Correction system for closing tooth space

Abstract

The embodiment of the utility model provides an orthodontic system for closing tooth gaps, which is used for being worn on an upper jaw dentition generating gaps after tooth extraction, and comprises a first tooth accommodating part for wrapping teeth in an anterior tooth area and a second tooth accommodating part for wrapping teeth in a posterior tooth area, the second tooth accommodating part comprises a first shell-shaped body which correspondingly wraps the teeth on the left side of the rear tooth area, a second shell-shaped body which correspondingly wraps the teeth on the right side of the rear tooth area, and a palate connecting part which is connected with the tongue side edge of the first shell-shaped body and the tongue side edge of the second shell-shaped body; a fixing part used for hanging an elastic piece is arranged on the lingual side face of the palate connecting part, a traction part is arranged on the first tooth containing part or the tooth surface, corresponding to teeth, of the first tooth containing part, and when the two ends of the elastic piece are hung on the traction part and the fixing part respectively, the elastic piece is hung on the elastic piece. The teeth wrapped by the first tooth storage part move towards the direction of the second tooth storage cavity.

Description

Technical Field

[0001] This application relates to the field of orthodontic technology, and in particular to a correction system for closing interdental spaces. Background Technology

[0002] In invisible orthodontic treatment, controlling the anchorage of posterior teeth during anterior tooth movement to close gaps in cases requiring tooth extraction (symmetrical extraction of 4 teeth) is a key aspect of the treatment. Invisible orthodontic treatment for extraction cases typically takes a long time, approximately 2-3 years. This is because moving teeth using a single-layer aligner requires controlling the amount of tooth movement per step, as well as the position of teeth moved simultaneously. Since the principle of invisible orthodontic treatment is to apply orthodontic force to teeth through the elastic deformation of the material, current invisible orthodontic aligners cannot apply the corrective force required to move multiple anterior teeth as a whole in a single step. To achieve overall retraction of the anterior teeth, invisible orthodontic treatment often involves a step-by-step retraction of canines and incisors, using multiple aligners to gradually achieve the effect of anterior tooth retraction. However, for these cases requiring extraction to close gaps, a relatively large number of total movement steps (at least around 60 steps) are usually needed. During orthodontic treatment, due to the cumulative error of each set of clear aligners, problems may arise such as the aligners not fitting properly to the teeth and failing to apply force effectively. Furthermore, the force applied by clear aligners is not continuous. When the force of the clear aligners decreases, the tooth roots may not have moved into place, resulting in a "roller coaster" phenomenon and subsequent treatment failure. In such cases, more time needs to be spent to straighten the tooth axis and close the gaps, making secondary orthodontic treatment even more difficult.

[0003] Therefore, it is of great significance to enhance anchorage and improve the efficiency of anterior tooth retraction during the process of closing the gap in tooth extraction cases. Utility Model Content

[0004] The purpose of this application is to provide an orthodontic system that effectively solves the above-mentioned problems by closing the gaps between teeth. This system can enhance anchorage during the retraction of teeth in the anterior region, thereby achieving overall retraction of teeth in the anterior region and effectively improving orthodontic efficiency.

[0005] To achieve the above object, the embodiment of the present application provides a tooth gap closing orthodontic system for being worn on the upper jaw after tooth extraction, characterized in that the system comprises a first tooth receiving part for wrapping the teeth in the anterior tooth area and a second tooth receiving part for wrapping the teeth in the posterior tooth area, the second tooth receiving part comprises a first shell-shaped body for wrapping the teeth in the left part of the posterior tooth area, a second shell-shaped body for wrapping the teeth in the right part of the posterior tooth area, and a palate connecting part connected to the lingual side edges of the first shell-shaped body and the second shell-shaped body, the lingual side of the palate connecting part is provided with a fixing part for suspending an elastic member, and the lingual side of the first tooth receiving part or the lingual side surface of the corresponding teeth of the first tooth receiving part is provided with a pulling part, wherein, when worn, the left distal end of the first tooth receiving part and the mesial end of the first shell-shaped body are located on the left side of the gap, the right distal end of the first tooth receiving part and the mesial end of the second shell-shaped body are located on the right side of the gap, and when the two ends of the elastic member are suspended on the pulling part and the fixing part respectively, the teeth wrapped by the first tooth receiving part move to the direction of the second tooth receiving cavity.

[0006] Preferably, the two distal ends of the first tooth receiving part do not wrap the distal side surface of the corresponding teeth.

[0007] Preferably, the first tooth receiving part has a plurality of tooth receiving cavities, wherein the tooth receiving cavities corresponding to the two distal ends of the first tooth receiving part do not have distal end surfaces, or the distal end surfaces of the tooth receiving cavities corresponding to the two distal ends of the first tooth receiving part are arranged at a distance from the distal side surface of the corresponding teeth.

[0008] Preferably, when the pulling part is arranged on the tooth surface, the lingual side of the first tooth receiving part corresponds to the incisal third of the tooth.

[0009] Preferably, when the pulling part is arranged on the tooth surface, the lingual side of the first tooth receiving part is provided with an opening structure at the position corresponding to the pulling part.

[0010] Preferably, when the pulling part is arranged on the first tooth receiving part, the first tooth receiving part is provided with a mounting platform corresponding to the pulling part, and the mounting platform is formed by the surface of the first tooth receiving part being protruded in the distal direction.

[0011] Preferably, the number of the pulling parts is 2, 4 or 6, wherein the plurality of pulling parts are arranged corresponding to the same tooth number, or the plurality of pulling parts are arranged symmetrically about the dental midline.

[0012] Preferably, the palate connecting part is an arch-shaped structure matching the shape of the palate.

[0013] As a preference, the number of the fixing parts is even, and the fixing parts are arranged symmetrically relative to the dental midline.

[0014] As a preference, one or more of the pulling parts on one side of the dental midline are respectively hung on the fixing parts on the same side through elastic members.

[0015] Compared with the prior art, the orthodontic system for closing the tooth gap provided by the utility model has the advantages that:

[0016] The orthodontic system for closing the tooth gap in the application comprises a first tooth receiving part and a second tooth receiving part which are arranged in two parts, the left and right shell-shaped bodies of the second tooth receiving part wrap the bilateral teeth in the posterior tooth area respectively, the mesial ends of the left and right shell-shaped bodies are located on the two sides of the tooth extraction gap respectively, and the distal ends of the first tooth receiving part, and the second tooth receiving part can bind all the teeth in the posterior tooth area together through the palate connecting part to provide strong anchorage in the process of the anterior tooth retraction, thereby avoiding the problem that the posterior tooth is prone to displacement when the anterior tooth is pulled due to insufficient anchorage. In addition, the pulling part in the orthodontic system in the application is located on the lingual side of the anterior tooth area, so that the force point is closer to the impedance center of the tooth, and in the process of the retraction of the teeth in the anterior tooth area, the overall movement of the teeth can be facilitated, the subsequent orthodontic process of the righting tooth shaft is avoided or reduced, and thus the orthodontic efficiency is improved. BRIEF DESCRIPTION OF DRAWINGS

[0017] One or more embodiments are exemplarily illustrated by the pictures in the drawings corresponding thereto, and the exemplarily illustrations do not constitute a limitation on the embodiments, the elements with the same reference numerals in the drawings represent similar elements, and the drawings in the drawings do not constitute a proportional limitation unless specially stated.

[0018] Figure 1 is a structural schematic view of the orthodontic system in the embodiment one of the application;

[0019] Figure 2 is Figure 1 is a structural schematic view of the orthodontic system in the embodiment one of the application after the assembly of the elastic member;

[0020] Figure 3 is a structural schematic view of the mounting platform in the embodiment one of the application;

[0021] Figure 4 is a structural schematic view of a first tooth receiving part in the embodiment one of the application;

[0022] Figure 5 is a structural schematic view of another first tooth receiving part in the embodiment one of the application;

[0023] Figure 6 is a structural schematic view of a kind of orthodontic system in the embodiment one of the application;

[0024] Figure 7 is a structural schematic diagram of another kind of orthodontic system in Embodiment One of the present application;

[0025] Figure 8 is a rear view schematic diagram of a second tooth receiving portion in Embodiment One of the present application;

[0026] Figure 9 is a structural schematic diagram of another kind of orthodontic system in Embodiment One of the present application;

[0027] Figure 10 is a structural schematic diagram of an orthodontic system in Embodiment Two of the present application;

[0028] Figure 11 is a structural schematic diagram of another kind of orthodontic system in Embodiment Two of the present application. DETAILED DESCRIPTION

[0029] In order to make the objectives, technical solutions and advantages of the embodiments of the present application clearer, the various embodiments of the present application will be described in detail below with reference to the accompanying drawings. However, those skilled in the art can understand that, in the various embodiments of the present application, many technical details are presented in order to make the reader better understand the present application. However, the technical solutions claimed by the present application can be implemented even without these technical details and based on various changes and modifications of the following embodiments. The division of the following various embodiments is for the convenience of description, and should not constitute any limitation on the specific implementation of the present application, and the various embodiments can be combined and referenced with each other on the premise of not contradicting each other.

[0030] The "back tooth region" mentioned in the various embodiments of the present application is defined according to the classification of teeth in the 2nd edition of "Introduction to Oral Medicine" published by Peking University Medical Publishing House, pages 36-38, including premolars and molars, which are teeth 4-8 shown in FDI marking method, and the teeth in the front tooth region are teeth 1-3 shown in FDI marking method. The teeth in the front tooth region include central incisors, lateral incisors and canines. In addition, for teeth in the deciduous tooth stage, the "back tooth region" is defined according to the classification of deciduous teeth in the 2nd edition of "Introduction to Oral Medicine" published by Peking University Medical Publishing House, pages 40-41, including three types of deciduous incisors, deciduous canines and deciduous molars, among which, the deciduous incisors include deciduous central teeth and deciduous lateral incisors, and the deciduous molars include the first deciduous molar and the second deciduous molar.

[0031] The shell-shaped body is provided with cavities for accommodating multiple teeth, and is divided into a lingual surface and a labial surface, a mesial surface and a distal surface. Among them, the "lingual surface" is according to the naming of the crown surface in the "Introduction to Oral Medicine" published by Peking University Medical Publishing House, 2nd edition, pages 35-36. The labial surface and the buccal surface of the anterior tooth crown are close to the lips, and the buccal surface of the posterior tooth crown is close to the cheek. The lingual surface of the anterior tooth and the posterior tooth crown close to the tongue is collectively referred to as the lingual surface. The mesial surface and the distal surface are the two surfaces of the crown adjacent to the adjacent teeth, collectively referred to as the adjacent surface. The end closer to the midline of the surface is called the mesial end, and the end farther away from the midline of the surface is called the distal end.

[0032] One of the technical solutions protected by the present application is a closing tooth gap orthodontic system for wearing on the upper jaw after tooth extraction, comprising a first tooth receiving part for wrapping the teeth in the anterior tooth area and a second tooth receiving part for wrapping the teeth in the posterior tooth area. The second tooth receiving part comprises a first shell-shaped body corresponding to the left side of the posterior tooth area and a second shell-shaped body corresponding to the right side of the posterior tooth area, and a palate connecting part connected to the lingual side edge of the first shell-shaped body and the lingual side edge of the second shell-shaped body. The lingual side of the palate connecting part is provided with a fixing part for suspending an elastic member. The first tooth receiving part or the tooth surface of the corresponding teeth of the first tooth receiving part is provided with a pulling part. When worn, the left mesial end of the first tooth receiving part and the mesial end of the first shell-shaped body are located on both sides of the left gap, and the right mesial end of the first tooth receiving part and the mesial end of the second shell-shaped body are located on both sides of the right gap. When the two ends of the elastic member are suspended on the pulling part and the fixing part respectively, the teeth wrapped by the first tooth receiving part move in the direction of the second tooth receiving cavity. The technical solution in the present application is mainly aimed at the anterior tooth area with multiple teeth. The technical solution protected by the present application uses the shell-shaped body to bind the teeth that need to be retracted in the anterior tooth area as a whole, and at the same time binds the teeth in the posterior tooth area into a whole through the second tooth receiving part as the whole anchorage in the process of retraction of the anterior tooth area. Further, it effectively improves the anchorage force, avoids the problems of discontinuous force application, insufficient anchorage, low treatment efficiency and treatment failure in the prior art. The technical solution in the present application has the advantages of comfort and beauty of invisible orthodontic treatment, and can realize the whole binding of all teeth that need to be retracted in the anterior tooth area through the first tooth receiving part and continuously and stably apply traction force to them, thereby improving the treatment efficiency.

[0033] The embodiments in the present application will be described below in conjunction with the drawings.

[0034] Example 1

[0035] Reference Figure 1 and Figure 2As shown, the orthodontic system protected by the present embodiment is used on the maxillary dentition with gaps after tooth extraction, and includes a first tooth receiving part 11 for wrapping the teeth in the anterior region and a second tooth receiving part for wrapping the teeth in the posterior region. Here, the first tooth receiving part 11 mainly wraps all the teeth in the anterior region that need to be moved inward in the treatment plan, and these teeth are consecutive teeth. For example, if the extracted teeth are the upper 4 teeth on both sides, the teeth that need to be moved inward in the treatment plan are the 3-3 teeth, and the first tooth receiving part 11 needs to wrap these 6 consecutive teeth, which can be moved as a whole during the movement. Alternatively, if the extracted teeth are the upper 3 teeth on both sides, similarly, the teeth that need to be moved inward in the treatment plan are the 2-2 teeth, and the first tooth receiving part 11 wraps them as a whole. The second tooth receiving part includes a first shell-shaped body 21 corresponding to the left part of the posterior teeth, a second shell-shaped body 22 corresponding to the right part of the posterior teeth, and a palatal connecting part 23 connected to the lingual edge of the first shell-shaped body 21 and the lingual edge of the second shell-shaped body 22. In order to improve the stability of the anchoring force, the first shell-shaped body 21 and the second shell-shaped body 22 wrap all the erupted teeth on the left and right sides of the posterior region, respectively, and optionally, under the premise of not compressing the gums, the buccal side of the first shell-shaped body 21 and the second shell-shaped body 22 can extend to cover part of the gums. When worn, saliva is located between the gums and the diaphragm, forming a certain sealing effect, enhancing the retention force between the second tooth receiving part and the teeth, and thus the anchoring force provided by the second tooth receiving cavity binding the posterior teeth as a whole is stronger. The palatal connecting part 23 has a fixing part 231 on the lingual side for suspending an elastic member 3, and the first tooth receiving part 11 has a pulling part 111. When worn, the left distal end of the first tooth receiving part 11 and the mesial end of the first shell-shaped body 21 are located on the left side of the gap, and the right distal end of the first tooth receiving part 11 and the mesial end of the second shell-shaped body 22 are located on the right side of the gap. When the two ends of the elastic member 3 are suspended on the pulling part 111 and the fixing part 231 respectively, the teeth wrapped by the first tooth receiving part 11 move in the direction of the second tooth receiving cavity.

[0036] In some embodiments, the first tooth receiving part 11 has a pulling part 111, which can be integrally formed with the first tooth receiving part 11, protruding outward from part of the surface of the first tooth receiving part 11. Specifically, referring to Figure 3As shown, the first tooth receiving part 11 is provided with a mounting platform 121 corresponding to the pulling part 111, which is formed by protruding from the surface of the first tooth receiving part 11 in the distal direction. Since the tooth receiving cavity in the first tooth receiving part 11 basically fits the patient's teeth after being worn, the design of the mounting platform 121 can well avoid the influence of the pulling part 111 on the teeth after being installed, and different orientations can also be set through the mounting platform 121 to change the direction of the pulling part 111 after being installed, avoiding the inaccuracy caused by manually bonding different directions of the pulling part 111 during clinical operation.

[0037] Preferably, the pulling part 111 is a solid structure, so that it is not easy to deform during traction and can stably apply traction. Such a first tooth receiving part 11 with a solid structure pulling part 111 can be directly manufactured by 3D printing technology. Of course, it is conceivable that the pulling part 111 and the first tooth receiving part 11 can also be designed in a split body, and the doctor will bond the pulling part 111 made of metal, ceramic or PC material on the surface of the first tooth receiving part 11 when needed, or the pulling part 111 can also be fixed on the mounting platform 121 by clamping. In some cases, in order to better achieve traction, the length of the pulling part is between 1cm and 3cm.

[0038] In some embodiments, when the current teeth need to be moved inward to the distal direction and to the buccal direction to increase the width of the anterior tooth area dental arch, the two distal ends of the first tooth receiving part 11 do not wrap the distal side surface of the corresponding teeth, so as to reduce the resistance of the first tooth receiving part 11 to the transverse movement of the corresponding teeth during the treatment. Figure 4 As shown, in one embodiment, the first tooth receiving part 11 has a plurality of tooth receiving cavities, wherein the tooth receiving cavities 112 corresponding to the two distal ends of the first tooth receiving part 11 do not have distal end surfaces, i.e. the distal ends of the tooth receiving cavities 112 corresponding to the two distal ends of the first tooth receiving part 11 are hollow 11a. Alternatively, Figure 5 As shown, in another embodiment, the distal end surface 11b of the tooth receiving cavity 112 corresponding to the two distal ends of the first tooth receiving part 11 is arranged at a distance from the distal side surface of the corresponding teeth, i.e. the distal end surface 11b of the tooth receiving cavity 112 corresponding to the two distal ends of the first tooth receiving part 11 does not contact the distal side surface of the corresponding teeth and has a certain gap when worn. In order to provide more movement space for the teeth, the buccal side surface of the tooth receiving cavity corresponding to the two distal ends of the first tooth receiving part 11 can also be arranged at a distance from the buccal side surface of the corresponding teeth.

[0039] In some embodiments, referring to Figure 1As shown, the pulling part 111 is arranged on the lingual side, specifically, in an embodiment, the mounting platform 121 is located on the lingual side of the first tooth receiving part 11, and further, in order to provide a pulling force that is easier for the tooth root to move as a whole, the mounting platform 121 is arranged closer to the gum, which is designed to make the action point of the pulling force closer to the impedance center of the tooth.

[0040] Further preferably, referring to Figure 6 As shown, the lingual side of the first tooth receiving part 11 can extend to the lingual gum, and the pulling part 111 is arranged at the gum, so as to further make the action point of the pulling force closer to the impedance center of the tooth, and in the process of pulling, the tooth can move as a whole, and the lingual side problem does not occur excessively.

[0041] In some embodiments, the number of pulling parts 111 is 2, 4 or 6, referring to Figure 7 As shown, the number of pulling parts is 6, and the pulling parts 111 are arranged on the tooth receiving cavities corresponding to the same number teeth on the left and right sides, for example, when the number of pulling parts 111 is 2, the pulling parts 111 can be located on the tooth receiving cavities corresponding to the third teeth on the left and right sides in the first tooth receiving part 11, or the plurality of pulling parts 111 can be symmetrically arranged about the dental midline. The advantage of such arrangement is that the force applied to the teeth on both sides is uniform during the process of retraction, and the teeth will not deviate during the movement due to excessive unilateral force. Preferably, in order to make the teeth in the anterior region move more effectively and quickly, the pulling parts 111 can be arranged for all the teeth that need to be moved.

[0042] In some embodiments, referring to Figure 8 As shown, the palatal connecting part 23 is an arch-shaped structure matching the shape of the hard palate, and when worn, the palatal connecting part 23 fits the shape of the hard palate. The advantage of such arrangement is that the arch-shaped palatal connecting part 23 can reduce the pressure on the tongue, and improve the comfort during the process of correction.

[0043] In some embodiments, the number of fixing parts 231 is even, and the plurality of fixing parts 231 are symmetrically arranged about the dental midline. The lingual surface of the palatal connecting part 23 is provided with 2-6 fixing parts 231, and the number can correspond to the number of pulling parts 111. The fixing parts 231 and the pulling parts 111 are symmetrically distributed on both sides of the dental midline, to ensure that the bilateral pulling forces are balanced. Further preferably, one or more of the pulling parts 111 on one side of the dental midline are respectively suspended on the fixing parts 231 on the same side through the elastic members 3. Such arrangement can ensure that the elastic members 3 do not cross, and the angle between the direction of the pulling force and the direction of the dental midline is small, so as to ensure that the pulling force can act more effectively on the direction in which the tooth needs to move. In an embodiment, referring to Figure 9As shown, the front teeth in the anterior region 6 need to be moved, and the pulling part 111 is arranged on the lingual side of the 6 teeth, and the number is also 6. The number of the fixed part 231 is 2, and the two fixed parts 231 are symmetrically arranged about the dental midline P-P'. The three traction parts on one side of the dental midline P-P' are connected to the fixed part 231 on the same side through three elastic members 3, respectively. The two symmetrically arranged fixed parts 231 can not only ensure the balance of the bilateral traction force, but also the six pulling parts 111 can make the six teeth obtain effective pulling force, which can improve the moving efficiency of the teeth.

[0044] In some embodiments, the buccal side of the first tooth receiving part can also be provided with a pulling part. After wearing, the pulling part on the buccal side cooperates with the buccal side of the anchorage nail in the patient's mouth to provide a buccal side pulling force. This design can simultaneously apply a pulling force on the lingual side and the buccal side, thereby improving the moving efficiency of the teeth wrapped by the first tooth receiving part.

[0045] Embodiment two

[0046] Reference Figure 10 and Figure 11 As shown, the main difference between the present embodiment and embodiment one is that the pulling part 111 of the present embodiment is arranged on the tooth surface. This arrangement can more directly apply force to the tooth and has higher efficiency of the pulling force. Specifically, the pulling part 111 is arranged on the lingual side of the tooth wrapped by the first tooth receiving part 11. If more effective traction force is needed, the pulling part 111 can be arranged on the lingual side of all the teeth that need to be moved inward. The pulling part 111 can be a lingual side buckle or a metal bracket commonly used in the field of orthodontics, which is fixed on the tooth surface by bonding.

[0047] In some embodiments, as shown in Figure 10 , the lingual side of the first tooth receiving part 11 corresponds to the incisal third of the covered tooth. The pulling part 111 is arranged in the area close to the gum of the tooth on the lingual side, and the pulling part 111 does not contact the first tooth receiving part 11 when worn. Figure 11 In other embodiments, as shown in Figure 11 , compared with the above-mentioned embodiments, in order to improve the wrapping of the first tooth receiving part 11 to the tooth, the lingual side of the first tooth receiving part 11 is provided with an opening structure 111a at the position of the pulling part 111. When worn, the pulling part 111 passes through the opening structure and does not contact the opening structure 111a. It is further preferred that, as shown in

[0048] It should be explained that the above embodiments can be freely combined to form different new embodiments according to the needs without causing contradictions, and the embodiments formed after the combination are within the protection scope of the present application, and are not described here in order to save the length of the application text.

[0049] The above is only the preferred embodiment of the present application, and it should be pointed out that for ordinary skilled in the art, without departing from the principles of the present application, can make a number of improvements and refinements, these improvements and refinements should also be considered within the scope of the present application.

[0050] Similarly, the above is only a specific embodiment of the present application, but the protection scope of the present application is not limited to this, any skilled in the art within the scope of the present application disclosed technology, can easily think of changes or replacement, should be covered within the scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. An orthodontic system for closing interdental spaces, worn on the maxillary dentition after tooth extraction to create spaces, characterized in that, The device includes a first tooth-receiving part for wrapping teeth in the anterior region and a second tooth-receiving part for wrapping teeth in the posterior region. The second tooth-receiving part includes a first shell-shaped body corresponding to wrapping the left portion of the posterior teeth and a second shell-shaped body corresponding to wrapping the right portion of the posterior teeth, as well as a palatal connecting part connected to the lingual edges of the first and second shell-shaped bodies. The lingual surface of the palatal connecting part is provided with a fixing part for suspending an elastic element. The lingual surface of the first tooth-receiving part or the lingual surface of the tooth corresponding to the first tooth-receiving part is provided with a pulling part. When worn, the distal left end of the first tooth-receiving part and the mesial end of the first shell-shaped body are located on both sides of the left gap, and the distal right end of the first tooth-receiving part and the mesial end of the second shell-shaped body are located on both sides of the right gap. When the two ends of the elastic element are suspended on the pulling part and the fixing part respectively, the tooth wrapped by the first tooth-receiving part moves in the direction of the second tooth-receiving part.

2. The orthodontic system according to claim 1, characterized in that, The two distal ends of the first tooth receiving portion do not cover the distal surface of the corresponding tooth.

3. The orthodontic system according to claim 2, characterized in that, The first tooth receiving portion has multiple tooth receiving cavities, wherein the tooth receiving cavities corresponding to the two distal ends of the first tooth receiving portion do not have distal end surfaces, or the distal end surfaces of the tooth receiving cavities corresponding to the two distal ends of the first tooth receiving portion are spaced apart from the distal surface of the corresponding tooth.

4. The orthodontic system according to claim 1, characterized in that, When the traction part is placed on the tooth surface, the lingual side of the first tooth receiving part covers one-third of the incisal portion of the tooth.

5. The orthodontic system according to claim 1, characterized in that, When the traction part is placed on the tooth surface, the lingual side of the first tooth receiving part has an opening structure corresponding to the position of the traction part.

6. The orthodontic system according to claim 1, characterized in that, When the traction part is disposed on the first tooth receiving part, the first tooth receiving part is provided with a mounting platform for the traction part, and the mounting platform is formed by protruding from the surface of the first tooth receiving part toward the distal tooth.

7. The orthodontic system according to claim 1, characterized in that, The palatal connector is an arched structure that matches the shape of the hard palate.

8. The orthodontic system according to claim 1, characterized in that, The number of the traction parts is 2, 4 or 6, wherein multiple traction parts are set to the same tooth number, or multiple traction parts are set symmetrically about the tooth midline.

9. The orthodontic system according to claim 1 or 8, characterized in that, The number of the fixing parts is even, and the fixing parts are symmetrically arranged along the midlines of the associated teeth.

10. The corrective system according to claim 9, characterized in that, One or more of the traction portions on one side of the dental midline are respectively suspended from the fixing portions on the same side by elastic members.

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