FR2846870A1 - Osteosynthesis equipment for treatment of long ulna comprises plate drilled with holes for fixing by screws to bone parts, plate integral with leg, inserted in distal bone part, having end profile favoring bone penetration - Google Patents
Osteosynthesis equipment for treatment of long ulna comprises plate drilled with holes for fixing by screws to bone parts, plate integral with leg, inserted in distal bone part, having end profile favoring bone penetration Download PDFInfo
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- FR2846870A1 FR2846870A1 FR0213956A FR0213956A FR2846870A1 FR 2846870 A1 FR2846870 A1 FR 2846870A1 FR 0213956 A FR0213956 A FR 0213956A FR 0213956 A FR0213956 A FR 0213956A FR 2846870 A1 FR2846870 A1 FR 2846870A1
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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
- A61B17/80—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
- A61B17/8014—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 extension or compression force being caused by interaction of the plate hole and the screws
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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
- A61B17/80—Cortical plates, i.e. bone plates; Instruments for holding or positioning cortical plates, or for compressing bones attached to cortical plates
- A61B17/809—Cortical plates, i.e. bone plates; Instruments for holding or positioning cortical plates, or for compressing bones attached to cortical plates with bone-penetrating elements, e.g. blades or prongs
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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
- A61B17/80—Cortical plates, i.e. bone plates; Instruments for holding or positioning cortical plates, or for compressing bones attached to cortical plates
- A61B17/8052—Cortical plates, i.e. bone plates; Instruments for holding or positioning cortical plates, or for compressing bones attached to cortical plates immobilised relative to screws by interlocking form of the heads and plate holes, e.g. conical or threaded
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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
- A61B17/80—Cortical plates, i.e. bone plates; Instruments for holding or positioning cortical plates, or for compressing bones attached to cortical plates
- A61B17/8061—Cortical plates, i.e. bone plates; Instruments for holding or positioning cortical plates, or for compressing bones attached to cortical plates specially adapted for particular bones
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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
- A61B17/80—Cortical plates, i.e. bone plates; Instruments for holding or positioning cortical plates, or for compressing bones attached to cortical plates
- A61B17/8095—Wedge osteotomy devices
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Abstract
Description
MATERIEL D'OSTEOSYNTHESE POUR LEOSTEOSYNTHESIS MATERIAL FOR THE
TRAITEMENT D'UN CUBITUS "LONG"TREATMENT OF A "LONG" CUBITUS
La présente invention est relative à un matériel d'ostéosynthèse pour le traitement The present invention relates to osteosynthesis equipment for the treatment
d'un cubitus "long".of a "long" ulna.
Chez certains sujets, le cubitus présente une longueur excessive par rapport au 10 radius, telle que la tête cubitale vient interférer avec les tissus environnants ou les os du carpe, causant diverses pathologies. Cette longueur excessive peut résulter de malformations congénitales, d'une augmentation de la longueur du cubitus suite à la réparation d'une fracture, ou de la vieillesse, le cubitus ayant, au cours du temps, tendance à "descendre" par rapport au radius lors des efforts. 15 In some subjects, the ulna has an excessive length with respect to the radius, such that the ulnar head interferes with the surrounding tissues or the carpal bones, causing various pathologies. This excessive length can result from congenital malformations, an increase in the length of the ulna following the repair of a fracture, or old age, the ulna having, over time, a tendency to "descend" relative to the radius during efforts. 15
Pour traiter cette longueur excessive, une technique existante consiste à raccourcir le cubitus par ostéotomie, ce qui permet de conserver l'articulation radio-cubitale. La consolidation des deux parties d'os à réunir est classiquement réalisée au moyen d'une plaque d'ostéosynthèse à six trous et six vis (deux 20 groupes de trois trous et vis de part et d'autre de la zone centrale la plaque). To treat this excessive length, an existing technique consists in shortening the ulna by osteotomy, which makes it possible to preserve the radio-ulnar joint. The consolidation of the two parts of bone to be joined is conventionally carried out by means of a six-hole osteosynthesis plate and six screws (two groups of three holes and screws on either side of the central zone the plate) .
Ce type de plaque d'ostéosynthèse a pour inconvénient de nécessiter la réalisation d'une coupe osseuse en retrait de la tête cubitale, en pleine diaphyse, ce qui n'est pas favorable au soudage solide des deux parties d'os à réunir, 25 compte tenu du faible diamètre de la diaphyse cubitale et donc de la faible surface This type of osteosynthesis plate has the drawback of requiring a bone cut to be set back from the ulnar head, in full diaphysis, which is not favorable for solid welding of the two parts of bone to be joined, 25 taking into account the small diameter of the ulnar diaphysis and therefore the small surface
de contact des parties d'os entre elles. of contact between the bone parts.
De plus, l'obtention d'une parfaite coaptation des parties d'os n'est pas toujours très aisée à obtenir, d'autant plus que les plaques existantes sont relativement 30 épaisses et rigides, et donc non parfaitement adaptées à la forme évasée, In addition, obtaining perfect coaptation of the bone parts is not always very easy to obtain, especially since the existing plates are relatively thick and rigid, and therefore not perfectly suited to the flared shape. ,
légèrement conique, de l'extrémité distale du cubitus. slightly conical, from the distal end of the ulna.
La mise en place de vis en pleine épiphyse n'est par ailleurs pas souhaitable compte tenu de la faible prise de ces vis dans l'os spongieux et de la longueur 35 nécessairement limitée de ces vis du fait du risque de conflit qu'elles présentent The establishment of screws in full epiphysis is also undesirable given the low grip of these screws in the cancellous bone and the necessarily limited length of these screws because of the risk of conflict that they present.
avec l'articulation radio-cubitale.with the radio-cubital joint.
La présente invention vise à remédier à l'ensemble de ces inconvénients, en fournissant un matériel d'ostéosynthèse parfaitement adapté au traitement d'un 40 cubitus "long" par ostéotomie. The present invention aims to remedy all of these drawbacks, by providing osteosynthesis equipment perfectly suited to the treatment of a "long" ulna by osteotomy.
Ce matériel comprend, de manière connue en soi, une plaque d'ostéosynthèse This material comprises, in a manner known per se, an osteosynthesis plate
percée de trous pour sa fixation, au moyen de vis, aux parties d'os à réunir. pierced with holes for fixing it, by means of screws, to the bone parts to be joined.
Selon la présente invention, - la plaque est solidaire d'une patte insérable dans la partie d'os distale, raccordée à une des extrémités de cette plaque et formant un angle de l'ordre de 90 avec 5 celle-ci, cette patte insérable présentant, à son extrémité libre, un profil permettant de favoriser sa pénétration dans la partie d'os distale, et - la plaque comprend une lumière proximale longitudinale aménagée au travers d'elle, en un emplacement tel que cette lumière vienne en regard de la partie 10 d'os proximale lorsque ladite patte insérable est engagée dans la partie d'os According to the present invention, the plate is secured to a leg insertable into the distal bone part, connected to one end of this plate and forming an angle of the order of 90 with it, this insertable leg having, at its free end, a profile making it possible to promote its penetration into the part of the distal bone, and - the plate comprises a longitudinal proximal lumen arranged through it, in a location such that this lumen comes opposite the proximal bone portion 10 when said insertable tab is engaged in the bone portion
distale, cette lumière pouvant recevoir une vis à travers d'elle et étant bordée par des parois formant des rampes, ces parois étant telles que, lorsque la tête de la vis engagée dans la lumière vient porter contre elles au cours du vissage de cette vis dans l'os, il en résulte un déplacement longitudinal de la plaque 15 dans le sens du rapprochement des deux parties d'os à réunir. distal, this light being able to receive a screw through it and being bordered by walls forming ramps, these walls being such that, when the head of the screw engaged in the light comes to bear against them during the screwing of this screw in the bone, this results in a longitudinal displacement of the plate 15 in the direction of the bringing together of the two parts of bone to be joined.
Ladite patte insérable est ainsi, après ostéotomie, insérée dans la tête du cubitus jusqu'à venue de la plaque à proximité de la corticale cubitale puis ladite vis est engagée dans ladite lumière et est vissée pour provoquer le déplacement 20 longitudinal de la plaque dans le sens du rapprochement des deux parties d'os à Said insertable leg is thus, after osteotomy, inserted into the head of the ulna until the plate comes close to the ulnar cortex then said screw is engaged in said lumen and is screwed to cause the longitudinal displacement of the plate in the sense of bringing the two bone parts together
réunir, jusqu'à coaptation de ces parties d'os. reunite, until coaptation of these bone parts.
D'autres vis sont ensuite mises en place au travers des trous que comprend la plaque puis dans l'os, pour parfaitement fixer la plaque à l'os. 25 Le matériel selon la présente invention permet, grâce à ladite patte insérable, de réaliser une coupe osseuse du cubitus au niveau de la tête cubitale, dans laquelle le cubitus présente une forme élargie et comprend une quantité d'os spongieux importante, qui favorisent la fusion solide des parties d'os entre elles. 30 Le rapprochement et la coaptation des parties d'os peuvent être parfaitement contrôlés au moyen du vissage de la vis engagée au travers de ladite lumière, et la Other screws are then placed through the holes in the plate and then into the bone, to perfectly fix the plate to the bone. The material according to the present invention makes it possible, thanks to said insertable tab, to make a bone cut of the ulna at the level of the ulnar head, in which the ulna presents an enlarged shape and comprises a large quantity of cancellous bone, which promote the solid fusion of the bone parts together. The approximation and coaptation of the bone parts can be perfectly controlled by means of the screwing of the screw engaged through said lumen, and the
plaque est parfaitement fixée à l'os grâce aux autres vis mises en place ensuite. plate is perfectly fixed to the bone thanks to the other screws placed afterwards.
Avantageusement, la zone de jonction entre la plaque et ladite patte insérable est déformable, ce qui permet d'orienter cette patte insérable par rapport à la plaque Advantageously, the junction zone between the plate and said insertable tab is deformable, which makes it possible to orient this insertable tab relative to the plate.
en fonction des besoins.depending on the needs.
La plaque peut être elle-même en un matériau, et/ou d'une épaisseur, tel qu'elle 40 est déformable. Cette plaque peut alors être pliée ou cintrée manuellement pour être adaptée à la forme évasée, légèrement conique, de l'extrémité distale du cubitus, ou peut se cintrer d'elle-même lors du serrage des vis qui permettent sa The plate may itself be made of a material, and / or of a thickness such that it is deformable. This plate can then be folded or bent manually to be adapted to the flared, slightly conical shape of the distal end of the ulna, or can bend itself when tightening the screws which allow its
fixation à l'os.fixation to the bone.
La plaque et ladite patte insérable peuvent en particulier être formées par pliage d'une même bande de matériau, notamment du titane. La plaque et la patte The plate and said insertable tab can in particular be formed by folding the same strip of material, in particular titanium. The plate and the leg
insérable peuvent notamment être en titane de 2 mm épaisseur. insertable may in particular be made of 2 mm thick titanium.
La plaque peut comprendre un évidement aménagé dans son épaisseur autour de ladite lumière pour délimiter lesdites parois formant rampes, la largeur de cet The plate may include a recess arranged in its thickness around said lumen to delimit said ramp walls, the width of this
évidement allant en augmentant en direction de ladite patte insérable. recess increasing in the direction of said insertable tab.
Ces parois peuvent notamment être arrondies et la tête de la vis destinée à être 10 engagée dans la lumière peut être en portion de sphère, ce qui permet, outre le déplacement de la plaque lors du serrage de la vis, de pouvoir mettre cette vis en place dans l'os selon une direction non forcément perpendiculaire à la plaque, mais avec une possibilité d'orientation de cette vis par rapport à cette plaque, notamment dans la direction longitudinale de la plaque, en fonction des besoins. 15 Le matériel peut comprendre trois vis pour la fixation de la plaque à l'os après réalisation du rapprochement des deux parties d'os. En particulier, la plaque peut comprendre deux trous situés du côté de la lumière précitée, de part et d'autre de celle-ci, et un trou situé du côté de ladite patte insérable. 20 These walls can in particular be rounded and the head of the screw intended to be engaged in the lumen can be in the portion of a sphere, which allows, in addition to the displacement of the plate during the tightening of the screw, to be able to put this screw in place in the bone in a direction not necessarily perpendicular to the plate, but with a possibility of orientation of this screw relative to this plate, in particular in the longitudinal direction of the plate, as required. The material may include three screws for fixing the plate to the bone after the two parts of bone have been brought together. In particular, the plate may include two holes located on the side of the aforementioned lumen, on either side of the latter, and a hole located on the side of said insertable tab. 20
La description qui va suivre en regard des dessins annexés, donnés à titre d'exemple non limitatif, permettra de mieux comprendre l'invention, les caractéristiques qu'elle présente et les avantages qu'elle est susceptible de The description which follows with reference to the appended drawings, given by way of nonlimiting example, will allow a better understanding of the invention, the characteristics which it presents and the advantages which it is likely to have.
procurer:provide:
La figure 1 en est une vue en perspective. Figure 1 is a perspective view.
La figure 2 est une vue en perspective d'une pièce d'ostéosynthèse qu'il comprend. La figure 3 est une vue en perspective de cette pièce d'ostéosynthèse sous un Figure 2 is a perspective view of an osteosynthesis part which it comprises. Figure 3 is a perspective view of this osteosynthesis part under a
autre angle.another angle.
La figure 4 est une vue de cette pièce d'ostéosynthèse de côté. 35 Figure 4 is a side view of this osteosynthesis part. 35
La figure 5 est une vue de cette pièce d'ostéosynthèse de dessus. Figure 5 is a view of this osteosynthesis part from above.
Les figures 6 à 9 sont des vues de côté d'un cubitus au cours de différentes étapes de traitement au moyen dudit matériel. 40 La figure 1 représente un matériel d'ostéosynthèse 1 permettant le traitement d'un Figures 6 to 9 are side views of an ulna during different stages of treatment with said equipment. 40 Figure 1 represents an osteosynthesis material 1 allowing the treatment of a
cubitus "long" par ostéotomie."long" ulna by osteotomy.
Ce matériel 1 comprend une pièce d'ostéosynthèse 2 percée de trous 3a, 3b et 45 d'une lumière 4, et quatre vis 5, 6 destinées à être engagées respectivement dans ces trous 3a, 3b et dans la lumière 4, pour la fixation de la pièce 2 aux parties d'os This material 1 comprises an osteosynthesis part 2 pierced with holes 3a, 3b and 45 of a lumen 4, and four screws 5, 6 intended to be engaged respectively in these holes 3a, 3b and in lumen 4, for fixing from part 2 to bone parts
à réunir.to be brought together.
Comme le montrent les figures 1 à 5, la pièce 2 présente une forme en "L", c'est5 à-dire comprend une branche 2a de plus grande longueur et une branche 2b de plus faible longueur, la branche 2b étant raccordée à une des extrémités de la As shown in FIGS. 1 to 5, the part 2 has an "L" shape, that is to say comprises a branch 2a of greater length and a branch 2b of shorter length, the branch 2b being connected to a of the ends of the
branche 2a et formant un angle de l'ordre de 90 avec celle-ci. branch 2a and forming an angle of about 90 with it.
La pièce 2 est réalisée par pliage d'une même bande de matériau, notamment du 10 titane de 2 mm épaisseur. The part 2 is produced by folding the same strip of material, in particular titanium 2 mm thick.
La branche 2a comprend les trous 3a, 3b et la lumière 4. L'un des trous 3a est situé du côté de la branche 2b tandis que les trous 3b et la lumière 4 sont groupés et situés à distance de cette branche 2b, les trous 3b étant aménagés de part et 15 d'autre de la lumière 4. The branch 2a includes the holes 3a, 3b and the light 4. One of the holes 3a is located on the side of the branch 2b while the holes 3b and the light 4 are grouped and located at a distance from this branch 2b, the holes 3b being arranged on either side of the light 4.
Les trous 3a, 3b comprennent un lamage pour la réception de la tête des vis 5 afin que ces têtes, après mise en place des vis, ne dépassent pas excessivement audelà de la branche 2a. The holes 3a, 3b include a counterbore for receiving the head of the screws 5 so that these heads, after the screws have been put in place, do not protrude excessively beyond the branch 2a.
La lumière 4 est aménagée de sorte que sa longueur soit parallèle à la longueur The light 4 is arranged so that its length is parallel to the length
de la branche 2a et est bordée par des parois formant des rampes. of branch 2a and is bordered by walls forming ramps.
En référence aux figures 2 et 5, il apparaît que ces parois résultent de 25 l'aménagement d'un évidement 7 dans la branche 2a, allant en s'évasant en With reference to FIGS. 2 and 5, it appears that these walls result from the arrangement of a recess 7 in the branch 2a, going in widening out
direction de la branche 2b. L'évidement 7 passe d'une forme sensiblement hémicylindrique au niveau de son extrémité la plus éloignée de la branche 2b, de diamètre légèrement supérieur au diamètre du corps fileté de la vis 6, à une forme en quart de sphère, de diamètre correspondant au diamètre de la tête de cette vis 30 6. branch branch 2b. The recess 7 passes from a substantially semi-cylindrical shape at its end furthest from the branch 2b, of diameter slightly greater than the diameter of the threaded body of the screw 6, to a quarter-sphere shape, of diameter corresponding to the diameter of the head of this screw 30 6.
Il se comprend aisément que, lorsque la branche 2a est plaquée contre une partie d'os, que la vis 6 est engagée dans la lumière 4 et que la tête de cette vis 6 vient porter contre les parois que délimite l'évidement 7 au cours du vissage de cette vis 35 dans l'os, il en résulte un déplacement longitudinal de la pièce 2 dans le sens du It is easily understood that, when the branch 2a is pressed against a part of bone, that the screw 6 is engaged in the lumen 4 and that the head of this screw 6 comes to bear against the walls which the recess 7 delimits during screwing this screw 35 into the bone, this results in a longitudinal displacement of the part 2 in the direction of
rapprochement de la vis 6 et de la branche 2b. approximation of the screw 6 and of the branch 2b.
La branche 2a est striée sur sa face tournée du côté sur lequel fait saillie la branche 2b et comprend une graduation 8 sur sa face opposée. Comme le montre 40 la figure 5, le "0" de cette graduation 8 est situé au niveau de la branche 2b, et les The branch 2a is striated on its face turned to the side on which the branch 2b projects and includes a graduation 8 on its opposite face. As shown in FIG. 5, the "0" of this graduation 8 is located at the branch 2b, and the
graduations s'étendent entre le trou 3a et le trou 3b le plus proche de ce trou 3a. graduations extend between the hole 3a and the hole 3b closest to this hole 3a.
En outre, comme le montre la figure 5, la branche 3a est pliée transversalement au niveau de sa zone séparant le trou 3a et le trou 3b le plus proche de ce trou 3a, de sorte que les deux portions de la branche 3a séparées par cette pliure forment In addition, as shown in FIG. 5, the branch 3a is folded transversely at its zone separating the hole 3a and the hole 3b closest to this hole 3a, so that the two portions of the branch 3a separated by this fold form
entre elles un angle de l'ordre de deux degrés. between them an angle of the order of two degrees.
La branche 2b présente, à son extrémité libre, un biseau 9 permettant de délimiter une arête vive propre à favoriser la pénétration de cette branche 2b dans la partie The branch 2b has, at its free end, a bevel 9 making it possible to delimit a sharp edge capable of promoting the penetration of this branch 2b into the part
distale du cubitus.distal of the ulna.
Les vis 5 sont des vis à os de type classique, et la vis 6 est une vis à os comprenant un filet de pas plus réduit que celui des vis 5 et une tête de forme hémisphérique. Dans l'exemple représenté, ces vis 5 et 6 comprennent des The screws 5 are bone screws of the conventional type, and the screw 6 is a bone screw comprising a thread with a pitch smaller than that of the screws 5 and a hemispherical head. In the example shown, these screws 5 and 6 include
cavités hexagonales proximales pour leur manipulation. proximal hexagonal cavities for their manipulation.
En pratique, comme le montrent les figures 6 à 9, la branche 2b est insérée dans In practice, as shown in Figures 6 to 9, the branch 2b is inserted in
la partie distale du cubitus, en zone métaphyso-diaphysaire, jusqu'à venue de la branche 2a contre la corticale (cf. figures 6 et 7). Le biseau 9 facilite l'insertion de la branche 2b dans l'os et la pliure précitée de la branche 2a permet à cette branche de s'adapter à la forme légèrement évasée que présente la zone du 20 cubitus 10 dans laquelle la pièce 2 est implantée. the distal part of the ulna, in the metaphyso-diaphyseal zone, until the branch 2a comes up against the cortex (cf. Figures 6 and 7). The bevel 9 facilitates the insertion of the branch 2b into the bone and the aforementioned folding of the branch 2a allows this branch to adapt to the slightly flared shape presented by the area of the ulna 10 in which the part 2 is implanted.
Après insertion de la branche 2b, une vis 5 est mise en place dans le trou 3a puis dans l'os 10 et la vis 6 est mise en place au travers de la lumière 4 puis dans l'os 10, sans engagement toutefois de la tête de cette vis 6 dans l'évidement 7 (cf. 25 figure 7). After insertion of the branch 2b, a screw 5 is placed in the hole 3a then in the bone 10 and the screw 6 is put in place through the lumen 4 then in the bone 10, without however engagement of the head of this screw 6 in the recess 7 (cf. FIG. 7).
Une ostéotomie est ensuite pratiquée au niveau de la zone de la branche 2a séparant le trou 3a et le trou 3b le plus proche de ce trou 3a (cf. figure 8). La graduation 8 permet de repérer l'épaisseur d'os à retirer, et la pièce 2 permet de 30 parfaitement maintenir les parties d'os proximale 10a et distale 10b au cours de An osteotomy is then performed in the area of the branch 2a separating the hole 3a and the hole 3b closest to this hole 3a (cf. FIG. 8). The graduation 8 makes it possible to identify the thickness of bone to be removed, and the part 2 makes it possible to perfectly maintain the proximal 10a and distal 10b bone portions during
cette opération.this operation.
La vis 6 est ensuite serrée, ce qui amène sa tête à prendre appui contre les parois délimitant l'évidement 7, provoquant ainsi le déplacement des deux parties d'os 35 10a, 1Ob dans le sens de leur rapprochement, jusqu'à coaptation de ces parties The screw 6 is then tightened, which causes its head to bear against the walls delimiting the recess 7, thus causing the displacement of the two bone parts 35 10a, 10b in the direction of their approximation, until coaptation of these parts
d'os 1 Oa, 1 Ob.of bone 1 Oa, 1 Ob.
Les formes hémisphériques de la partie distale de l'évidement 7 et de la tête de la vis 6 permettent une mise en place de cette vis 6 selon une direction non 40 strictement perpendiculaire à la longueur de la branche 2a, si besoin est. The hemispherical shapes of the distal part of the recess 7 and of the head of the screw 6 allow this screw 6 to be placed in a direction not 40 strictly perpendicular to the length of the branch 2a, if necessary.
Les deux autres vis 5 sont enfin mises en place dans les trous 3b puis dans l'os The other two screws 5 are finally placed in the holes 3b then in the bone
, afin d'immobiliser complètement la pièce 2 (cf. figure 9). , in order to completely immobilize the part 2 (cf. figure 9).
Comme cela apparaît de ce qui précède, l'invention fournit un matériel présentant, par rapport aux matériels homologues de la technique antérieure, l'avantage déterminant d'être parfaitement adapté au traitement d'un cubitus "long" par ostéotomie. As appears from the above, the invention provides a material having, compared to homologous materials of the prior art, the determining advantage of being perfectly adapted to the treatment of a "long" ulna by osteotomy.
Il doit d'ailleurs être entendu que la description qui précède n'a été donnée qu'a 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 It should moreover 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
équivalent.equivalent.
Claims (10)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR0213956A FR2846870B1 (en) | 2002-11-07 | 2002-11-07 | OSTEOSYNTHESIS EQUIPMENT FOR THE TREATMENT OF A "LONG" CUBITUS |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR0213956A FR2846870B1 (en) | 2002-11-07 | 2002-11-07 | OSTEOSYNTHESIS EQUIPMENT FOR THE TREATMENT OF A "LONG" CUBITUS |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| FR2846870A1 true FR2846870A1 (en) | 2004-05-14 |
| FR2846870B1 FR2846870B1 (en) | 2005-07-01 |
Family
ID=32116452
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| FR0213956A Expired - Fee Related FR2846870B1 (en) | 2002-11-07 | 2002-11-07 | OSTEOSYNTHESIS EQUIPMENT FOR THE TREATMENT OF A "LONG" CUBITUS |
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| FR2846870B1 (en) | 2005-07-01 |
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