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EP3941385A1 - Orthodontic device for expanding the maxilla or the mandible of a patient in the transverse direction, and corresponding method of manufacture - Google Patents

Orthodontic device for expanding the maxilla or the mandible of a patient in the transverse direction, and corresponding method of manufacture

Info

Publication number
EP3941385A1
EP3941385A1 EP20713518.7A EP20713518A EP3941385A1 EP 3941385 A1 EP3941385 A1 EP 3941385A1 EP 20713518 A EP20713518 A EP 20713518A EP 3941385 A1 EP3941385 A1 EP 3941385A1
Authority
EP
European Patent Office
Prior art keywords
housing
patient
orthodontic device
piece assembly
support
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.)
Pending
Application number
EP20713518.7A
Other languages
German (de)
French (fr)
Inventor
Axel DUBOIS
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Sls France
Original Assignee
Sls France
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Sls France filed Critical Sls France
Publication of EP3941385A1 publication Critical patent/EP3941385A1/en
Pending legal-status Critical Current

Links

Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61C—DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
    • A61C7/00—Orthodontics, i.e. obtaining or maintaining the desired position of teeth, e.g. by straightening, evening, regulating, separating, or by correcting malocclusions
    • A61C7/10—Devices having means to apply outwardly directed force, e.g. expanders
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B33—ADDITIVE MANUFACTURING TECHNOLOGY
    • B33Y—ADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL [3-D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3-D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING
    • B33Y10/00—Processes of additive manufacturing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B33—ADDITIVE MANUFACTURING TECHNOLOGY
    • B33Y—ADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL [3-D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3-D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING
    • B33Y80/00—Products made by additive manufacturing

Definitions

  • Orthodontic device for expanding the maxilla or mandible of a patient in the transverse direction and method of manufacturing the same
  • the field of the invention is that of orthodontics and dentofacial orthopedics.
  • the invention relates to an orthodontic device for expanding the maxilla or mandible of a patient in the transverse direction and its method of manufacture.
  • the invention finds an application in particular in the manufacture of circuit breakers.
  • maxillary circuit breakers respectively mandibular circuit breakers, which are placed to widen the maxilla or the mandible of a child, an adolescent or an adult. when it is too narrow.
  • circuit breakers are equipped with a micrometric expansion screw, also called a jack, connected on each side of the palate to rings resting on molars, premolars and / or canines.
  • a micrometric expansion screw also called a jack
  • This circuit breaker of the prior art 10 has two parts 11 and 12 which are each fixed on one side of the mouth, on a first molar and a first premolar, each formed of a ring 13 which is inserted on the first molar and of another ring 14 which is inserted on the first premolar, connected by a metal branch 15 twisted to rest on the molar located between these two teeth.
  • a screw retractor module 18 is mounted between the parts 11 and 12 to which it is connected by two pairs of rigid branches 16 and 17.
  • the pairs of branches 16 and 17 transmit the thrust of the screw retractor module to the parts 11 and 12.
  • an adjustment device allows an orthodontist to regularly adjust the force exerted on the teeth until the desired expansion is obtained.
  • the circuit breaker was obtained by shaping the various branches 15 by twisting using pliers and then welding the distal end of each of the branches of the pairs of branches 16 and 17, which, previously, were also put in shape. shape using pliers and whose length has been adjusted, to the ring 13 or the ring 14.
  • a drawback of this known technique for manufacturing a circuit breaker is that its implementation is complex for a dental prosthetist and that it takes time. Indeed, to twist the branches 15, and must proceed with care and use many pliers, at the risk of breaking the branches 15. Moreover, the welds must be carried out properly so as to be sufficiently regular and strong.
  • the object of the invention is to provide an orthodontic device for expanding the maxilla or the mandible of a patient in the transverse direction which is simple to use.
  • An objective of the invention is also to provide a technique for manufacturing an orthodontic device for expanding the maxilla or the mandible of a patient in the transverse direction which does not require exerting mechanical stresses or thermal stresses. on the constituent material of the device which risks weakening it.
  • Another objective of the invention is to provide such a technique which has a reduced production cost.
  • the invention also aims to provide such a technique which is reliable.
  • Yet another object of the invention is to provide an orthodontic device for expanding the maxilla or the mandible of a patient in the transverse direction which is precisely adapted to the morphology of the patient.
  • an orthodontic device for expanding the maxilla or mandible of a patient in the transverse direction comprising:
  • said first housing, said first branch and said first support means form a first one-piece, seamless assembly obtained by 3D printing, by laser fusion on a powder bed
  • said second housing, said second branch and said second support means form a second one-piece, seamless assembly obtained by 3D printing, by laser fusion on a powder bed.
  • the invention proposes to manufacture in a single piece the support means, the branches and a housing of an expansion screw, using a printing technique by laser fusion on a bed of powder.
  • this device is an orthodontic device for expanding the maxilla and comprises a third branch secured by one end to said first housing and by a second end to said first support means on one or more several teeth and a fourth branch secured by one end to said second housing and by a second end to said second support means on one or more teeth.
  • Such an orthodontic device for expanding the maxilla therefore has four branches.
  • said first one-piece assembly and led it second one-piece assembly are made of cobalt-chrome or of titanium.
  • the first or the second one-piece assembly can be made of steel or any metal or ceramic alloy suitable for use in orthodontics.
  • the invention also relates to a method of manufacturing an orthodontic device for expanding the maxilla or mandible of a patient in the transverse direction, comprising:
  • first housing a first housing, a second housing and screw actuating means making it possible to adjust the spacing between the first and the second housing
  • first branch secured by a first end to said first housing and having at a second end first support means on one or more teeth of the patient
  • second branch secured by a first end to said second housing and having at a second end second means for resting on one or more teeth, comprising the following steps:
  • the invention proposes a method of manufacturing an orthodontic device for expanding the jawbone or the jawbone of a patient in the transverse direction which is particularly simple to implement.
  • the steps of printing and removing the supports can be very largely automated and require very little manual intervention.
  • the removal of the supports can be carried out by machining part of the supports on a milling machine or using a hand mill.
  • the manufacturing method as described above comprises a step of applying a heat treatment to said first one-piece assembly on the first support and to said second one-piece assembly on said second support .
  • the manufacturing method as described above comprises a step of machining an internal thread formed in said first housing or said second housing, intended to receive one end of said screw. .
  • the manufacturing method as described above comprises a step of boring or drilling said first housing and said second housing, so as to create calibrated passages in the housings intended for to receive guide slides.
  • the manufacturing process as described above comprises a step of sanding said first one-piece assembly and said second one-piece assembly.
  • the manufacturing method as described above further comprises a step of tribofinishing said first one-piece assembly and said second one-piece assembly.
  • a one-piece assembly is thus obtained with a particularly neat surface finish.
  • the manufacturing method as described above further comprises a step of polishing and cleaning with dry steam and / or by ultrasound of said first one-piece assembly and said second one-piece assembly prior to the step of mounting the screw actuating means.
  • FIG. 2 is a perspective view of an exemplary embodiment of a first one-piece assembly and of a second one-piece assembly of an orthodontic device according to the invention, before assembly;
  • FIG. 4 is a detail view of the assembly zone of the first one-piece assembly and of the second one-piece assembly presented with reference to FIG. 2;
  • FIG. 4 is a synoptic view, in block diagram form, of the steps of an exemplary embodiment of a method of manufacturing an orthodontic device for expanding the jawbone of a patient in the transverse direction according to the invention
  • FIG. 5 is a view of a 3D digital model of the monobloc assemblies of the orthodontic device mounted on a dental model;
  • FIG. 6 illustrates two monobloc assemblies printed on a manufacturing support.
  • FIG. 2 shows a first one-piece assembly 21 and a second one-piece assembly 22 of an orthodontic device for expanding the jawbone of a patient in the transverse direction, also called a circuit breaker, according to the invention, before assembly.
  • Each of these cobalt-chrome monobloc assemblies 21 and 22 consists of a portion forming a housing 211 or 221 of an expansion screw, from which extend two branches 212 and 213, respectively 222 and 223. At the distal end of branches 212 and 213, or 222 and 223, there are respectively a ring 214 or 224 and a ring 215 or 225.
  • the rings 214 and 215, 224 and 225 respectively, are connected by a support arm 216, respectively 226, with which they form a support portion on two molars and a premolar of the patient.
  • each of the ends of a double screw 31, on which an adjusting member 32 is formed is screwed into an internal thread provided in one of the housings 211 and 221 and one inserts two guide rods, or slides, 33 through bores provided in the housings 211 and 221.
  • the spacing between the boxes 211 and 221 can then be adjusted by acting on the adjustment member 32.
  • FIG. 4 illustrates the steps of an embodiment of a method for manufacturing the circuit breaker according to the invention presented with reference to FIGS. 2 and 3, in the form of a block diagram.
  • a digital impression of the patient's jaw is digitized using an intraoral scanner.
  • an intraoral scanner it can be envisaged to first make an alginate dental impression of the patient's jawbone and to scan it subsequently to obtain a digital impression of the jawbone.
  • a 3D model of the monobloc assemblies 21 and 22 of the orthodontic device for expanding the palate of a patient in the transverse direction is created from the digital impression of the jaw, using CAD software appropriate.
  • CAD software appropriate.
  • To create this model we rely on a library of shapes containing the shapes of expansion screw cases and the branches and rings are modeled using a specific software module.
  • An image 51 of this digital model of the one-piece assemblies 21 and 22 implanted on the digital impression 52 of the jawbone is shown in Figure 5.
  • This model is transmitted, in a step 43, to the control unit of a 3D printer implementing an additive manufacturing process by laser melting a bed of powder, which prints the monobloc assemblies 21 and 22 on a support 61 consisting of a bundle of manufacturing rods, as can be seen in FIG. 6, which is a view of the monobloc assemblies printed on the support 61.
  • a support 61 consisting of a bundle of manufacturing rods
  • FIG. 6 is a view of the monobloc assemblies printed on the support 61.
  • a treatment is applied to the monobloc assemblies printed on the support 61, in order to give them suitable mechanical characteristics.
  • a step 45 the support 61 and the hooking tabs 62 are milled so as to keep only the two one-piece assemblies 21 and 22.
  • the monoblock assemblies are then sanded (step 46), then mechanical-chemical polishing in a tribofinishing machine (step 47), in order to obtain a suitable surface condition.
  • a step 48 the internal threads are also tapped in the housings 211 and 221, making it possible to screw the ends of the double screw into the latter. This operation avoids the release of powder particles when screwing or unscrewing the double screw in the housings.
  • cylindrical openings calibrated in the housings 211 and 221 intended to receive the slides 33 are drilled or bored out.
  • the one-piece assemblies 61 and 62 are subsequently polished (step 49) and cleaned with dry steam, then with ultrasound, to remove from the surface of the single-piece assemblies 61 and 62 any trace of grease or pollutant, and any particles. of residual metal powder (step 410).
  • a step 411 the two one-piece assemblies are assembled by screwing the ends of a double screw 31 into the internal thread provided in one of the boxes and by inserting the guide rods 33 through the boxes 211 and 221.
  • a maxillary circuit breaker is then obtained ready to be placed in the patient's mouth.

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  • Health & Medical Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Materials Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Engineering & Computer Science (AREA)
  • Epidemiology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Animal Behavior & Ethology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Dentistry (AREA)
  • Oral & Maxillofacial Surgery (AREA)
  • Dental Tools And Instruments Or Auxiliary Dental Instruments (AREA)

Abstract

The invention relates to an orthodontic device for expanding the maxilla or the mandible of a patient in the transverse direction and to the method of manufacturing same. According to the invention, a first expansion-screw housing, a first branch and first means of pressing against one or more teeth of the patient form a first seamless one-piece assembly obtained by powder bed fusion, and a second housing, a second branch and second means for pressing against one or more teeth of the patient form a second seamless one-piece assembly obtained by powder bed fusion. The first and second one-piece assemblies are machined to allow the fitting of the screws and of the slides of a screw-type expansion system.

Description

Dispositif orthodontique d'expansion du maxillaire ou de la mandibule d'un patient dans le sens transversal et procédé de fabrication correspondant Orthodontic device for expanding the maxilla or mandible of a patient in the transverse direction and method of manufacturing the same
1. Domaine de l'invention 1. Field of the invention
Le domaine de l'invention est celui de l'orthodontie et de l'orthopédie dento-faciale. The field of the invention is that of orthodontics and dentofacial orthopedics.
Plus précisément, l'invention concerne un dispositif orthodontique d'expansion du maxillaire ou de la mandibule d'un patient dans le sens transversal et son procédé de fabrication. More specifically, the invention relates to an orthodontic device for expanding the maxilla or mandible of a patient in the transverse direction and its method of manufacture.
L'invention trouve notamment une application dans la fabrication de disjoncteurs. The invention finds an application in particular in the manufacture of circuit breakers.
2. Art antérieur 2. Prior art
On connaît des appareils orthodontiques d'expansion maxillaire ou d'expansion mandibulaire, aussi appelés disjoncteurs maxillaires, respectivement disjoncteurs mandibulaires, que l'on pose pour élargir le maxillaire ou la mandibule d'un enfant, d'un adolescent ou d'un adulte lorsque celui-ci est trop étroit. We know orthodontic devices for maxillary expansion or mandibular expansion, also called maxillary circuit breakers, respectively mandibular circuit breakers, which are placed to widen the maxilla or the mandible of a child, an adolescent or an adult. when it is too narrow.
Ces appareils fixes et fabriqués sur mesure permettent d'élargir les sutures palatines médianes et d'écarter les deux os maxillaires, dans le cas d'un disjoncteur maxillaire, ou la mandibule, dans le cas d'un disjoncteur mandibulaire. These fixed, custom-made devices widen the mid-palatal sutures and separate the two maxillary bones, in the case of a maxillary disruptor, or the mandible, in the case of a mandibular disruptor.
Ces disjoncteurs connus sont équipés d'une vis micrométrique d'expansion, aussi appelée vérin, reliée de chaque côté du palais à des bagues s'appuyant sur des molaires, des prémolaires et/ou des canines. These known circuit breakers are equipped with a micrometric expansion screw, also called a jack, connected on each side of the palate to rings resting on molars, premolars and / or canines.
Selon la disposition des appuis, la force exercée par le vérin et l'âge du patient, on obtient un élargissement ou une disjonction des sutures et un élargissement de l'arcade dentaire. Depending on the arrangement of the supports, the force exerted by the jack and the age of the patient, one obtains an enlargement or disjunction of the sutures and a widening of the dental arch.
Sur la figure 1, on a représenté un exemple de disjoncteur maxillaire connu. In Figure 1, there is shown an example of a known maxillary circuit breaker.
Ce disjoncteur de l'art antérieur 10 présente deux pièces 11 et 12 se fixant chacune d'un côté de la bouche, sur une première molaire et une première prémolaire, formées chacune d'une bague 13 qui vient s'enficher sur la première molaire et d'une autre bague 14 venant s'insérer sur la première prémolaire, reliées par une branche métallique 15 tordue pour prendre appui sur la molaire située entre ces deux dents. This circuit breaker of the prior art 10 has two parts 11 and 12 which are each fixed on one side of the mouth, on a first molar and a first premolar, each formed of a ring 13 which is inserted on the first molar and of another ring 14 which is inserted on the first premolar, connected by a metal branch 15 twisted to rest on the molar located between these two teeth.
Un module d'écarteur à vis 18 est monté entre les pièces 11 et 12 auxquels il est relié par deux paires de branches rigides 16 et 17. Les paires de branches 16 et 17 transmettent la poussée du module d'écarteur à vis aux pièces 11 et 12. A screw retractor module 18 is mounted between the parts 11 and 12 to which it is connected by two pairs of rigid branches 16 and 17. The pairs of branches 16 and 17 transmit the thrust of the screw retractor module to the parts 11 and 12.
Sur le module écarteur à vis, un dispositif de réglage permet à un orthodontiste d'ajuster régulièrement la poussée exercée sur les dents jusqu'à ce que l'expansion souhaitée soit obtenue. On the screw retractor module, an adjustment device allows an orthodontist to regularly adjust the force exerted on the teeth until the desired expansion is obtained.
Le disjoncteur a été obtenu en venant mettre en forme par torsion les différents branches 15 à l'aide de pinces puis en soudant l'extrémité distale de chacune des branches des paires de branches 16 et 17, qui, préalablement, ont également été mises en forme à l'aide de pinces et dont la longueur a été ajustée, à la bague 13 ou la bague 14. The circuit breaker was obtained by shaping the various branches 15 by twisting using pliers and then welding the distal end of each of the branches of the pairs of branches 16 and 17, which, previously, were also put in shape. shape using pliers and whose length has been adjusted, to the ring 13 or the ring 14.
Un inconvénient de cette technique de fabrication connue d'un disjoncteur est que sa mise en oeuvre est complexe pour un prothésiste dentaire et qu'elle prend du temps. En effet, pour tordre les branches 15, et doit procéder avec minutie et utiliser de nombreuses pinces, au risque de casser les branches 15. Par ailleurs, les soudures doivent être réalisées convenablement de sorte à être suffisamment régulières et résistantes. A drawback of this known technique for manufacturing a circuit breaker is that its implementation is complex for a dental prosthetist and that it takes time. Indeed, to twist the branches 15, and must proceed with care and use many pliers, at the risk of breaking the branches 15. Moreover, the welds must be carried out properly so as to be sufficiently regular and strong.
Un autre inconvénient de cette technique de fabrication connue d'un disjoncteur est que les branches sont soumises à des contraintes mécaniques pour les mettre en forme, notamment des contraintes de torsion et de flexion, ce qui les fragilise. Another drawback of this known technique for manufacturing a circuit breaker is that the branches are subjected to mechanical stresses in order to shape them, in particular torsional and bending stresses, which weakens them.
Enfin, une oxydation excessive au niveau de la zone de soudure, ou une mauvaise réalisation des soudures, peut provoquer des défauts esthétiques et créer des imperfections de surface qui rendent le disjoncteur difficile à nettoyer et/ou poreux. Finally, excessive oxidation at the level of the weld area, or poor performance of the welds, can cause aesthetic defects and create surface imperfections which make the circuit breaker difficult to clean and / or porous.
3. Objectifs de l'invention L'invention a donc notamment pour objectif de pallier les inconvénients de l'état de la technique cités ci-dessus. 3. Objectives of the invention The object of the invention is therefore in particular to overcome the drawbacks of the state of the art mentioned above.
Plus précisément l'invention a pour objectif de fournir un dispositif orthodontique d'expansion du maxillaire ou de la mandibule d'un patient dans le sens transversal qui soit simple à mettre en oeuvre. More precisely, the object of the invention is to provide an orthodontic device for expanding the maxilla or the mandible of a patient in the transverse direction which is simple to use.
Un objectif de l'invention est également de fournir une technique de fabrication d'un dispositif orthodontique d'expansion du maxillaire ou de la mandibule d'un patient dans le sens transversal qui ne nécessite pas d'exercer des contraintes mécaniques ou des contraintes thermiques sur la matière constitutive du dispositif qui risque de la fragiliser. An objective of the invention is also to provide a technique for manufacturing an orthodontic device for expanding the maxilla or the mandible of a patient in the transverse direction which does not require exerting mechanical stresses or thermal stresses. on the constituent material of the device which risks weakening it.
Un autre objectif de l'invention est de fournir une telle technique qui soit d'un coût de revient réduit. Another objective of the invention is to provide such a technique which has a reduced production cost.
L'invention a également pour objectif de fournir une telle technique qui soit fiable. The invention also aims to provide such a technique which is reliable.
Encore un objectif de l'invention est de fournir un dispositif orthodontique d'expansion du maxillaire ou de la mandibule d'un patient dans le sens transversal qui soit adapté avec précision à la morphologie du patient. Yet another object of the invention is to provide an orthodontic device for expanding the maxilla or the mandible of a patient in the transverse direction which is precisely adapted to the morphology of the patient.
4. Exposé de l'invention 4. Disclosure of the invention
Ces objectifs, ainsi que d'autres qui apparaîtront par la suite sont atteints à l'aide d'un dispositif orthodontique d'expansion du maxillaire ou de la mandibule d'un patient dans le sens transversal, comprenant : These objectives, as well as others which will become apparent later, are achieved with the aid of an orthodontic device for expanding the maxilla or mandible of a patient in the transverse direction, comprising:
- un premier boîtier, un deuxième boîtier et des moyens d'actionnement à vis permettant d'ajuster l'espacement entre le premier et le deuxième boîtier ; a first housing, a second housing and screw actuating means making it possible to adjust the spacing between the first and the second housing;
- au moins une première branche solidarisée par une première extrémité audit premier boîtier et présentant à une deuxième extrémité des premiers moyens d'appui sur une ou plusieurs dents dudit patient, et au moins une deuxième branche solidarisée par une première extrémité audit deuxième boîtier et présentant à une deuxième extrémité des deuxièmes moyens d'appui sur une ou plusieurs dents dudit patient. Selon l'invention, ledit premier boîtier, ladite première branche et lesdits premiers moyens d'appui forment un premier ensemble monobloc, sans soudure, obtenu par impression 3D, par fusion laser sur lit de poudre, et ledit deuxième boîtier, ladite deuxième branche et lesdits deuxième moyens d'appui forment un deuxième ensemble monobloc, sans soudure, obtenu par impression 3D, par fusion laser sur lit de poudre. - at least a first branch secured by a first end to said first housing and having at a second end first support means on one or more teeth of said patient, and at least one second branch secured by a first end to said second housing and having at a second end of the second support means on one or more teeth of said patient. According to the invention, said first housing, said first branch and said first support means form a first one-piece, seamless assembly obtained by 3D printing, by laser fusion on a powder bed, and said second housing, said second branch and said second support means form a second one-piece, seamless assembly obtained by 3D printing, by laser fusion on a powder bed.
Ainsi de façon inédite et particulièrement astucieuse, l'invention propose de fabriquer en une seule pièce les moyens d'appui, les branches et un boîtier d'une vis d'expansion, en utilisant une technique d'impression par fusion laser sur lit de poudre. Thus in a novel and particularly clever way, the invention proposes to manufacture in a single piece the support means, the branches and a housing of an expansion screw, using a printing technique by laser fusion on a bed of powder.
Da ns un mode de réalisation particulier de l'invention, ce dispositif est un dispositif orthodontique d'expansion du maxilla ire et comprend une troisième branche solidarisée par une extrémité audit premier boîtier et par une deuxième extrémité auxdits premiers moyens d'appui sur une ou plusieurs dents et une quatrième branche solidarisée par une extrémité audit deuxième boîtier et par une deuxième extrémité auxdits deuxièmes moyens d'appui sur une ou plusieurs dents. In a particular embodiment of the invention, this device is an orthodontic device for expanding the maxilla and comprises a third branch secured by one end to said first housing and by a second end to said first support means on one or more several teeth and a fourth branch secured by one end to said second housing and by a second end to said second support means on one or more teeth.
Un tel dispositif orthodontiq ue d'expansion du maxilla ire présente donc quatre branches. Such an orthodontic device for expanding the maxilla therefore has four branches.
Selon un aspect particulier de l'invention, ledit premier ensemble monobloc et led it deuxième ensemble monobloc sont en cobalt-chrome ou en titane. Da ns des variantes de ce mode de réalisation, le premier ou le deuxième ensemble monobloc peut être en acier ou en tout alliage métallique ou céramique convena nt à un usage en orthodontie. According to a particular aspect of the invention, said first one-piece assembly and led it second one-piece assembly are made of cobalt-chrome or of titanium. In variants of this embodiment, the first or the second one-piece assembly can be made of steel or any metal or ceramic alloy suitable for use in orthodontics.
L'invention concerne également un procédé de fabrication d'un dispositif orthodontique d'expansion du maxillaire ou de la mandibule d'un patient dans le sens transversal, comprenant : The invention also relates to a method of manufacturing an orthodontic device for expanding the maxilla or mandible of a patient in the transverse direction, comprising:
- un premier boîtier, un deuxième boîtier et des moyens d'actionnement à vis permettant d'ajuster l'espacement entre le premier et le deuxième boîtier ; - une première branche solidarisée par une première extrémité audit premier boîtier et présentant à une deuxième extrémité des premiers moyens d'appui sur une ou plusieurs dents du patient, et une deuxième branche solidarisée par une première extrémité audit deuxième boîtier et présentant à une deuxième extrémité des deuxièmes moyens d'a ppui sur une ou plusieurs dents, comprenant les étapes suivantes : a first housing, a second housing and screw actuating means making it possible to adjust the spacing between the first and the second housing; - a first branch secured by a first end to said first housing and having at a second end first support means on one or more teeth of the patient, and a second branch secured by a first end to said second housing and having at a second end second means for resting on one or more teeth, comprising the following steps:
- création d'un modèle informatique en 3D dudit dispositif à partir d'un moulage dentaire ou d'une empreinte numérique obtenue à l'aide d'un scanner intraoral du maxillaire ou de la mand ibule dudit patient ;- Creation of a 3D computer model of said device from a dental cast or from a digital impression obtained using an intraoral scanner of the jawbone or the mandibula of said patient;
- impression, par fusion laser sur lit de poudre, d'un premier ensemble monobloc formé dudit premier boîtier, de ladite première branche et desdits premiers moyens d'appui sur un premier support et d'un deuxième ensemble monobloc formé dudit deuxième boîtier, de ladite deuxième branche et desdits deuxièmes moyens d'appui sur un deuxième support, ledit premier support et ledit deuxième support étant distincts ou pouvant former un seul et même support ; - Printing, by laser fusion on a powder bed, of a first one-piece assembly formed of said first housing, of said first branch and of said first support means on a first support and of a second one-piece assembly formed of said second housing, of said second branch and said second support means on a second support, said first support and said second support being separate or being able to form one and the same support;
- retrait dudit premier support et dudit deuxième support par polissage et/ou usinage ; - removal of said first support and of said second support by polishing and / or machining;
- montage des moyens d'actionnement à vis entre lesdits premier et deuxième ensembles monoblocs. - Mounting of the screw actuating means between said first and second one-piece assemblies.
Ainsi, l'invention propose un procédé de fabrication d'un dispositif orthodontique d'expansion d u maxillaire ou de la ma ndibule d'un patient dans le sens transversal qui est particulièrement simple à mettre en oeuvre. Notamment, les étapes d'impression et de retrait des supports peuvent être très largement automatisées et ne nécessitent que très peu d'interventions manuelles. Thus, the invention proposes a method of manufacturing an orthodontic device for expanding the jawbone or the jawbone of a patient in the transverse direction which is particularly simple to implement. In particular, the steps of printing and removing the supports can be very largely automated and require very little manual intervention.
On notera par ailleurs que le retrait des supports peut être effectué en usinant une partie des supports sur une fraiseuse ou à l'aide d'une fraise à main . It will also be noted that the removal of the supports can be carried out by machining part of the supports on a milling machine or using a hand mill.
Da ns un mode de réalisation avantageux de l'invention, le procédé de fabrication tel que décrit ci-dessus comprend une étape d'application d'un traitement thermique audit premier ensemble monobloc sur le premier support et audit deuxième ensemble monobloc sur ledit deuxième support. Selon un mode de réalisation préférentiel de l'invention, le procédé de fabrication tel que décrit ci-dessus comprend une étape d'usinage d'un filetage intérieur formé dans ledit premier boîtier ou ledit deuxième boîtier, destiné à recevoir une extrémité de ladite vis. In an advantageous embodiment of the invention, the manufacturing method as described above comprises a step of applying a heat treatment to said first one-piece assembly on the first support and to said second one-piece assembly on said second support . According to a preferred embodiment of the invention, the manufacturing method as described above comprises a step of machining an internal thread formed in said first housing or said second housing, intended to receive one end of said screw. .
On évite ainsi tout relargage de matière à partir du filetage, en cours d'utilisation du dispositif. This prevents any release of material from the thread, during use of the device.
Da ns un mode de réalisation avantageux de l'invention, le procédé de fabrication tel que décrit ci-dessus comprend une étape d'alésage ou de perçage dudit premier boîtier et dudit deuxième boîtier, de sorte à créer des passages calibrés dans les boîtiers destinés à recevoir des coulisseaux de guidage. In an advantageous embodiment of the invention, the manufacturing method as described above comprises a step of boring or drilling said first housing and said second housing, so as to create calibrated passages in the housings intended for to receive guide slides.
Avantageusement, le procédé de fabrication tel que décrit ci-dessus comprend une étape de sablage dudit premier ensemble monobloc et dudit deuxième ensemble monobloc. Advantageously, the manufacturing process as described above comprises a step of sanding said first one-piece assembly and said second one-piece assembly.
Da ns un mode de réalisation avantageux de l'invention, le procédé de fabrication tel que décrit ci-dessus comprend en outre une étape de tribofinition dudit premier ensemble monobloc et dudit deuxième ensemble monobloc. In an advantageous embodiment of the invention, the manufacturing method as described above further comprises a step of tribofinishing said first one-piece assembly and said second one-piece assembly.
On obtient ainsi un ensemble monobloc avec un état de surface particulièrement soigné. A one-piece assembly is thus obtained with a particularly neat surface finish.
Da ns un mode de réalisation particulier de l'invention, le procédé de fabrication tel que décrit ci-dessus comprend en outre une étape de polissage et de nettoyage à la vapeur sèche et/ou par ultrasons dudit premier ensemble monobloc et dudit deuxième ensemble monobloc préalable à l'étape de montage des moyens d'actionnement à vis. In a particular embodiment of the invention, the manufacturing method as described above further comprises a step of polishing and cleaning with dry steam and / or by ultrasound of said first one-piece assembly and said second one-piece assembly prior to the step of mounting the screw actuating means.
5. Liste des figures 5. List of figures
D'a utres caractéristiques et avantages de l'invention apparaîtront plus clairement à la lecture de la description suivante d'un mode de réalisation de l'invention, donné à titre de simple exemple illustratif et non limitatif, et des dessins a nnexés parmi lesquels : Other characteristics and advantages of the invention will emerge more clearly on reading the following description of an embodiment of the invention, given by way of simple illustrative and non-limiting example, and the accompanying drawings, among which :
- La fig ure 1 est une représentation d'un disjoncteur de l'art antérieur ; - La figure 2 est une vue en perspective d'un exemple de mode de réalisation d'un premier ensemble monobloc et d'un deuxième ensemble monobloc d'un dispositif orthodontique selon l'invention, avant assemblage ; - Fig ure 1 is a representation of a circuit breaker of the prior art; FIG. 2 is a perspective view of an exemplary embodiment of a first one-piece assembly and of a second one-piece assembly of an orthodontic device according to the invention, before assembly;
- La figure 4 est une vue de détail de la zone d'assemblage du premier ensemble monobloc et du deuxième ensemble monobloc présentés en référence à la figure 2 ; FIG. 4 is a detail view of the assembly zone of the first one-piece assembly and of the second one-piece assembly presented with reference to FIG. 2;
- La figure 4 est une vus synoptique, sous forme de schéma-bloc, des étapes d'un exemple de mode de réalisation d'un procédé de fabrication d'un dispositif orthodontique d'expansion du maxillaire d'un patient dans le sens transversal selon l'invention ; - Figure 4 is a synoptic view, in block diagram form, of the steps of an exemplary embodiment of a method of manufacturing an orthodontic device for expanding the jawbone of a patient in the transverse direction according to the invention;
- La figure 5 est une vue d'un modèle numérique 3D des ensembles monoblocs du dispositif orthodontique monté sur un modèle dentaire ; - Figure 5 is a view of a 3D digital model of the monobloc assemblies of the orthodontic device mounted on a dental model;
- La figure 6 illustre deux ensembles monoblocs imprimés sur un support de fabrication. - Figure 6 illustrates two monobloc assemblies printed on a manufacturing support.
6. Description détaillée de l'invention 6. Detailed description of the invention
On a représenté sur la figure 2 un premier ensemble monobloc 21 et un deuxième ensemble monobloc 22 d'un dispositif orthodontique d'expansion du maxillaire d'un patient dans le sens transversal, encore appelé disjoncteur, selon l'invention, avant assemblage. FIG. 2 shows a first one-piece assembly 21 and a second one-piece assembly 22 of an orthodontic device for expanding the jawbone of a patient in the transverse direction, also called a circuit breaker, according to the invention, before assembly.
Chacun de ces ensembles monoblocs 21 et 22 en cobalt-chrome est constitué d'une portion formant un boitier 211 ou 221 d'une vis d'expansion, à partir de laquelle s'étendent deux branches 212 et 213, respectivement 222 et 223. A l'extrémité distale des branches 212 et 213, ou 222 et 223, se trouvent respectivement une bague 214 ou 224 et une bague 215 ou 225. Each of these cobalt-chrome monobloc assemblies 21 and 22 consists of a portion forming a housing 211 or 221 of an expansion screw, from which extend two branches 212 and 213, respectively 222 and 223. At the distal end of branches 212 and 213, or 222 and 223, there are respectively a ring 214 or 224 and a ring 215 or 225.
Les bagues 214 et 215, respectivement 224 et 225, sont reliées par un bras d'appui 216, respectivement 226, avec lequel elles forment une portion d'appui sur deux molaires et une prémolaire du patient. The rings 214 and 215, 224 and 225 respectively, are connected by a support arm 216, respectively 226, with which they form a support portion on two molars and a premolar of the patient.
Pour assembler les ensembles monoblocs, on visse chacune des extrémités d'une double vis 31, sur laquelle est formé un organe de réglage 32, dans un filetage interne prévu dans l'un des boitiers 211 et 221 et on insère deux tiges de guidage, ou coulisseaux, 33 au travers d'alésages prévus dans les boitiers 211 et 221. To assemble the one-piece assemblies, each of the ends of a double screw 31, on which an adjusting member 32 is formed, is screwed into an internal thread provided in one of the housings 211 and 221 and one inserts two guide rods, or slides, 33 through bores provided in the housings 211 and 221.
L'écartement entre les boitiers 211 et 221 peut alors être ajusté en agissant sur l'organe de réglage 32. The spacing between the boxes 211 and 221 can then be adjusted by acting on the adjustment member 32.
On a illustré sur la figure 4 les étapes d'un mode de réalisation d'un procédé de fabrication selon l'invention du disjoncteur présenté en référence aux figures 2 et 3, sous forme d'un schéma-bloc. FIG. 4 illustrates the steps of an embodiment of a method for manufacturing the circuit breaker according to the invention presented with reference to FIGS. 2 and 3, in the form of a block diagram.
Dans une première étape 41, on numérise une empreinte numérique du maxillaire du patient à l'aide d'un scanner intraoral. Dans une variante de ce mode de réalisation de l'invention, il peut être envisagé de réaliser dans un premier temps une empreinte dentaire en alginate du maxillaire du patient et de la scanner ultérieurement pour obtenir une empreinte numérique du maxillaire. In a first step 41, a digital impression of the patient's jaw is digitized using an intraoral scanner. In a variant of this embodiment of the invention, it can be envisaged to first make an alginate dental impression of the patient's jawbone and to scan it subsequently to obtain a digital impression of the jawbone.
On crée ensuite, dans une étape 42, un modèle 3D des ensembles monoblocs 21 et 22 du dispositif orthodontique d'expansion du palais d'un patient dans le sens transversal à partir de l'empreinte numérique du maxillaire, en utilisant un logiciel de CAO approprié. Pour créer ce modèle, on s'appuie sur une bibliothèque de formes contenant les formes de boitiers de vis d'expansion et les branches et les bagues sont modélisées à l'aide d'un module logiciel spécifique. Une image 51 de ce modèle numérique des ensembles monoblocs 21 et 22 implanté sur l'empreinte numérique 52 du maxillaire est illustrée sur la figure 5. Then, in a step 42, a 3D model of the monobloc assemblies 21 and 22 of the orthodontic device for expanding the palate of a patient in the transverse direction is created from the digital impression of the jaw, using CAD software appropriate. To create this model, we rely on a library of shapes containing the shapes of expansion screw cases and the branches and rings are modeled using a specific software module. An image 51 of this digital model of the one-piece assemblies 21 and 22 implanted on the digital impression 52 of the jawbone is shown in Figure 5.
Ce modèle est transmis, dans une étape 43, à l'unité de commande d'une imprimante 3D mettant en oeuvre un procédé de fabrication additive par fusion laser d'un lit de poudre, qui imprime les ensembles monoblocs 21 et 22 sur un support 61 constitué d'un faisceau de tiges de fabrication, comme on peut le voir sur la figure 6, qui est une vue des ensembles monoblocs imprimés sur le support 61. Dans une variante de ce mode de réalisation, il peut être envisagé d'imprimer les ensembles monoblocs 21 et 22 sur deux supports distincts. Il convient de noter que pour faciliter les opérations de traitement thermique, et de polissage qui vont suivre, on a prévu d'imprimer sur les ensembles monoblocs 21 et 22 des pattes d'accrochage 62. This model is transmitted, in a step 43, to the control unit of a 3D printer implementing an additive manufacturing process by laser melting a bed of powder, which prints the monobloc assemblies 21 and 22 on a support 61 consisting of a bundle of manufacturing rods, as can be seen in FIG. 6, which is a view of the monobloc assemblies printed on the support 61. In a variant of this embodiment, it can be envisaged to print the monobloc assemblies 21 and 22 on two separate supports. It should be noted that to facilitate the heat treatment and polishing operations which follow, provision has been made to print on the monobloc assemblies 21 and 22 of the fastening tabs 62.
Dans une étape 44, on applique un traitement aux ensembles monoblocs imprimés sur le support 61, afin de leur conférer des caractéristiques mécaniques convenables. In a step 44, a treatment is applied to the monobloc assemblies printed on the support 61, in order to give them suitable mechanical characteristics.
Dans une étape 45, on fraise le support 61 et les pattes d'accrochage 62 afin de ne conserver que les deux ensembles monoblocs 21 et 22. In a step 45, the support 61 and the hooking tabs 62 are milled so as to keep only the two one-piece assemblies 21 and 22.
On procède ensuite à un sablage des ensembles monoblocs (étape 46), puis à un polissage mécano-chimique dans une machine de tribofinition (étape 47), afin d'obtenir un état de surface convenable. The monoblock assemblies are then sanded (step 46), then mechanical-chemical polishing in a tribofinishing machine (step 47), in order to obtain a suitable surface condition.
On taraude par ailleurs, dans une étape 48, des filetages internes dans les boîtiers 211 et 221, permettant de visser les extrémités de la double vis dans ces derniers. Cette opération permet d'éviter un relargage de particules de poudre lorsqu'on visse ou dévisse la double vis dans les boîtiers. Dans cette même étape, on perce ou on alèse des lumières cylindriques calibrées dans les boîtiers 211 et 221 destinées à recevoir les coulisseaux 33. In a step 48, the internal threads are also tapped in the housings 211 and 221, making it possible to screw the ends of the double screw into the latter. This operation avoids the release of powder particles when screwing or unscrewing the double screw in the housings. In this same step, cylindrical openings calibrated in the housings 211 and 221 intended to receive the slides 33 are drilled or bored out.
Les ensembles monoblocs 61 et 62 sont par la suite polis (étape 49) et nettoyés à la vapeur sèche, puis aux ultrasons, pour retirer de la surface des ensembles monoblocs 61 et 62 tout trace de graisse ou de polluant, et d'éventuelles particules de poudre métallique résiduelles (étape 410). The one-piece assemblies 61 and 62 are subsequently polished (step 49) and cleaned with dry steam, then with ultrasound, to remove from the surface of the single-piece assemblies 61 and 62 any trace of grease or pollutant, and any particles. of residual metal powder (step 410).
On assemble finalement, dans une étape 411, les deux ensembles monoblocs en vissant les extrémités d'une double vis 31, dans le filetage interne prévu dans l'un des boitiers et en insérant les tiges de guidage 33 au travers des boitiers 211 et 221. On obtient alors un disjoncteur maxillaire prêt à être posé dans la bouche du patient. Finally, in a step 411, the two one-piece assemblies are assembled by screwing the ends of a double screw 31 into the internal thread provided in one of the boxes and by inserting the guide rods 33 through the boxes 211 and 221. A maxillary circuit breaker is then obtained ready to be placed in the patient's mouth.

Claims

REVENDICATIONS
1. Dispositif orthodontique d'expansion du maxillaire ou de la mandibule d'un patient dans le sens transversal, comprenant : 1. Orthodontic device for expanding the maxilla or mandible of a patient in the transverse direction, comprising:
- un premier boîtier, un deuxième boîtier et des moyens d'actionnement à vis permettant d'ajuster l'espacement entre le premier et le deuxième boîtier ; a first housing, a second housing and screw actuating means making it possible to adjust the spacing between the first and the second housing;
- au moins une première branche solidarisée par une première extrémité audit premier boîtier et présentant à une deuxième extrémité des premiers moyens d'a ppui sur une ou plusieurs dents dudit patient et au moins une deuxième branche solidarisée par une première extrémité audit deuxième boîtier et présenta nt à une deuxième extrémité des deuxièmes moyens d'a ppui sur une ou plusieurs dents dudit patient, - at least a first branch secured by a first end to said first housing and having at a second end first means for pressing on one or more teeth of said patient and at least one second branch secured by a first end to said second housing and has nt at a second end of the second means for resting on one or more teeth of said patient,
caractérisé en ce que ledit premier boîtier, ladite première branche et lesdits premiers moyens d'appui forment un premier ensemble monobloc, sans soudure, obtenu par impression 3D, par fusion laser sur lit de poudre, et led it deuxième boîtier, ladite deuxième branche et lesdits deuxième moyens d'appui forment un deuxième ensemble monobloc, sans soudure, obtenu par impression 3D, par fusion laser sur lit de poudre. characterized in that said first housing, said first branch and said first support means form a first one-piece, seamless assembly obtained by 3D printing, by laser fusion on a powder bed, and led to the second housing, said second branch and said second support means form a second one-piece, seamless assembly obtained by 3D printing, by laser fusion on a powder bed.
2. Dispositif orthodontique selon la revendication 1, caractérisé en ce q u'il est un dispositif orthodontique d'expansion du maxilla ire et comprend une troisième branche solidarisée par une extrémité audit premier boîtier et par une deuxième extrémité auxdits premiers moyens d'appui sur une ou plusieurs dents et une quatrième branche solidarisée par une extrémité audit deuxième boîtier et par une deuxième extrémité auxdits deuxièmes moyens d'appui une ou plusieurs dents. 2. Orthodontic device according to claim 1, characterized in that q u'il is an orthodontic device for expanding the maxilla ire and comprises a third branch secured by one end to said first housing and by a second end to said first bearing means on one or more teeth and a fourth branch secured by one end to said second housing and by a second end to said second support means one or more teeth.
3. Dispositif orthodontique selon l'une quelconque des revendications 1 et 2, caractérisé en ce que ledit premier ensemble monobloc et ledit deuxième ensemble monobloc sont en cobalt-chrome ou en titane. 3. Orthodontic device according to any one of claims 1 and 2, characterized in that said first one-piece assembly and said second one-piece assembly are made of cobalt-chromium or of titanium.
4. Procédé de fabrication d'un dispositif orthodontique d'expansion du maxilla ire ou de la mandibule d'un patient dans le sens transversal, comprenant : 4. A method of manufacturing an orthodontic device for expanding the maxilla or mandible of a patient in the transverse direction, comprising:
- un premier boîtier, un deuxième boîtier et des moyens d'actionnement à vis permettant d'ajuster l'espacement entre le premier et le deuxième boitier ;- a first housing, a second housing and screw actuation means allowing to adjust the spacing between the first and the second box;
- une première branche solidarisée par une première extrémité audit premier boitier et présentant à une deuxième extrémité des premiers moyens d'appui sur une ou plusieurs dents dudit patient et une deuxième branche solidarisée par une première extrémité audit deuxième boitier et présentant à une deuxième extrémité des deuxièmes moyens d'appui sur une ou plusieurs dents dudit patient, - a first branch secured by a first end to said first box and having at a second end first support means on one or more teeth of said patient and a second branch secured by a first end to said second box and having at a second end second support means on one or more teeth of said patient,
caractérisé en ce qu'il comprend les étapes suivantes : characterized in that it comprises the following steps:
- création d'un modèle informatique en 3D dudit dispositif à partir d'un moulage dentaire ou d'une empreinte numérique obtenue à l'aide d'un scanner intraoral du maxillaire ou de la mandibule dudit patient ; - Creation of a 3D computer model of said device from a dental cast or from a digital impression obtained using an intraoral scanner of the jawbone or the mandible of said patient;
- impression, par fusion laser sur lit de poudre, d'un premier ensemble monobloc formé dudit premier boitier, de ladite première branche et desdits premiers moyens d'appui sur un premier support et d'un deuxième ensemble monobloc formé dudit deuxième boitier, de ladite deuxième branche et desdits deuxième moyens d'appui sur un deuxième support, ledit premier support et ledit deuxième support étant distincts ;- Printing, by laser fusion on a powder bed, of a first one-piece assembly formed of said first box, of said first branch and of said first support means on a first support and of a second one-piece assembly formed of said second box, of said second branch and said second support means on a second support, said first support and said second support being separate;
- retrait dudit premier support et dudit deuxième support par polissage et/ou usinage ; - removal of said first support and of said second support by polishing and / or machining;
- montage des moyens d'actionnement à vis entre lesdits premier et deuxième ensembles monoblocs. - Mounting of the screw actuating means between said first and second one-piece assemblies.
5. Procédé de fabrication d'un dispositif orthodontique selon la revendication 4, caractérisé en ce qu'il comprend une étape d'application d'un traitement thermique audit premier ensemble monobloc sur la première base et audit deuxième ensemble monobloc sur la deuxième base. 5. A method of manufacturing an orthodontic device according to claim 4, characterized in that it comprises a step of applying a heat treatment to said first one-piece assembly on the first base and to said second one-piece assembly on the second base.
6. Procédé de fabrication d'un dispositif orthodontique selon l'une quelconque des revendications 4 et 5, caractérisé en ce qu'il comprend en outre une étape d'usinage d'un filetage intérieur formé dans ledit premier boitier ou ledit deuxième boitier, destiné à recevoir une extrémité de ladite vis. 6. A method of manufacturing an orthodontic device according to any one of claims 4 and 5, characterized in that it further comprises a step of machining an internal thread formed in said first housing or said second housing, intended to receive one end of said screw.
7. Procédé de fabrication d'un dispositif orthodontique selon l'une quelconque des revendications 4 à 6, caractérisé en ce qu'il comprend en outre une étape d'alésage ou de perçage dudit premier boîtier et dudit deuxième boîtier, de sorte à créer des passages calibrés dans les boîtiers destinés à recevoir des coulisseaux de guidage. 7. A method of manufacturing an orthodontic device according to any one of claims 4 to 6, characterized in that it further comprises a step of boring or drilling said first housing and said second housing, so as to create calibrated passages in the housings intended to receive guide slides.
8. Procédé de fabrication d'un dispositif orthodontique selon l'un quelconque des revendications 4 à 7, caractérisé en ce qu'il comprend en outre une étape de tribofinition dudit premier ensemble monobloc et dudit deuxième ensemble monobloc. 8. A method of manufacturing an orthodontic device according to any one of claims 4 to 7, characterized in that it further comprises a step of tribofinishing said first one-piece assembly and said second one-piece assembly.
9. Procédé de fabrication d'un dispositif orthodontique selon l'une quelconque des revendications 4 à 8, caractérisé en ce qu'il comprend en outre une étape de polissage et de nettoyage à la vapeur sèche et/ou aux ultrasons dudit premier ensemble monobloc et dudit deuxième ensemble monobloc préalable à l'étape de montage des moyens d'actionnement à vis. 9. A method of manufacturing an orthodontic device according to any one of claims 4 to 8, characterized in that it further comprises a step of polishing and cleaning with dry steam and / or ultrasound of said first one-piece assembly. and said second one-piece assembly prior to the step of mounting the screw actuating means.
10. Procédé de fabrication d'un dispositif orthodontique selon l'une quelconque des revendications 4 à 9, caractérisé en ce qu'il comprend une étape de sablage dudit premier ensemble monobloc et dudit deuxième ensemble monobloc. 10. A method of manufacturing an orthodontic device according to any one of claims 4 to 9, characterized in that it comprises a step of sanding said first one-piece assembly and said second one-piece assembly.
EP20713518.7A 2019-03-19 2020-03-04 Orthodontic device for expanding the maxilla or the mandible of a patient in the transverse direction, and corresponding method of manufacture Pending EP3941385A1 (en)

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FR1902825A FR3093910B1 (en) 2019-03-19 2019-03-19 Orthodontic device for expanding the maxilla or mandible of a patient in the transverse direction and method of manufacturing the same
PCT/EP2020/055729 WO2020187571A1 (en) 2019-03-19 2020-03-04 Orthodontic device for expanding the maxilla or the mandible of a patient in the transverse direction, and corresponding method of manufacture

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US20220202534A1 (en) * 2020-12-29 2022-06-30 Mark A. Payne Distalizer and method of assembly

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US20050186524A1 (en) * 2004-02-24 2005-08-25 Align Technology, Inc. Arch expander

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ITFI20130028A1 (en) * 2013-02-09 2014-08-10 Leone Spa ORTHODONTIC EXPANDER.
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US11045283B2 (en) * 2017-06-09 2021-06-29 Align Technology, Inc. Palatal expander with skeletal anchorage devices

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