WO2022205761A1

WO2022205761A1 - Dental instrument, casing-like orthodontic appliance and manufacturing method therefor

Info

Publication number: WO2022205761A1
Application number: PCT/CN2021/115408
Authority: WO
Inventors: 赵晓磊; 姚峻峰
Original assignee: 正雅齿科科技(上海)有限公司
Priority date: 2021-04-01
Filing date: 2021-08-30
Publication date: 2022-10-06

Abstract

A dental instrument (100), a casing-like orthodontic appliance (102), and a fabrication method for the casing-like orthodontic appliance (102). The dental instrument (100) comprises an orthodontic fixture (101) and the casing-like orthodontic appliance (102), and the casing-like orthodontic appliance (102) comprises sub-casings (103, 104) and a connection part used for connecting the sub-casings (103, 104) at two adjacent sides of teeth (900) on which the orthodontic fixture (101) is mounted. The connecting part comprises a connecting body (105), and the connecting part only has a connecting function, is not in contact with the orthodontic fixture (101), and will not exert force on the teeth (900) at a corresponding position, so that said part of the teeth may be corrected only by an orthodontic bracket (101a) and an arch wire (101b). There is a single orthodontic force, which reduces the design difficulty of an orthodontic plan, and improves the accuracy of orthodontic treatment, thereby ensuring that the orthodontic effect is consistent with the orthodontic plan. In addition, the casing-like orthodontic appliance (102) also has the characteristics of being easy to take off and wear, and easy to manufacture, and has a long service life.

Description

Dental instrument, shell-shaped aligner and method of making the same

CROSS-REFERENCE TO RELATED APPLICATIONS

This application claims the benefit of priority to Chinese patent applications 202110355135.X and 202120668069.7 filed on April 1, 2021, the entire contents of which are incorporated herein by reference.

technical field

The present application relates to the technical field of orthodontics, and in particular, to a dental appliance used in combination with fixed orthodontics and invisible orthodontics, a shell-shaped orthodontic device suitable for the combination of fixed orthodontics and invisible orthodontics, and a manufacturing method thereof.

Background technique

Orthodontics is usually the repositioning of a patient's teeth into a desired arrangement to correct malalignment and/or malocclusion, maintaining the physiological function of the teeth while improving aesthetics. The traditional orthodontic method is to install braces on all the teeth of the patient. The braces mainly include brackets and arch wires. During the treatment, the base of the brackets is connected to the surface of the teeth with adhesive, and the arch wires are installed on the brackets. In the groove of the groove, the corrective force is provided by the elastic force generated by the deformation of the arch wire, which exerts a continuous corrective force on the tooth and gradually moves the tooth to the desired tooth position. The braces are removed after the teeth have reached their final position after a series of clinical inspections and adjustments made by the doctor over a period of time.

In addition to traditional braces (also known as fixed orthodontics), invisible orthodontic techniques using shell-like appliances have gradually developed in recent years, compared to traditional orthodontics using braces (brackets, arch wires). method, invisible correction has the characteristics of more beautiful and comfortable. However, in some cases, such as severely crowded dentition, twisted teeth or closed extraction space, the shell-like appliance may require a longer period of orthodontic treatment to achieve the corrective effect due to the less force provided by the shell-like appliance. Since the arch wire used in fixed correction can provide enough correction force, the introduction of fixed correction on the basis of invisible correction can make up for the deficiency of invisible correction in complex cases and expand the application scope of invisible correction.

In the prior art, when invisible orthodontics are used in conjunction with traditional braces, the shell-shaped orthodontic device wraps the teeth on which the brackets are installed, so that the teeth are simultaneously subjected to the orthodontic force provided by the brackets and the shell-shaped orthodontic device. The superposition of the teeth greatly increases the complexity of the force on the teeth, and the orthodontic effect brought by it is difficult to control. On the one hand, it will increase the difficulty of the design of the orthodontic plan, and on the other hand, the accuracy of the orthodontic treatment cannot be guaranteed. As the orthodontic treatment progresses, the orthodontic plan There may be deviations in each step in the process, and the accumulation of deviations will eventually lead to the situation that the treatment plan cannot be continued and restarted, and even the treatment failure may occur in severe cases.

SUMMARY OF THE INVENTION

The main purpose of the present application is to provide a dental appliance, a shell-shaped aligner and a manufacturing method thereof based on the technical problems existing in the prior art, so as to avoid the joint application of orthodontic force to teeth by invisible orthodontic and fixed orthodontics, thereby reducing the cost of orthodontic treatment. Design difficulty to ensure that the correction effect is consistent with the correction plan.

Some embodiments of the present application provide a dental instrument, which includes:

An orthodontic fixture for repositioning the teeth on which the orthodontic fixture is installed, including two or more brackets fixed on different teeth and fasteners installed on the brackets;

A shell-shaped orthosis, the shell-shaped orthosis includes a shell, the shell includes at least two sub-shells and a connecting part connecting the sub-shells; each of the sub-shells includes one or more sub-shells that can accommodate a cavity of a tooth, at least a portion of which is designed to relocate a tooth it accommodates without an orthodontic fixture installed;

Wherein, the orthodontic fixture is installed on at least part of the teeth between the adjacent sub-shells, and the connecting portion connects the adjacent sub-shells; During the process of gnawing and after wearing, the connecting part is not in contact with the orthodontic fixture; in the process of using the dental device, the connecting part is not in contact with the teeth located between the adjacent sub-shells. generating force.

Further, during use of the dental appliance, the connecting portion does not contact the teeth located between the adjacent sub-housings.

Preferably, in the dental appliance, during use of the dental appliance, the connecting portion is in contact with the teeth located between the adjacent sub-housings but does not generate force.

Further, the connecting portion and the orthodontic fixture are arranged on the same side or different sides of the teeth in the buccolingual or labiolingual direction.

Further, when the connection part and the orthodontic fixture are arranged on the same side of the tooth, the connection part is not provided with any solid structure under the orthodontic fixture.

Further, the bracket is installed on the labial side of the teeth in the anterior region, and the connecting portion includes a lingual side portion and does not contain a labial side portion.

Further, the bracket is installed on the buccal side of the teeth in the posterior region, and the connecting portion includes a lingual side part and/or an occlusal surface part, and does not contain a buccal side part.

Further, the bracket is installed on the lingual side of the teeth in the anterior region, and the connecting portion includes a labial side portion and does not contain a lingual side portion.

Further, the bracket is installed on the lingual side of the teeth in the posterior region, and the connecting portion includes a buccal side part and/or an occlusal surface, and does not contain a lingual side part.

Further, the connecting portion includes a labial/buccal side portion and a lingual side portion, wherein the connecting portion is only disposed above the orthodontic fixture on the side on which the orthodontic fixture is installed.

Further, the connecting part includes a lip/buccal side part, an occlusal surface part and a lingual side part, wherein the connecting part is only arranged above the orthodontic fixing device on the side on which the orthodontic fixing device is installed. and/or both sides.

Further, the connecting portion includes one or more connecting bodies, and the connecting bodies connect the adjacent sub-shells.

Further, the connecting portion includes a plurality of connecting bodies, and at least two of the connecting bodies are located on the same or different surfaces of the labial/buccal side, the lingual side, and the occlusal surface.

Further, the connecting body is located on the lip/buccal side or the lingual side, and the width of the part of the connecting body corresponding to the orthodontic fixture in the gingival-jaw direction is less than or equal to the corresponding crown of the tooth on which the orthodontic fixture is installed. high.

Further, the connecting body is located on the lip/buccal side, and the minimum distance between the connecting body and the outer surface of the tooth on which the orthodontic fixture is installed is greater than or equal to 0.

Further, the connecting body is located on the lingual side, and the minimum distance between the connecting body and the inner surface of the tooth on which the orthodontic fixture is installed is greater than or equal to 0.

Further, the connecting body is located on the occlusal surface, and the width of the part of the connecting body corresponding to the orthodontic fixture in the buccal-lingual direction is less than or equal to the width of the occlusal surface of the corresponding tooth on which the orthodontic fixture is installed.

Further, the shape of the connecting body is substantially consistent with the occlusal surface of the corresponding tooth on which the orthodontic fixture is installed.

Further, the minimum distance between the connecting body and the highest point of the crown of the tooth on which the orthodontic fixture is installed is greater than or equal to 0.

Some embodiments of the present application also provide a shell-shaped orthodontic appliance for use in the above-mentioned dental instrument, the shell-shaped orthodontic appliance includes a housing, and the housing includes at least two sub-housings and a connection connecting the sub-housings. a connecting portion; each of the sub-housings includes one or more cavities capable of accommodating teeth, at least a portion of the cavities are designed to reposition the accommodated teeth without orthodontic fixtures installed;

The connecting portion connects the adjacent sub-shells; during and after the shell-shaped dental appliance is worn to the jaw, the connecting portion does not contact the orthodontic fixture; During the use of the shell-shaped appliance, the connecting portion and the teeth located between the adjacent sub-shells do not generate force.

Some embodiments of the present application also provide a method for manufacturing the above-mentioned shell-shaped corrector. The manufacturing method adopts a process of hot-pressing film forming to manufacture the shell-shaped corrector, including the following steps:

S1. Acquisition of the initial dental model: obtain the digital dental model of any orthodontic step in the orthodontic plan as the initial dental model;

Any orthodontic step in the orthodontic plan is implemented by using an orthodontic fixture in cooperation with the shell-shaped fixture, and the orthodontic fixture is used to reposition the teeth on which the orthodontic fixture is installed, including fixing on different teeth more than two brackets and fasteners mounted on said brackets;

S2. Design of the digital jaw model: According to the design of the connection part in the shell-shaped appliance, a preset connection part model is designed on the teeth in the initial jaw model on which the orthodontic fixture is installed, to obtain Digital dental model including preset connector model;

S3. Manufacture of a solid dental model: based on the digital dental model including the preset connecting part model, a solid dental model including a preset connecting part is produced by using an additive manufacturing process;

S4. Hot-pressed film: hot-pressed film on the solid dental model to obtain a shell-shaped orthosis including a preset connection part;

S5. Cutting: cutting and removing excess parts along the gum line or adjacent to the gum line on the shell-shaped appliance including the preset connecting part, and cutting and removing the part corresponding to the teeth on which the orthodontic fixture is installed, cutting The latter shell-shaped orthodontic device includes at least two sub-shells, and the preset connecting parts are cut and shaped into connecting parts, so that the connecting parts are connected to the adjacent sub-shells; During and after the fitting of the orthodontic appliance to the jaw, the connecting portion is not in contact with the orthodontic fixture; during the use of the shell-shaped appliance, the connecting portion is in contact with the adjacent sub-shell. The teeth between the body do not produce force.

Further, the step S5 adopts laser cutting or mechanical cutting.

At least one of the following beneficial effects can be brought about by the dental instrument, the shell-shaped orthodontic appliance and the manufacturing method thereof provided by the present application.

1. The shell-shaped aligner is provided with a connecting part at the position corresponding to the tooth where the bracket is installed. The connecting part is mainly to realize the connection effect, and will not exert force on the teeth in the corresponding position, so that this part of the teeth is only supported by the orthodontic bracket. And arch wire to achieve correction, the correction force is single, which reduces the design difficulty of the correction plan; at the same time, invisible correction and fixed correction are carried out in coordination under the correction plan, which improves the correction accuracy and ensures that the correction effect is consistent with the correction plan.

2. The position design of the connecting part also makes it not in contact with the brackets in the wearing state and the process of removing and wearing, making it more convenient to take off and put on, and the connecting part is free from force and not easy to be damaged during the taking off and wearing process.

3. The connection part is made by designing a preset connection part model on the dental jaw model, and then using a hot-pressed film to obtain a shell-shaped orthodontic device with a preset connection part, and the connection part can be obtained after the preset connection part is cut. The preparation method is simple and easy, and the production efficiency is greatly improved.

Description of drawings

The preferred embodiments will be described below in a clear and easy-to-understand manner with reference to the accompanying drawings, and the above-mentioned characteristics, technical features, advantages and implementations thereof will be further described.

Fig. 1a is a schematic diagram 1 of a dental appliance mounted on a tooth according to an embodiment of the application; Fig. 1b is a schematic structural diagram of a shell-shaped aligner in the dental appliance of Fig. 1a; Schematic diagram of the structure of the orthosis.

Fig. 2a is a schematic diagram 2 of a dental appliance installed and worn on teeth according to another embodiment of the application; Fig. 2b is a schematic structural diagram of a shell-shaped aligner in the dental appliance of Fig. 2a; Schematic diagram of the structure of the shell-shaped corrector.

Fig. 3a is a schematic diagram 3 of another embodiment of the application for installing and wearing a dental appliance on a tooth; Fig. 3b is a schematic structural diagram of a shell-shaped aligner in the dental appliance of Fig. 3a; Figs. Schematic diagram of the structure of the shell-shaped orthosis on the side.

Fig. 4a is a schematic diagram 4 of another embodiment of the application of a dental appliance mounted on a tooth; Fig. 4b is a schematic structural diagram of a shell-shaped aligner in the dental appliance of Fig. 4a.

Fig. 5a is a schematic diagram 5 of yet another dental appliance installed and worn on the teeth provided by the application, wherein the orthodontic fixture is arranged on the lingual side of the teeth in the posterior teeth area.

Fig. 5b is a schematic diagram 6 of another embodiment of the present application of the dental appliance being installed and worn on the teeth, wherein the orthodontic fixture is arranged on the labial side of the teeth in the anterior teeth area.

FIG. 6 is a seventh schematic diagram of another embodiment of the application of a dental appliance mounted on a tooth, wherein two groups of orthodontic fixtures are provided.

FIG. 7 is a schematic structural diagram of a digital dental model designed in a method for manufacturing a shell-shaped appliance according to an embodiment of the present application.

8 is a schematic diagram of a shell-shaped appliance according to an embodiment of the present application, wherein the shape of the connecting portion is substantially the same as the occlusal surface of the tooth on which the orthodontic fixture is installed.

Detailed ways

The present application provides a dental appliance, which can realize the cooperative use of an orthodontic fixture and a shell-shaped appliance, so that the forces exerted by the shell-shaped appliance and the orthodontic appliance on teeth do not affect each other, and under the corresponding set treatment plan The entire dentition can be orthodontically coordinated, and the orthodontic process, orthodontic cycle, and orthodontic effect are more in line with the orthodontic plan. In addition, it can be conveniently worn and removed, the number of times of contact between the shell-shaped orthodontic appliance and the orthodontic fixture is reduced, and the service life of the shell-shaped orthodontic appliance can be prolonged. The present application also provides a shell-shaped orthodontic appliance and a manufacturing method thereof. The shell-shaped orthodontic appliance is suitable for use in conjunction with an orthodontic fixture, and can be consistent with the correction progress of the orthodontic fixture under a set corresponding correction plan. And it is easy to wear, and the production method is simple.

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the specific embodiments of the present application will be described below with reference to the accompanying drawings. Obviously, the drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, other drawings can also be obtained from these drawings without creative efforts, and obtain other implementations.

An embodiment of the present application provides a dental appliance, comprising:

Usually, the orthodontic treatment of teeth requires a doctor to design an orthodontic plan for the patient, that is, the patient's teeth are moved from the initial position to the final position in multiple orthodontic steps in a clinically and biologically reasonable manner. The movement of a single tooth in each orthodontic step is based on The plan is to design the corresponding amount of movement, so that the movement of all teeth within the treatment plan is coordinated. The above-mentioned dental appliance provided in the present application can be used in any orthodontic treatment step in the orthodontic plan that adopts the cooperation of the orthodontic fixture and the shell-shaped aligner. Fixed correction and invisible correction can be carried out independently under the corresponding correction plan, which ensures high correction accuracy.

In the above-mentioned dental instruments of the present application, one or more groups of orthodontic fixtures may be provided, and each group of orthodontic fixtures is used to correct a group of teeth. In the same group of orthodontic fixtures, a plurality of brackets ( Multiple brackets can be two or more) are usually placed separately on adjacent teeth in the set of teeth, but if some of the teeth do not fit or do not need brackets, multiple brackets It is possible that the grooves are respectively provided on non-adjacent teeth of the set of teeth. Fasteners usually use arch wires, which are embedded in the grooves of multiple brackets (the multiple brackets can be two or more) of a set of orthodontic fixtures, which deform and tend to return to their original positions. Then, the orthodontic force is generated, and the orthodontic force acts on the teeth through the conduction of the brackets to realize the repositioning of the teeth.

In the above-mentioned dental appliance of the present application, the casing of the shell-shaped orthodontic appliance includes a plurality of sub-casings, and the number of the sub-casings depends on the number of orthodontic fixtures. If a set of orthodontic fixtures is provided, the casing needs to be provided with One connecting part usually includes two sub-housings, and if two sets of orthodontic fixtures are provided, the housing needs to be provided with two connecting parts, then the shell-like orthodontic device includes three sub-housings, and so on. The application does not specifically limit the number of orthodontic fixtures and sub-housings, which can be set according to actual orthodontic needs.

In the above-mentioned dental appliance of the present application, the function of the connecting portion of the casing of the shell-shaped appliance is to connect the plurality of sub-casings into a whole, and its position corresponds to the tooth on which the orthodontic fixture is installed. It can be said that a set of The teeth on which the orthodontic fixture is installed are located between the adjacent sub-shells on both sides of the tooth. During and after the shell-shaped dental appliance is fitted to the jaw, the connecting portion does not contact the orthodontic fixture (usually brackets and arch wires).

In the above-mentioned dental appliance of the present application, each sub-housing of the housing of the shell-like appliance has one or more cavities capable of accommodating teeth, usually and preferably, each sub-housing has a plurality of cavities capable of accommodating teeth Due to the different designs of different steps of the treatment plan, the cavity at a certain position may only have the accommodating function in some treatment steps, while in another treatment step, it may have both the accommodating and repositioning functions. Therefore, in a certain treatment step In an orthodontic step, all the cavities may be used, or only a part of the cavities may have the function of repositioning the teeth. The cavity accommodates the teeth without brackets, and therefore, the repositioning of these teeth is achieved by the repositioning effect of the cavity.

Among the dental appliances of the present application, orthodontic fixtures are usually suitable for complex and difficult orthodontic correction, such as the case of severely crowded dentition. On the one hand, it is difficult to remove the shell-shaped aligner, and on the other hand, the shell-shaped aligner is prone to breakage. The same situation may also occur in the case of tooth torsion; for example, in the case of tooth extraction, a large gap will be left after tooth extraction. , The use of orthodontic fixtures can speed up the progress of gap closure and shorten the correction cycle, so the combined use of shell-shaped aligners and orthodontic fixtures can just complement each other.

When considering the combined use of fixed bracket orthodontics and invisible orthodontics, the primary problem to be solved is how to design the structure of the part of the shell-shaped aligner corresponding to the teeth where the brackets are set, regardless of whether the brackets are accommodated in In the cavity of the shell-shaped appliance, or anchoring the bracket with the shell-shaped appliance will make the shell-shaped appliance wrap part of the teeth, thereby exerting force on the teeth together with the bracket, which will complicate the force on the teeth. On the one hand, the design of the correction plan is more difficult, and on the other hand, the correction effect during the correction process is uncontrollable, which causes a large deviation from the correction plan, and the deviation will continue to accumulate with the progress of the correction plan. In severe cases, the correction plan needs to be reconstructed. In this way, the correction cycle will be affected, and it will even cause correction failure; in addition, the shell-shaped orthosis will also reduce the convenience of wearing due to the contact with the bracket during the wearing and removal process, and even frequent contact makes Deformation of the shell aligner is more likely to break the shell aligner.

In the structural design of the dental appliance in the present application, only a connecting portion with a connecting function is provided at the position corresponding to the teeth corrected by the orthodontic fixture, and the connecting portion does not have the function of accommodating and wrapping the orthodontic fixture or the teeth, so that in the set Under the corresponding treatment plan, there is no interaction between the teeth with the orthodontic fixture and the shell-shaped aligner, and they can only move under the force of the orthodontic fixture. And the design of the orthodontic steps, while the sub-shell of the shell-shaped aligner still retains the orthodontic force, can reposition the teeth without brackets, and cooperate with the orthodontic fixture to maintain the coordinated orthodontic treatment of the entire dentition, so that the overall The correction effect is closer to the correction plan, and the correction progress is more controllable.

In the dental appliance of the present application, the connecting portion does not contact the orthodontic fixture during and after the shell-like appliance is fitted to the jaw. Wherein, the state after the shell-shaped orthodontic device is worn is the state in which the shell-shaped orthodontic device is fixed on the teeth after the shell-shaped orthodontic device is in place. By reducing the contact between the connection part and the orthodontic fixture, the present application ensures the convenience of removing the shell-shaped orthodontic appliance for patients on the one hand, and avoids the deformation or even breakage of the shell-shaped orthodontic appliance due to excessive contact on the other hand. , extending the service life of the shell-shaped corrector.

"During the use of the dental instrument, the connecting portion and the teeth located between the adjacent sub-shells do not generate force" can be achieved in the following two ways, one is to use the dental instrument During the process, the connecting portion does not contact the teeth located between the adjacent sub-shells, so that there is no force acting point between the connecting portion and the teeth on which the orthodontic fixture is installed, thereby ensuring that The effect of force will not be generated; the other is that during the use of the dental appliance, the connecting portion is in contact with the teeth located between the adjacent sub-shells but does not generate the effect of force, in order to ensure that the connecting portion does not It will cause discomfort to the wearer. In the design, the connecting part may be slightly close to the teeth on which the orthodontic fixture is installed, so that contact occurs between the connecting part and the teeth during use, but the connecting part is designed to ensure that the contact will not be In the case of causing the deformation of the connection part, the effect of no force can be realized.

The shape of the connecting portion is not particularly limited in this application, and the basic principle is that the design is simple and easy to manufacture. Specifically, based on the preferred design principle of the connecting portion, the above-mentioned “during the process of wearing the shell-shaped dental appliance to the jaws and after wearing, the connecting portion does not contact the orthodontic fixture”, At the same time, "during the use of the dental instrument, the connecting portion does not generate force with the teeth located between the adjacent sub-shells", the structural design of the connecting portion is preferably: the connecting portion and the The orthodontic fixture is arranged on the same side or different sides of the teeth in the buccolingual or labiolingual direction; when the connecting part and the orthodontic fixture are arranged on the same side of the tooth, the connecting part is on the orthodontic side. There is no solid structure under the fixture. For example, if the bracket is installed on the labial side of the teeth in the anterior region, the connecting part includes the lingual side part and does not contain the labial side part; or, if the bracket is installed in the posterior region The buccal side of the tooth, the connecting portion comprising the lingual portion and/or the occlusal portion, but not the buccal portion; or, if the bracket is mounted on the lingual side of the tooth in the anterior region, the connecting portion includes the labial portion A lateral portion, without a lingual portion; or, if the bracket is mounted on the lingual portion of a tooth in the posterior region, the connecting portion includes a buccal portion and/or an occlusal portion, and does not include a lingual portion; or, The connecting part includes a lip/buccal side part and a lingual side part, wherein the connecting part is only arranged above the orthodontic fixing device on the side on which the orthodontic fixing device is installed; or, the connecting part is It includes a lip/buccal side part, an occlusal surface part and a lingual side part, wherein the connecting part is only arranged above and/or on both sides of the orthodontic fixture on the side on which the orthodontic fixture is installed.

The terms "anterior area" and "posterior area" used in this application are defined according to the classification of teeth in the second edition of "Introduction to Stomatology" published by Peking University Medical Press. "Anterior area" includes incisors, lateral incisors Teeth and canines, "posterior region" includes premolars and molars; the term "labial/buccal" means the labial or buccal, i.e. "/" means "or"; the terms "labial part", "buccal" "Side part", "lingual side part" and "occlusal surface part" respectively represent the parts of the connecting part located on the labial side, buccal side, lingual side, and occlusal surface, which can correspond to the connections shown in each surface in the following embodiments body. The technical solutions in the present application will be explained in more detail below with reference to the accompanying drawings. The drawings here follow a numbering convention, wherein the first number corresponds to the drawing number, and the remaining numbers represent elements or components in the drawings. Similar elements or components between different figures can be identified by the use of similar numerals. For example, 102 may refer to the shell orthosis in Figure 1a, and the shell orthosis may be referred to as 302 in Figure 3a.

Please refer to FIG. 1a , which shows a schematic diagram of a dental appliance 100 of a specific implementation structure of the present application being worn on a patient's teeth 900 . The dental appliance 100 includes an orthodontic fixture 101 and a shell-shaped appliance 102, wherein the orthodontic fixture 101 includes three brackets 101a respectively fixed on different teeth in the posterior teeth region of a patient and connected to the three brackets 101a The archwire 101b, each bracket 101a is mounted on the buccal surface of the tooth. Please refer to FIG. 1b in combination, which shows the specific implementation structure of the shell-shaped orthosis 102 in FIG. 1a, the shell-shaped orthodontic 102 includes a casing, and the casing includes a first sub-casing 103 and a second sub-casing 104, the first sub-housing 103 includes a plurality of cavities, wherein each cavity is designed to accommodate teeth, and all or a part of the cavities are designed to relocate teeth, and the second sub-housing 104 includes a cavity. In Fig. 1b, the first sub-shell 103 and the second sub-shell 104 are connected by a connecting part, the connecting part includes a connecting body 105 on the lingual side, and the connecting body 105 corresponds to the The width of the portion of the orthodontic fixture is smaller than the corresponding crown height of the tooth on which the orthodontic fixture is mounted, and the minimum distance between the connecting body 105 and the inner surface of the tooth on which the orthodontic fixture is mounted is greater than or equal to 0. The gingival-maxillary direction in this application refers to the vertical direction from the gum line to the occlusal surface.

Fig. 1c and Fig. 1d show other specific implementation structures of the shell-shaped orthosis with the connecting portion located on the side of the tongue. The connecting part in Fig. 1c includes a connecting body 106 located on the lingual side and close to the gum line. The width of the connecting body 106 in the gingival-jaw direction corresponding to the orthodontic fixture is smaller than that of the tooth corresponding to the tooth on which the orthodontic fixture is installed. For the crown height, the minimum distance between the connecting body 106 and the inner surface of the tooth on which the orthodontic fixture is installed is greater than or equal to 0. The connecting part in Fig. 1d includes a connecting body 107 located on the lingual side and close to the occlusal surface. The width of the portion of the connecting body 107 corresponding to the orthodontic fixture in the gingival-jaw direction is smaller than the corresponding teeth of the teeth on which the orthodontic fixture is installed. For the crown height, the minimum distance between the connecting body 107 and the inner surface of the tooth on which the orthodontic fixture is installed is greater than or equal to 0.

In the implementation structures shown in FIGS. 1 b , 1 c and 1 d , the connecting portion only includes one connecting body, and the connecting body and the bracket are located on different sides. Specifically, in the above example, the connecting portion is disposed on the lingual side opposite to the bracket mounting surface (the buccal surface of the teeth in the posterior region), so that the shell-shaped appliance will not touch the bracket during the process of wearing or taking it off. Or arch wire, which ensures the convenience of wearing and the integrity of the shell-shaped aligner, and the orthodontic progress of the entire dentition is consistent under the corresponding orthodontic plan, thereby regulating the patient's orthodontic cycle and orthodontic effect. It will be appreciated by those skilled in the art that, on the basis of the above example, if the brackets are mounted on the lingual surface of the posterior teeth, the position of the connecting portion can be shifted accordingly to the opposite buccal position, or if When the bracket is installed on the labial or lingual surface of the teeth in the anterior area, the position of the connecting part is set on the opposite surface of the bracket to ensure that the patient wears and removes the shell-like aligner, as well as the patient wearing the aligner. In this state, the contact between the shell-shaped appliance and the orthodontic fixture is avoided, the convenience of wearing is ensured, and the connecting portion and the teeth located between the adjacent sub-shells do not generate force.

In some embodiments, the connecting portion includes an occlusal surface portion, as shown in Figure 2a. Fig. 2b shows a possible design of the connecting part of the shell-like orthodontic 202 in Fig. 2a, the connecting part comprises a connecting body 205 on the occlusal surface, the connecting body 205 corresponds to the orthodontic body in the buccal-lingual direction The width of the part of the fixture is less than or equal to the width of the corresponding occlusal surface of the tooth on which the orthodontic fixture is mounted, and the minimum distance between the connecting body 205 and the highest point of the crown of the tooth on which the orthodontic fixture is mounted is greater than or equal to 0. In the implementation structure shown in Figure 2b, since only one connecting body is provided on the occlusal surface, no matter the bracket is installed on the buccal or lingual surface of the posterior teeth, it will not be used during the use of the shell-shaped appliance. In addition, the design of the connecting body located on the occlusal surface is less difficult, mainly considering the distance from the teeth at its height position, which is easier to achieve in the production of the corresponding shell-shaped aligners .

Fig. 2c shows another possible design of the connecting part including the occlusal surface part, the connecting part includes the connecting body 206 on the lingual side and the connecting body 207 on the occlusal surface, the shape and position of the connecting body 206 The shape and position of the connecting body 207 are the same as or similar to those of the connecting body 105 described above. The design in Figure 2c is considered from the perspective of ensuring the shell-shaped orthosis as a whole, the larger the connection area between the connecting part and the adjacent sub-shells, the more stable the connection is, and the strength of the connecting part itself is also improved. The shell-shaped corrector is not easily damaged. In the embodiment shown in Fig. 2c, the brackets are arranged on the buccal side of the posterior teeth, and the connecting portion includes a lingual side part and an occlusal surface part, and does not contain a buccal side part. Those skilled in the art can know that, on the basis of the above example, when the bracket is arranged on the lingual side of the teeth in the posterior region, the connecting portion is correspondingly designed to include a buccal side part and an occlusal surface part, and does not contain the lateral part of the tongue.

When the connecting portion includes a plurality of connecting bodies, in addition to the two embodiments that the connecting bodies are located on the lingual side and the occlusal surface and the buccal side and the occlusal surface, for the dental instrument of the present application, the connecting portion may also include a labial / The buccal side part and the lingual side part, wherein the connecting part is provided only above the orthodontic fixture on the side where the orthodontic fixture is provided. See Figures 3a-3d for examples of this.

Fig. 3a is another exemplary structure of the dental appliance of the present application worn on the patient's teeth 900, and Fig. 3b shows the implementation structure of the shell-shaped appliance 302 in Fig. 3a, wherein the connection part of the shell-shaped appliance 302 includes The connecting body 305 arranged on the lingual side and the connecting body 306 arranged on the buccal side close to the occlusal surface; the shape and position of the connecting body 305 are the same or similar to the above-mentioned connecting body 105; the connecting body 306 is in the gingival-jaw direction The width of the portion corresponding to the orthodontic fixture is smaller than the corresponding crown height of the tooth on which the orthodontic fixture is mounted, and the minimum distance between the connecting body 306 and the outer surface of the tooth on which the orthodontic fixture is mounted is greater than or equal to 0.

Figures 3c, 3d show two other possible designs of the connection comprising buccal and lingual parts. The connecting part shown in FIG. 3c includes a connecting body 307 arranged on the lingual side near the gum line and a connecting body 308 arranged on the buccal side near the occlusal surface; the shape and position of the connecting body 207 are the same as the connecting body 106 described above or similar; the shape and position of the connecting body 308 are the same as or similar to the above-mentioned connecting body 306 . The connecting part shown in FIG. 3d includes a connecting body 309 arranged on the lingual side near the occlusal surface and a connecting body 310 arranged on the buccal side near the occlusal surface; the shape and position of the connecting body 309 are the same as the above-mentioned connecting body 107 or similar; the shape and position of the connecting body 310 are the same as or similar to the above-mentioned connecting body 306 .

3b-3d of the above example, the connecting part is designed as a combination of two connecting bodies, which further strengthens the connection between the first sub-shell and the second sub-shell of the shell-shaped orthodontic appliance without contacting the orthodontic fixture. The connection makes the orthodontic progress of the entire dentition consistent under the corresponding orthodontic plan, and then regulates the orthodontic period and orthodontic effect of the teeth. Those skilled in the art can know that, on the basis of the above example, if the bracket is installed on the lingual surface of the tooth, the connecting body on the lingual side should be correspondingly arranged above the bracket to ensure that the patient is in the Avoid contact between the orthodontic appliance and the orthodontic fixture when wearing and removing the aligner, and when the aligner is worn.

In addition to the above two connectors, more connectors can be provided on the basis of the above example, and multiple connectors can be located on the same side or on different sides of the teeth. The preferred design principle is the above-mentioned "in the During and after the shell-shaped dental appliance is put on the jaw, the connecting portion does not contact the orthodontic fixture”, and “during the use of the dental appliance, the connecting portion is in contact with the orthodontic fixture. Teeth between adjacent subshells do not contribute to force".

In the above implementation structure, the connecting portion includes one or both of the labial/buccal side portion, the lingual side portion, and the occlusal surface portion, and the portions of the connecting portion that are located on the same side as the bracket are located at the end of the bracket. above. As an alternative embodiment, the connecting part can also be designed to include a labial/buccal side part, an occlusal surface part and a lingual side part, wherein the connecting part is only provided on the side where the orthodontic fixation device is arranged at the For the upper and/or both sides of the orthodontic fixture, see an example shown in Figs. 4a and 4b. The structure of the shell-like appliance 402 in Fig. 4a is shown in detail in Fig. 4b, wherein the connecting portion 405 includes a buccal side part, an occlusal surface part and a lingual side part, and the above three parts are respectively related to the outer surface, The distance between the occlusal surface and the inner surface is greater than or equal to 0, and the buccal side portion includes the portion located above and on both sides of the orthodontic fixture, excluding the portion located below the orthodontic fixture.

The above example can completely avoid the orthodontic fixation appliance installed on the surface of the teeth, and has a high wearing convenience, so that the orthodontic force of the fixed orthodontic treatment can be better exerted during the correction process. The firmness of the dental instruments enables the dental instruments to be better applied to the corresponding orthodontic plan, and the orthodontic progress of the entire dentition remains consistent under controllable conditions.

All the examples mentioned above are to install the brackets on the buccal surface of the posterior teeth. Those skilled in the art can know that, on the basis of the above examples, if the brackets are installed on the posterior teeth On the lingual surface of the ligament, the connector on the lingual side can be correspondingly shifted to the opposite buccal position, as shown in Figure 5a, the connector 503 is on the buccal side to ensure that the patient wears and removes the shell aligner, and Avoid contact between the shell-shaped aligner and the orthodontic fixture when the aligner is worn.

All the examples mentioned above are to install the brackets on the teeth in the posterior area. Those skilled in the art can know that, on the basis of the above examples, if the brackets are installed on the teeth in the anterior area, Because the occlusal surface of the anterior teeth is narrow, the connecting part usually does not include the occlusal surface part. As shown in Figure 5b, the connecting part 504 is located on the lingual side of the anterior teeth to ensure that the patient wears and removes the shell-like aligner. Avoid contact between the shell-shaped aligner and the orthodontic fixture while wearing the aligner.

In addition, the above embodiments are all cases where one set of orthodontic fixtures are provided, while FIG. 6 shows the case where two groups of orthodontic fixtures are provided. As shown in FIG. 6 , two sets of orthodontic fixtures are provided on the patient's teeth, wherein one set of orthodontic fixtures 601 is located on the three teeth on the left side of the patient, and the other set of orthodontic fixtures 602 is located on the right side of the patient. On the three teeth on the side, the shell-shaped appliance includes three

sub-shells

603, 604, 605, the sub-shell 603 and the sub-shell 604 are connected by the first connecting part 606, and the sub-shell 603 and the sub-shell 605 are connected by a second connection part 607 . Both the first connecting portion 606 and the second connecting portion 607 shown in FIG. 6 include a connecting body located on the lingual side. In an alternative embodiment, the first connecting portion 606 and the second connecting portion 607 can also refer to the aforementioned embodiments. Arrangements or modifications are made on the basis of the foregoing embodiments.

On the basis of the foregoing embodiments, those skilled in the art can easily imagine the shapes and structures of dental instruments including more groups of orthodontic fixtures, which will not be described in detail here.

Based on the same application concept, the present application also provides a shell-shaped orthodontic appliance for use with an orthodontic fixture, which includes a shell including at least two sub-shells and a connection between the sub-shells each said sub-housing includes one or more cavities capable of accommodating teeth, and at least a portion of said cavities are designed to reposition the accommodated teeth without orthodontic fixtures installed;

For the design principles, design ideas and structural design of the shell-shaped orthodontic device described herein, reference may be made to the aforementioned design of the shell-shaped orthodontic device in dental instruments.

The present application also provides a method for manufacturing the above-mentioned shell-shaped corrector. The manufacturing method adopts the process of hot-pressing film forming to manufacture the shell-shaped corrector, including the following steps:

In the above manufacturing method, the step S5 adopts laser cutting or mechanical cutting.

Taking the shell-shaped corrector shown in FIG. 2 b as an example, the manufacturing method of the shell-shaped corrector by using the process of hot pressing film forming includes the following steps:

S1. Obtain the digital dental model of any orthodontic step in the orthodontic plan as the initial dental model, and any orthodontic step in the orthodontic plan is implemented by using a set of orthodontic fixtures and the shell-shaped aligner;

S2. As shown in FIG. 7 , according to the design of the connection part required in the shell-shaped appliance, a preset connection part model 702 is designed on the teeth 701 in which the orthodontic fixture is installed in the initial jaw model, and a preset connection part model 702 is obtained. A digital jaw model 700 of a connection part model is assumed; wherein, the preset connection part model 702 is a convex model, which includes a convex surface located on the occlusal surface, and the convex surface corresponds to the orthodontics in the buccal-lingual direction The width of the part of the fixture is less than or equal to the width of the occlusal surface of the corresponding tooth on which the orthodontic fixture is mounted, and the distance between the convex surface and the highest point of the crown of the tooth 701 on which the orthodontic fixture is mounted is greater than or equal to 0;

S3. the making of the solid dental model: based on the described digital dental model including the preset connection part model, adopt the process of additive manufacturing to produce the solid dental model including the preset connection part;

S5. Cutting: cutting and removing excess parts along the gum line or adjacent to the gum line on the shell-shaped appliance including the preset connecting portion, and installing a correspondingly positive orthodontic device on the shell-shaped appliance including the preset connecting portion. Part of the teeth of the orthodontic appliance is cut and removed, the shell-shaped appliance after cutting includes two sub-shells, and the preset connecting portion is cut to form a connecting portion; the connecting portion connects the adjacent sub-shells case.

In other embodiments, the preset connection part model can be designed according to the tooth surface. In the above step S2, the distance between each point on the convex surface and the point on the occlusal surface of the tooth at the corresponding position is designed. is a preset value greater than 0, the convex surface that is basically consistent with the shape of the occlusal surface can be obtained, and then the connecting portion 804 as shown in FIG. The occlusal surface is basically the same.

In the manufacturing method of the shell-shaped orthodontic appliance described in the present application, the design principle of the preset connecting part model is: to ensure that the connecting part formed after cutting is in the process of wearing the shell-shaped dental appliance to the jaw and after wearing it. It is not in contact with the orthodontic fixture, and at the same time, during the use of the dental appliance, the connecting portion does not generate force with the teeth located between the adjacent sub-shells. For the specific shape of the connecting portion, please refer to The design of the connecting portion on the shell-shaped orthodontic appliance in the aforementioned dental appliance, or the modification is carried out on the basis thereof.

It should be noted that the above embodiments can be freely combined as required. The above are only the preferred embodiments of the present application. It should be pointed out that for those skilled in the art, without departing from the principles of the present application, several improvements and modifications can also be made. It should be regarded as the protection scope of this application.

Claims

A dental appliance comprising:

An orthodontic fixture for repositioning the teeth on which the orthodontic fixture is installed, including two or more brackets fixed on different teeth and fasteners installed on the brackets;

A shell-shaped orthosis, the shell-shaped orthosis includes a shell, the shell includes at least two sub-shells and a connecting part connecting the sub-shells; each of the sub-shells includes one or more sub-shells that can accommodate a cavity of a tooth, at least a portion of which is designed to relocate a tooth it accommodates without an orthodontic fixture installed;

Wherein, the orthodontic fixture is installed on at least part of the teeth between the adjacent sub-shells, and the connecting portion connects the adjacent sub-shells; During the process of gnawing and after wearing, the connecting part is not in contact with the orthodontic fixture; in the process of using the dental device, the connecting part is not in contact with the teeth located between the adjacent sub-shells. generating force.
The dental appliance of claim 1, wherein during use of the dental appliance, the connecting portion does not contact teeth located between the adjacent sub-housings.
11. The dental appliance of claim 1, wherein, during use of the dental appliance, the connecting portion contacts the teeth between the adjacent sub-housings but does not exert a force.
The dental appliance of claim 1, wherein the connecting portion and the orthodontic fixture are disposed on the same side or different sides of the teeth in a buccolingual or labiolingual direction.
The dental appliance according to claim 4, wherein when the connecting portion and the orthodontic fixture are arranged on the same side of the teeth, the connecting portion is not provided with any solid structure below the orthodontic fixture.
The dental appliance of claim 1, wherein the bracket is mounted on the labial side of the teeth in the anterior region, and the connecting portion includes a lingual side portion and does not contain a labial side portion.
The dental appliance of claim 1, wherein the bracket is mounted on the buccal surface of the posterior teeth, and the connecting portion includes a lingual surface portion and/or an occlusal surface portion, and does not contain a buccal surface portion.
The dental appliance of claim 1, wherein the bracket is mounted on the lingual side of the teeth in the anterior region, and the connecting portion includes a labial side portion and does not have a lingual side portion.
The dental appliance of claim 1, wherein the bracket is mounted on the lingual side of the posterior teeth, and the connecting portion includes a buccal side portion and/or an occlusal side and does not contain a lingual side portion.
The dental appliance of claim 1, wherein the connecting portion includes a labial/buccal side portion and a lingual side portion, wherein the connecting portion is provided only on the orthodontic fixture on the side on which the orthodontic fixture is mounted. above the fixation device.
The dental appliance of claim 1, wherein the connecting portion includes a labial/buccal side portion, an occlusal surface portion, and a lingual side portion, wherein the connecting portion is provided only on a side on which the orthodontic fixture is mounted above and/or on both sides of the orthodontic fixture.
The dental appliance of claim 1, wherein the connecting portion includes one or more connecting bodies connecting the adjacent sub-housings.
13. The dental appliance of claim 12, wherein the connecting portion comprises a plurality of connecting bodies, at least two of the connecting bodies are located on the same or different sides of the labial/buccal side, the lingual side, and the occlusal surface.
The dental appliance according to claim 12 or 13, wherein the connecting body is located on the labial/buccal side or the lingual side, and the width of the portion of the connecting body corresponding to the orthodontic fixture in the gingival-jaw direction is less than or equal to the corresponding The crown height of the tooth on which the orthodontic fixture is installed.
The dental appliance of claim 14, wherein the connecting body is located on the labial/buccal side, and the minimum distance between the connecting body and the outer surface of the tooth on which the orthodontic fixture is mounted is greater than or equal to zero.
The dental appliance according to claim 14, wherein the connecting body is located on the lingual side, and the minimum distance between the connecting body and the inner surface of the tooth on which the orthodontic fixture is mounted is greater than or equal to 0.
The dental appliance according to claim 12 or 13, wherein the connecting body is located on the occlusal surface, and the width of the portion of the connecting body corresponding to the orthodontic fixture in the buccal-lingual direction is less than or equal to the corresponding orthodontic fixture The width of the occlusal surface of the teeth of the appliance.
The dental appliance of claim 17, wherein the shape of the connecting body is substantially consistent with the occlusal surface of the corresponding tooth on which the orthodontic fixture is mounted.
The dental appliance according to claim 17, wherein the minimum distance between the connecting body and the highest point of the crown of the tooth on which the orthodontic fixture is installed is greater than or equal to 0.
A shell-like orthodontic appliance for use in the dental appliance according to any one of claims 1 to 19, comprising a housing comprising at least two sub-housings and a connecting portion connecting the sub-housings each of said sub-housings comprising one or more cavities capable of receiving teeth, at least a portion of said cavities being designed to relocate the contained teeth without orthodontic fixtures installed thereon;

The connecting portion connects the adjacent sub-shells; during and after the shell-shaped dental appliance is worn to the jaw, the connecting portion does not contact the orthodontic fixture; During the use of the shell-shaped appliance, the connecting portion and the teeth located between the adjacent sub-shells do not generate force.
A method for manufacturing a shell-shaped corrector as claimed in claim 20 , wherein the manufacturing of the shell-shaped corrector by a hot-pressed film forming process comprises the following steps:

S1. Acquisition of the initial dental model: obtain the digital dental model of any orthodontic step in the orthodontic plan as the initial dental model;

Any orthodontic step in the orthodontic plan is implemented by using an orthodontic fixture in cooperation with the shell-shaped fixture, and the orthodontic fixture is used to reposition the teeth on which the orthodontic fixture is installed, including fixing on different teeth more than two brackets and fasteners mounted on said brackets;

S2. Design of the digital jaw model: According to the design of the connection part in the shell-shaped appliance, a preset connection part model is designed on the teeth in the initial jaw model on which the orthodontic fixture is installed, to obtain Digital dental model including preset connector model;

S3. Manufacture of a solid dental model: based on the digital dental model including the preset connecting part model, a solid dental model including a preset connecting part is produced by using an additive manufacturing process;

S4. Hot-pressed film: hot-pressed film on the solid dental model to obtain a shell-shaped orthosis including a preset connection part;

S5. Cutting: cutting and removing excess parts along the gum line or adjacent to the gum line on the shell-shaped appliance including the preset connecting part, and cutting and removing the part corresponding to the teeth on which the orthodontic fixture is installed, cutting The latter shell-shaped orthodontic device includes at least two sub-shells, and the preset connecting parts are cut and shaped into connecting parts, so that the connecting parts are connected to the adjacent sub-shells; During and after the fitting of the orthodontic appliance to the jaw, the connecting portion is not in contact with the orthodontic fixture; during the use of the shell-shaped appliance, the connecting portion is in contact with the adjacent sub-shell. The teeth between the body do not produce force.
The manufacturing method of the shell-shaped orthosis according to claim 21, wherein the step S5 adopts laser cutting or mechanical cutting.