de fixation occipitale suivant la revendication 8, caractérisé en ce que les traverses (24, 25) du corps allongé (22) présentent un profil externe qui est complémentaire à celui de la rainure (15) ménagée dans le disque (14) du premier élément (10) afin de permettre le coulissement du second élément (18) dans le premier.12. Occipital fixation device according to claim 8, characterized in that the crosspieces (24, 25) of the elongated body (22) have an external profile which is complementary to that of the groove (15) formed in the disc (14) of the first element (10) in order to allow the sliding of the second element (18) in the first.
13. Dispositif de fixation occipitale suivant la revendication 2, caractérisé en ce que le logement (13) comporte un fond (30) en forme de portion de cylindre comportant une ouverture ou fenêtre (31) débouchant dans la rainure (15) du disque (14). 13. Occipital fixation device according to claim 2, characterized in that the housing (13) comprises a bottom (30) in the form of a portion of cylinder comprising an opening or window (31) opening into the groove (15) of the disc ( 14).
PCT/FR2004/002591 2003-10-14 2004-10-13 Device for occipital fixation WO2005037115A1 (en)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
FR0311982 2003-10-14
FR0311982A FR2860703B1 (en) 2003-10-14 2003-10-14 OCCIPIENT FIXING DEVICE
US10/856,768 2004-06-01
US10/856,768 US20050080417A1 (en) 2003-10-14 2004-06-01 Occipital fixation device

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WO2007005561A2 (en) 2005-06-30 2007-01-11 Depuy Spine Sarl Orthopedic clamping hook assembly
WO2007087486A1 (en) * 2006-01-30 2007-08-02 Warsaw Orthopedic, Inc. Devices and methods for attaching a rod to a vertebral member
US20170181772A1 (en) * 2014-04-16 2017-06-29 Dynamic Spine, Llc Adjustable screw-clamp orthopedic apparatus

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FR2687561A1 (en) * 1992-02-20 1993-08-27 Jbs Sa Device for straightening, fixing, compressing and elongating cervical vertebrae
US5542946A (en) * 1994-05-27 1996-08-06 Sofamor S.N.C. Hook for an occipito-cervical rod or plate of an occipito-cervical osteosynthesis instrumentation
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WO2007005561A2 (en) 2005-06-30 2007-01-11 Depuy Spine Sarl Orthopedic clamping hook assembly
EP1895918A2 (en) * 2005-06-30 2008-03-12 DePuy Spine Sàrl Orthopedic clamping hook assembly
EP1895918A4 (en) * 2005-06-30 2010-03-31 Depuy Spine Sarl Orthopedic clamping hook assembly
US8177823B2 (en) 2005-06-30 2012-05-15 Depuy Spine Sarl Orthopedic clamping hook assembly
WO2007087486A1 (en) * 2006-01-30 2007-08-02 Warsaw Orthopedic, Inc. Devices and methods for attaching a rod to a vertebral member
US7803175B2 (en) 2006-01-30 2010-09-28 Warsaw Orthopedic, Inc. Devices and methods for attaching a rod to a vertebral member
US20170181772A1 (en) * 2014-04-16 2017-06-29 Dynamic Spine, Llc Adjustable screw-clamp orthopedic apparatus
US10709480B2 (en) * 2014-04-16 2020-07-14 Dynamic Spine, Llc Adjustable screw-clamp orthopedic apparatus

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