Shell-shaped orthodontic appliance, orthodontic system and shell-shaped dental instrument

Abstract

The embodiment of the utility model provides a shell-shaped appliance for enhancing the deformation resistance of a lug boss, an orthodontic system and a shell-shaped dental instrument. The shell-shaped appliance comprises a shell-shaped body used for containing teeth, the shell-shaped body is of an integrally-formed structure, and the shell-shaped body is provided with a protruding part for reconstructing the occlusal position of the upper jaw and the lower jaw in a protruding mode in the occlusal direction of a rear tooth area. A sealing part is arranged on the inner surface, close to the contour edge of the tooth jaw where the shell-shaped body is located, of the protruding part, and in the occlusion state, the sealing part is attached to the occlusal surface, corresponding to the teeth, of the protruding part so that the interior of the protruding part can be in a sealed state. Therefore, the situation that the protruding part is prone to deformation due to stress concentration is reduced, the anti-pressure ability of the protruding part is improved, and the accuracy and stability of the correction effect are ensured.

Description

Technical Field

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

[0002] Since the development of invisible dental braces, they have been chosen by more and more people due to their advantages of being comfortable to wear, easy to remove, and beautiful. With the continuous improvement of invisible braces technology, functional invisible braces have also appeared in people's field of vision, such as the advent of invisible single-jaw plate braces or invisible Twin-Block braces. Among them, the invisible single-jaw plate braces can open the bite while flattening the SPEE curve and treating mild mandibular retrusion cases by designing a raised structure in the posterior teeth area; the invisible Twin-Block braces guide the mandibular protrusion through the mesiodistal bevels of the two raised jaw pads when the patient bites. The reverse invisible Twin-Block braces guide the mandibular retrusion through the mesiodistal bevels of the two raised jaw pads when the patient bites.

[0003] At present, most of the existing invisible single-jaw braces and invisible Twin-Block braces are molded by die-casting, and the protruding jaw pads are mostly hollow structures. Therefore, during the use of the patient, on the one hand, the jaw pads will be deformed after multiple bites due to insufficient rigidity or insufficient support. If the patient continues to use the deformed braces, it will lead to: (1) insufficient correction force, unable to reach the preset bite position, and subsequent correction steps cannot proceed normally; (2) the direction of the correction force will be changed, and the unexpected force will cause the teeth to move in an unexpected direction, and finally destroy the entire correction plan. In this case, the correction cost will increase and the treatment cycle will be prolonged. At the same time, while the patient is waiting for the new invisible braces to be made, due to the interruption of treatment, the teeth are not constrained by the corrective force and may move unexpectedly. The subsequent invisible braces will not be able to match the teeth that have moved, which may eventually lead to the restart of the correction. Furthermore, due to the generation of unexpected forces, during use, the jaw pads may slide in the buccal and lingual directions, and the upper and lower jaws may not be able to accurately reach the preset occlusal position, which may cause the problem of jaw deviation.

[0004] Therefore, it is of great significance to study a dental device that has the comfort and convenience of invisible braces without reducing the correction strength of functional braces. Utility Model Content

[0005] The purpose of the embodiments of the present application is to provide a shell-shaped orthodontic appliance, an orthodontic system and a shell-shaped dental instrument with enhanced anti-deformation capability of a protruding portion.

[0006] To achieve the above-mentioned purpose, an embodiment of the present application provides a shell-shaped orthodontic appliance, comprising a shell-shaped body for accommodating teeth, wherein the shell-shaped body is an integrally formed structure, and the shell-shaped body is provided with a protruding portion on the occlusal surface of the posterior tooth area toward the jaw direction for reconstructing the occlusal position of the upper and lower jaws, and the inner surface of the protruding portion close to the contour edge of the jaw where the shell-shaped body is located is provided with a sealing portion, and in the occlusal state, the sealing portion is in contact with the occlusal surface of the tooth corresponding to the protruding portion to form a sealed state inside the protruding portion.

[0007] Preferably, the sealing portion is an elastic layer arranged at the edge of the inner surface contour of the protrusion adjacent to the jaw.

[0008] Preferably, in the occlusal state, a side surface of the elastic layer adjacent to the occlusal surface of the corresponding tooth matches the occlusal surface of the corresponding tooth in a concave-convex manner.

[0009] Preferably, when the interior of the raised portion is in a sealed state, the interior of the raised portion is filled with gas and / or liquid.

[0010] Preferably, the inner surface contour edge of the raised portion adjacent to the jaw is a curve that matches the shape of the tooth occlusal surface at the corresponding position of the raised portion; or, the inner surface contour edge of the raised portion adjacent to the jaw is a straight line in the same plane.

[0011] Preferably, when the inner surface contour edge is a curve, the sealing portion is an elastic layer coated at the inner surface contour edge; or, when the inner surface contour edge is a straight line, the sealing portion is an elastic sealing strip installed at the inner surface contour edge.

[0012] Preferably, the elastic sealing strip has a mounting groove having a shape matching that of the edge of the inner surface contour, and the mounting groove and the edge of the inner surface contour are in interference fit.

[0013] Preferably, at least one tooth receiving cavity in the posterior tooth region of the shell-like body corresponds to one or more protrusions.

[0014] Preferably, the width of the edge of one of the raised portions close to the jaw in the buccolingual direction is smaller than the width of the teeth at the corresponding position in the buccolingual direction, or, the width of the outer edges of multiple raised portions close to the jaw in the buccolingual direction is smaller than the width of the teeth at the corresponding position in the buccolingual direction.

[0015] Preferably, the buccolingual width of the outer edge of one of the raised portions close to the jaw or the buccolingual width of the outer edges of multiple raised portions is 0.6-0.8 times the buccolingual width of the teeth at corresponding positions.

[0016] Preferably, the protrusion is arranged in the area corresponding to the tooth receiving cavity for receiving teeth No. 4, 5 and 6.

[0017] Preferably, the raised portion covers at least two tooth receiving cavities.

[0018] Preferably, the length of the protrusion in the mesiodistal direction is greater than or equal to 15 mm and less than or equal to 25 mm.

[0019] Another embodiment of the present application provides a correction system, comprising a first shell-shaped appliance and a second shell-shaped appliance corresponding to different correction stages, the first shell-shaped appliance and the second shell-shaped appliance are respectively the shell-shaped appliances described in any one of the above items, and the first protrusion in the first shell-shaped appliance and the second protrusion in the second shell-shaped appliance have different protrusion heights toward the opposite jaw or are located in different positions.

[0020] Another embodiment of the present application provides a shell-shaped dental device, comprising a first shell-shaped body that at least partially accommodates maxillary teeth and a second shell-shaped body that at least partially accommodates mandibular teeth, the first shell-shaped body being a shell-shaped orthodontic device as described in any one of the above; the second shell-shaped body having an occlusal surface in the posterior tooth area protruding toward the opposite jaw and having a fourth convex portion that cooperates with the third convex portion in the first shell-shaped body to move the mandible in the sagittal direction; when the shell-shaped dental device is worn, when the mesial surface of the third convex portion interacts with the distal surface of the fourth convex portion, the mandible moves forward to a target occlusal position.

[0021] The shell-shaped orthodontic appliance, the orthodontic system and the shell-shaped dental instrument provided by the utility model have at least the following beneficial effects compared with the prior art:

[0022] The various embodiments in the present application solve functional problems such as mandibular retraction, deep overbite, and deep overjet through the structure of the raised portion. In addition, a sealing portion is provided on the edge of the inner surface contour of the raised portion adjacent to the jaw. When worn, in the occlusal state, the sealing portion is in close contact with the occlusal surface of the teeth corresponding to the raised portion to form a sealed state inside the raised portion, thereby reducing the stress concentration and easy deformation of the raised portion and increasing the compression resistance of the raised portion. Therefore, in the various embodiments in the present application, the raised portion is in a sealed state through the sealing portion, so that the support force of the raised portion on the upper and lower jaws in the vertical direction and the anti-deformation ability in all directions are enhanced, ensuring the accuracy and stability of the correction effect.

[0023] The present application also provides a correction system, including N groups of shell-shaped dental instruments, which have a geometric shape that gradually repositions the teeth from an initial position to a target correction position. During the entire correction process, the heights of the first protrusion and the second protrusion gradually decrease as the correction process progresses, and the upper and lower jaw positions are gradually adjusted. In addition, while adjusting the upper and lower jaw positions, the N groups of shell-shaped dental instruments also correct the teeth, thereby achieving simultaneous correction and correction.

[0024] The present application also provides a shell-shaped dental instrument, comprising a first shell-shaped body that at least partially accommodates maxillary teeth and a second shell-shaped body that at least partially accommodates mandibular teeth. The third protrusion in the first shell-shaped body and the fourth protrusion in the second shell-shaped body interact with each other to adjust the sagittal and vertical positional relationship between the upper and lower jaws, and align the upper and lower jaw teeth to achieve simultaneous orthopedic treatment. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] One or more embodiments are exemplarily described by pictures in the corresponding drawings, and these exemplified descriptions do not constitute limitations on the embodiments. Elements with the same reference numerals in the drawings represent similar elements, and unless otherwise stated, the figures in the drawings do not constitute proportional limitations.

[0026] Figure 1 is a schematic diagram of the structure of a shell-shaped appliance in some embodiments of the present application;

[0027] Figure 2 is a schematic diagram of the structure of a shell-shaped appliance in some other embodiments of the present application;

[0028] Figure 3 is a schematic diagram of the structure of a shell-shaped appliance in some other embodiments of the present application;

[0029] Figure 4 is a schematic diagram of the structure of a shell-shaped appliance in some other embodiments of the present application;

[0030] Figure 5 is a schematic diagram of the structure of a shell-shaped appliance in some other embodiments of the present application;

[0031] Figure 6 is a schematic diagram of the structure of a shell-shaped appliance in some other embodiments of the present application;

[0032] Figure 7 is a schematic diagram of the structure of the dental jaw model in some embodiments of the present application;

[0033] Figure 8 is a schematic diagram of the structure of a shell-shaped appliance in some other embodiments of the present application;

[0034] Fig. 9 is a schematic diagram of the structure of a shell-shaped appliance in some other embodiments of the present application;

[0035] Fig.10 is a schematic diagram of the structure of a shell-shaped appliance in some other embodiments of the present application;

[0036] Fig.11 is a schematic diagram of the structure of a shell-shaped appliance in some other embodiments of the present application;

[0037] Fig.12 is a schematic diagram of the structure of the correction system in some embodiments of the present application;

[0038] Fig.13 It is a schematic diagram of the structure of a shell-shaped dental instrument in some embodiments of the present application. DETAILED DESCRIPTION

[0039] To make the purpose, technical scheme and advantages of the embodiments of the present application clearer, each embodiment of the present application will be described in detail below in conjunction with the accompanying drawings. However, it will be appreciated by those skilled in the art that in each embodiment of the present application, many technical details are proposed in order to enable 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 scheme claimed in the present application can also be implemented. The division of the following embodiments is for the convenience of description, and the specific implementation of the present application should not constitute any limitation, and the various embodiments can be combined with each other and referenced to each other without contradiction.

[0040] The "posterior tooth area" mentioned in each embodiment of the present application is defined according to the classification of teeth in the second edition of "Introduction to Stomatology" published by Peking University Medical Press, pages 36-38, including premolars and molars, which are displayed as teeth 4-8 by the FDI marking method, and the teeth 1-3 in the anterior tooth area by the FDI marking method. The teeth in the anterior tooth area include central incisors, lateral incisors, and canines. In addition, for the teeth in the deciduous tooth stage, the "posterior tooth area" is defined according to the classification of deciduous teeth in the second edition of "Introduction to Stomatology" published by Peking University Medical Press, pages 40-41, including three categories: deciduous incisors, deciduous canines, and deciduous molars, among which deciduous incisors include deciduous central teeth and deciduous lateral incisors, and deciduous molars include first deciduous molars and second deciduous molars.

[0041] The shell-shaped orthodontic appliance, orthodontic system and shell-shaped dental instrument in each embodiment of the present application can realize simultaneous orthodontic treatment, and in the process of realizing functional treatment, solves the problem in the prior art that the jaw pad structure is deformed and bitten due to excessive bite force of the patient or wear during use, thereby affecting the correction effect.

[0042] Therefore, in order to solve the above problems, the present application provides a shell-shaped appliance 1, referring to Figures 1 to 6As shown, the embodiment of the present application provides a shell-shaped orthodontic appliance 1, comprising a shell-shaped body 11 for accommodating teeth, the shell-shaped body 11 is an integrally formed structure, the shell-shaped body 11 is provided with a protrusion 12 for reconstructing the occlusal position of the upper and lower jaws on the occlusal surface of the posterior tooth area toward the jaw, the inner surface of the protrusion 12 close to the contour edge of the jaw where the shell-shaped body 11 is located is provided with a sealing portion 121, in the occlusal state, the sealing portion 121 is in contact with the occlusal surface of the tooth corresponding to the protrusion 12 to form a sealed state inside the protrusion 12. In the sealed state, the overall anti-deformation ability of the protrusion 12 is enhanced, thereby effectively solving the deformation problem of the protrusion 12 caused by local stress concentration during use, such as during the occlusion process.

[0043] In some embodiments, reference Figure 2 and Figure 3 As shown, the sealing portion 121 is an elastic layer arranged at the edge E of the inner surface contour of the protrusion 12 adjacent to the jaw. During the occlusion process, the elastic layer will undergo elastic deformation, thereby fitting tightly with the occlusal surface of the tooth where the protrusion 12 is located, so that the internal space A of the protrusion 12 forms a sealed space. In some embodiments, the dimensions of the protrusion 12 in the buccal-lingual direction and the mesio-distal direction are smaller than the dimensions of the tooth corresponding to the protrusion 12. Such a design allows the sealing portion 121 to be arranged near the contour edge of the jaw where the protrusion 12 is located, and it does not need to be designed with a larger size to effectively contact the corresponding tooth occlusal surface, so that a sealed space is formed inside the protrusion 12. For example, refer to Figure 4 As shown, the shell-shaped orthodontic appliance 1 is worn on the patient's maxillary dentition, and the raised portion 12 is arranged correspondingly at the position of tooth No. 6. The outer edge contour dimensions of the raised portion 12 adjacent to tooth No. 6 are smaller than the dimensions of the occlusal surface of tooth No. 6 in both the buccal-lingual direction and the mesio-distal direction.

[0044] In some embodiments, in the occlusal state, a side surface of the elastic layer adjacent to the occlusal surface of the corresponding tooth matches the occlusal surface of the corresponding tooth in a concave-convex manner. Figure 5 As shown, before the elastic layer itself is deformed, the shape of the surface 121a on the side adjacent to the corresponding tooth occlusal surface is concavely matched with the shape 121b of the corresponding tooth occlusal surface. The advantage of such a design is that the elastic layer is easier to fit closely with the tooth occlusal surface when biting, and no gap is generated between them, so that it is easier to achieve a sealed state.

[0045] In some embodiments, when the interior of the raised portion 12 is in a sealed state, the interior of the raised portion 12 is gas and / or liquid. Specifically, in some cases, the gas sealed inside the raised portion 12 is air; or, Figure 3As shown, the interior of the raised portion 12 is entirely sealed with liquid. In this case, the liquid may be the patient's saliva, or other liquids with a dental treatment function. In the case of entirely liquid, the anti-deformation ability of the raised portion 12 is optimal. At the same time, if it is other liquids with a dental treatment function, it can provide a treatment function on the basis of improving the anti-deformation ability. In other cases, refer to Figure 6 As shown, the inner space A of the raised portion 12 is partially gas and partially liquid or entirely liquid, and the liquid here can be saliva in the patient's mouth. Without special design, it is the most common situation that the raised portion is partially gas and partially liquid, and this sealed space can also increase the overall pressure resistance of the raised portion 12.

[0046] In some embodiments, the inner surface contour edge of the raised portion 12 adjacent to the jaw is a curve that matches the shape of the tooth occlusal surface at the corresponding position of the raised portion 12, that is, the shape of the inner surface contour edge of the raised portion 12 adjacent to the jaw matches the shape of the tooth occlusal surface at the corresponding position. In this case, the sealing portion 121 can be a gel layer coated on the inner surface contour edge of the raised portion 12 adjacent to the jaw. On the premise that the inner surface contour edge of the raised portion 12 adjacent to the jaw is a curve that matches the shape of the tooth occlusal surface at the corresponding position of the raised portion 12, the shape of the gel layer coated on the inner surface contour edge of the raised portion 12 also basically matches the shape of the tooth occlusal surface.

[0047] In some embodiments, the inner surface contour edge of the protrusion 12 adjacent to the jaw is a straight line in the same plane. Figure 7 As shown, in the process of manufacturing the orthodontic appliance by using the hot pressing film process, a mounting platform 21 for the raised portion 12 is provided at the position corresponding to the raised portion 12 on the dental model 2. In this manufacturing process, the raised portion 12 model can be reused, and the cost and material usage can be reduced. During the hot pressing film process, the inner surface contour edge of the raised portion 12 adjacent to the jaw is completely in contact with the surface of the mounting platform 21, so the inner surface contour edge of the raised portion 12 adjacent to the jaw is a straight line in the same plane. In this embodiment, reference Figure 8 As shown, the sealing portion 121 is an elastic sealing strip installed at the edge of the inner surface contour. The elastic sealing strip has a mounting groove 1211 that matches the shape of the inner surface contour edge of the protruding portion 12. The mounting groove 1211 and the inner surface contour edge are interference fit so that the elastic sealing strip will not fall off the shell-like body 11 during use. In order to further avoid the problem of the elastic sealing strip falling off, the mounting groove 1211 of the elastic sealing strip and the inner surface contour edge of the protruding portion 12 are fixed together by an adhesive.

[0048] In some embodiments, at least one tooth receiving cavity 111 in the posterior tooth region of the shell-shaped body 11 corresponds to one or more protrusions 12. Fig. 9 As shown, in one embodiment, a plurality of protrusions 12 correspond to one tooth receiving cavity 111, and the shell-shaped orthodontic appliance 1 can provide chewing ability during the wearing of the orthodontic appliance; in one embodiment, when one protrusion 12 corresponds to one tooth receiving cavity 111, refer to Figure 4 As shown, one protrusion 12 may correspond to only one tooth receiving cavity 111, or, as shown in FIG. Fig.10 As shown, one protrusion 12 may correspond to only a plurality of tooth receiving cavities 111. The above embodiment may be used according to different correction requirements.

[0049] In some embodiments, the width of the edge of one of the raised portions 12 close to the present jaw in the buccolingual direction is smaller than the width of the teeth at the corresponding position in the buccolingual direction, or the width of the outer edges of multiple raised portions 12 close to the present jaw in the buccolingual direction is smaller than the width of the teeth at the corresponding position in the buccolingual direction. In some embodiments, the width of the surface of the raised portion 12 close to the opposing jaw in the buccolingual direction is smaller than the width of the teeth at the corresponding position in the buccolingual direction. The advantage of such a design is that when the patient wears the shell-shaped orthodontic appliance 1, the outer edge of the raised portion 12 close to the opposing jaw can be fully supported on the occlusal surface of the teeth of the opposing jaw. In a preferred embodiment, during multiple verifications by the inventor of the present application, while ensuring that the raised portion 12 has sufficient width in the buccolingual direction and can ensure the function of vertical adjustment of the jaw position, the width of the surface of the raised portion 12 close to the opposing jaw in the buccolingual direction is 0.6-0.8 times the width of the teeth at the corresponding position in the buccolingual direction.

[0050] Likewise, in some embodiments, reference Figure 4 As shown, the width of the outer edge of the raised portion 12 close to the present jaw in the buccolingual direction is smaller than the width of the teeth in the buccolingual direction at the corresponding position. The advantage of such a design is that when the patient wears the shell-shaped orthodontic appliance 1, the lower outer edge of the raised portion 12 can be fully supported on the occlusal surface of the corresponding teeth of the jaw where the raised portion 12 is located. In a preferred embodiment, during multiple verifications by the inventor of the present application, while ensuring that the raised portion 12 has a sufficient width in the buccolingual direction and can ensure the function of vertical adjustment of the jaw position, the width of the outer edge of the raised portion 12 close to the present jaw in the buccolingual direction is 0.6-0.8 times the width of the teeth in the buccolingual direction at the corresponding position.

[0051] In some embodiments, the width of the surface of the raised portion 12 close to the opposing jaw in the buccolingual direction is 0.6-0.8 times the width of the teeth of the opposing jaw in the buccolingual direction at the corresponding position, and the width of the outer edge of the raised portion 12 close to the jaw in the buccolingual direction is 0.6-0.8 times the width of the teeth of the opposing jaw in the buccolingual direction at the corresponding position. The advantage of such a design is that the outer edge and the lower outer edge of the raised portion 12 close to the opposing jaw can provide support at the same time, thereby jointly providing a stable supporting force.

[0052] In some embodiments, reference Fig.11 As shown, the raised portion 12 is in the area corresponding to teeth 4, 5 and 6 in the posterior tooth area of ​​the shell-shaped appliance 1. Further preferably, the raised portion 12 covers at least two tooth positions. And the length L of the raised portion 12 in the mesiodistal direction is greater than or equal to 15 mm and less than or equal to 25 mm. When in use, the raised portion 12 can depress the teeth at the covering tooth position of the opposing jaw, so as to further flatten the patient's SPEE curve when treating cases of mandibular retrusion.

[0053] The present application also includes a correction system, which includes a first shell-shaped appliance 100 and a second shell-shaped appliance 200 corresponding to different correction stages, wherein the first shell-shaped appliance 100 and the second shell-shaped appliance 200 are respectively the shell-shaped appliance 1 described in the above embodiments, and the first shell-shaped appliance 100 and the second shell-shaped appliance 200 are shell-shaped appliances 1 worn on the same jaw, wherein the first protrusion 102 in the first shell-shaped appliance 100 and the second protrusion 202 in the second shell-shaped appliance 200 have inconsistent protrusion heights toward the opposite jaw or inconsistent positions.

[0054] In some embodiments, the protrusion height of the first protrusion 102 on the first shell-shaped appliance 100 in the direction of the opposing jaw and the protrusion height of the second protrusion 202 on the second appliance in the direction of the opposing jaw are set in association with the correction stage. For example, the correction stage corresponding to the second appliance is the subsequent stage of the correction stage corresponding to the first appliance. Fig.12 As shown, the protrusion heights of the first protrusion 102 and the second protrusion 202 set on the first shell-shaped appliance 100 in the direction of the jaw gradually decrease as the correction progresses. The advantage of this is that the dentition is gradually leveled to the target state. Specifically, as shown in the reference figure, the height H2 of the second protrusion 202 on the second shell-shaped appliance 200 is less than the height H1 of the first protrusion 102 in the first shell-shaped appliance 100.

[0055] The present application also includes a shell-shaped dental instrument, reference Fig.13As shown, it includes a first shell-like body 300 that at least partially accommodates the maxillary teeth and a second shell-like body 400 that at least partially accommodates the mandibular teeth, the first shell-like body 300 is the shell-like appliance 1 described in any one of the above-mentioned embodiments; the second shell-like body 400 is provided with a fourth protrusion 402 protruding toward the opposite jaw on the occlusal surface of the posterior tooth area, which cooperates with the third protrusion 302 in the first shell-like body 300 to move the mandible in the sagittal direction; when the shell-like dental instrument is worn, when the mesial surface of the third protrusion 302 interacts with the distal surface of the fourth protrusion 402, the mandible moves forward to the target occlusal position.

[0056] It should be noted that the above embodiments can be freely combined as needed to form different new implementation plans without causing any contradiction. The implementation plans formed after such combination are all within the protection scope of the present utility model. In order to save the length of the application text, they will not be described in detail here.

[0057] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications should also be regarded as the protection scope of the present invention.

[0058] Similarly, the above is only a specific implementation of the utility model, but the protection scope of the utility model is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed by the utility model, which should be included in the protection scope of the utility model. Therefore, the protection scope of the utility model should be based on the protection scope of the claims.

Claims

1. A shell-shaped orthodontic appliance, comprising a shell-shaped body for accommodating teeth, wherein the shell-shaped body is an integrally formed structure, characterized in that: The shell-like body is provided with a protruding portion on the occlusal surface of the posterior tooth area toward the jaw, and the protruding portion is provided with a sealing portion on the inner surface of the contour edge of the jaw where the shell-like body is located. In the occlusal state, the sealing portion is in contact with the occlusal surface of the tooth corresponding to the protruding portion to form a sealed state inside the protruding portion.

2. The shell-shaped appliance according to claim 1, characterized in that: The sealing portion is an elastic layer arranged at the edge of the inner surface contour of the protruding portion adjacent to the jaw.

3. The shell-shaped appliance according to claim 2, characterized in that: In the occlusal state, a side surface of the elastic layer adjacent to the occlusal surface of the corresponding tooth matches the occlusal surface of the corresponding tooth in a concave-convex manner.

4. The shell-shaped appliance according to claim 1 or 2, characterized in that: The inner surface contour edge of the protrusion adjacent to the present jaw is a curve that matches the shape of the tooth occlusal surface at the corresponding position of the protrusion; or, the inner surface contour edge of the protrusion adjacent to the present jaw is a straight line in the same plane.

5. The shell-shaped appliance according to claim 4, characterized in that: When the inner surface contour edge is a curve, the sealing portion is an elastic layer coated on the inner surface contour edge; or, when the inner surface contour edge is a straight line, the sealing portion is an elastic sealing strip installed on the inner surface contour edge.

6. The shell-shaped appliance according to claim 5, characterized in that: The elastic sealing strip has a mounting groove whose shape matches that of the edge of the inner surface contour, and the mounting groove and the edge of the inner surface contour are in interference fit.

7. The shell-shaped appliance according to claim 1, characterized in that: At least one tooth receiving cavity in the posterior tooth area of ​​the shell-like body corresponds to one or more protrusions.

8. The shell-shaped appliance according to claim 7, characterized in that: The width of the edge of one of the raised portions close to the jaw in the buccolingual direction is smaller than the width of the teeth at the corresponding position in the buccolingual direction, or the width of the outer edges of multiple raised portions close to the jaw in the buccolingual direction is smaller than the width of the teeth at the corresponding position in the buccolingual direction.

9. The shell-shaped appliance according to claim 8, characterized in that: The buccolingual width of the outer edge of one of the protrusions or the buccolingual width of the outer edges of multiple protrusions is 0.6-0.8 times the buccolingual width of the teeth at corresponding positions.

10. The shell-shaped appliance according to claim 9, characterized in that: The protrusion is arranged in the area corresponding to the tooth receiving cavity for receiving teeth No. 4, 5 and 6.

11. The shell-shaped appliance according to claim 10, characterized in that: The raised portion covers at least two tooth receiving cavities.

12. The shell-shaped appliance according to claim 11, characterized in that: The length of the protrusion in the proximal and distal directions is greater than or equal to 15 mm and less than or equal to 25 mm.

13. A correction system, comprising a first shell-shaped appliance and a second shell-shaped appliance corresponding to different correction stages, wherein the first shell-shaped appliance and the second shell-shaped appliance are respectively the shell-shaped appliances according to any one of claims 1 to 12, characterized in that: The first protrusion in the first shell-shaped appliance and the second protrusion in the second shell-shaped appliance have different protrusion heights toward the opposing jaw or are located at different positions.

14. A shell-shaped dental instrument, characterized in that: It comprises a first shell-like body which at least partially accommodates the maxillary teeth and a second shell-like body which at least partially accommodates the mandibular teeth, wherein the first shell-like body is a shell-like appliance as described in any one of claims 1 to 12; the second shell-like body is provided with a fourth protrusion on the occlusal surface of the posterior tooth area protruding toward the opposite jaw direction, which cooperates with the third protrusion in the first shell-like body to move the mandible in the sagittal direction; when the shell-like dental appliance is worn, when the mesial surface of the third protrusion interacts with the distal surface of the fourth protrusion, the mandible moves forward to the target occlusal position.

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