FR2921247A1 - Osteosynthesis or arthrodesis device for e.g. blocking leg joint, has rod with rectangular dissymmetric transversal section for obtaining rigidity in one direction and flexibility in another direction for following internal cortex - Google Patents
Osteosynthesis or arthrodesis device for e.g. blocking leg joint, has rod with rectangular dissymmetric transversal section for obtaining rigidity in one direction and flexibility in another direction for following internal cortex Download PDFInfo
- Publication number
- FR2921247A1 FR2921247A1 FR0757838A FR0757838A FR2921247A1 FR 2921247 A1 FR2921247 A1 FR 2921247A1 FR 0757838 A FR0757838 A FR 0757838A FR 0757838 A FR0757838 A FR 0757838A FR 2921247 A1 FR2921247 A1 FR 2921247A1
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- FR
- France
- Prior art keywords
- rod
- cortex
- guard
- flexibility
- osteosynthesis
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Classifications
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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
-
- 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
- A61B17/72—Intramedullary pins, nails or other devices
- A61B17/7208—Flexible pins, e.g. ENDER pins
-
- 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
- A61B17/72—Intramedullary pins, nails or other devices
- A61B17/7216—Intramedullary pins, nails or other devices for bone lengthening or compression
- A61B17/7225—Intramedullary pins, nails or other devices for bone lengthening or compression for bone compression
-
- 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
- A61B17/72—Intramedullary pins, nails or other devices
- A61B17/7291—Intramedullary pins, nails or other devices for small bones, e.g. in the foot, ankle, hand or wrist
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- Health & Medical Sciences (AREA)
- Orthopedic Medicine & Surgery (AREA)
- Surgery (AREA)
- Life Sciences & Earth Sciences (AREA)
- Heart & Thoracic Surgery (AREA)
- Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
- Engineering & Computer Science (AREA)
- Biomedical Technology (AREA)
- Neurology (AREA)
- Medical Informatics (AREA)
- Molecular Biology (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Surgical Instruments (AREA)
Abstract
Description
L'invention se rattache au secteur technique de l'orthopédie et concerne plus particulièrement un dispositif d'ostéosynthèse ou d'arthrodèse. The invention relates to the technical field of orthopedics and more particularly relates to an osteosynthesis device or arthrodesis.
Il est parfaitement connu pour un homme du métier d'utiliser pour réaliser des ostéosynthèses en vue de réduire une fracture osseuse ou pour réaliser des arthrodèses en vue de bloquer définitivement une articulation ; d'utiliser des vis, des plaques, des agrafes, des broches en forme de tige ou autre combinaison quelconque de ces différents moyens. C'est ainsi que l'on peut citer par exemple les broches dites de KIRCHNER qui sont d'une utilisation aisée et d'un coût réduit. Toutefois, ces broches n'ont pas une grande stabilité avec des problèmes de migration et de rotation. Des risques d'infection peuvent également apparaître, lorsque ces broches sont débouchantes. It is well known to a person skilled in the art to use osteosynthesis to reduce a bone fracture or to perform arthrodeses to permanently block a joint; to use screws, plates, staples, rod-shaped pins or any other combination of these various means. Thus we can cite for example the so-called KIRCHNER pins which are easy to use and low cost. However, these pins do not have a high stability with migration and rotation problems. Risks of infection may also occur when these pins are open.
L'invention s'est fixée pour but de remédier à ces inconvénients d'une manière simple, sure, efficace et rationnelle, en proposant un dispositif d'ostéosynthèse ou d'arthrodèse qui comprend au moins une broche destinée à être impactée dans des fragments osseux ou dans des parties d'os, d'une articulation à bloquer. The aim of the invention is to remedy these drawbacks in a simple, safe, effective and rational manner by proposing an osteosynthesis or arthrodesis device which comprises at least one pin intended to be impacted in fragments. bone or in parts of bone, of a joint to be blocked.
Un problème que se propose de résoudre l'invention, est de permettre à la broche, lors de son introduction, de suivre le cortex interne après avoir traversé la première corticale externe. Afin de résoudre ce problème, la broche présente une section transversale déterminée afin d'obtenir une rigidité dans un sens et une flexibilité dans un autre sens considérée perpendiculairement au précédent pour suivre la corticale interne. A problem that the invention proposes to solve is to allow the pin, during its introduction, to follow the inner cortex after having passed through the first external cortex. In order to solve this problem, the spindle has a determined cross-section in order to obtain rigidity in one direction and flexibility in another direction considered perpendicular to the preceding direction to follow the internal cortex.
Avantageusement, la section transversale est disymétrique du type rectangulaire. La broche est constituée par une tige sensiblement rectiligne. Des aspérités d'ancrage et de retenue sont formées sur au moins l'un des côtés de plus faible épaisseur de la tige, de sorte que les aspérités ne touchent pas la corticale interne au fur et à mesure de son introduction. Advantageously, the cross section is asymmetrical of the rectangular type. The spindle is constituted by a substantially rectilinear rod. Anchoring and retaining asperities are formed on at least one of the thinner sides of the rod, so that the asperities do not touch the internal cortex as it is introduced.
Un autre problème que se propose de résoudre l'invention est d'éviter tout phénomène de migration de la ou des broches. Another problem to be solved by the invention is to avoid any phenomenon of migration of the pin or pins.
Dans ce but, l'une des extrémités au moins de la broche, présente un agencement faisant office de butée en appui sur une partie de la corticale externe du ou des fragments osseux ou parties d'os. For this purpose, at least one of the ends of the spindle has an arrangement acting as a stop bearing on a portion of the outer cortex of the bone fragment (s) or parts thereof.
Selon une forme de réalisation, l'agencement faisant office de butée est constitué par une garde conformée pour éviter tout enfoncement de la broche. La garde est réalisée dans un matériau malléable ou orientable pour s'ajuster à la corticale externe. According to one embodiment, the arrangement acting as a stop is constituted by a shaped guard to prevent any depression of the spindle. The guard is made of a malleable material or adjustable to adjust to the external cortex.
Un autre problème que se propose de résoudre l'invention est d'éviter de traverser la corticale opposée à celle à partir de laquelle est introduite la broche et d'éviter l'agression des tissus. Dans ce but, l'extrémité de la tige considérée à l'opposé de la garde, est arrondie. Another problem to be solved by the invention is to avoid crossing the cortex opposite to that from which the pin is introduced and to avoid the aggression of tissues. For this purpose, the end of the rod considered opposite to the guard, is rounded.
Selon une autre caractéristique, la tige est réalisée dans un matériau biocompatible alliant rigidité primaire élevée et ductibilité plastique importante, par exemple du titane. According to another characteristic, the rod is made of a biocompatible material combining high primary stiffness and high plastic ductility, for example titanium.
L'invention est exposée ci-après plus en détail à l'aide des figures des dessins annexés dans lesquels : - la figure 1 est une vue en perspective d'un exemple de réalisation d'une broche selon l'invention. - la figure 2 montre un exemple d'utilisation d'une broche selon l'invention dans le cas d'un premier métatarse et de la première phalange, la broche étant illustrée avant matage de la garde. - la figure 3 est une vue de dessus correspondant à la figure 2. - la figure 4 montre l'utilisation du dispositif avec deux broches toujours dans le cas du premier métatarse et d'une première phalange, et avant matage de la garde. - la figure 5 est une vue de dessus correspondant à la figure 3. Comme indiqué, l'invention trouve une application avantageuse pour réaliser des ostéosynthèses ou des arthrodèses pour différents os ou articulations. Avantageusement le dispositif peut être appliqué dans le cas de petits fragments osseux ou petites articulations telles que le pied ou la main. Le dispositif comprend au moins une broche sous forme d'une tige (1) sensiblement rectiligne. The invention is described below in more detail with the help of the figures of the accompanying drawings in which: - Figure 1 is a perspective view of an embodiment of a pin according to the invention. - Figure 2 shows an example of use of a pin according to the invention in the case of a first metatarsal and the first phalanx, the pin being illustrated before matting of the guard. - Figure 3 is a top view corresponding to Figure 2. - Figure 4 shows the use of the device with two pins always in the case of the first metatarsal and a first phalanx, and before matage of the guard. - Figure 5 is a top view corresponding to Figure 3. As indicated, the invention finds an advantageous application for performing osteosynthesis or arthrodesis for different bones or joints. Advantageously, the device can be applied in the case of small bone fragments or small joints such as the foot or the hand. The device comprises at least one pin in the form of a rod (1) substantially rectilinear.
L'une des extrémités de la tige (1) présente une garde anti-25 enfoncement (la) faisant office de butée en appui sur une partie de la corticale externe du ou des fragments osseux ou parties d'os considérées.20 Avantageusement, la garde (la) est réalisée dans un matériau malléable ou orientable pour s'ajuster à la corticale externe. One of the ends of the rod (1) has an anti-recess guard (1a) acting as a stop resting on a part of the external cortex of the bone fragment (s) or parts of bone considered. Advantageously, the guard (la) is made of a malleable material or adjustable to fit the outer cortex.
L'extrémité (lb) de la tige, considérée à l'opposée de la garde (la), est arrondie afin d'éviter de traverser la corticale, ou opposée à l'introduction ladite tige et d'éviter toute agression des tissus environnants. The end (Ib) of the stem, seen at the opposite of the guard (la), is rounded in order to avoid crossing the cortex, or opposed to the introduction of said stem and to avoid any aggression of the surrounding tissues .
Selon une autre caractéristique, la tige (1) présente une section transversale disymétrique du type rectangulaire afin d'obtenir une rigidité dans un sens et une flexibilité dans un autre sens, considéré perpendiculairement au précédent pour suivre la corticale interne. D'autres formes géométriques peuvent être prévues. Dans le cas d'une section transversale rectangulaire, la flexibilité est obtenue à partir du côté de la tige de plus faible épaisseur. According to another feature, the rod (1) has a rectangular-type asymmetrical cross section in order to obtain a rigidity in one direction and a flexibility in another direction, considered perpendicular to the previous one to follow the internal cortex. Other geometric shapes may be provided. In the case of a rectangular cross section, the flexibility is obtained from the side of the rod of smaller thickness.
Des aspérités d'ancrage et de retenue (lc) peuvent être formées sur au moins l'un des côtés de plus faible épaisseur de la tige (1), de sorte que ces aspérités ne sont pas en contact avec la corticale interne, étant donné que sous l'effet de la flexion de la tige, c'est le grand côté qui peut être en contact. Anchor and retention asperities (1c) can be formed on at least one of the thinner sides of the rod (1), so that these asperities are not in contact with the internal cortex, given that that under the effect of the bending of the rod, it is the long side that can be in contact.
On renvoie aux figures 3 et 4, qui montrent un exemple d'utilisation du dispositif dans le cadre d'une arthrodèse du gros orteil au moyen de deux tiges (1). Après forage d'un avant trou, l'opérateur introduit une première tige (1) dans l'axe du pied d'une manière inclinée par rapport à cet axe en positionnant le côté le plus résistant dans un plan vertical. Après introduction partielle, la tige bute sur la corticale interne et grâce à son extrémité arrondie (lb) et sa flexibilité, épouse le profil de cette corticale, sans pour autant la traverser. Referring to Figures 3 and 4, which show an example of use of the device in the context of an arthrodesis of the big toe by means of two rods (1). After drilling a pre-hole, the operator introduces a first rod (1) in the axis of the foot in an inclined manner with respect to this axis by positioning the strongest side in a vertical plane. After partial introduction, the stem abuts on the internal cortex and thanks to its rounded end (lb) and its flexibility, marries the profile of this cortex, without crossing it.
L'opérateur poursuit l'introduction, éventuellement en impactant la tige au moyen d'un marteau jusqu'à ce que la garde (la) soit au contact de la corticale externe. The operator continues the introduction, possibly by impacting the rod with a hammer until the guard (la) is in contact with the outer cortex.
Puis comme indiqué précédemment, il suffit de mater cette garde (la) sur cette corticale externe. L'opération peut ensuite positionner une deuxième tige inversée pour assurer une bonne stabilité notamment en empêchant toute rotation. Then, as indicated previously, it is enough to watch this guard (la) on this external cortex. The operation can then position a second inverted rod to ensure good stability including preventing rotation.
La garde (la) et les crans (lc) assurent un bon maintien en compression. The guard (la) and the notches (lc) ensure a good maintenance in compression.
A noter que la section de la tige (1) est déterminée pour permettre une flexibilité dans un sens selon un angle d'environ 30. Note that the section of the rod (1) is determined to allow flexibility in one direction at an angle of about 30.
Les avantages ressortent bien de la description. En particulier, on souligne : - stabilité primaire très grande au moment de la pose et stabilité secondaire, car pas de migration grâce à la butée et les crans. - facilité de pose, il suffit de taper sur la butée - fiabilité, pas de risque de percer la corticale opposée à celle de l'introduction. -technique opératoire de faible coût et rapide.25 The advantages are apparent from the description. In particular, it highlights: - very high primary stability at the time of installation and secondary stability, because no migration through the stop and notches. - ease of installation, just tap on the stop - reliability, no risk of piercing cortical opposite to that of the introduction. -operative technique of low cost and fast.
Claims (1)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR0757838A FR2921247B1 (en) | 2007-09-25 | 2007-09-25 | OSTEOSYNTHESIS OR ARTHRODESIS DEVICE |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR0757838A FR2921247B1 (en) | 2007-09-25 | 2007-09-25 | OSTEOSYNTHESIS OR ARTHRODESIS DEVICE |
Publications (2)
Publication Number | Publication Date |
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FR2921247A1 true FR2921247A1 (en) | 2009-03-27 |
FR2921247B1 FR2921247B1 (en) | 2010-10-22 |
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Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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FR0757838A Expired - Fee Related FR2921247B1 (en) | 2007-09-25 | 2007-09-25 | OSTEOSYNTHESIS OR ARTHRODESIS DEVICE |
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FR (1) | FR2921247B1 (en) |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH03168145A (en) * | 1989-11-28 | 1991-07-19 | Kyocera Corp | Rib connecting member |
FR2758075A1 (en) * | 1997-01-08 | 1998-07-10 | Brahim Khenifar | Surgical pin for treatment of long bone fractures |
WO2006107264A1 (en) * | 2005-04-08 | 2006-10-12 | Eulogic Ab | Surgical fixation pin |
WO2006124764A1 (en) * | 2005-05-18 | 2006-11-23 | Sonoma Orthopedic Products, Inc. | Minimally invasive actuable bone fixation devices, systems and methods of use |
EP1749490A1 (en) * | 2005-08-05 | 2007-02-07 | BIEDERMANN MOTECH GmbH | Bone anchoring element |
-
2007
- 2007-09-25 FR FR0757838A patent/FR2921247B1/en not_active Expired - Fee Related
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH03168145A (en) * | 1989-11-28 | 1991-07-19 | Kyocera Corp | Rib connecting member |
FR2758075A1 (en) * | 1997-01-08 | 1998-07-10 | Brahim Khenifar | Surgical pin for treatment of long bone fractures |
WO2006107264A1 (en) * | 2005-04-08 | 2006-10-12 | Eulogic Ab | Surgical fixation pin |
WO2006124764A1 (en) * | 2005-05-18 | 2006-11-23 | Sonoma Orthopedic Products, Inc. | Minimally invasive actuable bone fixation devices, systems and methods of use |
EP1749490A1 (en) * | 2005-08-05 | 2007-02-07 | BIEDERMANN MOTECH GmbH | Bone anchoring element |
Also Published As
Publication number | Publication date |
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FR2921247B1 (en) | 2010-10-22 |
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