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    • 专利摘要:
    A removable lingual-vestibular dental alignment device comprising a set of independent clevises (12). The inner part of each sheath (12) has a slot (14) for coupling to an anchorage adhered to the tooth (20) and external elements (13) facilitating the passage of the dental arch (16) with circular section, square and rectangular. A method of manufacturing screeds (12) comprising scanning the mold of the toothing and working on a virtual mold to include the correcting elements. The screeds (12) are obtained after printing the result of the toothing (9) with the various elements and the subsequent stamping process or from the printing of a file corresponding to a virtual screed obtained on the toothing virtual (8) which comprises virtual orthoèdres (4) and virtual semi-spheres (5).
    公开号:CH709323B1
    申请号:CH00948/15
    申请日:2013-01-02
    公开日:2018-06-29
    发明作者:Jiménez Caraballo Santiago
    申请人:Geniova Tech S L；
    IPC主号:
    专利说明:

    Description
    TECHNICAL FIELD The present invention relates to a device for aligning teeth both lingually and vestibularly. This invention is framed in the sector of orthodontic technique, in particular obtaining or maintaining the desired position of the teeth, for example for straightening, leveling and alignment.
    State of the art The Spanish patent ES 2 382 967 entitled "Extractable device for dental alignment" collects the known state of the art concerning devices based on brackets which are joined through adhesives to the teeth and using a high-resistance, memory arc or wire. The operation of these devices is based on a metal wire in the form of a dental arch desired so that it, once implanted in the brackets, exerts a force on the brackets which is transmitted to the teeth and in this way it produces the movement dental parts to the desired position. All these devices cause problems, given the disorders they generate in the mouth of the patient, hygiene due to the difficulty of keeping them clean, especially after meals and those derived from the aesthetic character.
    The Spanish patent 2,382,967 already indicates that “To limit the negative impact on the image of the person, we have designed devices like the known invisible aligner, which is based on a set of yokes or ferrules transparent and plastic which have a certain elasticity, which are put in place by covering the teeth and the ferrules push the teeth towards a desired position ... When the teeth are moved by the action of the ferrule, and the ferrule does not exerts more pressure on them, it is necessary to replace the ferrule with another which continues to push the teeth to the desired position ”.
    Furthermore, compared with the methods for manufacturing dental alignment devices, the following documents are known in the state of the art:
    - Spanish patent 2,367,282 consisting of a process for manufacturing a dental appliance of the aforementioned type (page 3, lines 21 to 24 and fig. 1C). This patent describes "a process for manufacturing a dental appliance (100). The method comprising: providing a digital data set representing a modified tooth arrangement for a patient; controlling a manufacturing machine (322) based on the digital data sets to produce a positive model of the modified tooth arrangement; and produce the braces (100) as a negative of the positive model. " Furthermore, claim 2 establishes that the control step comprises: providing a volume of uncured polymeric resin; laser scanner to selectively harden the resin in a form based on the digital data set to produce the positive model.
    - Spanish patent 2,367,283 "Method for manufacturing a plurality of devices for the incremental adjustment of the dental position", which relates to the manufacture of dental devices of the aforementioned type, that is to say, set of screeds or transparent ferrules (page 2, line 6 and successive and claims).
    In the Spanish patent 2,382,967 a first solution is presented based on a set of yokes which is adhered to a bracket or tube in the form of an orthoedron manually and making it possible to improve the position of the teeth by combining the yoke technique with dental arches and yokes / brackets, which give increased strength to the device for faster tooth movement.
    All that has been mentioned previously does not solve the technical problem derived from the fact of choosing and manually adhering to the own device the best place to locate each bracket and orthoedron on the yokes, or the yokes themselves. Currently, the practitioner or specialized personnel places brackets on the patient's teeth in an artisanal fashion, without having carried out prior visualizations of the alignment and the arch and its corresponding distribution of forces. That is to say, the choice and the installation of the brackets is carried out by the expert or the practitioner in an artisanal way and based on his experience, without using a standardized process for the realization of this action allowing 'ensure the choice and correct position of said elements.
    Explanation of the invention [0007] The present invention shows a dental alignment device with improved copings as well as a manufacturing process which solves the previous problems. The manufacturing process is based on the use of a virtualization system to design the screeds and choose the best arrangement of the elements composing it (brackets and orthoedra) as well as the automation in the screed manufacturing process and if necessary orthohedral projections through which the dental arch passes. The specialist chooses the position of the screeds or brackets on the screeds using specific machines with virtualization software. The manufacture of devices based on yokes having integrated in their lingual or vestibular part the orthoedra through which the arc passes is carried out automatically using specific devices. With this process, we aim to eliminate errors in human ocular perception when choosing the location of the brackets as well as those derived from a manual realization of this technique.
    The tooth correcting device is composed of a set of yokes. Each screed is adapted to the tooth or teeth anatomically and aesthetically due to its transparency. Each screed incorporates one or more
    CH 709 323 B1 elements placed vestibularly or lingually, with the message of torque, inclination and angulation to generate three-dimensional control in dental movement from the incorporation of a nickel-titanium arc, equivalent to those used in fixed devices but applied to screeds, which allows working in a removable manner. These elements can be brackets or orthohedra adhered to the screeds at a determined point as well as on orthoedrons constructed on the same body of the screed during the manufacturing process.
    For this, the device which is the subject of the patent is based on the combination of the use of the bracket technique and the high-resistance arc with the use of tooth caps. In this way, two embodiments of the invention are presented, as well as its manufacturing process.
    First implementation of the device The device is made up of a set of independent yokes fitting into one or more teeth and to which the expert adheres the brackets and the orthoedra of dimensions in a predetermined position. If orthoedra are used, depending on the position where they are located, they will have determined dimensions. This device can include brackets and orthoedra on the vestibular or lingual part. In any case, a distinction is made between:
    - individual copings which fit individually into the teeth to correct their position to which a bracket or orthoedron is adhered.
    - screed serving as anchor and they do it on a single tooth or on several teeth, which is usual for molars. In the latter case, we include a single bracket or orthoedron through which the arch passes and serves as a point of support on the teeth and so that the arch exerts force on the dental parts to be moved.
    The brackets or orthoedra are adhered to the individual yokes in the positions which have previously been determined by a process of virtualization of the patient's teeth and the yokes or the yokes which are anchored on the teeth of the patient. As a result of the manufacturing process, the screeds have a linear shoulder to indicate to the practitioner the position in which the brackets or orthoedra must be adhered. The high-resistance arch, in which the patient's ideal dental arch has previously been memorized, exerts the constant forces on the brackets and orthoedra, which are transmitted to the corresponding screeds through their anchors previously defined through the linear shoulder and glue these to the teeth producing the corresponding correction.
    The memory of the arc is marked by the material in which it is made using steel and nickel-titanium. With the force exerted by the arch and the direction of application using brackets and orthoedra on the screeds, we succeed in improving the position of the teeth, especially in adults, and when the teeth have to travel long distances, that is, more than 0.5 millimeters. To fine-tune, you can use more concrete techniques such as invisible aligners. This technique allows an adult to remove the device quickly and by themselves.
    On the inner part of the yokes is produced obviously in the form of a negative for accommodating anchors so that these recesses serve to position and anchor each yoke to the tooth and to avoid the involuntary vertical displacement of the yokes once located on the teeth.
    The anchors have a specific geometry and are adhered directly to the teeth in a determined position. The geometry of these anchors is designed to facilitate the positioning of the yoke on the tooth as well as its attachment and detachment safely and without causing injuries in the mouth. For the screeds that are the subject of this invention, there are two types of anchors.
    a) Type "tornado" in which the closure is carried out on the basis of bevels or projections. This closure consists of a rectangular figure from which emerge bevels or inclined and oriented projections with a certain tangency with respect to a semi-sphere located on the central part thereof and which collects each of these projections in a determined direction forming a rotation. The elevation of the projections in its path to the semi-sphere together with its orientation will act as a mechanism for closing the anchor with the yokes. Depending on the direction of the bevels, a “tornado” anchor in the clockwise direction and a “tornado” anchor in the counterclockwise direction take place.
    b) Vertical type in which the closure is based on the combination of four basic elements:
    at. Truncated sphere on the upper part which is joined to the cervical area of the tooth so that the yoke does not remain attached. The sphere projects from the top of this closure to protect the tongue from possible injuries due to the contact of the latter with the closure.
    b. Outdoor vertical rectangular orthoedron.
    vs. Horizontal rectangular orthoedron creating the flap to hang the yoke on the tooth and not allow its displacement, by hanging vertically on the yoke. With the combination of the two orthoedra, the cap can only be removed from the tooth by means of a specific vertical movement.
    CH 709 323 B1
    d. Flattened cylinder in the form of a pastille glued to the tooth. The diameter of this cylinder is greater than the length of the vertical orthoedron in order to protect the tongue from possible injuries occurring due to contact with tissues of the mouth.
    The manufacturing process for this device is carried out using electronic devices, computers and specific software. The expert adheres the brackets and the orthoedra and he defines beforehand and with the help of these electronic devices, the position on which these elements must be adhered by means of virtualization of the teeth of the patient to which the corresponding virtual copings are added. Once the position has been chosen, we proceed to manually adhere each of the brackets and orthoedra. In this way, the manufacturing process eliminates a large part of the craft work.
    With this solution, the following problems are solved:
    a) Compared to patents for invisible aligners, this device allows the correction of the position of the teeth in a shorter time due to the force exerted by the arc. In addition, in this case we only use one device, avoiding having to change invisible aligners every month.
    b) Compared to the current technique for correcting the position of teeth using brackets, as in Spanish patent 2 382 967, the problems of directly adhering the brackets to the teeth and manipulating them to introduce the arch are eliminated. in the brackets once they have adhered to the teeth. In addition, other specific and more discreet orthoedra can be used to achieve the same effect, since it is not possible to use devices such as tubes in the form of orthoedra adhered to the teeth.
    c) Compared to the Spanish patent 2,382,967, this new invention is based on the fact of defining with prior art the inclusion of brackets or tubes, the plane common to all. For this reason, all copings are marked with a linear projection indicative of the alignment plane for brackets and orthoedra. In this way we obtain a secure alignment of the teeth, avoiding errors of perception of the human eye when it will be necessary to choose the place where to adhere the orthoedra or brackets. In addition, the inclusion of anchors fixes the yokes to the teeth by improving the corrective effect of the device.
    Copings, like the ferrules used in orthodontics, are put in the mouth using the hands of the own patients and can be removed very easily and without any special technique. The screeds are made of a material with great resistance and elasticity, as can be hard plastics or methacrylate, so that by anchoring in each tooth or set of teeth, they adapt to the geometry of the tooth and they exert sufficient pressure to remain immobilized in them. The positioning of the yokes and the force exerted by the arc in the necessary direction and direction is established during placement in the mouth. This device can be worn in the mouth or stored in a case.
    Second implementation of the device Just as in the previous case, the corrective device is composed of a set of independent yokes, which can fit in a single tooth or in a set of teeth, distinguishing individual yokes which fit into the teeth to correct their position and the yokes serving as anchors. In this case, the device is composed of a set of screeds constructed of a plastic material comprising, in the same body, screeds of orthoedrons with determined dimensions located in the position chosen by the expert during the manufacturing process. As in the previous case, this device can include the orthoedra in the vestibular or lingual part.
    The manufacturing process eliminates a large part of the artisanal work because the expert chooses the position of said tubes and the dimensions of these by means of virtualization of the teeth of the patient to which are added the corresponding virtual yokes. Subsequently, on the basis of the expert's choice, we proceed to the automated manufacture of the yokes comprising in the same body the tubes through which passes the arc which exerts the force on the yokes in order to correct the position of the teeth.
    That is to say, the orthohedral projections are part of the yokes. Therefore, in this case, brackets adhered to the individual screeds are not used. Both the positioning of the orthoedra and their dimensions are determined beforehand by the expert through a process of virtualization of the patient's teeth and the copings. So, in order for the arch to exert force more effectively in the tooth, the expert determines the height of the orthoedra and the location of each one using virtualization programs to obtain greater precision. . In this way, the resulting yokes have the orthoedric projection at the height where the expert considers that the arch must pass. In said orthoedric projection, a perforation is made through which said arc passes.
    With this solution, the following problems are solved, in addition to the problems posed previously:
    - For each yoke, an orthoedric projection with specific dimensions is made to obtain the best result from the force exerted by the arc on the yoke.
    CH 709 323 B1
    - All the protrusions in the form of orthoedra are aligned in the same plane, avoiding handling problems, and errors of ocular appreciation in the positioning of the orthoedra by perspective due to the different positions of the teeth.
    - With this process, we ensure an exact alignment of the arc, because the arrangement of the orthoedra is carried out beforehand through the virtualization process.
    - By being made the screeds and their orthoedrons in a single body, the visual impact of the device is reduced, being better accepted by users. In addition, the step of having to adhere the brackets to the teeth or yokes is eliminated.
    Manufacturing method The manufacturing of the alignment device is carried out through the following steps:
    1) Once we have the model of the patient's teeth, using a standard process using standard occlusion wax, we proceed to scan the model taken from the patient in three-dimensional form. By means of a laser scanning process of said mold, a set of digital data is obtained which represents the dentition of the patient. These digital data represent the geometrical characteristics of the patient's teeth, which serve to virtually represent said teeth and to be able to act on them. The scanning process will not be explained in more detail because it is known in the state of the art, as disclosed in the written opinion of the Spanish patent 2,372,190, page 4/6.
    2) The digital data set representing the scanned model is passed to computer software which virtualizes the patient's teeth model. On this virtualized model, the expert can add and modify the various virtual elements that are added to create the dental alignment device in a virtual manner. To do this, the following steps are carried out:
    at. Creation of orthoedra or square prisms with virtual sections. Based on a library of virtual orthoedra, we choose pyramid-based orthoedra and modify them individually for each tooth of the patient. These virtual orthoedra will then be used to define the orthohedral protrusions of the yokes inside which the arch passes. The key to the success of these devices is to be found in the specific design for each tooth according to the movement sought as well as the positioning thereof.
    b. Choice of the virtual horizontal insertion plan in which the orthoedra are aligned.
    Using specific software, a horizontal plane is established which cuts the teeth on a virtual cutting line. The choice of the plane and the determination of the line of cut establishes the height where the expert controls in a calibrated way the positioning of the virtual orthoedra which are incorporated in each tooth, by creating a horizontal discontinuity according to congestion, which is what which generates the support of the device in the patient's mouth.
    vs. Installation of virtual orthoedra. Once the horizontal insertion plane has been chosen, the virtual orthoedra are placed in said plane in each of the virtual teeth. As explained in section “a”, each orthohedron is personalized according to the room in which the screed will subsequently be inserted and on which the movement must be produced. In this case, we aim for the arc to exert a force on the orthoedron (at this moment, a virtual orthohedron or prism with a section exceeding the tooth) which generates a second message of movement consisting in inserting in the tooth the section unevenly depending on the malposition of the tooth. That is to say, the orthoedron will have a length, a depth or a height more or less important, being more or less inserted on each side, to be able to generate the desired movement on the dental part. In this way, a disparity is created in the positioning and the dimensions of the virtual orthoedra, which will be greater or less depending on the movement that one wishes to achieve. Through virtualization, we can set up the different orthoedra and make the corresponding tests to choose the best combination and in this way increase the effect which originates the force exerted by the arch on the tooth by acting through the orthoedron. and the screed.
    The position of the orthoedra can be lingual, vestibular or a combination of the two, because when they are combined the force generated is greater. This positioning is determined by the movement to be made and the "malpositions" of the teeth.
    The positioning of the orthoedrons is carried out by following a technique of setting up equilibrium, couples and cancellations, because the objective sought is to ensure that the forces exerted by the arch are transmitted to the yokes and the teeth of the same the way brackets do.
    d. Vertical screed control. To improve the anchoring of the yokes on the teeth and avoid the displacement of the yokes by the forces to which they may be subjected, cavities are made inside a few yokes to allow the anchorages adhered directly to the tooth to be inserted into celles5
    CH 709 323 B1 ci. The positioning of the anchors is achieved through the virtualization of the teeth. In this step, the expert or doctor chooses the type of anchoring he wants to use on each tooth on the basis of virtual models stored in a computer and he indicates the position on the virtual teeth where one wishes to adhere future anchors. For this, you can use virtual semi-spheres whose diameter can be modified to adapt it to the yoke and to a specific tooth or use the specific anchor.
    e. As a result, a computer file is obtained, for example of the STL type including all the geometric characteristics of the virtual toothing including a line relating to the horizontal virtual plane, a set of orthoedra of different dimensions and virtual semi-spheres for future control. screeds.
    3) Printing. From the computer file which collects the data concerning the virtual toothing, its orthoedrons, horizontal plane and copings, we proceed to carry out a three-dimensional (3D) printing. In this way, a model of the patient's teeth is obtained which includes the orthoedra and the anchors. This model of the teeth is equivalent to the negative of the yokes and yokes that one wishes to obtain.
    4) Stamping of the yoke. On this mold, we proceed to stamp a transparent thermomouldable board from 0.5 to 1.5 millimeters. For this, we use a traditional stamping process based on the use of a pressure machine which adapts the boards of methacrylate, resin, acetates, ceramic, zirconium, etc. on the model by generating the yoke. The thickness is determined by the dental movement to be performed as well as the force to which the screeds are subjected and therefore the force to be transmitted. As a result of this stamping, we obtain a yoke with the positive of the model, the shape of the teeth and the orthoedron with the light section of each yoke.
    5) Opening sections and obtaining the alignment device. In this point, we proceed to the opening of the orthoedrons on both sides by creating an open section of the preform joined to the tooth. The opening can be made with burs and a micromotor or by inserting a hot rectangular arc. Thereafter, a round or circular section arc is passed through each opening made in the orthohedra of each yoke, interconnecting all the yokes and supporting them with an elastic ligature.
    A variant of the previous process consists in adding a step of virtual manufacture of screeds after the step
    2.d In this case, after having virtually designed the copings with their components on the basis of the work carried out on the virtual toothing, it is given a volume and the coping is virtually reproduced with a thickness of between 0.5 and 1.5 millimeters. In this way, we obtain a file (step 2.e) with the digital data of the yoke with the incoming part for anchoring and orthoedric projection. This file makes it possible to manufacture the screed according to the patient's request (acrylic, ceramic or zirconium), by allowing it to be produced later through a 3D type printer using the desired material and combining the desired aesthetic characteristics. With this variant, the steps of printing the toothing as well as stamping the copings on its printed toothing are eliminated.
    The device that is obtained is a device or apparatus which generates dental movements from individual yokes of each tooth where each yoke has a projection of square or rectangular section corresponding to an orthoedron. Due to the fact that the yokes are interconnected with a flexible arc passing through the opening of the resulting orthoedra of the creations during virtualization, we simulate the same messages as generate the traditional brackets, producing the same movements on the teeth but without using the glued brackets teeth.
    This device is removable and more aesthetic than the direct use of brackets, because it is based on the use of transparent copings which, taking the entire clinical crown, allow the forces of the flexible arcs to be transmitted without having to stick brackets. In this way, the device is more hygienic, convenient and aesthetic.
    With this manufacturing process, we improve the solution described in document 2 382 967 for removable brackets because by using the process based on the virtualization of the patient's teeth, we avoid using brackets as part of this connection between the arch and the yoke. With this process, a modified model of the patient is generated virtually with all the virtual components incorporated so that once the prototype has been generated, a yoke can be generated which reproduces these components transparently, thus avoiding the use of brackets.
    The advantage of this manufacturing process is to obtain computer files containing the information on the teeth and the negative for the production of the screeds with its shoulders. With these files, we can easily retrieve the information to make a complete device in case of loss, only one of the yokes in case of partial failure of the device.
    Another variant in the device manufacturing process consists in limiting the production of the yokes by including a line indicative of the virtual horizontal plane corresponding to the location of the orthoedra. In this case, the process is the same, excluding the process of selecting orthoedra and including them in the virtualization step of the teeth. That is to say, in this step we will define the horizontal plane and if necessary we will mark the places where we must adhere the brackets. In the printing step, the horizontal plane will be shown by a line on the teeth as a negative as well as the points on which the brackets must be adhered. During the screed stamping process
    CH 709 323 B1 we will show the line and the corresponding place where to adhere the brackets with a discreet mark but visible by the expert. A variant of this manufacturing process is the production of virtual screeds. From this variant, we can virtually design a prototype of the screeds from the virtual model. The virtual screeds will serve as a model for subsequently printing the screeds and are stored in a digital data file. From this moment, the practitioner, using the cutting line mark that the screeds contain, proceeds to glue the brackets in the desired position. This process is more economical but artisanal.
    Brief description of the drawings For a better understanding, the following figures are presented:
    Fig. 1 Fig. 2
    Fig. 3 Figs. 4 and 5 Fig. 6 Figs. 7 and 8
    Figs. 9, 10 and 11 Fig. 12 Fig. 13
    Figs. 14 and 15 shows a flow diagram of the process for manufacturing a dental alignment device.
    shows the positioning of virtual orthoedra with respect to the equilibrium line based on the virtual section line.
    shows a profile view of a screed resulting from the manufacturing process.
    are two views of virtual orthoedrons used in the coping process, shows a view of a tornado-like anchor on a tooth.
    show a perspective view of a tornado type anchor with clockwise rotation and counterclockwise rotation.
    show a view of the vertical anchor plan and profile.
    shows the resulting alignment device.
    shows a virtual toothing on which the practitioner has set up virtual orthoedra according to the positioning line and the spheres to achieve a depression on the yokes, show two yokes with the cutting line in opposite positions.
    Detailed description of an implementation of the invention In fig. 1 we show the virtual toothing (1) obtained from the scan performed on the patient's dentition model, which consists of a set of digital data, and we show it on a computer graphics program. In the first visualization step (37), we have access to a virtual library (2) of virtual orthoedra (4) of different dimensions and another library (3) with virtual anchors (5) of different dimensions and geometries. By choosing an orthoedron (4) and a virtual anchor (5), we can modify its dimensions to adapt it to the virtual tooth of the virtual toothing (1). On the image of the virtual toothing (1) the practitioner proceeds to choose and represent the horizontal virtual plane (6), step (38). The establishment of the plan produces a line (7) of cut with the virtual toothing. This section line will indicate the height over which the virtual orthoedra (4) chosen in the library (2) are set up and, if necessary, its geometry is modified. The positioning of the plane and the generation of the cutting line (7) also serve to show the height on which the brackets (32) are to be mounted. Once the virtual orthoedra (4) have been set up, the practitioner manipulates the positioning and final dimensions of the orthoedra (4) using the program until the desired result is obtained. In this case, the aim is for the arc (16) to exert a force on the virtual orthoedron so that it generates a force and a determined movement message on the tooth (20). Through virtualization, we can set up the different virtual orthoedra (4) and make the corresponding tests to choose the best combination and in this way improve the effect that the real arch (16) will exert later on the tooth ( 20) by acting through the orthoedric projections (13) of the yokes (12). In this step (37), the vestibular placement of the virtual orthoedra (4) is shown, which can also be lingual.
    The practitioner will virtually balance the forces exerted by the arc (16) on each of the real teeth (20) using a virtual view of the positioning of the virtual orthoedra (4) relative to the line of virtual section (7) corresponding to that of equilibrium as shown in fig. 2. This process can also be applied to brackets, not shown in the figures. The position of the virtual orthoedra (4) is carried out according to a technique of setting up equilibrium, torques and angulations, to ensure that the forces that the arc will exert are transmitted to the yokes (6) and the teeth (20) in the same way as brackets do.
    To vertically fix the real yokes (12), virtual semi-spherical projections (5) are inserted in the positions of the teeth where, afterwards, the anchors (21, 24 and 27) are manually adhered to. These anchors (21, 24 and 27) are defined by choosing the corresponding anchors from a virtual library and subsequently by modifying their dimensions and geometry to adapt them to each tooth and screed. We have not shown this library or the definition of anchors with figures.
    CH 709 323 B1 [0033] FIG. 13 shows the final virtual result where the virtual toothing (8) comprises virtual orthoedra (4) along the cutting line (7) and spheres (5) to produce a depression on the yokes.
    As a result of the virtual process, a computer file is obtained, step (39), with the geometric characteristics of the virtual toothing (8), including the section line (7), a set of virtual orthoedra (4) of different dimensions which are linked to the toothing (8) and virtual semi-spheres (5) for the future control of the yokes (12). This file (39) is printed with a 3D type printer, printing step (40), by obtaining a model of the teeth or printed dentition (9) of the patient including protrusions in the form of orthoedra (10) and protrusions semi-spherical (11). On this printed toothing (9) a stamping process is carried out, stamping step (41), in order to obtain the final caps (12) with the shape of the teeth and comprising orthoedric projections (13) and recesses (14). to accommodate the closure of the anchors (21, 24 and 27). On the orthohedral projections (13), the corresponding hollow is produced with cutters and a micromotor or by inserting a hot rectangular arc. Then we move a dental arch (16) with round or circular section for each opening made on the orthoedra of each yoke, interconnecting all the yokes and supporting them by means of an elastic ligature.
    Each yoke (12), fig. 3, has the shape of the tooth (20) obtained after the manufacturing process. On its vestibular or lingual part, it has a projection having the shape of an orthoedron (13), as well as a slot (14) making it possible to fit the clevis (12) on an anchor (21, 24 and 27) adhered to the tooth (20) to which the yoke (12) is coupled. The position of each slot (14) is defined in the virtualization process as shown in fig. 1.
    The virtual orthoedra (4), fig. 4 and 5 have a wider prismatic base (17) on which the rectangular prism (18) rests, the dimensions of which are determined by the practitioner as a function of the force, including its direction and its direction, which the arc must exert (16) on each tooth (20). By printing the yokes (12) these orthohedra produce the corresponding projection (13) on the yoke (12) forming a single body, as shown in fig. 3.
    The practitioner manually adheres the anchors (21, 24 and 27) to the teeth (20) in the position previously determined to make the recess on the yokes (12). In this way, in fig. 6 shows a tornado type anchor (21) adhered to the lingual part of a tooth (20). As shown in fig. 7 and 8, this type of anchor (21, 24) of the "tornado" type consists of a rectangular figure from which emerge bevels (22,25) or inclined projections oriented with a certain tangency with respect to a semi elliptical section sphere (23, 26) located on the central part thereof and collecting each of these projections (22, 25) in a determined direction by forming a rotation. The elevation of the projections (22, 25) in its path towards the semi-sphere (23, 26) together with its orientation will exert the closing mechanism of each anchor (21,24) with the yokes (12) to achieve the corresponding anchor. In fig. 7, the case of an anchor (21) is shown with projections with clockwise rotation while in FIG. 8 shows an anchor (24) with projections (25) counterclockwise.
    The vertical type closure (27), fig. 9 to 11, consists of
    - a truncated sphere (8) on the upper part which is joined to the cervical area of the tooth so that the yoke (12) does not remain attached. The sphere protrudes from the upper part of this closure to protect the tongue from possible injuries that may occur due to the contact of the latter with this closure.
    - an external vertical rectangular orthoedron (29) and a horizontal rectangular orthoedron (30) created by the attachment flap with the yoke to the tooth.
    - a flattened cylinder (31) in the form of a pellet which is glued to the tooth (20). The diameter of this cylinder (31) is greater than the length of the vertical orthoedron (29) to protect the tissues of the mouth.
    The manufacturing of the closures is carried out by means of a stamping process from the computer files which represent the closures and which have been defined in the steps (33 and 34).
    [0040] FIG. 12 shows the final result of this process, which consists of a set of yokes (12) which conform a device for correcting the position of the teeth using a bow (16). The independent yokes (12) can fit in a single tooth (20) or in a set of these. Each of the yokes (12) has a bracket (32) or a protrusion in the form of a perforated orthoedron (13) which is crossed by an arc (16) which exerts a force on the orthoedric projection (13), which is transmitted to the clevis (12) through the orthoedron. For that, according to the direction and the direction of the force which one wishes to exert on the tooth, the orthoèdre will have a shape and dimensions determined.
    [0041] FIG. 14 shows the variant corresponding to a printed toothing (33) comprising a straight projection (34) corresponding to a cutting line (7). This toothing (33) differs from the toothing (9) in that it does not include the orthoedric projections (10). The yokes (34), fig. 15 and 16, which are obtained by stamping this toothing (33) will comprise only a corresponding projecting shoulder (35) which indicates to the expert the height where the brackets or orthoedra can be adhered manually as well as obviously (14) to house the anchors (21, 24 and 27).
    Industrial application This invention is applicable in the industry related to the health sciences, in particular the orthodontics sector.
    CH 709 323 B1
    权利要求:
    Claims (17)
    [1]
    claims
    1. A removable dental alignment device comprising a set of independent yokes (12, 35) and tooth anchors (21, 24, 27) (20); each yoke (12, 35) having a geometry substantially equal to that of a tooth to be covered (20); characterized in that in its inner part, each yoke (12, 35) comprises a slot (14) for coupling to one of said tooth anchors (21, 24, 27) and at least one bracket (32) or orthoedron (13) intended to facilitate the passage of a dental arch (16) of circular, square or rectangular section.
    [2]
    2. removable dental alignment device according to claim 1, characterized in that each yoke (12) comprises an orthoedron (13) comprising a prismatic base (17) of greater width than a rectangular prism (18) perforated which rests on the prismatic base (17), so that through the perforated rectangular prism (18) passes the dental arch (16).
    [3]
    3. removable dental alignment device according to claim 1, characterized in that the yokes (35) have a right shoulder (36) corresponding to the cutting line (7) on which are adhered brackets (32) or orthoedra (13).
    [4]
    4. removable dental alignment device according to claim 2 or 3, characterized in that one of said anchors is of vertical type (27), that it is adapted to be fixed to a tooth, and consists of:
    - a truncated sphere (28) which protrudes and the upper part of which is intended to unite with the cervical area of the tooth (20);
    - a hanging flap formed by an external vertical rectangular orthoedron (29) and a horizontal rectangular orthoedron (30);
    - a flattened protective cylinder (31), adapted to be glued to the tooth (20), the diameter of which is greater than the length of the vertical orthoedron (29).
    [5]
    5. removable dental alignment device according to claim 2 or 3, characterized in that the anchor (21, 24) is fixed to the tooth and consists of a rectangular figure of the vertices from which protrusions (22, 25) inclined and oriented with a certain tangency with respect to a semi-sphere with elliptical section (23, 26) located on the central part thereof and which collects each of these projections (22, 25).
    [6]
    6. removable dental alignment device according to claim 2, characterized in that the orthoedra (13) are located on the vestibular part of the yokes (12).
    [7]
    7. A removable dental alignment device according to claim 2, characterized in that the orthoedra (13) are located in the lingual part of the yokes (12).
    [8]
    8. Method for manufacturing a removable dental alignment device as defined in claim 1, produced from a mold of the patient's teeth, characterized in that it comprises the following steps:
    - digitization of the denture mold and virtual representation of a scanned virtual dentition (1) through a set of digital data,
    - obtaining a final virtual toothing (8) from the scanned virtual toothing (1) in which:
    at. representation of a virtual horizontal plane (6) which cuts the scanned virtual toothing (1) on a cutting line (7),
    b. input of virtual orthoedra (4) into a virtual orthodohedron library (2),
    vs. placement on the cutting line (7) of the chosen virtual orthoedra (4) and modification of their dimensions as a function of the movement to be exerted on each tooth, and according to the technique of placing balance, couples and angulations, using the virtual view of the positioning of the virtual orthoedra (4) relative to the virtual section line (7),
    d. modification of virtual semi-spheres (5) representative of virtual anchors of different dimensions and geometries of a library of virtual anchors (3),
    e. placement of virtual semi-spheres (5) on the scanned virtual toothing (1),
    f. obtaining a computer file with the geometric characteristics of the final virtual toothing (8), the section line (7), all of the virtual orthoedra (10) of different dimensions and semi-spherical projections (11),
    - printing with a 3D printer the model of the teeth or dentition printed (9) of the patient with the virtual orthoedra (10) and the semi-spheres (11),
    - stamping the yokes (12) on the printed toothing (9) comprising the shape of the teeth, the orthoedra (13) and of the recesses (14),
    - opening on the orthodhedra (13) of the dental arch passage cavity (16) using specific cutters and micromotor or by inserting a hot rectangular arc.
    [9]
    9. A method of manufacturing a removable dental alignment device according to claim 8, characterized by the positioning of the orthoedra (13) on the vestibular part of the cutting line (7) and the semi-spheres (5) on the lingual part of the scanned virtual toothing (1).
    [10]
    10. A method of manufacturing a removable dental alignment device according to claim 8, characterized by the positioning of the orthoedra (13) on the lingual part of the cutting line (7) and the semi-spheres (5) on the vestibular part of the scanned virtual toothing (1).
    CH 709 323 B1
    [11]
    11. Method for manufacturing a removable dental alignment device according to claim 8, characterized in that on the virtual representation of the patient's teeth:
    at. we choose and represent a horizontal virtual plane (6) which cuts the scanned virtual toothing (1) on a cutting line (7),
    b. we choose and modify the virtual semi-spheres (5) of a library of virtual anchors (3),
    vs. the virtual semi-spheres (5) are placed on the scanned virtual toothing (1), and in that one obtains a computer file with the geometric characteristics of the virtual toothing (8), the cutting line (7 ), and the semi-spherical projections (11) and a 3D type printing of the printed toothing (33) of the patient is carried out with a shoulder (34) on which the stamping of the caps (35) comprising a shoulder ( 36) corresponding to the cutting line (7), and in that one adheres manually, on the shoulder (36) of each yoke, the brackets (32) or orthoedric projections.
    [12]
    12. A method of manufacturing a removable dental alignment device according to claim 11, characterized by the printing of the cutting line (7) on the lingual part and the semi-spheres (5) on the vestibular part.
    [13]
    13. A method of manufacturing a removable dental alignment device according to claim 11, characterized by the printing of the cutting line (7) on the vestibular part and the semi-spheres (5) on the lingual part.
    [14]
    14. A method of manufacturing a removable dental alignment device according to claim 8, characterized in that after obtaining the digital file with the data of the final virtual toothing (8), the copings are virtually reproduced on the final virtual toothing (8) with a volume between 0.5 and 1.5 millimeters by obtaining a file with the digital data of the yoke including the incoming part for anchoring and the orthoedric projection and in that this file is printed using 3D printing technology.
    [15]
    15. A method of manufacturing a removable dental alignment device according to claim 14, characterized in that the 3D printing of the screeds is made of acrylic, ceramic or zirconium.
    [16]
    16. Method for manufacturing a removable dental alignment device according to claims 8, 11 and 14, characterized by:
    -the definition and adaptation of each anchor on the scanned virtual toothing (1) from a virtual library of anchors,
    - obtaining a computer file with the digital data of the anchor,
    - the printing of the digital file with a 3D printing process by obtaining the final anchors (21, 24 and 27).
    [17]
    17. A method of manufacturing a removable dental alignment device according to claims 8 and 11, characterized in that the stamping of the yoke (12, 35) is carried out using a thermo-moldable board between 0.5 and 1, 5 millimeters.
    CH 709 323 B1
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    同族专利:
    公开号 | 公开日
    HK1209013A1|2016-03-24|
    CA2893805A1|2014-07-10|
    US20180206942A1|2018-07-26|
    AU2013371950B2|2017-10-12|
    NZ738712A|2019-02-22|
    EP2942030A4|2017-01-18|
    CN104883995A|2015-09-02|
    PH12015501332A1|2015-09-02|
    CL2015001664A1|2015-11-20|
    PH12015501332B1|2015-09-02|
    US10524882B2|2020-01-07|
    US9993315B2|2018-06-12|
    KR101968064B1|2019-08-19|
    JP6179603B2|2017-08-16|
    KR20150103360A|2015-09-10|
    EP2942030A1|2015-11-11|
    MX360618B|2018-11-12|
    BR112015014799A2|2017-07-11|
    NZ708797A|2018-07-27|
    CA2893805C|2018-05-22|
    JP2016503681A|2016-02-08|
    US20150335399A1|2015-11-26|
    CN104883995B|2018-06-19|
    KR20180107310A|2018-10-01|
    WO2014106676A1|2014-07-10|
    BR112015014799B1|2020-09-29|
    SG11201504702XA|2015-07-30|
    MX2015008197A|2015-09-25|
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    法律状态:
    2018-03-29| PK| Correction|Free format text: RECTIFICATION INVENTEUR |
    优先权:
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    PCT/ES2013/000003|WO2014106676A1|2013-01-02|2013-01-02|Removable lingual-vestibular dental alignment device and method for the production thereof|
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