Shell-shaped dental instrument and dental correction system thereof

Abstract

The utility model discloses a shell-shaped dental instrument which comprises an appliance body, the appliance body comprises a plurality of cavities used for containing maxillary teeth or mandibular teeth, at least one cavity of the plurality of cavities is an eruption cavity used for containing eruption teeth, and at least one cavity of the plurality of cavities is a cavity used for containing the eruption teeth. The inner surface of the germination cavity and the outer surface of the germinated tooth are arranged in a clearance manner, and at least one first magnetic accessory is arranged on the germination cavity; the second magnetic accessory is arranged on the surface of the germinated tooth; a gap is formed between the first magnetic accessory and the second magnetic accessory; wherein after the shell-shaped dental instrument is worn, the germinated teeth realize expected movement through attraction or repulsion between the first magnetic accessory and the second magnetic accessory, and the shell-shaped dental instrument disclosed by the utility model can be used for correcting the germinated teeth in time when the germinated teeth grow unexpectedly, and correspondingly, the germinated teeth are prevented from being damaged. The utility model further provides a dental correction system.

Description

Technical Field

[0001] The embodiments of the present application relate to the technical field of dental orthodontics, and in particular to a shell-shaped dental appliance and a dental correction system thereof. Background Art

[0002] Invisible braces are recognized by consumers for their beauty, comfort and good correction effect. Adolescents are a special case. During a certain period of time, their deciduous teeth will fall out and their permanent teeth will erupt. This is different from the correction of adult permanent teeth. In the process of using invisible braces for correction, if the teeth are corrected according to the same structure as the actual model in their mouth, the part of the invisible braces corresponding to the unerupted teeth may be covered by the invisible braces. As the teeth erupt, the corresponding position of the invisible braces covers the adjacent gums, and the erupted teeth do not have enough space to erupt, which affects the normal eruption of the teeth, or the invisible braces cannot be worn after the teeth erupt.

[0003] At present, when using invisible braces to treat adolescent patients in the tooth replacement period, in order to allow the unerupted or erupting teeth to have sufficient eruption space, the part of the invisible braces corresponding to the unerupted or erupting teeth is often designed according to the tooth shape after the unerupted or erupting teeth are fully grown. In this way, the unerupted or erupting teeth will not come into contact with the invisible braces during the eruption process, thereby not interfering with the eruption of the unerupted or erupting teeth.

[0004] However, during the eruption process, the erupting teeth may also experience unexpected growth. For example, during the eruption process, the teeth may grow obliquely toward the distal, mesial, buccal or lingual sides. For such abnormal tooth growth, the current invisible braces are designed with an eruption part for the erupting teeth. The eruption part is designed according to the shape of the teeth after the erupting teeth are fully grown, so as to provide sufficient eruption space for the erupting teeth. Therefore, the erupting teeth will not come into contact with the eruption part of the invisible braces during the eruption stage. The invisible braces cannot correct the erupting teeth during the eruption stage, and can only correct the erupting teeth after they are fully erupted. On the one hand, this will prolong the patient's correction period. On the other hand, the malalignment caused by the fully erupted teeth has already taken shape. It will be time-consuming and labor-intensive to perform tooth correction after the erupting teeth are fully erupted, and the correction effect is not good. Summary of the invention

[0005] The main purpose of the utility model is to provide a shell-shaped dental instrument and a dental correction system thereof, so as to timely achieve the purpose of correction of an erupting tooth when the tooth has unexpected growth in the eruption stage.

[0006] To achieve the above object, an embodiment of the present application provides a shell-shaped dental appliance, including an appliance body, the appliance body includes a plurality of cavities for accommodating upper teeth or lower teeth, at least one of the plurality of cavities is an eruption cavity for accommodating erupting teeth, a gap is provided between the inner surface of the eruption cavity and the outer surface of the erupting teeth, and at least one first magnetic attachment is provided on the eruption cavity; and a second magnetic attachment provided on the surface of the erupting teeth; there is a gap between the first magnetic attachment and the second magnetic attachment; wherein, after wearing the shell-shaped dental appliance, the erupting teeth achieve desired movement through the attraction or repulsion between the first magnetic attachment and the second magnetic attachment.

[0007] Optionally, the first magnetic attachment is directly fixed on the inner surface or the outer surface of the eruption cavity.

[0008] Optionally, the first magnetic attachment is mounted on the eruption cavity through a mounting portion.

[0009] Optionally, the mounting portion is a receiving cavity, and the first magnetic attachment is fixedly mounted in the receiving cavity.

[0010] Optionally, the receiving cavity is integrally formed with the eruption cavity, and the receiving cavity is formed by local outward protrusion or local inward concavity of the eruption cavity.

[0011] Optionally, the receiving cavity is separately formed from the eruption cavity, and the receiving cavity is fixedly connected to the outer surface or the inner surface of the eruption cavity.

[0012] Optionally, the eruption cavity is provided with a buffer cavity opening towards the side of the erupting teeth, and a mounting table is formed by protruding from the side of the buffer cavity away from the erupting teeth out of the eruption cavity. The first magnetic attachment is provided on the mounting table, and under the action of the first magnetic attachment, the second magnetic attachment at least partially enters the buffer cavity through the opening.

[0013] Optionally, at least two second magnetic attachments are provided on the surface of the erupting teeth. Corresponding to each second magnetic attachment, a corresponding first magnetic attachment is provided on the eruption cavity to form a pair of magnetic attachments. The attraction or repulsion between each pair of magnetic attachments forms a resultant moment to achieve the desired movement of the erupting teeth.

[0014] Optionally, the second magnetic attachment is provided at the mesio-buccal incisal edge / mesio-lingual incisal edge of the erupting teeth, the first magnetic attachment is correspondingly provided at the corresponding position of the eruption cavity, and the first magnetic attachment and the second magnetic attachment generate an orthodontic force that causes the erupting teeth to move from the buccal side to the lingual side or from the lingual side to the buccal side through mutual attraction or repulsion.

[0015] Optionally, the second magnetic attachment is disposed at the mesial incisal edge or the distal incisal edge of the erupting tooth, and the first magnetic attachment is correspondingly disposed at the corresponding position of the eruption cavity. The first magnetic attachment and the second magnetic attachment generate a corrective force that causes the erupting tooth to move from mesial to distal or from distal to mesial through mutual attraction or repulsion.

[0016] To achieve the above object, the present invention further provides a dental orthodontic system, including N shell-shaped appliances for gradually moving a patient's dental arch from a first tooth layout to a second tooth layout. At least M of the N shell-shaped appliances are any one of the above-mentioned shell-shaped dental instruments, where M ≤ N, and M and N are positive integers.

[0017] Compared with the prior art, a shell-shaped dental instrument and a dental orthodontic system thereof according to the present invention have the following beneficial effects:

[0018] 1. By respectively disposing mutually attractive or repulsive magnetic attachments in the cavity corresponding to the erupting tooth and on the erupting tooth, the present invention provides a corrective force for the desired movement of the erupting tooth through the attraction or repulsion between the two magnetic attachments, realizing timely orthodontics of the erupting tooth during the eruption stage.

[0019] 2. The present invention is provided with a buffer cavity having an opening facing the side of the erupting tooth in the eruption cavity corresponding to the erupting tooth, so that the second magnetic attachment disposed on the surface of the erupting tooth can partially enter the buffer cavity, thereby avoiding contact with the eruption cavity and affecting the normal eruption of the erupting tooth.

[0020] 3. The present invention realizes a resultant moment on the erupting tooth through multiple magnetic attachment pairs, so that the erupting tooth can more effectively achieve the desired movement. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] One or more embodiments are exemplarily illustrated by pictures in the corresponding drawings, and these exemplary illustrations do not constitute a limitation on the embodiments.

[0022] Figure 1 is a schematic diagram of a dental arch with an erupting tooth in the present application;

[0023] Figure 2 is a schematic structural diagram of the shell-shaped dental instrument of the present application;

[0024] Figure 3 is a schematic structural diagram of the eruption cavity and the erupting tooth in some embodiments of the present application;

[0025] Figure 4Schematic diagram of the eruption cavity and the erupting tooth according to another embodiment of the present application;

[0026] Figure 5 Schematic diagram of the eruption cavity and the erupting tooth according to another embodiment of the present application;

[0027] Figure 6 Schematic diagram of the eruption cavity and the erupting tooth according to another embodiment of the present application;

[0028] Figure 7 Schematic diagram of the eruption cavity and the erupting tooth according to another embodiment of the present application;

[0029] Figure 8 Schematic diagram of the eruption cavity and the erupting tooth according to another embodiment of the present application;

[0030] Figure 9 Schematic diagram of the magnetic attachment of the erupting tooth inclined buccally in some embodiments of the present application;

[0031] Figure 10 Schematic diagram of the magnetic attachment of the erupting tooth inclined mesially in some embodiments of the present application;

[0032] Figure 11 Schematic diagram of applying a moving force to the erupting tooth by using multiple magnetic attachments in some embodiments of the present application. Detailed implementation manners

[0033] To make the objectives, technical solutions and advantages of the embodiments of the present application clearer, the embodiments of the present application will be elaborated in detail below with reference to the accompanying drawings. However, those of ordinary skill in the art can understand that in the embodiments of the present application, many technical details are presented for the readers to better understand the present application. However, even without these technical details and various changes and modifications based on the following embodiments, the technical solutions required to be protected by the present application can still be implemented. The following division of each embodiment is for convenience of description and should not constitute any limitation on the specific implementation manner of the present application. Each embodiment can be combined and cross-referenced with each other on the premise of not being contradictory.

[0034] To make the drawings concise, only the parts related to the present utility model are schematically shown in each drawing, and they do not represent the actual structure of the product. In addition, to make the drawings concise and easy to understand, in some drawings, for components with the same structure or function, only one of them is schematically shown, or only one of them is marked. In this document, "one" not only means "only this one", but also can mean "more than one" situation.

[0035] As can be seen from the background art, for an invisible orthodontic appliance designed for a dental arch with erupting teeth, a protruding part is usually provided in the part of the invisible orthodontic appliance corresponding to the erupting teeth to provide sufficient erupting space for the erupting teeth. The erupting teeth will not come into contact with the protruding part during the eruption process. In this way, when the erupting teeth need to be corrected due to unexpected growth during the eruption stage, the erupting teeth cannot be corrected in time, and can only be corrected after the erupting teeth have fully erupted. On the one hand, this prolongs the treatment cycle of the patient. On the other hand, the malalignment caused by the fully erupted teeth has taken shape. Correcting the teeth after the erupting teeth have fully erupted will be time-consuming and laborious, and the treatment effect is not good.

[0036] Based on this, the present utility model provides a shell-shaped dental instrument, which includes an orthodontic appliance body having a plurality of cavities for accommodating the patient's teeth. At least one of the plurality of cavities is used to accommodate the erupting teeth and provide sufficient erupting space for the erupting teeth. For the erupting teeth that need to be corrected, the present utility model respectively provides mutually attracting or repelling magnetic attachments on the cavity corresponding to the erupting teeth and on the erupting teeth, so as to provide a corrective force for the desired movement of the erupting teeth through the attraction or repulsion between the two magnetic attachments, and realize the timely correction of the erupting teeth during the eruption stage.

[0037] In order to make the purpose, technical solution and advantages of the present utility model clearer, the following will elaborate on each embodiment of the present application with reference to the accompanying drawings. However, those of ordinary skill in the art can understand that in each embodiment of the present application, many technical details are provided for the reader to better understand the present application. However, even without these technical details and various changes and modifications based on the following embodiments, the technical solutions claimed in the present application can still be realized. The following division of each embodiment is for convenience of description and should not constitute any limitation to the specific implementation manner of the present application. Each embodiment can be combined and cross-referenced with each other on the premise of no contradiction.

[0038] The following will specifically describe the shell-shaped dental instrument of the present application with reference to specific embodiments. The following content is only implementation details provided for convenient understanding and is not necessary for implementing the solution.

[0039] As Figure 1 - Figure 2 shown, the present utility model provides a shell-shaped dental instrument, including an orthodontic appliance body 110. The orthodontic appliance body 110 includes a plurality of cavities for accommodating multiple upper teeth or multiple lower teeth. Figure 1The dental arch structure including multiple teeth in this embodiment is shown, where 100 is the tooth in eruption in the dental arch. The cavity in the multiple cavities of the appliance body 110 corresponding to the tooth in eruption serves as the eruption cavity 111 for accommodating the tooth in eruption 100. The inner surface of the eruption cavity 111 is set with a gap from the tooth surface of the tooth in eruption 100, that is, the inner surface of the eruption cavity 111 does not contact the tooth surface of the tooth in eruption 100, so as to provide an eruption space for the tooth in eruption 100. At least one second magnetic attachment 100a is provided on the tooth surface of the tooth in eruption 100. Corresponding to the second magnetic attachment 100a, at least one first magnetic attachment 111a is provided on the eruption cavity 111. After wearing the shell-shaped dental appliance, there is a gap between the first magnetic attachment 111a and the second magnetic attachment 100a, so that the tooth in eruption 100 has a corresponding eruption space during the eruption process; when the patient wears the shell-shaped dental appliance, the first magnetic attachment 111a and the second magnetic attachment 100a attract or repel each other, and the tooth in eruption 100 can generate an orthodontic force that promotes the movement of the tooth in eruption 100 through the attraction or repulsion between the first magnetic attachment 111a and the second magnetic attachment 100a, so that the tooth in eruption 100 can achieve the desired movement.

[0040] In some embodiments, the eruption cavity can be a cavity with the same shape as the tooth after complete eruption formed based on the prediction of the state of the tooth in eruption after complete eruption, or a cavity with a different shape from the tooth shape designed based on the morphological parameters of the tooth after complete eruption, such as a columnar structure adapted to the morphological parameters of the tooth after complete eruption, as long as the tooth in eruption never touches the eruption cavity during the eruption stage. The present invention does not limit the shape of the eruption cavity. In the present invention, the cavities in the appliance body 110 for accommodating other permanent teeth can have tooth orthodontic functions, that is, the geometric structures of the cavities can be the same as the orthodontic goals of the teeth corresponding to each orthodontic step of the current shell-shaped dental appliance, so as to gradually move the corresponding teeth to the orthodontic goal through the geometric structure of the cavities of the appliance body; for the other cavities in the appliance body 110 for accommodating permanent teeth, only the cavities corresponding to some teeth can have tooth orthodontic functions, while the cavities corresponding to the other teeth only have the function of wrapping the teeth without orthodontic functions. At this time, the geometric structure of the tooth cavity without orthodontic functions is the same as the current state of the corresponding tooth.

[0041] In each embodiment of the present utility model, the first magnetic attachment 111a and the second magnetic attachment 100a are small magnet structures. By the mutual attraction or repulsion between the magnets, an orthodontic force is generated to move the erupting tooth 100 towards the correct position. In some embodiments, the second magnetic attachment 100a can be fixed to the tooth surface of the erupting tooth 100 by an adhesive method. The size of the second magnetic attachment 100a can be designed according to the orthodontic force required to meet the desired movement of the erupting tooth 100. Its shape can be a cuboid, a cylinder, a sphere or any other shape. Generally speaking, in order to reduce the foreign body sensation of the second magnetic attachment 100a in the patient's mouth, at least the contour edge of the second magnetic attachment 100a exposed to the patient's oral cavity is preferably smoothed, such as an arc edge after smoothing, so as to improve the comfort of the patient.

[0042] In some embodiments, the first magnetic attachment 111a can be directly fixed to the outer surface of the eruption cavity 111 corresponding to the second magnetic attachment 100a. Taking the 4th tooth in the posterior tooth area of the erupting tooth 100 as an example, as Figure 4 shown, the first magnetic attachment directly fixed to the outer surface of the eruption cavity 111 does not occupy the eruption space between the eruption cavity 111 and the erupting tooth 100. In this way, it can be ensured that at any eruption stage of the erupting tooth 100, the eruption of the erupting tooth 100 will not be affected. On the other hand, since the first magnetic attachment 111a is located on the outer surface of the eruption cavity 111, when wearing a shell-shaped dental appliance, the first magnetic attachment 111a will be exposed to the patient's oral cavity and come into contact with other tissue structures in the patient's oral cavity, thus increasing the foreign body sensation in the patient's mouth and reducing the comfort of the patient. Therefore, in other embodiments, considering that there is enough space for eruption between the eruption cavity 111 and the erupting tooth 100, especially in the initial stage of the eruption of the erupting tooth, at this time, in order to reduce the foreign body sensation of the patient, the first magnetic attachment 111a can be fixed to the inner surface of the eruption cavity 111 corresponding to the second magnetic attachment 100a, as Figure 3As shown, at this time, the first magnetic attachment 111a is wrapped in the cavity of the eruption cavity 111. While achieving the orthodontic treatment of the erupting tooth 100, it can minimize the foreign body sensation of the patient. Of course, as the erupting tooth 100 further erupts, especially when it is close to complete eruption, the gap between the eruption cavity 111 and the erupting tooth 100 gradually decreases. At this time, the gap between the eruption cavity 111 and the erupting tooth 100 may not be sufficient to accommodate the first magnetic attachment 111a, or setting the first magnetic attachment 111a on the inner surface of the eruption cavity 111 may affect the eruption of the erupting tooth. At this time, the first magnetic attachment 111a can be set on the outer surface of the eruption cavity 111 to ensure that the erupting tooth can erupt normally. For the direct fixing method of the first magnetic attachment 111a to the inner or outer surface of the eruption cavity 111, it can be any one of bonding, welding or riveting, and the present utility model does not make a limitation. Similarly, the size of the second magnetic attachment 100a can be set according to the orthodontic force required to satisfy the desired movement of the erupting tooth 100, and its shape can be a cube, a cylinder, or any other shape. It should be noted that in order to reduce the foreign body sensation of the first magnetic attachment 111a in the patient's mouth, at least the contour edge of the first magnetic attachment 111a exposed to the patient's oral cavity is preferably smoothed, such as a smoothed arc edge, to improve the comfort of the patient.

[0043] Considering that the first magnetic attachment 111a is a magnet and its material is generally a material with a relatively high hardness such as metal, directly exposing it to the patient's oral cavity and contacting the tissues in the patient's mouth will affect the comfort of the patient wearing the shell-shaped dental appliance. Therefore, in some embodiments, the first magnetic attachment 111a can also be installed on the eruption cavity 111 through an installation part 112. The installation part 112 is a receiving cavity provided on the eruption cavity 111, and the first magnetic attachment 111a is fixedly installed in the receiving cavity. In this embodiment, by fixing the first magnetic attachment 111a in the receiving cavity, the direct contact between the first magnetic attachment 111a and other tissues in the patient's oral cavity during wearing can be avoided, and the comfort of the patient can be improved.

[0044] In some specific embodiments, the receiving cavity is integrally formed with the eruption cavity 111. Among them, the receiving cavity can be formed by the local outward or inward convexity of the eruption cavity. As Figure 5As shown, an installation part 112 with a receiving cavity is formed by local outward convexity of the eruption cavity 111. The first magnetic attachment 111a is fixed in the receiving cavity. The installation part formed by local outward convexity of the eruption cavity 111 will not reduce the eruption space between the eruption cavity 111 and the erupting tooth 100, and will not affect the eruption of the erupting tooth 100. Moreover, the first magnetic attachment 111a is located in the receiving cavity of the installation part 112, and the edge contour of the first magnetic attachment 111a will not directly contact the patient's oral cavity, improving the patient's comfort. However, in this embodiment, the locally outward convex installation part 112 may still cause a foreign body sensation in the patient. To further reduce the foreign body sensation of the patient, as Figure 6 As shown, in some examples, the installation part 112 can also be a receiving cavity formed by local inward concavity of the eruption cavity 111. This situation is especially suitable for the initial stage of the eruption of the erupting tooth. At this time, there is a relatively large eruption space between the eruption cavity 111 and the erupting tooth 100. The locally inward concave formation of the receiving cavity will not affect the normal eruption of the erupting tooth 100. Of course, as the erupting tooth 100 further erupts, especially when it is close to complete eruption, at this time, the local inward concavity of the eruption cavity 111 may cause the erupting tooth 100 to have no normal eruption space, affecting its normal eruption. At this time, the first magnetic attachment 111a can be directly fixed on the outer surface of the eruption cavity 111, or the eruption cavity 111 can be fixed in the receiving cavity of the locally outward convex installation part 112 through the locally outward convex installation part 112.

[0045] In some other embodiments, the receiving cavity and the eruption cavity 111 can also be integrally formed. That is, first, an installation part 112 with a receiving cavity is formed according to the size of the first magnetic attachment 111a, then the first magnetic attachment 111a is fixed in the receiving cavity of the installation part 112, and then the installation part with the first magnetic attachment 111a is fixedly installed on the inner surface or the outer surface of the eruption cavity 111 corresponding to the second magnetic attachment 100a. The integrally formed receiving cavity is convenient for preparation.

[0046] Since the second magnetic attachment 100a is disposed on the surface of the erupting tooth 100, as the erupting tooth 100 erupts, the gap between the erupting tooth 100 and the eruption cavity 111 gradually decreases. When the gap decreases to the point where the side of the second magnetic attachment 100a facing the eruption cavity 111 contacts the eruption cavity 111, if the erupting tooth 100 is still not fully erupted at this time, the eruption cavity 111 will no longer be able to provide eruption space for the erupting tooth 100, thus affecting the eruption of the erupting tooth 100. To solve this problem, in some embodiments, the eruption cavity 111 is provided with a buffer cavity 111b having an opening facing the side of the erupting tooth 100. The side of the buffer cavity 111b away from the erupting tooth 100 protrudes from the eruption cavity 111 to form a mounting platform, and the first magnetic attachment 111a is fixedly mounted on the mounting platform. In the initial eruption stage of the erupting tooth 100, there is sufficient eruption space between the eruption cavity 111 and the erupting tooth 100, and the second magnetic attachment 100a will not enter the buffer cavity 111b, as Figure 7 shown. However, as the erupting tooth 100 further erupts, the second magnetic attachment 100a will cause the eruption space between the eruption cavity 111 and the erupting tooth 100 to decrease. To avoid contact between the second magnetic attachment 100a and the eruption cavity 111, the buffer cavity 111b is provided corresponding to the second magnetic attachment 100a, so that the second magnetic attachment 100a can enter at least partially into the buffer cavity 111b through the opening under the action of the first magnetic attachment, as Figure 8 shown, to avoid contact with the eruption cavity 111 and affect the normal eruption of the erupting tooth 100.

[0047] There are many types of malpositioned growth of teeth. Here, taking the inclined growth of teeth as an example, the installation of the first magnetic attachment and the second magnetic attachment will be described. For teeth with inclined growth, generally, while moving the crown of the tooth in a certain direction, the root of the tooth needs to be moved in the opposite direction to correct the inclined growth of the tooth. Usually, there are four cases of inclined growth of teeth: inclined growth towards the buccal side, inclined growth towards the lingual side, inclined growth towards the mesial side, and inclined growth towards the distal side. The following will separately describe the four cases:

[0048] For the erupting tooth 100 with inclined growth towards the buccal side, it needs to be moved from the buccal side to the lingual side. The second magnetic attachment 100a is disposed at the near-buccal incisal edge of the erupting tooth 100, and the first magnetic attachment 111a is correspondingly disposed at the corresponding position of the eruption cavity 111, so that the mutual repulsion between the first magnetic attachment 111a and the second magnetic attachment 100a gives the tooth a moving force to move from the buccal side to the lingual side, as Figure 9As shown, or the second magnetic attachment 100a is disposed at the near lingual incisal edge of the erupting tooth 100, and the first magnetic attachment 111a is correspondingly disposed at the corresponding position of the erupting cavity 111, so that the mutual attraction between the first magnetic attachment 111a and the second magnetic attachment 100a gives the tooth a moving force to move from the buccal side to the lingual side; similarly, for the erupting tooth 100 that grows inclined lingually, it is necessary to move it from the lingual side to the buccal side. The second magnetic attachment 100a is disposed at the near lingual incisal edge of the erupting tooth 100, and the first magnetic attachment 111a is correspondingly disposed at the corresponding position of the erupting cavity 111, so that the repulsion between the first magnetic attachment 111a and the second magnetic attachment 100a gives the tooth a moving force to move from the lingual side to the buccal side; or, the second magnetic attachment 100a can also be disposed at the near buccal incisal edge of the erupting tooth 100, and the first magnetic attachment 111a is correspondingly disposed at the corresponding position of the erupting cavity 111, so that the attraction between the first magnetic attachment 111a and the second magnetic attachment 100a gives the tooth a moving force to move from the lingual side to the buccal side;

[0049] For the erupting tooth 100 that grows inclined mesially, it is necessary to move it from the mesial to the distal. The second magnetic attachment 100a is disposed at the near mesial incisal edge of the erupting tooth 100, and the first magnetic attachment 111a is correspondingly disposed at the corresponding position of the erupting cavity 111, as Figure 10 shown, so that the mutual repulsion between the first magnetic attachment 111a and the second magnetic attachment 100a gives the tooth a moving force to move from the mesial to the distal, or the second magnetic attachment 100a is disposed at the distal incisal edge of the erupting tooth 100, and the first magnetic attachment 111a is correspondingly disposed at the corresponding position of the erupting cavity 111, so that the mutual attraction between the first magnetic attachment 111a and the second magnetic attachment 100a gives the tooth a moving force to move from the mesial to the distal; for the erupting tooth 100 that grows inclined distally, it is necessary to move it from the distal to the mesial. The second magnetic attachment 100a is disposed at the near distal incisal edge of the erupting tooth 100, and the first magnetic attachment 111a is correspondingly disposed at the corresponding position of the erupting cavity 111, so that the repulsion between the first magnetic attachment 111a and the second magnetic attachment 100a gives the tooth a moving force to move from the distal to the mesial; or, the second magnetic attachment 100a can also be disposed at the near mesial incisal edge of the erupting tooth 100, and the first magnetic attachment 111a is correspondingly disposed at the corresponding position of the erupting cavity 111, so that the attraction between the first magnetic attachment 111a and the second magnetic attachment 100a gives the tooth a moving force to move from the distal to the mesial.

[0050] In the above embodiments, for the erupting tooth 100, only one second magnetic attachment fixed to the erupting tooth 100 and the corresponding first magnetic attachment mounted on the eruption cavity are shown, that is, only a pair of magnetic attachment pairs are shown. However, it can be understood that in many cases, the desired movement of the tooth requires the resultant moment formed by forces in different directions. Therefore, in some embodiments, at least two second magnetic attachments are provided on the tooth surface of the erupting tooth 100. Corresponding to each second magnetic attachment, a corresponding first magnetic attachment is provided on the eruption cavity 110 to form a magnetic attachment pair. The attraction or repulsion between the magnetic attachment pairs forms a resultant moment to achieve the desired movement of the erupting tooth. For example, as Figure 11 shown, to achieve the rotation of the erupting tooth 100, second magnetic attachments 100a are respectively fixed on the mesial surface and the distal surface of the erupting tooth 100, and corresponding first magnetic attachments 111a are fixed on the outer surface of the corresponding eruption cavity 111. The two pairs of magnetic attachment pairs can form corresponding forces F1 and F2 through mutual attraction or repulsion. The combined action of forces F1 and F2 forms a resultant moment to achieve the rotation of the erupting tooth 100. The present utility model can design multiple magnetic attachment pairs according to the movement requirements of the erupting tooth to provide a resultant moment for it, so that the erupting tooth can be timely corrected during the eruption stage.

[0051] In some other embodiments, the present utility model further provides a dental correction system, which includes N shell-shaped orthodontic appliances for gradually moving the patient's dentition from a first tooth layout to a second tooth layout. At least M of the N shell-shaped orthodontic appliances are the shell-shaped dental instruments in the above embodiments, where M≤N, and M and N are positive integers.

[0052] The first tooth layout may be the original dentition layout when the patient starts orthodontic treatment, or the dentition layout after a period of orthodontic treatment. The first tooth layout includes at least one unerupted or erupting tooth. The second tooth layout may be the final dentition layout of the patient's orthodontic treatment, or the stage target layout at a certain stage of orthodontic treatment. In the second tooth layout, the unerupted or erupting tooth may have fully erupted or may still be in the erupting state. Specifically, obtain a three-dimensional digital model of the teeth representing the first dentition layout. For example, make a physical tooth model according to the patient's current tooth state, or the state of the teeth and their surrounding tissues (such as gums, facial soft tissues) (such as making a plaster tooth model by taking an impression), and then scan the physical tooth model to generate a virtual tooth model representing the original state of the patient's teeth (corresponding to the basic tooth state). Of course, it is also possible to directly obtain images of the teeth, or the teeth and their surrounding tissues, through optical scanning, three-dimensional photography, three-dimensional videography, or medical CT scanning, and generate an original virtual tooth model through computer processing. This virtual tooth model can be digitally processed and displayed.

[0053] Then, based on the virtual tooth model of the first dentition layout and the second dentition layout, set at least one orthodontic parameter to automatically form a series of tooth orthodontic states that gradually progress to the second dentition layout. The series of tooth orthodontic states reflect the favorable changes in the tooth structure or arrangement after a series of orthodontic steps on the tooth model of the first dentition layout. Generally speaking, the entire orthodontic process includes at least one orthodontic step (for example, including 20-40 orthodontic steps). Each orthodontic step corresponds to a tooth orthodontic state, and each tooth orthodontic state corresponds to a target three-dimensional digital model of the teeth.

[0054] Next, for the target three-dimensional digital model of the teeth with corresponding unerupted or erupting teeth, design an eruption part digital model for the part of the unerupted or erupting teeth. The eruption part digital model is generated based on the prediction of the fully erupted state of the unerupted or erupting teeth.

[0055] Next, based on each target tooth three-dimensional digital model, a physical tooth model is generated through rapid prototyping processing, that is, corresponding physical tooth models are manufactured according to a series of target tooth three-dimensional digital models. The rapid prototyping technology may include the following typical forming processes: Stereolithography Apparatus (SLA), Laminated Object Manufacturing (LOM), Selected Laser Sintering (SLS), Fused Deposition Modeling (FDM), Three Dimensional Printing (3DP), etc.

[0056] After obtaining the physical tooth models of each target tooth three-dimensional digital model, corresponding N shell-shaped dental appliances can be prepared based on each physical tooth model. Each shell-shaped dental appliance includes an appliance body, and the appliance body includes a plurality of cavities for accommodating upper jaw teeth or lower jaw teeth. At least one of the plurality of cavities is an eruption cavity for accommodating erupting teeth, and the inner surface of the eruption cavity is set with a gap from the outer surface of the erupting teeth.

[0057] After the patient wears the N shell-shaped dental appliances in sequence for tooth correction, when it is necessary to correct the erupting teeth, M of the shell-shaped dental appliances can be selected. At least one first magnetic attachment is provided on the eruption cavity of each of the M shell-shaped dental appliances; a second magnetic attachment is provided corresponding to the surface of the erupting teeth, and a gap is provided between the first magnetic attachment and the second magnetic attachment; so that after wearing the shell-shaped dental appliance, the erupting teeth achieve the desired movement through the attraction or repulsion between the first magnetic attachment and the second magnetic attachment, and the purpose of correcting the erupting teeth gradually during the eruption stage is achieved.

[0058] Those of ordinary skill in the art can understand that the above embodiments are specific embodiments for implementing the present application, and in practical applications, various changes can be made in form and details without departing from the spirit and scope of the present application.

Claims

1. A shell-shaped dental instrument, characterized in that, It includes an appliance body, the appliance body includes a plurality of cavities for accommodating maxillary teeth or mandibular teeth, at least one of the plurality of cavities is an eruption cavity for accommodating erupting teeth, the inner surface of the eruption cavity is arranged with a gap from the outer surface of the erupting teeth, and at least one first magnetic attachment is arranged on the eruption cavity; and a second magnetic attachment arranged on the surface of the erupting teeth; there is a gap between the first magnetic attachment and the second magnetic attachment; wherein, after wearing the shell-shaped dental appliance, the erupting teeth achieve desired movement through the attraction or repulsion between the first magnetic attachment and the second magnetic attachment.

2. The shell-shaped dental instrument according to claim 1, characterized in that, The first magnetic attachment is directly fixed on the inner surface or the outer surface of the eruption cavity.

3. The shell-shaped dental instrument according to claim 1, wherein The first magnetic attachment is mounted on the eruption cavity through a mounting portion.

4. The shell-shaped dental instrument according to claim 3, wherein, The mounting portion is a receiving cavity, and the first magnetic attachment is fixedly mounted in the receiving cavity.

5. The shell-shaped dental instrument according to claim 4, wherein, The receiving cavity is integrally formed with the eruption cavity, and the receiving cavity is formed by local outward convexity or local inward concavity of the eruption cavity.

6. The shell-shaped dental instrument according to claim 4, wherein, The receiving cavity is separately formed from the eruption cavity, and the receiving cavity is fixedly connected to the outer surface or the inner surface of the eruption cavity.

7. The shell-shaped dental instrument according to claim 1, wherein, The eruption cavity is provided with a buffer cavity opening towards the side of the erupting teeth, a mounting platform protrudes from the side of the buffer cavity away from the erupting teeth out of the eruption cavity, the first magnetic attachment is arranged on the mounting platform, and under the action of the first magnetic attachment, the second magnetic attachment at least partially enters the buffer cavity through the opening.

8. The shell-shaped dental instrument according to any one of claims 1-7, characterized in that, At least two second magnetic attachments are arranged on the surface of the erupting teeth. Corresponding to each second magnetic attachment, a corresponding first magnetic attachment is arranged on the eruption cavity to form a pair of magnetic attachments. The attraction or repulsion between each pair of magnetic attachments forms a resultant moment to achieve the desired movement of the erupting teeth.

9. The shell-shaped dental instrument according to any one of claims 1-7, characterized in that, The second magnetic attachment is arranged at the mesio-buccal incisal edge / mesio-lingual incisal edge of the erupting teeth, the first magnetic attachment is correspondingly arranged at the corresponding position of the eruption cavity, and the first magnetic attachment and the second magnetic attachment generate an orthodontic force that causes the erupting teeth to move from the buccal side to the lingual side or from the lingual side to the buccal side through mutual attraction or repulsion.

10. The shell-shaped dental instrument according to any one of claims 1 to 7, characterized in that, The second magnetic attachment is arranged at the mesio-incisal edge or the distal-incisal edge of the erupting teeth, the first magnetic attachment is correspondingly arranged at the corresponding position of the eruption cavity, and the first magnetic attachment and the second magnetic attachment generate an orthodontic force that causes the erupting teeth to move from the mesial to the distal or from the distal to the mesial through mutual attraction or repulsion.

11. A dental orthodontic system includes N shell-shaped orthodontic appliances for gradually moving a patient's dentition from a first tooth layout to a second tooth layout, characterized in that, At least M of the N shell-shaped appliances are the shell-shaped dental appliances described in any one of claims 1-10, where M≤N, and M and N are positive integers.

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