FR2783702A1 - Self-locking prosthesis for bone insert has heat activated anchor flanges formed on central core - Google Patents
Self-locking prosthesis for bone insert has heat activated anchor flanges formed on central core Download PDFInfo
- Publication number
- FR2783702A1 FR2783702A1 FR9812394A FR9812394A FR2783702A1 FR 2783702 A1 FR2783702 A1 FR 2783702A1 FR 9812394 A FR9812394 A FR 9812394A FR 9812394 A FR9812394 A FR 9812394A FR 2783702 A1 FR2783702 A1 FR 2783702A1
- Authority
- FR
- France
- Prior art keywords
- self
- fins
- prosthesis
- bone
- locking device
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
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Classifications
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/02—Prostheses implantable into the body
- A61F2/30—Joints
- A61F2/32—Joints for the hip
- A61F2/36—Femoral heads ; Femoral endoprostheses
- A61F2/3662—Femoral shafts
-
- A—HUMAN NECESSITIES
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- A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/02—Prostheses implantable into the body
- A61F2/30—Joints
- A61F2/42—Joints for wrists or ankles; for hands, e.g. fingers; for feet, e.g. toes
- A61F2/4241—Joints for wrists or ankles; for hands, e.g. fingers; for feet, e.g. toes for hands, e.g. fingers
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- A—HUMAN NECESSITIES
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- A61C—DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
- A61C2201/00—Material properties
- A61C2201/007—Material properties using shape memory effect
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- A—HUMAN NECESSITIES
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- A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/02—Prostheses implantable into the body
- A61F2/30—Joints
- A61F2/42—Joints for wrists or ankles; for hands, e.g. fingers; for feet, e.g. toes
- A61F2/4225—Joints for wrists or ankles; for hands, e.g. fingers; for feet, e.g. toes for feet, e.g. toes
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- A—HUMAN NECESSITIES
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- A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/02—Prostheses implantable into the body
- A61F2/30—Joints
- A61F2002/30001—Additional features of subject-matter classified in A61F2/28, A61F2/30 and subgroups thereof
- A61F2002/30003—Material related properties of the prosthesis or of a coating on the prosthesis
- A61F2002/30004—Material related properties of the prosthesis or of a coating on the prosthesis the prosthesis being made from materials having different values of a given property at different locations within the same prosthesis
- A61F2002/30039—Material related properties of the prosthesis or of a coating on the prosthesis the prosthesis being made from materials having different values of a given property at different locations within the same prosthesis differing in shape-memory transition temperatures, e.g. in martensitic transition temperature or in austenitic transition temperature
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- A—HUMAN NECESSITIES
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- A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/02—Prostheses implantable into the body
- A61F2/30—Joints
- A61F2002/30001—Additional features of subject-matter classified in A61F2/28, A61F2/30 and subgroups thereof
- A61F2002/30003—Material related properties of the prosthesis or of a coating on the prosthesis
- A61F2002/3006—Properties of materials and coating materials
- A61F2002/30092—Properties of materials and coating materials using shape memory or superelastic materials, e.g. nitinol
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- A—HUMAN NECESSITIES
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- A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
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- A61F2002/30154—Convex polygonal shapes square
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- A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/02—Prostheses implantable into the body
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- A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/02—Prostheses implantable into the body
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- A61F2002/30001—Additional features of subject-matter classified in A61F2/28, A61F2/30 and subgroups thereof
- A61F2002/30108—Shapes
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- A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/02—Prostheses implantable into the body
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- A61F2002/30001—Additional features of subject-matter classified in A61F2/28, A61F2/30 and subgroups thereof
- A61F2002/30316—The prosthesis having different structural features at different locations within the same prosthesis; Connections between prosthetic parts; Special structural features of bone or joint prostheses not otherwise provided for
- A61F2002/30317—The prosthesis having different structural features at different locations within the same prosthesis
- A61F2002/30326—The prosthesis having different structural features at different locations within the same prosthesis differing in height or in length
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- A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/02—Prostheses implantable into the body
- A61F2/30—Joints
- A61F2002/30001—Additional features of subject-matter classified in A61F2/28, A61F2/30 and subgroups thereof
- A61F2002/30316—The prosthesis having different structural features at different locations within the same prosthesis; Connections between prosthetic parts; Special structural features of bone or joint prostheses not otherwise provided for
- A61F2002/30535—Special structural features of bone or joint prostheses not otherwise provided for
- A61F2002/30574—Special structural features of bone or joint prostheses not otherwise provided for with an integral complete or partial collar or flange
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- A61F2002/30316—The prosthesis having different structural features at different locations within the same prosthesis; Connections between prosthetic parts; Special structural features of bone or joint prostheses not otherwise provided for
- A61F2002/30535—Special structural features of bone or joint prostheses not otherwise provided for
- A61F2002/30579—Special structural features of bone or joint prostheses not otherwise provided for with mechanically expandable devices, e.g. fixation devices
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- A61F2210/0023—Particular material properties of prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof using shape memory or superelastic materials, e.g. nitinol operated at different temperatures whilst inside or touching the human body, heated or cooled by external energy source or cold supply
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- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F2230/00—Geometry of prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof
- A61F2230/0002—Two-dimensional shapes, e.g. cross-sections
- A61F2230/0017—Angular shapes
- A61F2230/0021—Angular shapes square
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F2230/00—Geometry of prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof
- A61F2230/0063—Three-dimensional shapes
- A61F2230/0069—Three-dimensional shapes cylindrical
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F2230/00—Geometry of prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof
- A61F2230/0063—Three-dimensional shapes
- A61F2230/0091—Three-dimensional shapes helically-coiled or spirally-coiled, i.e. having a 2-D spiral cross-section
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F2250/00—Special features of prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof
- A61F2250/0014—Special features of prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof having different values of a given property or geometrical feature, e.g. mechanical property or material property, at different locations within the same prosthesis
- A61F2250/0037—Special features of prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof having different values of a given property or geometrical feature, e.g. mechanical property or material property, at different locations within the same prosthesis differing in height or in length
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F2250/00—Special features of prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof
- A61F2250/0014—Special features of prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof having different values of a given property or geometrical feature, e.g. mechanical property or material property, at different locations within the same prosthesis
- A61F2250/0042—Special features of prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof having different values of a given property or geometrical feature, e.g. mechanical property or material property, at different locations within the same prosthesis differing in shape-memory transition temperatures, e.g. in martensitic transition temperature, in austenitic transition temperature
Landscapes
- Health & Medical Sciences (AREA)
- Orthopedic Medicine & Surgery (AREA)
- Cardiology (AREA)
- Oral & Maxillofacial Surgery (AREA)
- Transplantation (AREA)
- Engineering & Computer Science (AREA)
- Biomedical Technology (AREA)
- Heart & Thoracic Surgery (AREA)
- Vascular Medicine (AREA)
- Life Sciences & Earth Sciences (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Prostheses (AREA)
Abstract
Description
DISPOSITIFDEVICE
AUTOBLOQUANTSELF-LOCKING
POUR PROTHESESFOR PROSTHESES
La présente invention concerne un dispositif autobloquant implantable dans des éléments osseux et utilisable plus particulièrement en orthopédie ou ostéosynthèse. On connaît un grand nombre de pièces destinées à être implantées dans des éléments osseux pour constituer des implants proprement dits ou encore des pièces de renforcement. Toutes ces pièces ont comme caractéristique commune de devoir conserver dans le temps une liaison mécanique rigide entre la pièce et l'os dans lequel elles sont implantées. Dans la suite du texte, on appellera simplement The present invention relates to a self-locking device implantable in bone elements and usable more particularly in orthopedics or osteosynthesis. A large number of parts are known which are intended to be implanted in bone elements to constitute implants proper or even reinforcing parts. All of these parts have the common characteristic of having to maintain a rigid mechanical connection between the part and the bone in which they are implanted over time. In the rest of the text, we will simply call
de telles pièces << pièces implantables ">. such "implantable parts">.
Il est connu (FR 85 19365) de constituer une prothèse médicale autobloquante dont la tige est destinée à être insérée dans un os, réalisée en un matériau biologiquement compatible et fendue sur toute sa largeur et sur une partie de sa longueur de façon à former au moins deux branches distinctes (Figure I A), le matériau de la tige étant un matériau à mémoire de forme présentant une température de transformation martensitique inférieure à la température du corps humain. Une telle prothèse médicale autobloquante connue est utilisable de la façon suivante: (a) la pièce est amenée à une température inférieure à la température ambiante, par exemple à environ 0 C, tout en étant déformée pour être amenée dans une configuration dans laquelle les deux branches, 1 et 2, sont rapprochées l'une de l'autre, la pièce conservant ainsi cette configuration tant qu'elle est maintenue à cette température; (b) la pièce est implantée dans un os en étant enfilée dans un trou It is known (FR 85 19365) to constitute a self-locking medical prosthesis, the stem of which is intended to be inserted into a bone, made of a biologically compatible material and split over its entire width and over part of its length so as to form at least two separate branches (Figure IA), the rod material being a shape memory material having a martensitic transformation temperature lower than the temperature of the human body. Such a known self-locking medical prosthesis can be used in the following way: (a) the part is brought to a temperature below ambient temperature, for example at around 0 ° C., while being deformed to be brought into a configuration in which the two branches, 1 and 2, are brought together, the part thus retaining this configuration as long as it is maintained at this temperature; (b) the part is implanted in a bone by being threaded through a hole
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ménagé dans l'os avec un certain jeu entre la pièce et l'os; (c) puis la température du corps humain amène alors la pièce définitivement jusqu'à environ 37 C, ce qui provoque automatiquement la déformation de la pièce qui tend à reprendre sa configuration initiale, c'est à dire une configuration dans laquelle les deux branches, 1 et 2, s'écartent (Figure IB), ce qui génère une force de serrage radiale, F, vers l'extérieur, définitive, qui provoque un formed in the bone with a certain play between the part and the bone; (c) then the temperature of the human body then brings the part definitively up to around 37 C, which automatically causes the deformation of the part which tends to resume its initial configuration, that is to say a configuration in which the two branches , 1 and 2, move apart (Figure IB), which generates a radial clamping force, F, outward, final, which causes a
blocage de la pièce dans l'os.blockage of the part in the bone.
Une telle prothèse autobloquante connue présente pour inconvénient, comme cela est indiqué sur les figures 1A et lB qui illustrent l'art antérieur, que les deux branches, 1 et 2, provoquent, lorsqu'elles s'ouvrent ou s'écartent l'une de l'autre, des forces radiales F dirigées vers l'extérieur qui ne sont pas réparties de façon uniforme sur toute la longueur des branches. Dans la figure 1 C, on a représenté un diagramme qui est destiné à illustrer la répartition de ces forces radiales sur la longueur des branches de la prothèse. On voit qu'une grande partie A de l'extrémité libre des branches ne peut pas être utilisée pour provoquer des forces radiales significatives. On voit aussi que les forces radiales F les plus importantes sont réparties au niveau de la base B des branches, ce qui présente pour inconvénient que l'os peut éclater ou être détérioré dans la zone B qui correspond à ces forces les plus importantes. Or c'est justement dans cette Such a known self-locking prosthesis has the drawback, as indicated in FIGS. 1A and 1B which illustrate the prior art, that the two branches, 1 and 2, cause, when they open or move apart one on the other, outwardly directed radial forces F which are not distributed uniformly over the entire length of the branches. In Figure 1 C, there is shown a diagram which is intended to illustrate the distribution of these radial forces over the length of the branches of the prosthesis. It can be seen that a large part A of the free end of the branches cannot be used to cause significant radial forces. It can also be seen that the most important radial forces F are distributed at the level of the base B of the branches, which has the drawback that the bone can burst or be damaged in the area B which corresponds to these most important forces. It is precisely in this
zone d'extrémité de l'os que l'os est le plus fragile. end region of the bone that the bone is most fragile.
A partir cette structure connue d'une prothèse autobloquante telle que celle représentée sur les figures lA et lB, on pourrait envisager de constituer les branches de la prothèse de façon à ce que leurs formes, lorsqu'elles sont en position écartées l'une de l'autre correspondent à une forme incurvée vers l'extérieur, c'est à dire que les parties d'extrémité libre des deux branches s'écartent l'une de l'autre beaucoup alors que les parties intermédiaires ou les parties de base des deux From this known structure of a self-locking prosthesis such as that shown in FIGS. 1A and 1B, it could be envisaged to constitute the branches of the prosthesis so that their shapes, when they are in the separated position, one of the other correspond to an outwardly curved shape, that is to say that the free end parts of the two branches deviate from one another very much while the intermediate parts or the base parts of the of them
branches ne s'écartent pas du tout ou s'écartent très peu. branches do not deviate at all or deviate very little.
Même si l'on envisage ainsi de jouer sur la forme des branches en vue d'améliorer la répartition des forces Even if we thus plan to play on the shape of the branches in order to improve the distribution of forces
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radiales, cette répartition reste relativement peu satisfaisante radial, this distribution remains relatively unsatisfactory
parce que toujours irrégulières sur la longueur des branches. because always irregular along the length of the branches.
D'autre part, la masse métallique qui constitue ces branches On the other hand, the metallic mass which constitutes these branches
est relativement grande pour des forces radiales suffisantes. is relatively large for sufficient radial forces.
L'invention concerne donc spécifiquement un dispositif autobloquant implantable dans un élément osseux et caractérisé par le fait qu'il comprend sur sa surface externe des excroissances (ailettes ou o0 variantes) réalisées en alliage à mémoire de forme ou superélastique qui vont, de par la température du corps humain ou par un apport extérieur de chaleur, s'expandrent The invention therefore relates specifically to a self-locking device implantable in a bone element and characterized in that it comprises on its external surface protuberances (fins or o0 variants) made of shape memory alloy or superelastic which go, by the temperature of the human body or by an external contribution of heat, expand
afin de bloquer une prothèse.in order to block a prosthesis.
Un objet de la présente invention consiste à proposer un tel dispositif ayant une (ou des) forme spécifique qui permet à la pièce de pouvoir créer des forces radiales vers l'extérieur sensiblement constantes An object of the present invention is to provide such a device having a specific shape (or shapes) which allows the part to be able to create substantially constant outward radial forces.
sur toute la longueur de la pièce.along the entire length of the room.
Un autre objet de la présente invention consiste à proposer une tel dispositif dont la structure permet d'agencer facilement la pièce de façon à ce que le diagramme des forces radiales en fonction de la Another object of the present invention is to provide such a device, the structure of which allows the part to be easily arranged so that the diagram of the radial forces as a function of the
position le long de la pièce puisse être librement réparties. position along the workpiece can be freely distributed.
Un autre objet de la présente invention consiste à proposer une tel dispositif dans lequel la quantité de matériau à mémoire de forme peut être relativement faible tout en permettant de former des Another object of the present invention is to provide such a device in which the quantity of shape memory material can be relatively small while allowing the formation of
forces radiales importantes sur toute la longueur. large radial forces over the entire length.
Ces objets, caractéristiques et avantages, ainsi que d'autres de la présente invention These and other objects, features and advantages of the present invention
seront mieux compris lors de la description détaillée will be better understood during the detailed description
d'exemples de réalisations qui va suivre, illustrée par les figures annexées parmi lesquelles: examples of embodiments which will follow, illustrated by the appended figures among which:
les figures 1A et 1B sont une représentation schémati- FIGS. 1A and 1B are a diagrammatic representation
que d'un dispositif de l'art antérieur qui ici est appli- than of a device of the prior art which here is applied
qué à une prothèse de hanche.than a hip prosthesis.
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La figure 1C est un diagramme, toujours à propos de l'art antérieur, représentant la localisation des forces radiales F. La figure 2 est la représentation globale de l'application de l'invention. La figure 3 montre le dispositif en position FIG. 1C is a diagram, still with reference to the prior art, representing the location of the radial forces F. FIG. 2 is the overall representation of the application of the invention. Figure 3 shows the device in position
fermée, ailettes bloquées contre le corps central. closed, fins blocked against the central body.
La figure 4 représente le même dispositif mais Figure 4 shows the same device but
cette fois avec l'illustration de l'ouverture des ailettes. this time with the illustration of the opening of the fins.
La figure 5 est destinée à montrer la pièce et ses Figure 5 is intended to show the part and its
ailettes fabriquées de manière monobloc. fins manufactured in a single piece.
La figure 6 représente la même pièce mais fabriquée non de manière monobloc mais par ajout de pièces Figure 6 shows the same part but manufactured not in a single piece but by adding parts
à une partie centrale.to a central part.
La figure 7 montre une vue en coupe du dispositif. Figure 7 shows a sectional view of the device.
Les figures 8 et 9 sont des variantes, en coupe, du Figures 8 and 9 are variants, in section, of the
système découlant de cette invention. system arising from this invention.
La figure 10 illustre la mise en place du dispositif Figure 10 illustrates the installation of the device
dans un os.in a bone.
En référence à ces figures, le dispositif revendiqué selon l'invention est constitué d'un élément 3 (Figure 2) comportant sur sa surface extérieure des ailettes ou écailles 4 rattachées au With reference to these figures, the device claimed according to the invention consists of an element 3 (Figure 2) comprising on its outer surface fins or scales 4 attached to the
corps central 5 par leur base 6.central body 5 by their base 6.
Toujours en référence à l'invention, les ailettes 4 sont réalisées en métal en mémoire de forme, c'est à dire avec un alliage tel, que les ailettes après avoir été contraintes le long du corps central (Figure 3) vont par le biais d'un changement de température, se déployer (Figure 4) pour reprendre leur forme initiale qui était ouverte. Ces mêmes Still with reference to the invention, the fins 4 are made of metal in shape memory, that is to say with an alloy such that the fins after being constrained along the central body (Figure 3) go through of a change in temperature, deploy (Figure 4) to return to their original shape which was open. These same
ailettes 4, pour remplir les mêmes fonctions que décrites ci- fins 4, to perform the same functions as described below
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dessus, peuvent être en alliage superélastique ou tous matériaux biocompatibles susceptibles de leur donner, de par leur élasticité, la possibilité d'être contraintes dans un premier temps puis, dans un second, de se déployer en développant et conservant une force suffisante pour se above, may be made of superelastic alloy or any biocompatible material capable of giving them, by virtue of their elasticity, the possibility of being constrained firstly then, secondly, of being deployed by developing and retaining sufficient force to be
bloquer dans un os.block in a bone.
En référence à l'invention, ces ailettes 4 peuvent être taillées soit dans un bloc de métal qui constitue alors le corps central (Figure 5). Les ailettes 4 sont alors détachées par usinage en les conservant bien entendu rattachées au corps central 5 With reference to the invention, these fins 4 can be cut either from a metal block which then constitutes the central body (Figure 5). The fins 4 are then detached by machining, of course keeping them attached to the central body 5
par leur base 6.by their base 6.
Une variante (Figure 6) consiste à rapporter sur le corps central 5 des ailettes 4 toujours fabriquées en métal à mémoire de forme ou autre métal adéquat. Ces ailettes peuvent être, par exemple, une tôle dans laquelle ont été détachées les ailettes par poinçonnage, matricage.. .Dans ce cas de figure, la tôle repliée sur elle-même en un cylindre par exemple peut soit être fixée fortement sur le corps central (Figure 6) ou être laissé creuse pour, par exemple, faire coulisser une tige comme dans certains modèles de prothèses de doigt ou d'orteil ou toutes prothèses demandant un tel coulissement. Il est possible aussi de disposer sur le corps central 5 des inserts supportant les ailettes 4. En effet, vu le coût du métal à mémoire de forme, s'il paraît concevable de fabriquer une petite prothèse, par exemple pour un doigt, il est nécessaire de trouver des solutions moins onéreuses pour des prothèses plus importantes comme celle de la hanche ou du genou tout en conservant A variant (Figure 6) consists in attaching to the central body 5 fins 4 always made of memory metal or other suitable metal. These fins can be, for example, a sheet in which the fins have been detached by punching, stamping ... In this case, the sheet folded back on itself into a cylinder for example can either be fixed strongly on the body central (Figure 6) or be left hollow to, for example, slide a rod as in some models of finger or toe prostheses or all prostheses requiring such sliding. It is also possible to have on the central body 5 inserts supporting the fins 4. Indeed, given the cost of shape memory metal, if it seems conceivable to manufacture a small prosthesis, for example for a finger, it is need to find cheaper solutions for larger prostheses such as the hip or knee while keeping
les bénéfices de l'invention.the benefits of the invention.
Une autre variante selon le dispositif de 1 'invention, peut être trouvée dans la forme des ailettes. Celles-ci, au lieu de se déplacer d'une manière radiale perpendiculaire (Figure 7) par rapport au corps central (5), vont s'expanser circulairement. Dans un premier temps ( Figure 8), les ailettes 7 sont maintenues comprimées autour de l'axe central 8. Puis, après mise en place (Figure 9), les ailettes 7 toujours par le biais de la chaleur vont s'expanser dans le tunnel creusé dans l'os et bloquer la prothèse. Bien Another variant according to the device of one invention can be found in the shape of the fins. These, instead of moving radially perpendicularly (Figure 7) relative to the central body (5), will expand circularly. Firstly (Figure 8), the fins 7 are kept compressed around the central axis 8. Then, after installation (Figure 9), the fins 7 still through heat will expand in the tunnel dug into the bone and block the prosthesis. Well
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évidemment, il est revendiqué les mêmes possibilités que décrites plus haut en ce qui concerne les ailettes à partir d'un corps central plein ou découpées en tôle par exemple et obviously, the same possibilities are claimed as described above with regard to the fins from a solid central body or cut from sheet metal for example and
rapportées sur la dite pièce centrale. reported on the said central part.
Par ailleurs, en se référant à l'invention, et à son adaptation, il est bien évident, que la disposition,, la forme, la longueur ou la largeur des ailettes peuvent être différentes voire même sur la même pièce, afin de s'adapter aux exigences de celle-ci en ce qui concerne les forces radiales à appliquer en tel ou tel point de la prothèse afin d'apporter au chirurgien, et au patient, tous les bénéfices qu'il peut attendre de ce nouveau dispositif. Car si l'on reprend le fondement même de ladite invention, il est nécessaire de rappeler qu'elle est basée sur la nécessité de pallier aux inconvénients décrits plus haut par rapport à la tige connue par exemple, qui n'exerce pas les bonnes pressions Furthermore, with reference to the invention, and to its adaptation, it is obvious that the arrangement, the shape, the length or the width of the fins can be different or even on the same part, in order to adapt to the requirements thereof with regard to the radial forces to be applied at such or such point of the prosthesis in order to bring to the surgeon, and to the patient, all the benefits which he can expect from this new device. Because if we take the very foundation of said invention, it is necessary to remember that it is based on the need to overcome the drawbacks described above compared to the known rod for example, which does not exert the right pressures
d'autoblocage aux bons emplacements. in the right places.
Par ailleurs, il est indispensable de rappeler que l'inconvénient majeur d'une prothèse fixée dans un os à été de tous temps le descellement de celle-ci. Dans le but d'éviter ce problème, de multiples solutions ont été proposées telles que l'ajout d'un " ciment " ou la mise en force de la prothèse ou encore des prothèses avec pas de vis. A ce jour, toutes ces solutions ont encore cours ce qui laisse à penser, et c'est l'opinion des chirurgiens orthopédistes, qu'aucune n'a donné de meilleurs résultats que les autres. Il faut savoir en effet, et cela a une importance capitale dans la mise au point de l'invention, que lorsque l'on introduit un corps étranger dans le canal médullaire d'un os, celui-ci au fil du temps réagit en " fuyant " littéralement devant ce corps étranger d'o le phénomène de descellement. Sur le vu de la figure lB, on peut aisément imaginer les inconvénients pour le patient porteur d'une telle prothèse qui sent celle-ci "< flotter " sans Furthermore, it is essential to remember that the major drawback of a prosthesis fixed in a bone has always been the loosening of the latter. In order to avoid this problem, multiple solutions have been proposed such as adding a "cement" or strengthening the prosthesis or prostheses with no screws. To date, all these solutions are still in use, which suggests, and this is the opinion of orthopedic surgeons, that none has given better results than the others. It is necessary to know indeed, and this is of capital importance in the development of the invention, that when one introduces a foreign body into the medullary canal of a bone, this one over time reacts in " fleeing "literally before this foreign body from which the phenomenon of loosening. In the light of FIG. 1B, one can easily imagine the drawbacks for the patient wearing such a prosthesis who feels that it "floats" without
omettre les douleurs et l'impotence ainsi engendrées. omit the pains and helplessness thus engendered.
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Aussi, d'une manière avantageuse, l'objet de l'invention (figure 2) est destiné à pallier à ces inconvénients sans omettre qu'elle ne peut que faciliter la tâche du chirurgien qui, comme dans le cas actuel de mise en place en force d'une prothèse sans ciment, doit travailler très précisément. En effet, les ailettes autobloqueront d'elles-mêmes la prothèse, quand bien même le forage du tunnel dans la partie médullaire de l'os n'aurait pas été réalisé très précisément. Sans oublier, qu'étant donné qu'au fil du temps, toutes les prothèses,qu'elles aient été Also, advantageously, the object of the invention (Figure 2) is intended to overcome these drawbacks without forgetting that it can only facilitate the task of the surgeon who, as in the current case of placement in force of a cementless prosthesis, must work very precisely. In fact, the fins will automatically block the prosthesis, even though the tunneling in the medullary part of the bone would not have been carried out very precisely. Without forgetting, that given that over time, all prostheses, whether they were
mises en force ou avec ciment, ont tendance à se desceller. put in force or with cement, tend to loosen.
Ici, grâce aux ailettes qui, de par la température du corps humain, conserveront toujours toutes leurs propriétés d'expansion, les ailettes donc vont constamment rattraper le "jeu " qui pourrait s'installer entre la prothèse et canal médullaire de l'os. ' Ce dispositif implantable, qui peut s'appliquer à toutes prothèses ( hanche, genou, articulaires en tous genres(Figure ), voire implant dentaire), n'est pas limité aux modes de réalisations qui ont été décrits ici uniquement à titre d'exemples non limitatifs, mais l'invention s'étend à toutes les variantes imaginables qui restent dans l'esprit et dans le Here, thanks to the fins which, due to the temperature of the human body, will always retain all of their expansion properties, the fins will therefore constantly catch up with the "play" that could take place between the prosthesis and the spinal canal of the bone. 'This implantable device, which can be applied to all prostheses (hip, knee, joint of all kinds (Figure), even dental implant), is not limited to the embodiments which have been described here only by way of nonlimiting examples, but the invention extends to all the imaginable variants which remain in the spirit and in the
cadre général de l'invention.general framework of the invention.
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Claims (4)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
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FR9812394A FR2783702B1 (en) | 1998-09-29 | 1998-09-29 | SELF-LOCKING DEVICE FOR PROSTHESES |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR9812394A FR2783702B1 (en) | 1998-09-29 | 1998-09-29 | SELF-LOCKING DEVICE FOR PROSTHESES |
Publications (2)
Publication Number | Publication Date |
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FR2783702A1 true FR2783702A1 (en) | 2000-03-31 |
FR2783702B1 FR2783702B1 (en) | 2001-01-19 |
Family
ID=9531157
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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FR9812394A Expired - Fee Related FR2783702B1 (en) | 1998-09-29 | 1998-09-29 | SELF-LOCKING DEVICE FOR PROSTHESES |
Country Status (1)
Country | Link |
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FR (1) | FR2783702B1 (en) |
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WO2005094706A1 (en) * | 2004-03-31 | 2005-10-13 | Orthofix S.R.L. | Intramedullary nail comprising elements of shape-memory material |
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US8460293B2 (en) | 2010-12-31 | 2013-06-11 | Orthofix S.R.L. | Intramedullary nail with shape memory elements for elongated bones |
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AU2005229558B2 (en) * | 2004-03-31 | 2010-07-08 | Orthofix S.R.L. | Intramedullary nail comprising elements of shape-memory material |
WO2005094706A1 (en) * | 2004-03-31 | 2005-10-13 | Orthofix S.R.L. | Intramedullary nail comprising elements of shape-memory material |
US8162942B2 (en) | 2004-03-31 | 2012-04-24 | Orthofix S.R.L. | Intramedullary nail comprising elements of shape-memory material |
EP1820462A1 (en) | 2004-03-31 | 2007-08-22 | ORTHOFIX S.r.l. | Intramedullary nail comprising elements of shape-memory material |
EP1815813A3 (en) * | 2004-03-31 | 2007-10-24 | ORTHOFIX S.r.l. | Intramedullary nail comprising elements of shape-memory material |
US9283007B2 (en) | 2005-04-14 | 2016-03-15 | Stryker European Holdings I, Llc | Device for osteosyntheses or arthrodeses of two- bone parts, in particular of the hand and / or foot |
US9492215B2 (en) | 2005-04-14 | 2016-11-15 | Stryker European Holdings I, Llc | Method of osteosyntheses or arthrodeses of two- bone parts, in particular of the hand and / or foot |
FR2884406A1 (en) * | 2005-04-14 | 2006-10-20 | Memometal Technologies Soc Par | INTRAMEDULAR OSTEOSYNTHESIS DEVICE OF TWO BONE PARTS, IN PARTICULAR HAND AND / OR FOOT |
US10022167B2 (en) | 2005-04-14 | 2018-07-17 | Stryker European Holdings I, Llc | Method of osteosyntheses or arthrodesis of two-bone parts, in particular of the hand and / or foot |
US11478285B2 (en) | 2005-04-14 | 2022-10-25 | Stryker European Operations Holdings Llc | Device for osteosyntheses or arthrodesis of two-bone parts, in particular of the hand and/or foot |
US11006984B2 (en) | 2005-04-14 | 2021-05-18 | Stryker European Operations Holdings Llc | Device for osteosyntheses or arthrodesis of two-bone parts, in particular of the hand and / or foot |
WO2006109004A1 (en) * | 2005-04-14 | 2006-10-19 | Memometal Technologies | Intramedullar osteosynthetic device of two bone parts, in particular of the hand and/or foot |
US10912594B2 (en) | 2007-03-20 | 2021-02-09 | Stryker European Holdings I, Llc | Osteosynthesis device |
US9161789B2 (en) | 2007-03-20 | 2015-10-20 | Memometal Technologies | Osteosynthesis device |
US9839453B2 (en) | 2007-03-20 | 2017-12-12 | Stryker European Holdings I, Llc | Osteosynthesis device |
DE102007045886B4 (en) * | 2007-09-25 | 2016-05-19 | Zimmer Gmbh | Foot surgery bone plate, a wrapping system and fixation system |
DE102007045886A1 (en) * | 2007-09-25 | 2009-04-16 | Normed Medizin-Technik Vertriebs-Gmbh | Foot surgery-bone plate for impact system and fixing system, has proximal section with proximal fixing opening and distal section with distal fixing opening |
US9168074B2 (en) | 2008-09-09 | 2015-10-27 | Memometal Technologies | Resorptive intramedullary implant between two bones or two bone fragments |
US10383671B2 (en) | 2008-09-09 | 2019-08-20 | Stryker European Holdings I, Llc | Resorptive intramedullary implant between two bones or two bone fragments |
US8414583B2 (en) | 2008-09-09 | 2013-04-09 | Memometal Technologies | Resorptive intramedullary implant between two bones or two bone fragments |
US9044287B2 (en) | 2010-06-02 | 2015-06-02 | Wright Medical Technology, Inc. | Hammer toe implant method |
US9724140B2 (en) | 2010-06-02 | 2017-08-08 | Wright Medical Technology, Inc. | Tapered, cylindrical cruciform hammer toe implant and method |
US9603643B2 (en) | 2010-06-02 | 2017-03-28 | Wright Medical Technology, Inc. | Hammer toe implant with expansion portion for retrograde approach |
US9877753B2 (en) | 2010-06-02 | 2018-01-30 | Wright Medical Technology, Inc. | Orthopedic implant kit |
US9949775B2 (en) | 2010-06-02 | 2018-04-24 | Wright Medical Technology, Inc. | Hammer toe implant with expansion portion for retrograde approach |
US10736676B2 (en) | 2010-06-02 | 2020-08-11 | Wright Medical Technology, Inc. | Orthopedic implant kit |
US8460293B2 (en) | 2010-12-31 | 2013-06-11 | Orthofix S.R.L. | Intramedullary nail with shape memory elements for elongated bones |
US8945232B2 (en) | 2012-12-31 | 2015-02-03 | Wright Medical Technology, Inc. | Ball and socket implants for correction of hammer toes and claw toes |
US9504582B2 (en) | 2012-12-31 | 2016-11-29 | Wright Medical Technology, Inc. | Ball and socket implants for correction of hammer toes and claw toes |
US10278828B2 (en) | 2012-12-31 | 2019-05-07 | Wright Medical Technology, Inc. | Ball and socket implants for correction of hammer toes and claw toes |
US9724139B2 (en) | 2013-10-01 | 2017-08-08 | Wright Medical Technology, Inc. | Hammer toe implant and method |
US9675392B2 (en) | 2013-11-19 | 2017-06-13 | Wright Medical Technology, Inc. | Two-wire technique for installing hammertoe implant |
US9498266B2 (en) | 2014-02-12 | 2016-11-22 | Wright Medical Technology, Inc. | Intramedullary implant, system, and method for inserting an implant into a bone |
US10299840B2 (en) | 2014-09-18 | 2019-05-28 | Wright Medical Technology, Inc. | Hammertoe implant and instrument |
US9808296B2 (en) | 2014-09-18 | 2017-11-07 | Wright Medical Technology, Inc. | Hammertoe implant and instrument |
US10080597B2 (en) | 2014-12-19 | 2018-09-25 | Wright Medical Technology, Inc. | Intramedullary anchor for interphalangeal arthrodesis |
US10702318B2 (en) | 2015-03-03 | 2020-07-07 | Howmedica Osteonics Corp. | Orthopedic implant and methods of implanting and removing same |
US9757168B2 (en) | 2015-03-03 | 2017-09-12 | Howmedica Osteonics Corp. | Orthopedic implant and methods of implanting and removing same |
US11672576B2 (en) | 2015-03-03 | 2023-06-13 | Howmedica Osteonics Corp. | Orthopedic implant and methods of implanting and removing same |
CN104720938A (en) * | 2015-04-09 | 2015-06-24 | 徐永清 | Artificial total wrist joint prosthesis made of nickel-titanium memory metal |
US10470807B2 (en) | 2016-06-03 | 2019-11-12 | Stryker European Holdings I, Llc | Intramedullary implant and method of use |
US11272966B2 (en) | 2016-06-03 | 2022-03-15 | Stryker European Operations Holdings Llc | Intramedullary implant and method of use |
US11992248B2 (en) | 2016-06-03 | 2024-05-28 | Stryker European Operations Holdings Llc | Intramedullary implant and method of use |
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WO2022079093A1 (en) * | 2020-10-13 | 2022-04-21 | Waldemar Link Gmbh & Co. Kg | Prostheses with flexible surface lamellas |
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