DESCRIPTION. DESCRIPTION.
La présente invention a pour objet un fixateur interne de rachis rigide et amorti, utilisée pour la chirurgie de la colonne vertébrale. The present invention relates to an internal rigid and cushioned spine fixer, used for spinal surgery.
La présence de contraintes vibratoires transmisent à l'interface vis os, dues au contact métal sur métal pose des problémes de douleur aux patients, avec ostéolyse et rupture de materiel. Il est nécessaire de pallier aux problèmes de contact métallique. The presence of vibrational stresses transmitted to the bone-to-bone interface, due to metal-to-metal contact, poses pain problems for patients, with osteolysis and rupture of material. It is necessary to overcome the problems of metallic contact.
Conformément à l'invention, et selon une première caractéristique ce résultat est obtenu par un jeu de bagues en polymère, de préférence du polyéthylène, sertie dans une pince de fixation à base de métal, de préférence du titane. According to the invention, and according to a first characteristic, this result is obtained by a set of polymer rings, preferably polyethylene, crimped in a fixing clip based on metal, preferably titanium.
Ces bagues permettent la disparition des contraintes vibratoires transmisent à l'interface vis pédiculaire os, par amortissement, associé à un micro débattement entre la tête de vis et les bagues en polymère.These rings allow the disappearance of the vibrational stresses transmitted to the pedicle screw bone interface, by damping, associated with a micro clearance between the screw head and the polymer rings.
La deuxième caractéristique de l'invention, repose sur le fluage des bagues de polymère lors du serrage de l'écrou sur la vis. Rendant ainsi totalement solidaire l'ensemble vis pédiculaire, pince de fixation, bague de polymère et écrou. The second characteristic of the invention is based on the creep of the polymer rings when the nut is tightened on the screw. Thus making the pedicle screw, fixing clamp, polymer ring and nut completely integral.
La troisième caractéristique de l'invention, concerne l'extrémité supérieur des vis pédiculaires. Cette extrémité a la caractéristique d'être arrondi afin d'éviter toutes blessures du tissus musculaire. The third characteristic of the invention relates to the upper end of the pedicle screws. This end has the characteristic of being rounded in order to avoid any injury to the muscle tissue.
Les dessins annexés illustrent l'invention
La figure 1 représente l'écrou, qui permettra une fois bloqué le fluage du polymère.The accompanying drawings illustrate the invention
Figure 1 shows the nut, which will once block the flow of the polymer.
La figure 2 représente les rondelles en polymère.Figure 2 shows the polymer washers.
La figure 3 représente la pince de fixation, avec son alésage destiné à recevoir les barres de liaisons
La figure 4 représente la vis pédiculaire tronconique revêtue de titane porreux, avec son extrémité supérieur arrondi, afin d'éviter les blessures du tissus musculaire.Figure 3 shows the clamp, with its bore for receiving the connecting bars
FIG. 4 represents the frustoconical pedicle screw coated with porous titanium, with its rounded upper end, in order to avoid injuries to the muscle tissue.
La figure 5 représente l'ensemble du système en coupe dans sa position assemblé.Figure 5 shows the entire system in section in its assembled position.
On peut nettement s'apercevoir qu'il n'y a aucun contact métallique.We can clearly see that there is no metallic contact.
A titre d'exemple non limitatif, la pince de liaison aura les dimensions de l'ordre de 20 mm pour la longueur, 12 mm pour la largeur et 12 mm pour la hauteur. By way of nonlimiting example, the connecting clamp will have the dimensions of the order of 20 mm for the length, 12 mm for the width and 12 mm for the height.
Le dispositif selon l'invention est particulièrement destiné à la chirurgie du rachis dégénératif, tumorale et traumatologique. The device according to the invention is particularly intended for surgery of the degenerative, tumor and trauma spine.
Enfin, ce matériel ne nécessite pas une instrumentation particulière pour sa pose. Finally, this material does not require any particular instrumentation for its installation.
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR9507043AFR2735011A1 (en) | 1995-06-12 | 1995-06-12 | Surgical bone fixator |
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR9507043AFR2735011A1 (en) | 1995-06-12 | 1995-06-12 | Surgical bone fixator |
| Publication Number | Publication Date |
|---|---|
| FR2735011A1true FR2735011A1 (en) | 1996-12-13 |
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| FR9507043AWithdrawnFR2735011A1 (en) | 1995-06-12 | 1995-06-12 | Surgical bone fixator |
| Country | Link |
|---|---|
| FR (1) | FR2735011A1 (en) |
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| RU2440795C2 (en)* | 2009-02-19 | 2012-01-27 | Ульрих Гмбх Унд Ко. Кг | Device for vertebral column stabilisation |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US6355038B1 (en) | 1998-09-25 | 2002-03-12 | Perumala Corporation | Multi-axis internal spinal fixation |
| US6669697B1 (en) | 1998-09-25 | 2003-12-30 | Perumala Corporation | Self-retaining bolt for internal spinal stabilizers |
| WO2000018312A1 (en)* | 1998-09-25 | 2000-04-06 | Perumala Corporation | Multi-axis connections between spinal stabilizers and screws |
| US7507248B2 (en) | 2001-04-06 | 2009-03-24 | Ldr Medical | Spinal osteosynthesis device and preparation method |
| US8221457B2 (en) | 2001-10-18 | 2012-07-17 | Ldr Medical | Progressive approach osteosynthesis device and preassembly method |
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| FR2865375A1 (en)* | 2004-01-27 | 2005-07-29 | Medicrea International | Vertebral osteosynthesis material for scoliosis treatment, has connection rods connected to pedicle screws, where one screw is of polyaxial type and has flexible extended unit connecting threaded pin and base piece fixed to vertebrate |
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| ES2275382A1 (en)* | 2005-01-03 | 2007-06-01 | Socinser 21, S.A. | Vertebral transpedicular fixation system for vertebral fusion for treatment of spinal disorders of traumatic or degenerative origin has blockage for longitudinal bars obtained in any direction at head of thymes |
| US10751187B2 (en) | 2007-06-08 | 2020-08-25 | Ldr Medical | Intersomatic cage, intervertebral prosthesis, anchoring device and implantation instruments |
| RU2440795C2 (en)* | 2009-02-19 | 2012-01-27 | Ульрих Гмбх Унд Ко. Кг | Device for vertebral column stabilisation |
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| Date | Code | Title | Description |
|---|---|---|---|
| ST | Notification of lapse |