WO2015197965A1 - Fragmentable block - Google Patents
Fragmentable block Download PDFInfo
- Publication number
- WO2015197965A1 WO2015197965A1 PCT/FR2015/051663 FR2015051663W WO2015197965A1 WO 2015197965 A1 WO2015197965 A1 WO 2015197965A1 FR 2015051663 W FR2015051663 W FR 2015051663W WO 2015197965 A1 WO2015197965 A1 WO 2015197965A1
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- WIPO (PCT)
- Prior art keywords
- wedge
- layers
- fragmentary
- layer
- thickness
- Prior art date
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Classifications
-
- 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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- 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
- A61F2/30721—Accessories
- A61F2/30734—Modular inserts, sleeves or augments, e.g. placed on proximal part of stem for fixation purposes or wedges for bridging a bone defect
Definitions
- the present invention belongs to the field of wedges used in orthopedic surgery. More particularly, the present invention relates in particular to a shim used in the context of a tibial or femoral osteotomy.
- tibial or femoral osteotomies The aim of tibial or femoral osteotomies is to correct deformity of the lower limb by straightening the tibia or femur. They consist of cutting the bone and straightening the limb. This operation is particularly indicated in the treatment of osteoarthritis.
- the osteotomy by correcting the alignment of the lower limb, helps to rebalance the knee pressures by decreasing them in the osteoarthritic zone to transfer them to the healthy zone.
- the tibial or femoral osteotomy can also correct a valgum genu or a varus.
- the procedure involves cutting the bone below the knee.
- This section can be accompanied by removal of an open bone wedge on the front of the tibia or the addition of a wedge to control the amplitude and direction of recovery desired.
- the practitioner may use a bone wedge taken from the patient (eg autograft).
- the practitioner can also use wedges from a bone bank.
- the third possibility is the placement of a wedge of bone substitute, most often hydroxyapatite.
- shims of different sizes can be used. Indeed, the size of the wedge to be inserted can only be estimated preoperatively but the final height depends on the technical realization and a certain number of parameters during the intervention (eg rupture of the hinge) can vary considerably the height of the hold. Consequently, in anticipation of this type of operation, the practitioner must have shims of different sizes to pose only one.
- the practitioner may be encouraged to compromise by using a shim that is not the ideal height or to use other techniques such as autograft, bone bank, or even surgical cement wedges. that they can make to the block during the operation.
- the wedges currently available are therefore provided in different thicknesses varying, millimeter by millimeter, from four to twenty-one millimeters.
- the manufacturer must therefore provide nineteen different holds for a single use. This entails major logistical problems. First of all, the manufacturer must be able to manufacture all the references and therefore to have as many molds. Then, the management and the volume of the stocks are particularly complex as well as the delivery and the traceability.
- the present invention particularly relates to a fragmentable wedge for orthopedic surgery comprising a front face and a rear face remarkable in that it comprises fracture planes, connecting said front face to said rear face, delimiting superimposed layers.
- Back face refers to the face of the wedge intended to be placed the most inside the bone.
- front face is the face opposite to said rear face.
- Frracture plane refers to a flat area with less mechanical strength than the surrounding layers.
- said fracture plane has a lower shear and / or tensile strength than the surrounding layers.
- said fracture plane has a compressive strength at least equivalent to that of the layers surrounding it.
- the wedge according to the invention has before insertion a maximum thickness greater than or equivalent to that envisaged in the context of a conventional osteotomy.
- the practitioner can then bring the wedge according to the invention to the desired thickness by removing the number of layers required by applying a force at at least one fracture plane. Once in place, the main force exerted on the hold is a pressure perpendicular to the fracture planes which can not cause the separation of the different layers.
- the wedge according to the invention may be wholly or partly made of any material usually used in the field of orthopedics.
- the shim according to the invention consists entirely or partly of a material chosen from the group comprising polyethylene, polymethyl methacrylate, polysulfone, polylactic acid, polydioxanone, polyglycolic acid, hydroxyapatite, tricalcium phosphate, aluminum oxide, zirconia, calcium phosphate ceramics, bioactive glasses, bone xenografts, calcium sulphate, bone allografts, phosphocalcic cements, calcium phosphate nanocrystals, collagen-supported substitutes, coral and mother-of-pearl substitutes, cellular porous aluminas and mixtures of these products.
- the wedge according to the invention consists solely of one of the materials described above.
- said fracture planes comprise material withdrawals.
- said material recesses are perforations extending longitudinally.
- the different layers are associated by keying.
- one of the faces of said layers comprises one or more keys that fit into material recesses present on the face facing the adjacent layer.
- the different layers are bonded together at the level of the fracture plane.
- the fracture plane corresponds to the bonding zone.
- the glue is chosen so as to have a mechanical tensile strength and / or shear lower than that of the layers that surround it.
- said wedge is in the form of a truncated pyramid with a square or rectangular base.
- different fracture planes are preferably arranged radially with respect to each other.
- said wedge has a parallelepipedal shape.
- the different fracture planes are arranged parallel to each other.
- said fragmentable wedge further comprises grooves or notches arranged in the extension of the fracture planes.
- the fragmentable wedge according to the invention comprises two peripheral layers framing internal layers, said inner layers are of identical thickness, one of the peripheral layers has a thickness corresponding to one third of the thickness of the inner layers. and the other peripheral layer has a thickness corresponding to two thirds of the thickness of the inner layers.
- said inner layers have a thickness of 3mm.
- said fragmentable wedge comprises only six inner layers.
- the term "thickness" refers to the thickness of said layer at the front face of the shim according to the invention.
- the particular distribution in inner layers and peripheral layers makes it possible, after fragmentation, to obtain thickness shims that can vary, millimeter by millimeter, from 1 to 21 mm.
- the present invention also relates to a process for the preparation by molding of a wedge according to the invention comprising: a step of casting a layer of said shim, a step of partial or total drying of said layer,
- the drying will be considered sufficient if the layer is sufficiently strong so that the casting of another layer on its surface does not cause mixing between said layers.
- the present invention also relates to another method for preparing a wedge according to the invention.
- the present invention also relates to a method for preparing a wedge according to the invention by stereolithography.
- the present invention also relates to the use of a wedge according to the invention for performing a tibial osteotomy.
- Figure 1 shows a perspective view of an embodiment of a shim according to the invention.
- the shim 10 includes an upper surface 20, a front face 30, a lower surface 40, a first side or side surface 50, a second side or side surface 60, and the rear face 70.
- the shim 10 comprises a plurality of layers 11, in which a lower surface of one layer 11 is adjacent and attached to a top surface of another 11. Between said lower surface and the upper surface 12 is a fracture plane 13.
- the shim 10 comprises a plurality of grooves 71, 31 in the extension of the fracture planes 13.
- the grooves 71, 31 may also be placed slightly above or below the extension of the Fracture plane 13.
- the grooves 71, 31 have a depth sufficient to introduce a tool for levering, by pressing on an upper edge of the groove 71,31, to separate a layer 11 from its adjacent layer 11.
- the grooves 71, 31 have a depth preferably between 0.5 and 5 mm and even more preferably between 0.5 and 2 mm and a width preferably between 0.5 and 2 mm.
- the grooves 21, 31 may in particular have a V-shaped or U-shaped profile.
- first and / or second lateral surfaces 50, 60 may comprise grooves (not shown) respectively, which have characteristics equivalent to the grooves 21, 31.
- the different grooves 71, 31 may extend over the entire length and / or the width of said fragmentable shim 10. Alternatively, they may also extend only over a portion of the length or width of said shearable shim 10.
- the fragmentable wedge 10 presented is of parallelepipedal shape, alternatively, said wedge 10 can take any desirable shape depending on the place of insertion envisaged. It is thus possible to implement cubic wedges or wedge-shaped wedges.
- the shim 10 according to the invention will preferably have a truncated pyramid shape with a square or rectangular base.
- the fragmentable wedge 10 comprises two peripheral layers 12, 12 'enclosing inner layers 14. These are preferably 6 in number and 3 mm thick.
- the peripheral layers 12, 12 ' have a thickness of 1 and 2 mm respectively.
- the dimensions of the shim 10 may be varied as desired or necessary.
- the shim 10 has a width of 15 to 30 mm cm, a length of 20 to 30 mm, a height of 4 to 21 mm.
- the fragmentable shim 10 according to the invention can be obtained by various techniques within the scope of the skilled person.
- the fragmentable shim 10 can be obtained by one-piece molding.
- the mold comprises the indentations making it possible to form the grooves 71, 31.
- the mold may comprise rods, extending horizontally from one of its walls, in order to form the withdrawals of material at the level of the grooves.
- fracture planes 13 can be obtained by inserting a perforated film or a grid during bonding. It is thus possible to cast a first layer 12 ', to let it partially harden and then to lay on its surface said grid or said perforated film at the point where the fracture plane is desired. Then, the adjacent layer 11 is cast. The operation is repeated until the desired number of layers is obtained.
- the layers 11 can be molded separately and subsequently associated. It is thus possible to mold layers 11 comprising on one of their face keys and on the other side of reservations adapted to receive keys.
- the layers can thus be assembled at the Lego® way until you reach the desired height.
- the layers 11 can be associated by gluing.
- the shim 10 according to the invention can be used in all orthopedic procedures and more particularly in the context of an osteotomy of a genu valgum or a genu varum.
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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)
- Prostheses (AREA)
- Materials For Medical Uses (AREA)
Abstract
The present invention relates notably to a block (10) comprising a top surface (20), a front surface (30), a bottom surface (40), a first side or lateral surface (50), a second side or lateral surface (60), and the rear surface (70). The block (10) comprises a plurality of layers (11) in which a bottom surface of one layer (11) is adjacent and fixed to a top surface of another layer (11). Located between said bottom surface and the top surface (12) is a fracture plane (13).
Description
CALE FRAGMENTABLE FRAGMENTABLE HOLD
Domaine technique Technical area
La présente invention appartient au domaine des cales utilisables en chirurgie orthopédique. Plus particulièrement, la présente invention concerne notamment une cale utilisable dans le cadre d'une ostéotomie tibiale ou fémorale. The present invention belongs to the field of wedges used in orthopedic surgery. More particularly, the present invention relates in particular to a shim used in the context of a tibial or femoral osteotomy.
Technique antérieure Prior art
Les ostéotomies tibiales ou fémorales ont pour but de corriger une déformation du membre inférieur en redressant le tibia ou le fémur. Elles consistent à sectionner l'os et à redresser le membre. Cette opération est notamment indiquée dans le traitement de l'arthrose. L'ostéotomie, en corrigeant l'alignement du membre inférieur, permet de rééquilibrer les pressions au niveau du genou en les diminuant au niveau de la zone arthrosique pour les reporter sur la zone saine. L'ostéotomie tibiale ou fémorale peut aussi redresser un genu valgum ou un varus . The aim of tibial or femoral osteotomies is to correct deformity of the lower limb by straightening the tibia or femur. They consist of cutting the bone and straightening the limb. This operation is particularly indicated in the treatment of osteoarthritis. The osteotomy, by correcting the alignment of the lower limb, helps to rebalance the knee pressures by decreasing them in the osteoarthritic zone to transfer them to the healthy zone. The tibial or femoral osteotomy can also correct a valgum genu or a varus.
Dans le cas de l'ostéotomie tibiale, l'intervention consiste à sectionner l'os en dessous du genou. Cette section peut s'accompagner du retrait d'un coin osseux ouvert sur l'avant du tibia ou de l'ajout d'une cale permettant ainsi de contrôler l'amplitude et la direction du redressement souhaitées. In the case of tibial osteotomy, the procedure involves cutting the bone below the knee. This section can be accompanied by removal of an open bone wedge on the front of the tibia or the addition of a wedge to control the amplitude and direction of recovery desired.
Dans le cadre de l'ajout d'une cale, le praticien peut utiliser une cale osseuse prélevée sur le patient (e.g. autogreffe). Afin d'éviter le traumatisme causé par le prélèvement de cette cale, le praticien peut également utiliser des cales provenant d'une banque osseuse. La 3ème possibilité est la mise en place d'une cale en substitut osseux, le plus souvent en hydroxyapatite .
Selon l'importance de l'ostéotomie, des cales de tailles différentes peuvent être utilisées. En effet, la taille de la cale à insérer peut seulement être estimée en préopératoire mais la hauteur définitive dépend de la réalisation technique et un certain nombre de paramètres au cours de l'intervention (e.g. rupture de la charnière) peuvent faire varier considérablement la hauteur de la cale. En conséquence, en prévision de ce type d'opération, le praticien doit disposer de cales de différentes tailles pour n'en poser qu'une seule. As part of adding a wedge, the practitioner may use a bone wedge taken from the patient (eg autograft). In order to avoid the trauma caused by the removal of this wedge, the practitioner can also use wedges from a bone bank. The third possibility is the placement of a wedge of bone substitute, most often hydroxyapatite. Depending on the importance of the osteotomy, shims of different sizes can be used. Indeed, the size of the wedge to be inserted can only be estimated preoperatively but the final height depends on the technical realization and a certain number of parameters during the intervention (eg rupture of the hinge) can vary considerably the height of the hold. Consequently, in anticipation of this type of operation, the practitioner must have shims of different sizes to pose only one.
A défaut, le praticien peut-être incité à faire des compromis en utilisant une cale n'ayant pas la hauteur idéale ou à utiliser d'autres techniques telles que 1' autogreffe, la banque d'os, voire même des cales en ciment chirurgical qu' ils peuvent confectionner au bloc durant l'opération. Otherwise, the practitioner may be encouraged to compromise by using a shim that is not the ideal height or to use other techniques such as autograft, bone bank, or even surgical cement wedges. that they can make to the block during the operation.
Les cales actuellement disponibles sont donc fournies en différentes épaisseurs variant, millimètre par millimètre, de quatre à vingt et un millimètres. Le fabricant doit donc fournir dix-neuf cales différentes pour une seule utilisation. Ceci entraine d'importants problèmes logistiques. Tout d'abord le fabricant doit être capable de fabriquer toutes les références et donc de disposer d'autant de moules. Ensuite, la gestion et le volume des stocks sont particulièrement complexes de même que la livraison et la traçabilité. The wedges currently available are therefore provided in different thicknesses varying, millimeter by millimeter, from four to twenty-one millimeters. The manufacturer must therefore provide nineteen different holds for a single use. This entails major logistical problems. First of all, the manufacturer must be able to manufacture all the references and therefore to have as many molds. Then, the management and the volume of the stocks are particularly complex as well as the delivery and the traceability.
Il existe donc un besoin pour une cale osseuse universelle, utilisable quel que soit le redressement souhaité . There is therefore a need for a universal bone block, usable whatever the desired straightening.
Résumé de l'invention Summary of the invention
Ainsi la présente invention concerne notamment une cale fragmentable pour chirurgie orthopédique comprenant
une face avant et une face arrière remarquable en ce qu'elle comprend des plans de fractures, reliant ladite face avant à ladite face arrière, délimitant des couches superposées . Thus the present invention particularly relates to a fragmentable wedge for orthopedic surgery comprising a front face and a rear face remarkable in that it comprises fracture planes, connecting said front face to said rear face, delimiting superimposed layers.
Dans le cadre de la présente invention, le terme In the context of the present invention, the term
« face arrière » fait référence à la face de la cale destinée à être placée le plus à l'intérieur de l'os. Par analogie, ladite « face avant » est la face opposée à ladite face arrière. "Back face" refers to the face of the wedge intended to be placed the most inside the bone. By analogy, said "front face" is the face opposite to said rear face.
Dans le cadre de la présente invention, le terme In the context of the present invention, the term
« plan de fracture » fait référence à une zone plane présentant une résistance mécanique inférieure à celle des couches l'encadrant. Avantageusement ledit plan de fracture présente une résistance mécanique au cisaillement et/ou à la traction inférieure à celle des couches l'encadrant. Encore plus avantageusement ledit plan de fracture présente une résistance mécanique à la compression au moins équivalente à celle des couches l'encadrant. "Fracture plane" refers to a flat area with less mechanical strength than the surrounding layers. Advantageously, said fracture plane has a lower shear and / or tensile strength than the surrounding layers. Even more advantageously, said fracture plane has a compressive strength at least equivalent to that of the layers surrounding it.
On comprend ainsi que la cale selon l'invention présente avant insertion une épaisseur maximale supérieure ou équivalente à celle envisageable dans le cadre d'une ostéotomie classique. Le praticien pouvant ensuite ramener la cale selon l'invention à l'épaisseur souhaitée en enlevant le nombre de couche nécessaire par application d'une force au niveau d'au moins un plan de fracture. Une fois en place, la principale force exercée sur la cale est une pression perpendiculaire aux plans de fracture qui ne peut entraîner la séparation des différentes couches. It is thus understood that the wedge according to the invention has before insertion a maximum thickness greater than or equivalent to that envisaged in the context of a conventional osteotomy. The practitioner can then bring the wedge according to the invention to the desired thickness by removing the number of layers required by applying a force at at least one fracture plane. Once in place, the main force exerted on the hold is a pressure perpendicular to the fracture planes which can not cause the separation of the different layers.
La cale selon l'invention peut être en tout ou partie constituée de tout matériau utilisé habituellement dans le domaine de l'orthopédie. Avantageusement la cale selon l'invention est constituée en tout ou partie d'un matériau choisi dans le groupe comprenant le polyéthylène, le
polyméthacrylate de méthyle, le polysulfone, l'acide polylactique, le polydioxanone, l'acide polyglycolique, 1' hydroxyapatite, le phosphate tricalcique, l'oxyde d' aluminium, le zircone , les céramiques de phosphates de calcium, les verres bioactifs, les xénogreffes d'os, le sulfate de calcium, les allogreffes d'os, les ciments phosphocalciques , les nanocristaux de phosphate de calcium, les substituts avec support de collagène, les-substituts à base de corail et nacre, les alumines poreuses cellulaires et les mélanges de ces produits. The wedge according to the invention may be wholly or partly made of any material usually used in the field of orthopedics. Advantageously, the shim according to the invention consists entirely or partly of a material chosen from the group comprising polyethylene, polymethyl methacrylate, polysulfone, polylactic acid, polydioxanone, polyglycolic acid, hydroxyapatite, tricalcium phosphate, aluminum oxide, zirconia, calcium phosphate ceramics, bioactive glasses, bone xenografts, calcium sulphate, bone allografts, phosphocalcic cements, calcium phosphate nanocrystals, collagen-supported substitutes, coral and mother-of-pearl substitutes, cellular porous aluminas and mixtures of these products.
Encore plus avantageusement, la cale selon l'invention est uniquement constituée d'un des matériaux décrits ci-dessus. Even more advantageously, the wedge according to the invention consists solely of one of the materials described above.
Selon un mode de réalisation préféré lesdits plans de fracture comprennent des retraits de matières. Selon un mode de réalisation encore plus préféré, lesdits retraits de matière sont des perforations s' étendant longitudinalement . According to a preferred embodiment, said fracture planes comprise material withdrawals. According to an even more preferred embodiment, said material recesses are perforations extending longitudinally.
Selon un autre mode de réalisation, les différentes couches sont associées par clavetage. Dans ce mode de réalisation une des faces desdites couches comprend une ou plusieurs clavettes venant s'insérer dans des retraits de matière présents sur la face en regard de la couche adj acente . According to another embodiment, the different layers are associated by keying. In this embodiment, one of the faces of said layers comprises one or more keys that fit into material recesses present on the face facing the adjacent layer.
Selon un autre mode de réalisation, les différentes couches sont associées par collage au niveau du plan de fracture. Le plan de fracture correspond à la zone de collage. La colle est choisie de sorte à avoir une résistance mécanique à la traction et/ou au cisaillement inférieure à celle des couches qui l'encadrent. According to another embodiment, the different layers are bonded together at the level of the fracture plane. The fracture plane corresponds to the bonding zone. The glue is chosen so as to have a mechanical tensile strength and / or shear lower than that of the layers that surround it.
Selon un mode de réalisation préféré de l'invention, ladite cale a une forme de tronc de pyramide à base carrée ou rectangulaire. Dans ce mode de réalisation préféré les
différents plans de fracture sont préférentiellement disposés radialement les uns par rapport aux autres. According to a preferred embodiment of the invention, said wedge is in the form of a truncated pyramid with a square or rectangular base. In this preferred embodiment, different fracture planes are preferably arranged radially with respect to each other.
Selon un autre mode de réalisation préféré de l'invention, ladite cale a une forme parallélépipédique . Dans ce mode de réalisation les différents plans de fracture sont disposés parallèlement les uns par rapport aux autres. According to another preferred embodiment of the invention, said wedge has a parallelepipedal shape. In this embodiment the different fracture planes are arranged parallel to each other.
Selon un mode de réalisation préféré ladite cale fragmentable comprend en outre des rainures ou encoches disposées dans le prolongement des plans de fracture. According to a preferred embodiment, said fragmentable wedge further comprises grooves or notches arranged in the extension of the fracture planes.
Selon un mode de réalisation préféré, la cale fragmentable selon l'invention comprend deux couches périphériques encadrant des couches internes, lesdites couches internes sont d'épaisseurs identiques, une des couches périphériques a une épaisseur correspondant à un tiers de l'épaisseur des couches internes et l'autre couche périphérique a une épaisseur correspondant à deux tiers de l'épaisseur des couches internes. Selon un mode de réalisation encore plus préféré, lesdites couches internes ont une épaisseur de 3mm. Selon un mode de réalisation tout à fait préféré ladite cale fragmentable comprend uniquement six couches internes. Dans le cadre de la présente invention, le terme « épaisseur » fait référence à l'épaisseur de ladite couche au niveau de la face avant de la cale selon l'invention. According to a preferred embodiment, the fragmentable wedge according to the invention comprises two peripheral layers framing internal layers, said inner layers are of identical thickness, one of the peripheral layers has a thickness corresponding to one third of the thickness of the inner layers. and the other peripheral layer has a thickness corresponding to two thirds of the thickness of the inner layers. According to an even more preferred embodiment, said inner layers have a thickness of 3mm. According to a most preferred embodiment, said fragmentable wedge comprises only six inner layers. In the context of the present invention, the term "thickness" refers to the thickness of said layer at the front face of the shim according to the invention.
Dans le mode de réalisation décrit au paragraphe ci- dessus, la répartition particulière en couches internes et couches périphériques permet d'obtenir, après fragmentation, des cales d'épaisseur pouvant varier, millimètre par millimètre, de 1 à 21mm. In the embodiment described in the above paragraph, the particular distribution in inner layers and peripheral layers makes it possible, after fragmentation, to obtain thickness shims that can vary, millimeter by millimeter, from 1 to 21 mm.
La présente invention concerne également un procédé de préparation par moulage d'une cale selon l'invention comprenant :
une étape de coulage d'une couche de ladite cale, une étape de séchage partielle ou totale de ladite couche, The present invention also relates to a process for the preparation by molding of a wedge according to the invention comprising: a step of casting a layer of said shim, a step of partial or total drying of said layer,
- une étape de coulage d'une nouvelle couche à la surface de la couche précédemment obtenue. - A casting step of a new layer on the surface of the previously obtained layer.
Préférentiellement le séchage sera considéré comme suffisant si la couche est suffisamment solide pour que le coulage d'une autre couche à sa surface n' entraine pas de mélange entre lesdites couches. Preferentially, the drying will be considered sufficient if the layer is sufficiently strong so that the casting of another layer on its surface does not cause mixing between said layers.
La présente invention concerne également un autre procédé de préparation d'une cale selon l'invention. The present invention also relates to another method for preparing a wedge according to the invention.
La présente invention concerne également un procédé de préparation d'une cale selon l'invention par stéréolithographie . The present invention also relates to a method for preparing a wedge according to the invention by stereolithography.
La présente invention concerne également, l'utilisation d'une cale selon l'invention pour la réalisation d'une ostéotomie tibiale. The present invention also relates to the use of a wedge according to the invention for performing a tibial osteotomy.
Brève description des dessins Brief description of the drawings
La figure 1 présente une vue en perspective d'un mode de réalisation d'une cale selon l'invention. Figure 1 shows a perspective view of an embodiment of a shim according to the invention.
Description des modes de réalisation Description of the embodiments
En se référant maintenant à la figure, la cale 10 comprend une surface supérieure 20, une face avant 30, une surface inférieure 40, un premier côté ou surface latérale 50, un deuxième côté ou surface latérale 60, et la face arrière 70. Referring now to the figure, the shim 10 includes an upper surface 20, a front face 30, a lower surface 40, a first side or side surface 50, a second side or side surface 60, and the rear face 70.
La cale 10 comprend une pluralité de couches 11, dans lesquelles une surface inférieure d'une couche 11 est adjacente et fixée à une surface supérieure d'une autre
couche 11. Entre ladite surface inférieure et la surface supérieure 12 se trouve un plan de fracture 13. The shim 10 comprises a plurality of layers 11, in which a lower surface of one layer 11 is adjacent and attached to a top surface of another 11. Between said lower surface and the upper surface 12 is a fracture plane 13.
Dans le mode de réalisation de la figure 1, la cale 10 comprend une pluralité de rainures 71,31 dans le prolongement des plans de fracture 13. Les rainures 71, 31 peuvent également être placées légèrement au-dessus ou en- dessous du prolongement du plan de fracture 13. Les rainures 71, 31 ont une profondeur suffisante pour y introduire un outil permettant de faire levier, en prenant appui sur un bord supérieur de la rainure 71,31, de séparer une couche 11 de sa couche adjacente 11. Les rainures 71, 31 ont une profondeur préférentiellement comprise entre 0.5 et 5 mm et encore plus préférentiellement entre 0.5 et 2mm et une largeur préférentiellement comprise entre 0.5 et 2mm. Les rainures 21, 31 peuvent avoir notamment un profil en V ou en U. In the embodiment of FIG. 1, the shim 10 comprises a plurality of grooves 71, 31 in the extension of the fracture planes 13. The grooves 71, 31 may also be placed slightly above or below the extension of the Fracture plane 13. The grooves 71, 31 have a depth sufficient to introduce a tool for levering, by pressing on an upper edge of the groove 71,31, to separate a layer 11 from its adjacent layer 11. The grooves 71, 31 have a depth preferably between 0.5 and 5 mm and even more preferably between 0.5 and 2 mm and a width preferably between 0.5 and 2 mm. The grooves 21, 31 may in particular have a V-shaped or U-shaped profile.
Par ailleurs, les première et/ou deuxième surfaces latérales 50, 60 peuvent comporter des rainures (non représentées) respectivement, qui ont des caractéristiques équivalentes aux rainures 21, 31. Moreover, the first and / or second lateral surfaces 50, 60 may comprise grooves (not shown) respectively, which have characteristics equivalent to the grooves 21, 31.
Les différentes rainures 71, 31 peuvent s'étendre sur toute la longueur et ou la largeur de ladite cale fragmentable 10. Alternativement, elles peuvent également ne s'étendre que sur une partie de la longueur ou de la largeur de ladite cale fragmentable 10. The different grooves 71, 31 may extend over the entire length and / or the width of said fragmentable shim 10. Alternatively, they may also extend only over a portion of the length or width of said shearable shim 10.
La cale fragmentable 10 présentée est de forme parallélépipédique, alternativement, ladite cale 10 peut prendre toute forme souhaitable en fonction du lieu d'insertion envisagé. Il est ainsi possible de mettre en œuvre des cales cubiques ou en forme de coins. Dans le cadre d'une ostéotomie du tibia, la cale 10 selon l'invention aura préférentiellement une forme de tronc de pyramide à base carrée ou rectangulaire.
La cale fragmentable 10 comprend deux couches périphériques 12, 12' encadrant des couches internes 14. Celle-ci sont préférentiellement au nombre de 6 et ont une épaisseur de 3mm. Par ailleurs, les couches périphériques 12, 12' ont respectivement une épaisseur de 1 et 2mm. The fragmentable wedge 10 presented is of parallelepipedal shape, alternatively, said wedge 10 can take any desirable shape depending on the place of insertion envisaged. It is thus possible to implement cubic wedges or wedge-shaped wedges. In the context of a tibia osteotomy, the shim 10 according to the invention will preferably have a truncated pyramid shape with a square or rectangular base. The fragmentable wedge 10 comprises two peripheral layers 12, 12 'enclosing inner layers 14. These are preferably 6 in number and 3 mm thick. In addition, the peripheral layers 12, 12 'have a thickness of 1 and 2 mm respectively.
Les dimensions de la cale 10 peuvent être modifiées comme souhaité ou nécessaire. Avantageusement, la cale 10 à une largeur de 15 à 30mm cm, une longueur de 20 à 30 mm, une hauteur de 4 à 21 mm. The dimensions of the shim 10 may be varied as desired or necessary. Advantageously, the shim 10 has a width of 15 to 30 mm cm, a length of 20 to 30 mm, a height of 4 to 21 mm.
La cale fragmentable 10 selon l'invention peut être obtenue par différentes techniques à la portée de l'Homme du métier. The fragmentable shim 10 according to the invention can be obtained by various techniques within the scope of the skilled person.
Selon un premier mode de réalisation, la cale fragmentable 10 peut être obtenue par moulage monobloc. Avantageusement, le moule comprend les empreintes permettant de former les rainures 71, 31. Par ailleurs, le moule peut comprendre des tiges, s' étendant horizontalement à partir de l'une de ses parois, afin de former les retraits de matière au niveau des plans de fracture 13. Alternativement, les plans de fracture peuvent être obtenus en insérant un film perforé ou une grille lors du collage. Il est ainsi possible de couler une première couche 12', de la laisser partiellement durcir puis de poser à sa surface ladite grille ou ledit film perforé à l'endroit où le plan de fracture est souhaité. Ensuite, la couche adjacente 11 est coulée. L'opération est répétée jusqu'à l'obtention du nombre de couches souhaité. According to a first embodiment, the fragmentable shim 10 can be obtained by one-piece molding. Advantageously, the mold comprises the indentations making it possible to form the grooves 71, 31. Moreover, the mold may comprise rods, extending horizontally from one of its walls, in order to form the withdrawals of material at the level of the grooves. fracture planes 13. Alternatively, the fracture planes can be obtained by inserting a perforated film or a grid during bonding. It is thus possible to cast a first layer 12 ', to let it partially harden and then to lay on its surface said grid or said perforated film at the point where the fracture plane is desired. Then, the adjacent layer 11 is cast. The operation is repeated until the desired number of layers is obtained.
Selon un deuxième mode de réalisation, les couches 11 peuvent être moulées séparément puis associées ultérieurement. Il est ainsi possible de mouler des couches 11 comprenant sur l'une de leur face des clavettes et sur l'autre face des réservations apte à recevoir des clavettes. Les couches peuvent être ainsi assemblées à la
façon de Lego® jusqu'à obtenir la hauteur souhaitée. Alternativement, les couches 11 peuvent être associées par collage . According to a second embodiment, the layers 11 can be molded separately and subsequently associated. It is thus possible to mold layers 11 comprising on one of their face keys and on the other side of reservations adapted to receive keys. The layers can thus be assembled at the Lego® way until you reach the desired height. Alternatively, the layers 11 can be associated by gluing.
La cale 10 selon l'invention est utilisable dans toutes les procédures d'orthopédie et plus particulièrement dans le cadre d'une ostéotomie d'un genu valgum ou d'un genu varum. The shim 10 according to the invention can be used in all orthopedic procedures and more particularly in the context of an osteotomy of a genu valgum or a genu varum.
Il doit être entendu que l'invention n'est pas limitée aux détails exacts de construction, de fonctionnement, les matériaux exacts ou modes de réalisation représentés et décrits, car des modifications et équivalents seront évidents pour l'homme de l'art.
It should be understood that the invention is not limited to the exact details of construction, operation, exact materials or embodiments shown and described, as modifications and equivalents will be apparent to those skilled in the art.
Claims
REVENDICATIONS
1 - Cale fragmentable (10) pour chirurgie orthopédique comprenant une face avant et une face arrière remarquable en ce qu'elle comprend des plans de fractures (13, reliant ladite face avant à ladite face arrière, délimitant des couches superposées (11). 1 - Fragile wedge (10) for orthopedic surgery comprising a front face and a remarkable rear face in that it comprises fracture planes (13, connecting said front face to said rear face, delimiting superimposed layers (11).
2 - Cale fragmentable (10) selon l'une des revendications précédentes caractérisée en ce qu'elle est constituée en tout ou partie d'un matériau choisi dans le groupe comprenant le polyéthylène, le polyméthacrylate de méthyle, le polysulfone, l'acide polylactique, le polydioxanone, l'acide polyglycolique, l' hydroxyapatite, le phosphate tricalcique, l'oxyde d'aluminium, le zircone , les céramiques de phosphates de calcium, les verres bioactifs, les xénogreffes d'os, le sulfate de calcium, les allogreffes d'os, les ciments phosphocalciques , les nanocristaux de phosphate de calcium, les substituts avec support de collagène, les-substituts à base de corail et nacre, les alumines poreuses cellulaires et les mélanges de ces produits. 2 - fragmentable shim (10) according to one of the preceding claims characterized in that it consists entirely or partly of a material selected from the group consisting of polyethylene, polymethyl methacrylate, polysulfone, polylactic acid , polydioxanone, polyglycolic acid, hydroxyapatite, tricalcium phosphate, aluminum oxide, zirconia, calcium phosphate ceramics, bioactive glasses, bone xenografts, calcium sulphate, bone allografts, phosphocalcic cements, calcium phosphate nanocrystals, collagen-supported substitutes, coral and mother-of-pearl substitutes, cellular porous aluminas and mixtures thereof.
3 - Cale fragmentable (10) selon l'une des revendications précédentes caractérisée en ce que lesdits plans de fracture comprennent des retraits de matières. 3 - fragmentary wedge (10) according to one of the preceding claims characterized in that said fracture planes comprise withdrawals of materials.
4 - Cale fragmentable (10) selon l'une des revendications précédentes caractérisée en ce que les différentes couches sont associées par clavetage.
5 - Cale fragmentable (10) selon l'une des revendications précédentes caractérisée en ce que les différentes couches (11) sont associées par collage au niveau du plan de fracture (13) . 4 - fragmentary wedge (10) according to one of the preceding claims characterized in that the various layers are associated by keying. 5 - fragmentary wedge (10) according to one of the preceding claims characterized in that the various layers (11) are bonded together at the fracture plane (13).
6 - Cale fragmentable (10) selon l'une des revendications précédentes caractérisée en ce qu'elle a une forme de tronc de pyramide à base carrée ou rectangulaire. 7 - Cale fragmentable (10) selon l'une des revendications précédentes caractérisée en ce qu'elle comprend en outre des rainures (71, 31) disposées dans le prolongement des plans de fracture (13) . 8 - Cale fragmentable (10) selon l'une des revendications précédentes caractérisée en ce qu'elle comprend deux couches périphériques (12, 12') encadrant des couches internes (14), en ce que lesdites couches internes (14) sont d'épaisseurs identiques, en ce qu'une des couches périphériques (12) a une épaisseur correspondant à un tiers de l'épaisseur des couches internes (14) et en ce que l'autre couche périphérique (12') a une épaisseur correspondant à deux tiers de l'épaisseur des couches internes ( 14 ) . 6 - fragmentary wedge (10) according to one of the preceding claims characterized in that it has a truncated pyramid shape with square or rectangular base. 7 - fragmentary shim (10) according to one of the preceding claims characterized in that it further comprises grooves (71, 31) disposed in the extension of the fracture planes (13). 8 - fragmentary wedge (10) according to one of the preceding claims characterized in that it comprises two peripheral layers (12, 12 ') framing internal layers (14), in that said inner layers (14) are of identical thicknesses, in that one of the peripheral layers (12) has a thickness corresponding to one third of the thickness of the inner layers (14) and in that the other peripheral layer (12 ') has a thickness corresponding to two third of the thickness of the inner layers (14).
9 - Cale fragmentable (10) selon la revendication précédente caractérisée en ce que lesdites couches internes (14) ont une épaisseur de 3mm. 10 - Cale fragmentable (10) selon l'une des revendications précédentes caractérisée en ce qu'elle comprend uniquement six couches internes (14) .
11 - Procédé de préparation par moulage d'une cale selon l'une des revendications précédentes comprenant : une étape de coulage d'une couche de ladite cale, une étape de séchage partielle ou totale de ladite couche, 9 - fragmentary wedge (10) according to the preceding claim characterized in that said inner layers (14) have a thickness of 3mm. 10 - fragmentary wedge (10) according to one of the preceding claims characterized in that it comprises only six inner layers (14). 11 - Process for the preparation by molding of a wedge according to one of the preceding claims, comprising: a step of casting a layer of said wedge, a step of partial or total drying of said layer,
- une étape de coulage d'une nouvelle couche à la surface de la couche précédemment obtenue.
- A casting step of a new layer on the surface of the previously obtained layer.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR1455808A FR3022450B1 (en) | 2014-06-23 | 2014-06-23 | FRAGMENTABLE HOLD |
FR1455808 | 2014-06-23 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2015197965A1 true WO2015197965A1 (en) | 2015-12-30 |
Family
ID=51830427
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/FR2015/051663 WO2015197965A1 (en) | 2014-06-23 | 2015-06-23 | Fragmentable block |
Country Status (2)
Country | Link |
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FR (1) | FR3022450B1 (en) |
WO (1) | WO2015197965A1 (en) |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2887760A1 (en) * | 2005-06-30 | 2007-01-05 | Kasios Soc Par Actions Simplif | Wedge for e.g. tibial osteotomy, has small base and lateral sides pierced with fine channels, where wedge is formed of ceramic by streolithography and assumes shape of trunk of pyramid with rectangular base |
US20130338781A1 (en) * | 2012-06-14 | 2013-12-19 | Jean-Noel Bordeaux | Implants/Procedures Related to Tibial Tuberosity Advancement |
-
2014
- 2014-06-23 FR FR1455808A patent/FR3022450B1/en not_active Expired - Fee Related
-
2015
- 2015-06-23 WO PCT/FR2015/051663 patent/WO2015197965A1/en active Application Filing
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2887760A1 (en) * | 2005-06-30 | 2007-01-05 | Kasios Soc Par Actions Simplif | Wedge for e.g. tibial osteotomy, has small base and lateral sides pierced with fine channels, where wedge is formed of ceramic by streolithography and assumes shape of trunk of pyramid with rectangular base |
US20130338781A1 (en) * | 2012-06-14 | 2013-12-19 | Jean-Noel Bordeaux | Implants/Procedures Related to Tibial Tuberosity Advancement |
Also Published As
Publication number | Publication date |
---|---|
FR3022450A1 (en) | 2015-12-25 |
FR3022450B1 (en) | 2016-06-24 |
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