FR2900563A1 - Scoliosis rectification device for bone, has central module with toothed wheel whose rotation displaces rods in identical manner for extending scoliotic curvature in longitudinal direction and reducing curvature - Google Patents

Scoliosis rectification device for bone, has central module with toothed wheel whose rotation displaces rods in identical manner for extending scoliotic curvature in longitudinal direction and reducing curvature Download PDF

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FR2900563A1
FR2900563A1 FR0604044A FR0604044A FR2900563A1 FR 2900563 A1 FR2900563 A1 FR 2900563A1 FR 0604044 A FR0604044 A FR 0604044A FR 0604044 A FR0604044 A FR 0604044A FR 2900563 A1 FR2900563 A1 FR 2900563A1
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rods
scoliosis
curvature
toothed wheel
rod
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FR2900563B1 (en
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Gerard Bollini
Frederic Fortin
Johann Robin
Brice Sennequier
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    • 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
    • A61B17/7062—Devices acting on, attached to, or simulating the effect of, vertebral processes, vertebral facets or ribs ; Tools for such devices
    • A61B17/707—Devices acting on, or attached to, a transverse process or rib; Tools therefor
    • 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
    • A61B17/7002—Longitudinal elements, e.g. rods
    • A61B17/7014—Longitudinal elements, e.g. rods with means for adjusting the distance between two 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
    • 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
    • A61B17/60—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 for external osteosynthesis, e.g. distractors, contractors
    • A61B17/66—Alignment, compression or distraction mechanisms
    • 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
    • A61B17/80—Cortical plates, i.e. bone plates; Instruments for holding or positioning cortical plates, or for compressing bones attached to cortical plates
    • A61B17/8004—Cortical plates, i.e. bone plates; Instruments for holding or positioning cortical plates, or for compressing bones attached to cortical plates with means for distracting or compressing the bone or bones
    • A61B17/8009—Cortical plates, i.e. bone plates; Instruments for holding or positioning cortical plates, or for compressing bones attached to cortical plates with means for distracting or compressing the bone or bones the plate having a ratchet

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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)
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  • Orthopedics, Nursing, And Contraception (AREA)

Abstract

The device has a central module (20) with a toothed wheel translating rods (12a, 12b) in opposite directions. The rods are guided by traversing recesses. The wheel translates a rod (14) traversing the module (20) guided by a recess and translates transversally with respect to a plane of the rods (12a, 12b) by reducing the height of scoliotic curvature. The module and the rods act in concordance for rectification of the curvature. The wheel`s rotation displaces the rods (12a, 12b, 14) in an identical manner to extend the curvature in a longitudinal direction, and to reduce the curvature.

Description

DISPOSITIF REGLABLE REDRESSEUR DE SCOLIOSEADJUSTABLE SCOLIOSIS RECTIFIER DEVICE

-------------------------------------------------- Domaine de l'invention: La présente invention concerne un dispositif réglable redresseur de scoliose qui distracte les extrémités d'une courbure scoliotique , en même temps qu'il réduit la courbure pathologique. Art Antérieur : Il existe déjà un premier dispositif de distraction (Brevet WO 0/2766) qui permet de corriger les déformations du tronc d'un enfant par mise sous tension répétée à mesure que la croissance de l'enfant augmente. Il permet de corriger par effets successifs sans blocage définitif, la scoliose par la distraction appliquée dés son implantation. Il autorise ensuite des réglages en cours de croissance qui se font par une petite incision pour remettre en tension ce dispositif ( voir figure 1 planche 1/7) Il existe aussi un deuxième dispositif dénommé correcteur scoliotique brevet (PCT/FR/0407138) qui corrige les scolioses ; ce deuxième dispositif diffère du premier par son aspect autocorrectif puisque cette fois ci, il n'est plus nécessaire d'intervenir, car la correction de la courbure s'effectue en une seule fois, et le dispositif s'allonge automatiquement avec la croissance . Il est visualisé sur la figure 2 de la planche 1/7. Le premier dispositif de l'art antérieur corrige les scolioses 25 par mise en tension régulière et progressive des points d'appui du dispositif avec les os . Alors que le deuxième dispositif également de l'art antérieur, corrige les scolioses par réduction de la courbure en guidant la croissance le long du tuteur formé par le dispositif lui-même . 30 2 La liaison transversale avec le sommet de la courbure permet de la réduire efficacement en générant une correction immédiate de ladite courbure , mais en induisant des contraintes élevées aux points d'accrochage du dispositif au sommet de la courbure scoliotique. Le nouveau dispositif combine les fonctionnalités et les avantages des deux dispositifs de l'art antérieur, en ajoutant par la présence de nouveaux moyens des fonctionnalités nouvelles Ce dispositif permet le déplacement simultané ou dissocié des deux tiges à crémaillères longitudinales et d'une tige à crémaillère transversale de manière contrôlée, ces déplacements provoquant une distraction et une réduction progressive de la courbure scoliotique. Les tiges possédant lesdites crémaillères peuvent être bloquées par des moyens identiques à ceux de l'art antérieur. Le dispositif objet de l'invention permet une correction progressive au fur et à mesure des remises en tension du dispositif combinant les moyens de l'art antérieur, ce qui favorise une concordance avec le rythme de croissance de l'enfant et son évolution pathologique, en évitant de provoquer des contraintes élevées à la fois sur le squelette et sur le matériel.  -------------------------------------------------- Field of the Invention: The present invention relates to an adjustable scoliosis straightener device that distracts the ends of a scoliosis curvature, while at the same time reducing pathological curvature. PRIOR ART: There is already a first distraction device (patent WO 0/2766) which makes it possible to correct the deformations of the trunk of a child by repeatedly putting on tension as the growth of the child increases. It corrects by successive effects without permanent blockage, scoliosis by the distraction applied from its implantation. It then allows adjustments during growth that are made by a small incision to restore tension to this device (see Figure 1 plate 1/7) There is also a second device called scoliotic corrector patent (PCT / FR / 0407138) that corrects scoliosis; this second device differs from the first by its autocorrective aspect since this time, it is no longer necessary to intervene, because the correction of the curvature occurs at once, and the device automatically extends with growth. It is visualized in Figure 2 of the plate 1/7. The first device of the prior art corrects scoliosis 25 by putting in regular and progressive tension of the support points of the device with the bones. While the second device also of the prior art, corrects scoliosis by reducing the curvature by guiding the growth along the guardian formed by the device itself. The transverse connection with the apex of the curvature makes it possible to reduce it effectively by generating an immediate correction of said curvature, but by inducing high stresses at the attachment points of the device at the top of the curvature of the scoliosis. The new device combines the functionalities and the advantages of the two devices of the prior art, adding by the presence of new means of new functionalities. This device allows the simultaneous or dissociated movement of the two longitudinal rack rods and a rack-and-pinion rod. transversely in a controlled manner, these displacements causing a distraction and a progressive reduction of the scoliosis curvature. The rods having said racks can be blocked by means identical to those of the prior art. The device which is the subject of the invention makes it possible to progressively correct as the device is brought back into tension by combining the means of the prior art, which favors a concordance with the child's growth rate and its pathological evolution. avoiding high stress on both the skeleton and the material.

Nous verrons que dans cette invention, plusieurs combinaisons de réalisation sont possibles et adaptables à diverses 25 pathologies 30 Les dessins servant à la compréhension de l'invention sont: Dans un Art antérieur récent : Planche 1/7 figure 1 Distracteur costal Planche 1/7 figure 2 Redresseur de scoliose Dans une première variante du dispositif objet de l'invention : Planche 2/7 figure 3 vue en perspective du dispositif objet de l'invention avec son mini outil de réglage ainsi que la visualisation des forces agissantes. Planche 2/7 figure 4 visualisation d'un module d'entraine- ment comportant trois lumières pour laisser coulisser les tiges Planche 3/7 figure 5 vue en perspective agrandie du module d' entraînement Planche 3/7 figure 6 vue en perspective des moyens internes du module entraînant les tiges.  We will see that in this invention, several combinations of embodiments are possible and adaptable to various pathologies. The drawings for understanding the invention are: In a recent prior art: Plate 1/7 Figure 1 Costal Distractor Plate 1/7 Figure 2 Scoliosis Rectifier In a first variant of the device of the invention: Plate 2/7 Figure 3 perspective view of the device object of the invention with its mini adjustment tool and the visualization of the acting forces. Plate 2/7 figure 4 visualization of a training module comprising three lights to let the rods slide board 3/7 figure 5 enlarged perspective view of the drive module Plate 3/7 figure 6 perspective view of the means inside the module driving the rods.

Planche 4/7 figures 7, 8 , vues de dessus et en coupe des déplacements possibles quand la roue dentée engrène avec les trois figes crémaillères. Planche 4/7 figures 9, 10 , vues de dessus et en coupe des déplacements possibles quand la roue dentée n'engrène plus avec 20 la tige à crémaillère transversale . Planche 5/7 figures 11 et 12 , visualisation des déplacements de la scoliose aux extrémités et en son point milieu, le dispositif agissant sur une scoliose à déviation vers la gauche et à déviation vers la droite . 25 Planches 5/7 figures 11d 12d vues de détail au niveau du point milieu. Dans une deuxième variante du dispositif Planche 6/7 figure 13, vue d'un dispositif permettant de découpler le déplacement longitudinal du déplacement transversal 30 Planche 6 /7 figure 14 , vue en perspective d'un autre module d'entraînement des tiges longitudinales et transversale Planche 6 /7 figures 15, vue en perspective des moyens internes du module d'entraînement et des tiges Planche 7 /7 figures 16 et 16d , visualisation de l'action du mini outil sur la première roue dentée Planche 7 /7 figures 17 et 17d visualisation de l'action du 5 mini outil sur la deuxième roue dentée. Dans une première variante , le dispositif redresseur de scoliose 1 comprend : -trois points d'accrochage aux os , dont deux sont situés d'une part aux extrémités de la corde définissant la courbure de la 10 scoliose, et le troisième situé sur le point milieu correspondant au maximum de courbure de la scoliose (figures 11 et 12) -un module central 10 à l'intérieur duquel se trouve au moins une roue dentée 16, qui par rotation fait translater simultanément -au moins deux tiges 12 a et b dans deux directions opposées 15 qui sont guidées en traversant au moins deux autres lumières 101 et 102 - au moins une tige 14 qui translate dans une direction différente des deux premières en étant guidée par la traversée d'au moins une lumière 105 situé dans un plan qui se superpose à celui 20 correspondant aux lumières 101 et 102 La troisième lumière 105 est située dans le plan superposé, On entend par lumière un passage traversant complètement le module 10. Ces lumières 101, 102, 105 sont dimensionnées pour permettre aux tiges 12 a et b de s'engrèner automatiquement avec 25 la roue dentée 16 tout en coulissant et restant guidées dans leur déplacement. Ces lumières permettent également aux tiges 12 a et b et 14 de pouvoir coulisser , même si les tiges sont cintrées dans le plan sagital. Les tiges parallèles 12 a et b se déplacent en sens opposé; la 30 tige 14 dans le sens tranversal , elles possèdent toutes une partie cannelée 124 pour s'engrener dans le module 10 .  Plate 4/7 Figures 7, 8, views from above and in section of the possible displacements when the toothed wheel meshes with the three figs racks. Plate 4/7 FIGS. 9, 10, views from above and in section of possible displacements when the gear wheel no longer meshes with the transverse rack rod. Plate 5/7 Figures 11 and 12, visualization of the scoliosis movements at the ends and at its middle point, the device acting on a scoliosis with deviation to the left and deviation to the right. 25 Plates 5/7 figures 11d 12d detail views at the midpoint. In a second variant of the device Plate 6/7 Figure 13, seen from a device for decoupling the longitudinal displacement of the transverse displacement 30 Plate 6/7 Figure 14, perspective view of another drive module longitudinal rods and transverse board 6/7 FIG. 15, perspective view of the internal means of the drive module and rods Plate 7/7 FIGS. 16 and 16d, visualization of the action of the mini-tool on the first toothed wheel Plate 7/7 FIGS. and 17d viewing the action of the mini tool on the second gear. In a first variant, the scoliosis straightening device 1 comprises: three attachment points to the bones, two of which are located on the one hand at the ends of the rope defining the curvature of the scoliosis, and the third located on the point medium corresponding to the maximum curvature of the scoliosis (FIGS. 11 and 12) -a central module 10 inside which there is at least one toothed wheel 16, which by rotation makes translate simultaneously-at least two rods 12 a and b in two opposite directions 15 which are guided through at least two other lights 101 and 102 - at least one rod 14 which translates in a direction different from the first two being guided by the passage of at least one light 105 located in a plane which is superimposed on the one corresponding to the lights 101 and 102. The third light 105 is located in the superimposed plane. Light is understood to mean a passage completely traversing the module 10. These lights 101, 102, 105 are dimensioned to allow the rods 12a and b to automatically mesh with the toothed wheel 16 while sliding and remaining guided in their movement. These lights also allow the rods 12a and b and 14 to slide, even if the rods are bent in the sagital plane. The parallel rods 12a and b move in opposite directions; the rod 14 in the transverse direction, they all have a fluted portion 124 for meshing in the module 10.

Les déplacements sont obtenus grâce au module d'entraînement 10 équipée d'une roue dentée 16 (figure 6) présentant une empreinte pour être actionnée par un mini outil 30 qui met en rotation ladite roue dentée 16. 5 Quelque soit le sens de la courbure scoliotique , le dispositif peut dans les deux cas ( figures 11, lld 12 12d) à la fois distracter en même temps qu'il réduit la flèche de la courbure gauche ou droite. Des que l'une des trois tiges 12a ou b ou 14 arrive en bout de sa partie cannelée 124, elle se retrouve sur la partie lisse 122 et ne peut plus être entraînée par rotation de la roue dentée 16 qui continue à entraîner les deux autres tiges. La remise en tension du dispositif 1 est toujours possible en desserrant les vis de blocage 15 a, b, ce qui libère les tiges.  The displacements are obtained thanks to the drive module 10 equipped with a toothed wheel 16 (FIG. 6) having an impression to be actuated by a mini-tool 30 which rotates said toothed wheel 16. 5 Whatever the direction of the curvature Scoliotic, the device can in both cases (Figures 11, lld 12d 12d) both distract at the same time that it reduces the arrow of the left or right curvature. As one of the three rods 12a or b or 14 arrives at the end of its grooved portion 124, it is found on the smooth portion 122 and can no longer be driven by rotation of the toothed wheel 16 which continues to drive the other two rods. The re-tensioning of the device 1 is still possible by loosening the locking screws 15 a, b, which releases the rods.

La mise en place du mini outil (ou clef d'entraînement 30) sur la roue dentée 16, permet de translater à nouveau les tiges 12 a, 12b et 14 de manière simultanée ce qui remet en tension le dispositif et réduit progressivement la courbure scoliotique. Une fois cette fonction réalisée , on procédera au reserrage des vis 15 a,b, situées sur le module 10. Dans ce premier mode de réalisation la rotation de la roue dentée provoque un allongement des points extrêmes de fixation de du dispositif 1 deux fois plus importants aux extrémités de la corde que la réduction de la distance de la courbure par rapport à l'axe de distraction passant par les points d'accrochages du dispositif (voir figures 11 11d 12 12d) . En effet, chaque rotation de la roue dentée produit un - déplacement identique pour les trois tiges 12a, 12b et 14, qui se traduit par un déplacement longitudinal de 2x aux extrémités de la courbure scoliotique , et un déplacement x du point milieu de la courbure.  The introduction of the mini tool (or drive key 30) on the toothed wheel 16, allows to translate again the rods 12a, 12b and 14 simultaneously which resets the device and gradually reduces the scoliosis curvature . Once this function has been performed, the screws 15a, b, located on the module 10 will be tightened again. In this first embodiment, the rotation of the toothed wheel causes the end points of attachment of the device 1 to be lengthened twice more. important at the ends of the rope as the reduction of the distance of the curvature with respect to the distraction axis passing through the points of attachment of the device (see Figures 11 11d 12d 12d). Indeed, each rotation of the toothed wheel produces an identical displacement for the three rods 12a, 12b and 14, which results in a longitudinal displacement of 2x at the ends of the scoliotic curvature, and a displacement x of the midpoint of the curvature .

C'est pourquoi quand on fait tourner la roue dentée 16 avec le mini outil 30 le déplacement longitudinal (2x) est deux fois plus important que le déplacement transversal (x) y Dans une deuxième variante , le dispositif réglable 5 redresseur de scoliose 2 comprend: -trois points d'accrochage aux os comme dans la première variante. -un module 20 permettant de faire translater au moins trois tiges 12 a 12b et 14 ; le déplacement de la tige 14 étant dans cette 10 version ,contrairement à la première, indépendant du mouvement des tiges 12a et b -un carter 21 enfermant le module 20 qui comprend lui même deux parties inférieures 22 et supérieure 23. Ce carter comprend également les moyens suivants : 15 -trois lumières traversantes 101, 102, 105 identiques à celles de la première version, qui permettent le guidage des tiges 12 a et b et de la tige 14 placée transversalement -au moins une première roue dentée 26 qui entraîne les tiges 12 a et b dans des directions opposées. 20 -au moins une deuxième roue dentée 25 qui entraîne la tige 14 dans un plan superposé à celui des tiges 12a et b, sachant que la tige 14 se déplace dans une direction oblique et de préférence perpendiculaire aux directions des tiges 12a et b. -des vis 27a et b , 28a et b bloquant les tiges dans la position 25 désirée., Du fait de la présence des deux roues dentées 25 et 26 qui se situent dans des plans différents , le mouvement des tiges 12a et b est indépendant du mouvement de la tige 14. Les têtes de vis de blocage sont facilement accessibles sur le 30 carter 21. 7 Au serrage des vis 27 a et b, on immobilise les tiges 12a et b Au serrage des vis 28 a et b , on immobilise la tige 14 . Il est possible grâce à ce dispositif 2 de réduire la scoliose en jouant sur les réglages de manière séparée .  That is why when rotating the toothed wheel 16 with the mini tool 30 the longitudinal displacement (2x) is twice as large as the transverse displacement (x). In a second variant, the adjustable scoliosis straightener device 2 comprises : -Three points of attachment to the bones as in the first variant. a module 20 making it possible to translate at least three rods 12 to 12b and 14; the displacement of the rod 14 being in this version, unlike the first, independent of the movement of the rods 12a and b -a housing 21 enclosing the module 20 which itself comprises two lower parts 22 and upper 23. This housing also includes the the following means: three through-lights 101, 102, 105 identical to those of the first version, which allow the guide rods 12a and b and the rod 14 placed transversely at least one first gear 26 which drives the rods; 12 a and b in opposite directions. At least one second gear 25 which drives the rod 14 in a plane superimposed on that of the rods 12a and b, knowing that the rod 14 moves in an oblique direction and preferably perpendicular to the directions of the rods 12a and b. screws 27a and b, 28a and b blocking the rods in the desired position. Due to the presence of the two gears 25 and 26 which are in different planes, the movement of the rods 12a and b is independent of the movement of the rod 14. The locking screw heads are easily accessible on the housing 21. 7 When tightening the screws 27a and b, the rods 12a and b are immobilized. When the screws 28a and b are tightened, the stem 14. It is possible thanks to this device 2 to reduce scoliosis by playing on the settings separately.

On peut donc : soit régler à une valeur donnée l'allongement dans le sens longitudinal de la scoliose soit réduire la courbure en réglant la flèche de la courbure scoliotique à une valeur prédéterminée .  It is therefore possible either to adjust at a given value the elongation in the longitudinal direction of the scoliosis or to reduce the curvature by adjusting the sag of the scoliosis curvature to a predetermined value.

On peut donc régler de manière indépendante l'allongement et la réduction de la courbure scoliotique; ce qui permet à l'opérateur d'adapter l'élongation et la réduction de courbure en fonction de la résistance mécanique à l'entrainement qu'il rencontre sur chaque axe de rotation d'une roue dentée 26 ou 25 .  The lengthening and reduction of the scoliotic curvature can therefore be regulated independently; This allows the operator to adapt the elongation and curvature reduction as a function of the mechanical resistance to the drive he encounters on each axis of rotation of a toothed wheel 26 or 25.

Le dispositif 2 offre non seulement une grande souplesse d'utilisation, mais également une possibilité d'adaptation à chaque pathologie spécifique rencontrée.  The device 2 offers not only a great flexibility of use, but also a possibility of adaptation to each specific pathology encountered.

25 3025 30

Claims (5)

REVENDICATIONS 1-Dispositif réglable redresseur de scoliose (1) ou (2) accroché aux os en trois points dont deux sont situés aux extrémités de la corde définissant la courbure de la scoliose et le troisième sur le point milieu correspondant au maximum de courbure de la scoliose, le dispositif comportant deux tiges (12a eE b) qui translatent longitudinalement en écartant les points d'accrochage situés aux extrémités de la courbure scoliotique caractérisé en ce qu'il comporte en plus : -un module central (10) ou (20) à l'intérieur duquel se trouve au moins une roue dentée (16, 25 et 26) qui, par rotation fait translater : -au moins les deux tiges (12a,12b) dans deux directions 15 opposées qui sont guidées en traversant au moins deux lumières (101,102) -au moins une tige (14) qui traverse le module (10) ou (20) guidée par une autre lumière (105), qui translate transversalement , vis à vis du plan des tiges (12a et b) en diminuant la flèche de la 20 scoliose , l'ensemble de ces moyens combinés agissant en concordance sur le redressement de la courbure scoliotique.  1-Adjustable scoliosis straightener device (1) or (2) attached to the bones in three points, two of which are located at the ends of the rope defining the curvature of the scoliosis and the third on the midpoint corresponding to the maximum curvature of the scoliosis , the device comprising two rods (12a eE b) which translate longitudinally by spacing the attachment points located at the ends of the scoliotic curvature characterized in that it further comprises: a central module (10) or (20) to within which there is at least one toothed wheel (16, 25 and 26) rotatably translating: at least the two rods (12a, 12b) in two opposite directions which are guided through at least two lumens (101,102) -at least one rod (14) which passes through the module (10) or (20) guided by another light (105), which translates transversely, with respect to the plane of the rods (12a and b) by decreasing the 20 scoliosis arrow, all of these combined sets acting in concordance on the recovery of scoliosis curvature. 2- Dispositif réglable redresseur de scoliose (1) selon la revendication 1 caractérisé en ce que la roue dentée (16) est 25 commune aux tiges (12a et 12b) d'une part et (14) d'autre part , de sorte que chaque rotation de la roue dentée (16) translate simultanément les trois tiges (12a,12b, 14) d'un déplacement identique, ce qui provoque l'allongement de la courbure scoliotique d'une valeur (2x) dans le sens longitudinal, et d'une valeur (x) dans 30 le sens de la réduction de la flèche scoliotique.  2- Adjustable scoliosis straightener device (1) according to claim 1 characterized in that the toothed wheel (16) is common to the rods (12a and 12b) on the one hand and (14) on the other hand, so that each rotation of the toothed wheel (16) simultaneously translates the three rods (12a, 12b, 14) by an identical displacement, which causes the lengthening of the scoliotic curvature by a value (2x) in the longitudinal direction, and a value (x) in the direction of reducing the scoliotic deflection. 3-Dispositif réglable redresseur de scoliose (1) ou (2) selon la revendication 1 caractérisé en ce que le module central (10,20) comprend des lumières (101), (102), et (105) placées dans des plans différents qui permettent la translation des tiges (12 a et b) et (14) avec un très bon guidage, même si lesdites tiges sont cintrées  3-scoliosis straightening adjustable device (1) or (2) according to claim 1 characterized in that the central module (10,20) comprises lights (101), (102), and (105) placed in different planes which allow the translation of the rods (12 a and b) and (14) with a very good guide, even if said rods are bent 4-Dispositif réglable redresseur de scoliose (1) ou (2) selon la revendication 1 caractérisé en ce que les tiges parallèles (12 a et b) et la tige (14) possèdent une partie cannelée (124) pour s'engrener dans la roue dentée (16, 25, 26) , la mise en rotation de ladite roue dentée se faisant par un mini-outil (30), et le blocage des trois tiges (12a et b) et (14) s'effectuant par serrage de vis (15a,15b, 27a,27b, 28a, 28b) , le déplacement puis le blocage des trois tiges étant simultané.  4-adjustable scoliosis straightener device (1) or (2) according to claim 1 characterized in that the parallel rods (12a and b) and the rod (14) have a fluted portion (124) for meshing into the toothed wheel (16, 25, 26), the rotation of said toothed wheel is by a mini-tool (30), and the locking of the three rods (12a and b) and (14) is effected by clamping of screw (15a, 15b, 27a, 27b, 28a, 28b), the displacement and the blocking of the three rods being simultaneous. 5-Dispositif réglable redresseur de scoliose (2) selon la revendication 1 caractérisé en ce que le module (20) comprend: -un carter ( 21) formé de deux parties fixées entre elles (22) et (23) à l'intérieur duquel on trouve les moyens suivants : -trois lumières (101, 102 , 105) qui guident les tiges (12 a 20 et b) et tige (14), -au moins une première roue dentée (26) qui entraîne longitudinalement les tiges (12 a et b) dans des directions opposées, -au moins une deuxième roue dentée (25 ) qui entraîne la tige 25 (14) dans une direction transversale, la combinaison de ces moyens permettant de faire translater de manière indépendante la tige (14) vis à vis des tiges (12a et b) et inversement, -des moyens de blocage des tiges dans une position choisie 30 par l'opérateur qui sont des vis (27a et b) et (28a et b) facilement accessibles sur le carter (21).  5-adjustable scoliosis straightener device (2) according to claim 1 characterized in that the module (20) comprises: a housing (21) formed of two parts fixed together (22) and (23) inside which the following means are found: three lights (101, 102, 105) which guide the rods (12 to 20 and b) and rod (14), at least one first gear (26) which longitudinally drives the rods (12). a and b) in opposite directions, at least one second gear (25) which drives the rod (14) in a transverse direction, the combination of these means for independently translating the rod (14) with respect to the rods (12a and b) and vice versa, means for locking the rods in a position chosen by the operator which are screws (27a and b) and (28a and b) which are easily accessible on the housing (21 ).
FR0604044A 2006-05-05 2006-05-05 ADJUSTABLE SCOLIOSIS RECTIFIER DEVICE Expired - Fee Related FR2900563B1 (en)

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