Shell-shaped dental instrument, tooth straightening system and design and manufacturing method thereof

Abstract

The present application provides a kind of shell dental instrument, including the first shell body of at least partial accommodation maxillary teeth and the second shell body of at least partial accommodation mandibular teeth, the first shell body is provided with the first protruding portion of adjusting the upper and lower jaw position relationship in the region between canine and molar in the direction of opposite jaw, the second shell body is provided with the second protruding portion of matching adjusting the upper and lower jaw position relationship in the region between canine and molar in the direction of opposite jaw;First reinforcing member is provided on the first protruding portion, second reinforcing member is provided on the second protruding portion, the outer surface of the first reinforcing member and the outer surface of second reinforcing member have concave-convex matching structure;When the first shell body and the second shell body interact, the first reinforcing member and the second reinforcing member relative sliding guide upper and lower jaw to the preset occlusal position, the present application also provides a kind of dental treatment system, dental instrument design method and preparation method.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of orthodontics, more precisely to the technical field of clear aligner orthodontics, and in particular to a shell-shaped dental appliance, a tooth treatment system, a method for designing a dental appliance and a method for manufacturing a dental appliance. BACKGROUND

[0002] Currently, in the field of orthodontic treatment, functional orthodontic treatment is a conventional treatment method for children and adolescents during the mixed dentition period and the replacement period. Twin-Block treatment is a conventional treatment method. Compared with the "flat guide" effect of the traditional functional appliance, the Twin-Block treatment transmits a certain occlusal force to the teeth and the jaw through two convex solid jaw pads, thereby achieving the purpose of adjusting the relative position of the upper and lower jaws.

[0003] Since the development of clear aligners, more and more people have chosen them because of their comfort, convenience, and aesthetic advantages. With the continuous improvement of clear aligner technology, functional clear aligners have also appeared in people's field of vision, such as the advent of clear Twin-Block appliances. Among them, the clear Twin-Block appliance guides the mandible to protrude through the mesial-distal inclined surface of the two convex jaw pads when the patient bites. The reverse clear Twin-Block appliance guides the mandible to retract through the mesial-distal inclined surface of the two convex jaw pads when the patient bites.

[0004] Currently, most existing clear Twin-Block appliances are formed by pressing a film, and the convex jaw pads are mostly hollow structures. In the process of use by the patient, on the one hand, the two jaw pads may deform after multiple bites due to insufficient rigidity, and if the patient continues to use the deformed clear Twin-Block appliance, it may result in: (1) insufficient correction force, which cannot achieve the preset occlusal position, and the subsequent correction steps cannot proceed normally; (2) the direction of the predetermined force will be changed, and the teeth will move in an unexpected direction due to unexpected forces, ultimately destroying the entire treatment plan. On the other hand, the two hollow structure convex jaw pads may be directly bitten by the patient during use and cannot be used continuously, at which time the patient needs to re-press the film to produce the clear aligner required at this step. In this case, it will result in an increase in treatment costs and a lengthening of the treatment period, and during the patient's waiting period for the production of new clear aligners, the teeth may move unexpectedly due to the interruption of treatment without the constraint of the appropriate correction force, and the subsequent clear aligners cannot match the teeth that have moved, which may ultimately result in the restart of the treatment. Furthermore, due to the existence of unpredictable unexpected forces, the jaw pads may slide in the buccal-lingual direction during use, and the upper and lower jaws cannot accurately reach the preset occlusal position, which may cause a malocclusion problem.

[0005] Therefore, it is of great significance to research a dental instrument that combines the comfort and convenience of clear aligners with the corrective power of functional orthodontics. Summary of the Invention

[0006] The technical problem solved by the present invention is to overcome the defects of the prior art and provide a shell-shaped dental instrument and orthodontic system with a jaw pad that is not easily deformed and has high orthodontic accuracy, as well as the design method and preparation method of the shell-shaped dental instrument.

[0007] The present invention solves the above-mentioned technical problems through the following technical solutions:

[0008] A shell-shaped dental instrument includes 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 has a first protrusion protruding in the region between the canines and molars, extending towards the opposing jaw, to guide and adjust the positional relationship between the maxilla and mandible. The second shell-shaped body has a second protrusion protruding in the region between the canines and molars, extending towards the opposing jaw, to cooperate in adjusting the positional relationship between the maxilla and mandible. A first reinforcing member is provided on the first protrusion, and a second reinforcing member is provided on the second protrusion. The outer surfaces of the first and second reinforcing members have a concave-convex matching structure. When the first and second shell-shaped bodies interact, the first and second reinforcing members slide relative to each other, guiding the maxilla and mandible to a preset occlusal position. The concave-convex matching structure of the first and second reinforcing members not only increases their contact stiffness by increasing their contact area but also allows for precise sliding guidance of the maxilla and mandible to the preset occlusal position, preventing unexpected deviations in the buccal-lingual direction.

[0009] Furthermore, the first protrusion has a first outer surface on its near-mid surface or far-mid surface, and the second protrusion has a second outer surface on its near-mid surface or far-mid surface. Meanwhile, the first reinforcing member is disposed on the first outer surface, and the second reinforcing member is disposed on the second outer surface.

[0010] Furthermore, when the first shell-shaped body interacts with the second shell-shaped body, the first reinforcing member and the second reinforcing member are located between the first protrusion and the second protrusion, and at the same time, the outer surface of the first reinforcing member and the outer surface of the second reinforcing member are in contact with each other.

[0011] Furthermore, when the first shell-shaped body interacts with the second shell-shaped body, the first protrusion guides the second protrusion to move in a proximal or distal direction. At the same time, the second protrusion moves to a preset position so that the first protrusion and the engagement surface on the second shell-shaped body are in stable contact.

[0012] Furthermore, when the first shell-shaped body interacts with the second shell-shaped body, the first reinforcing member slides back and forth in a given direction with reference to the second reinforcing member.

[0013] Furthermore, the straight line is parallel to the first outer surface of the first protrusion and the second outer surface of the second protrusion.

[0014] Furthermore, the outer surface of the first reinforcing member includes a protruding geometry, and the outer surface of the second reinforcing member forms a recessed geometry that matches the protruding geometry on the opposite outer surface of the first reinforcing member.

[0015] Furthermore, the outer surface of the second reinforcing member includes a protruding geometric shape, and the outer surface of the first reinforcing member forms a recessed geometric shape that matches the protruding geometric shape on the oppositely disposed outer surface of the first reinforcing member. The aforementioned protruding and recessed geometric shapes not only increase the stiffness of the first and second reinforcing members by increasing their surface area, but also improve the stability of the contact between the first and second protrusions, ensuring a stable corrective force during treatment and thus improving the corrective effect.

[0016] Furthermore, the surfaces of the convex geometry and the surfaces of the concave geometry are curved surfaces.

[0017] Furthermore, the cross-sections of the convex geometry and the concave geometry in the horizontal direction are polygons.

[0018] Furthermore, the maximum width of the cross-section of the convex geometry on the coronal plane is smaller than the minimum width of the cross-section of the concave geometry on the coronal plane. This creates a smaller gap between the convex and concave geometries, allowing for smoother relative sliding between the first and second reinforcing members, thereby reducing friction between them and improving their wear resistance.

[0019] Furthermore, the first reinforcing member and the first protrusion are integrally formed or independently formed; the second reinforcing member and the second protrusion are integrally formed or independently formed. The integral forming design not only reduces the number of processes but also improves processing efficiency, and the integrated design also ensures the stability of the connection. The independently formed separate design allows for flexible selection of the first reinforcing member and the first protrusion, improving not only the compatibility between the first reinforcing member and the first protrusion but also the flexibility and applicability of the orthodontic treatment.

[0020] Furthermore, when the first reinforcing member is integrally formed with the first protrusion, the wall thickness of the first reinforcing member is greater than or equal to the wall thickness of the first protrusion; when the second reinforcing member is integrally formed with the second protrusion, the wall thickness of the second reinforcing member is greater than or equal to the wall thickness of the second protrusion. Similarly, increasing the wall thickness can increase the stiffness of the first and second reinforcing members, and also increase their wear resistance.

[0021] Furthermore, when the first reinforcing member and the first protrusion are formed independently, the stiffness of the first reinforcing member is greater than or equal to the stiffness of the first protrusion; when the second reinforcing member and the second protrusion are formed independently, the stiffness of the second reinforcing member is greater than or equal to the stiffness of the second protrusion.

[0022] Furthermore, the first reinforcing member and the first protrusion are configured to be either non-removably fixedly connected or detachably fixedly connected; the second reinforcing member and the second protrusion are configured to be either non-removably fixedly connected or detachably fixedly connected. The detachable fixed connection allows for the replacement of different reinforcing members according to different orthodontic needs, thus addressing a wider range of orthodontic solutions.

[0023] Furthermore, the non-removable fixed connection is at least one of adhesive fixed connection, welded fixed connection, and riveted fixed connection.

[0024] Furthermore, the first protrusion extends from the cheek side of the first shell-shaped body to the tongue side of the first shell-shaped body on the inner surface of the interval; the second reinforcing member extends from the cheek side of the second shell-shaped body to the tongue side of the second shell-shaped body on the inner surface of the interval.

[0025] Furthermore, the first protrusion and the second protrusion both extend from the buccal side of the shell-shaped body to the lingual side of the shell-shaped body within the inner surface, including any one of the following extension methods: extending from the buccal surface, extending from the occlusal surface, extending from the lingual surface, extending from both the buccal and occlusal surfaces, extending from both the lingual and occlusal surfaces, and extending from both the buccal and lingual surfaces and the occlusal surface.

[0026] Furthermore, at least one reinforcing ridge is provided on at least one surface of the first protrusion and / or the second protrusion, including the buccal surface, lingual surface, mesial surface, and distal surface.

[0027] Furthermore, the reinforcing ridge and the first protrusion are integrally formed, and the reinforcing ridge and the second protrusion are integrally formed.

[0028] Furthermore, the reinforcing ridge is formed by protrusions or indentations of the buccal surface, lingual surface, mesial surface, and distal surface. Similarly, the formation of the reinforcing ridge can increase the surface area of ​​the protrusion, thereby increasing the stiffness of the protrusion.

[0029] Furthermore, when the reinforcing ridge is disposed on the near-mid surface or far-mid surface of the protrusion, the curvature of the outer surface of the reinforcing ridge is less than or equal to the curvature of the outer surface of the reinforcing member. The purpose is that the reinforcing ridge does not affect the stable contact between the first and second reinforcing members and does not change the size of the gap between the first and second reinforcing members.

[0030] The present invention also provides a dental orthodontic system comprising multiple sets of shell-shaped dental instruments, wherein the multiple sets of shell-shaped dental instruments include at least one set of shell-shaped dental instruments as described above.

[0031] Furthermore, the protrusion height of the first protrusion in the direction of the opposing jaw and the protrusion height of the second protrusion in the direction of the opposing jaw on the shell-shaped dental instruments corresponding to different orthodontic stages are set in relation to the orthodontic stage.

[0032] Furthermore, the mechanical parameters of the first reinforcing member of the first protrusion and the mechanical parameters of the second reinforcing member of the second protrusion on the various sets of shell-shaped dental instruments are modified according to the different orthodontic target parameters set for different orthodontic stages.

[0033] Furthermore, the change in the mechanical parameters includes a change in at least one of the following parameters: strength, hardness, stiffness, and elastic characteristics.

[0034] Compared with existing technologies, the present invention provides a shell-shaped dental instrument and orthodontic system. By providing mutually cooperating reinforcing members on the mesial and distal surfaces of the protrusions on the shell-shaped dental instrument, which contact and slide against each other, the rigidity of the protrusions is enhanced. Simultaneously, the reinforcing members also possess a sliding guiding function, significantly reducing or even avoiding unintended deviations in the buccal-lingual direction when the protrusions slide relative to each other to guide the mandible forward or retract. This allows the first and second reinforcing members to accurately guide the maxilla and mandible to a preset occlusal position when sliding relative to each other. The present invention can open the bite while precisely guiding the maxilla and mandible to the correct occlusal position without buccal-lingual sliding. Specifically, it can flatten the Spee curve and re-establish posterior tooth occlusion. The reinforcing members can improve the rigidity and / or hardness of the protrusions, preventing deformation and wear of the first and second protrusions during occlusion, thereby achieving better treatment results.

[0035] The present invention also provides a design method for a shell-shaped dental instrument, comprising the following steps:

[0036] Obtain the first initial digital model of the dental jaw;

[0037] In the region between the canines and molars of the first initial digital dental model, a first protrusion model is designed in the direction of the opposing jaw. A first reinforcing member model is designed on the mesial or distal surface of the first protrusion. Specifically, this includes obtaining the feature information of the first protrusion and the first reinforcing member. The feature information of the first protrusion includes the size and preset position of the first protrusion, and the feature information of the first reinforcing member includes the size, shape and preset position of the first reinforcing member.

[0038] Based on the first initial dental digital model, the first protrusion model, and the first reinforcing member model, a first dental digital model with a first protrusion and a first reinforcing member is generated;

[0039] Obtain the second initial digital model of the dental jaw;

[0040] In the region between the canine and molar in the second initial digital dental model, a second protrusion model is designed in the direction of the opposing jaw. A second reinforcing member model is designed on the mesial or distal surface of the second protrusion. Specifically, this includes obtaining the feature information of the second protrusion and the second reinforcing member. The feature information of the second protrusion includes the size and preset position of the second protrusion, and the feature information of the second reinforcing member includes the size, shape and preset position of the second reinforcing member.

[0041] Based on the second initial dental digital model, the second protrusion model, and the second reinforcing member model, a second dental digital model with a second protrusion and a second reinforcing member is generated.

[0042] The first shell-shaped body and the second shell-shaped body were designed using the digital models of the first and second jaws;

[0043] Wherein, the first shell-shaped body and the second shell-shaped body are respectively a first shell-shaped body that at least partially accommodates the maxillary teeth and a second shell-shaped body that at least partially accommodates the mandibular teeth, as described above;

[0044] When the first shell-shaped body interacts with the second shell-shaped body, the outer surface of the first reinforcing member matches the outer surface of the second reinforcing member, and the first reinforcing member and the second reinforcing member slide relative to each other to guide the upper and lower jaws to a preset biting position.

[0045] The present invention also provides a method for preparing a shell-shaped dental instrument, comprising: preparing a shell-shaped dental instrument by means of a first dental digital model and a second dental digital model designed based on the design method described above, and using a hot-press molding process.

[0046] The present invention also provides another method for preparing a shell-shaped dental instrument, comprising: directly preparing a shell-shaped dental instrument by additive manufacturing based on a first shell-shaped body and a second shell-shaped body designed by the design method described above.

[0047] This invention also provides another method for designing a shell-shaped dental instrument, comprising the following steps:

[0048] Obtain the first initial digital model of the dental jaw;

[0049] In the region between the canines and molars of the first initial digital dental model, a first protrusion model is designed in the direction of the opposing jaw. Specifically, this includes obtaining the feature information of the first protrusion. The feature information of the first protrusion includes the size and preset position of the first protrusion.

[0050] Based on the first initial dental digital model and the first protrusion model, a first dental digital model with the first protrusion is generated;

[0051] Obtain the second initial digital model of the dental jaw;

[0052] In the region between the canines and molars of the second initial digital dental model, a second protrusion model is designed in the direction of the opposing jaw. Specifically, this includes obtaining the feature information of the second protrusion; the feature information of the second protrusion includes the size and preset position of the second protrusion.

[0053] Based on the second initial dental digital model and the second protrusion model, a second dental digital model with a second protrusion is generated;

[0054] A first shell-shaped body and a second shell-shaped body are designed using a first and a second digital model of the jaw. A first reinforcing member is provided on the mesial or distal surface of the first protrusion of the first shell-shaped body, and a second reinforcing member is provided on the mesial or distal surface of the second protrusion of the second shell-shaped body. The first protrusion and the first reinforcing member are fixedly connected, and the second protrusion and the second reinforcing member are fixedly connected.

[0055] The first shell-shaped body and the first reinforcing member, as well as the second shell-shaped body and the second reinforcing member, are respectively a first shell-shaped body that at least partially accommodates the maxillary teeth and a second shell-shaped body that at least partially accommodates the mandibular teeth, as described above. When the first shell-shaped body and the second shell-shaped body interact, the outer surface of the first reinforcing member matches the outer surface of the second reinforcing member, and the outer surface of the first reinforcing member slides relative to the outer surface of the second reinforcing member to guide the maxilla and mandible to a preset occlusal position.

[0056] The shell-shaped dental instrument, orthodontic system, dental instrument design method, and manufacturing method provided by this invention can bring at least one of the following beneficial effects: improving the rigidity and / or hardness of the protrusion, and accurately guiding the upper and lower jaws to the preset occlusal position. Attached Figure Description

[0057] The preferred embodiments will now be described in a clear and easy-to-understand manner, with reference to the accompanying drawings, to further explain the above-mentioned characteristics, technical features, advantages, and implementation methods.

[0058] Figure 1 This is a schematic diagram of a shell-shaped dental instrument according to the first embodiment of the present invention;

[0059] Figure 2 for Figure 1 A schematic diagram showing the relative positional relationship between the first and second shell-shaped bodies of a dental instrument during occlusion;

[0060] Figure 3 for Figure 1 A schematic diagram showing the relative positional relationship between the first and second protrusions of a dental instrument during the biting process;

[0061] Figure 4 This is a schematic diagram of an alternative scheme for the concave-convex matching structure of the first reinforcing member and the second reinforcing member disclosed in the present invention.

[0062] Figure 5and Figure 6 This is a schematic diagram of a protrusion according to several embodiments disclosed in this invention;

[0063] Figure 7 for Figure 5 and Figure 6 A schematic diagram showing the combination and matching of different protrusions;

[0064] Figure 8 This is a schematic diagram of a protrusion with reinforcing ridges disclosed in the present invention;

[0065] Figure 9 This is a schematic diagram of an upper jaw having a first protrusion and a first reinforcing member, and a lower jaw having a second protrusion and a second reinforcing member, as disclosed in the present invention.

[0066] Figure 10 This is a schematic diagram showing the relative positional relationship between the first shell-shaped body and the second shell-shaped body of a shell-shaped dental instrument disclosed in this invention during occlusion.

[0067] Figure 11 This is a schematic diagram showing the relative positional relationship between the first shell-shaped body and the second shell-shaped body of a shell-shaped dental instrument disclosed in this invention during occlusion.

[0068] Figure 12 A flowchart illustrating a design method for a shell-shaped dental instrument according to the present invention;

[0069] Figure 13 A flowchart illustrating a design method for a shell-shaped dental instrument according to the present invention;

[0070] Figure 14 This is a schematic diagram of another embodiment of a shell-shaped dental instrument disclosed in this invention. Detailed Implementation

[0071] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the specific implementation methods of the present invention will be described below with reference to the accompanying drawings. Obviously, the accompanying drawings described below are merely some embodiments of the present invention. For those skilled in the art, other drawings and other implementation methods can be obtained based on these drawings without creative effort.

[0072] Reference Figure 1 and Figure 2In one embodiment, the present invention provides a shell-shaped dental instrument, comprising a first shell-shaped body 1 that at least partially accommodates maxillary teeth 11 and a second shell-shaped body 2 that at least partially accommodates mandibular teeth 21. The first shell-shaped body 1 has a first protrusion 3 protruding in the region between the canines and molars in the occlusal direction to guide and adjust the positional relationship between the maxilla and mandible. The second shell-shaped body 2 has a second protrusion 4 protruding in the region between the canines and molars in the occlusal direction to cooperate in adjusting the positional relationship between the maxilla and mandible. The first protrusion 3 has a first reinforcing member 31, and the second protrusion 4 has a second reinforcing member 41. The outer surfaces of the first reinforcing member 31 and the second reinforcing member 41 have a concave-convex matching structure. When the first shell-shaped body 1 and the second shell-shaped body 2 interact, the first reinforcing member 31 and the second reinforcing member 41 slide relative to each other to guide the maxilla and mandible to a preset occlusal position. The concave-convex matching structure of the first and second reinforcing members not only increases their contact stiffness by increasing their contact area, but also allows them to slide against each other to precisely guide the upper and lower jaws to the preset occlusal position, avoiding unexpected deviations in the buccal-lingual direction, thereby achieving better treatment results.

[0073] In some embodiments, the first protrusion 3 has a first outer surface 32 on its near-mid surface or far-mid surface, and the second protrusion 4 has a second outer surface 42 on its near-mid surface or far-mid surface. Simultaneously, the first reinforcing member 31 is disposed on the first outer surface 32, and the second reinforcing member 41 is disposed on the second outer surface 42. When the first shell-shaped body 1 and the second shell-shaped body 2 interact, the first reinforcing member 31 and the second reinforcing member 41 are located between the first protrusion 3 and the second protrusion 4, and the outer surface of the first reinforcing member 31 is in contact with the outer surface of the second reinforcing member 41. Specifically, as... Figure 1 as well as Figure 2 As shown in Figure 2a, when a patient uses the invisible Twin-Block appliance, the first reinforcing member 31 is disposed on the mesial surface of the first protrusion 3, and the second reinforcing member 41 is disposed on the distal surface of the second protrusion 4. When the first shell-shaped body 1 interacts with the second shell-shaped body 2, the first reinforcing member 31 of the first protrusion 3 and the second reinforcing member 41 of the second protrusion 4 guide the first protrusion 3 to move mesially through their relative sliding guiding movement, guiding the mandibular protrusion to a preset position and ensuring stable contact between the first protrusion 3 and the occlusal surface on the second shell-shaped body 2. Figure 2 As shown in 2a, the arrow points in the direction of mandibular movement. Figure 1 as well as Figure 2As shown in Figure 2b, when a patient uses the reverse invisible Twin-Block appliance, the first reinforcing member 31 is disposed on the distal surface of the first protrusion 3, and the second reinforcing member 41 is disposed on the mesial surface of the second protrusion 4. When the first shell-shaped body 1 interacts with the second shell-shaped body 2, the first reinforcing member 31 of the first protrusion 3 and the second reinforcing member 41 of the second protrusion 4 guide the first protrusion 3 to move distally through their relative sliding guiding movement, guiding the mandible to move backward to a preset position, and the first protrusion 3 and the occlusal surface on the second shell-shaped body 2 are in stable contact. Figure 2 As shown in 2b, the arrow points in the direction of jaw movement.

[0074] Figure 3 This is a schematic diagram of one embodiment of the invisible Twin-Block orthodontic appliance of the present invention, as shown below. Figure 2 as well as Figure 3 As shown, during the patient's biting process, the first shell-shaped body 1 and the second shell-shaped body 2 interact, and the first protrusion 3 slides linearly in the maxillary-mandibular direction with reference to the second protrusion 4. (Reference) Figure 1 as well as Figure 4 The outer surfaces of the first reinforcing member 31 and the second reinforcing member 41 have a concave-convex matching shape. The relative sliding motion of the concave-convex matching structure of the first reinforcing member 31 of the first protrusion 3 and the second reinforcing member 41 of the second protrusion 4 can be regarded as guide rail motion, retaining one degree of freedom of movement. Further explanation: the direction of movement is... Figure 3 The x-axis is located in the direction of the upper and lower jaws of the first outer surface 32 of the first protrusion 3. Furthermore, the concave-convex matching structure of the first reinforcing member 31 and the second reinforcing member 41 can form a cylindrical guide rail or a prismatic guide rail. Figure 4 In the diagram, 34a is a cylindrical guide rail, while 34b and 34c are prismatic guide rails. Except... Figure 4 The guide rail shape shown in the figure, in other embodiments, the prism-shaped guide rail also includes: symmetrical triangular prism-shaped guide rail, asymmetrical triangular prism-shaped guide rail, rectangular prism-shaped guide rail, dovetail-shaped prism-shaped guide rail, etc. The linear sliding structure of the first reinforcing member 31 and the second reinforcing member 41 has a simple structure and increased contact stiffness due to the increased contact area between them.

[0075] In some embodiments, the outer surface of the first reinforcing member includes a protruding geometry, and the outer surface of the second reinforcing member forms a recessed geometry that matches the protruding geometry on the opposite outer surface of the first reinforcing member.

[0076] In some embodiments, the outer surface of the second reinforcing member includes a protruding geometry, and the outer surface of the first reinforcing member forms a recessed geometry that matches the protruding geometry on the oppositely disposed outer surface of the first reinforcing member. The matching of the protruding geometry and the recessed geometry during the patient's occlusion increases the contact stability between the first protrusion and the second protrusion, preventing unintended displacement of the patient's upper and lower jaws in the buccal-lingual direction during treatment.

[0077] In some embodiments, the maximum width of the cross-section of the convex geometry on the coronal plane is less than the minimum width of the cross-section of the concave geometry on the coronal plane. Specifically, the maximum width of the cross-section of the convex portion of the convex geometry on the coronal plane is less than the minimum width of the cross-section of the concave portion of the concave geometry on the coronal plane, so that there is a small gap between the convex geometry and the concave geometry, which allows for smoother relative sliding between the first reinforcing member and the second reinforcing member, thereby reducing the friction between the first reinforcing member and the second reinforcing member, improving wear resistance, and extending the service life of the shell-shaped dental instrument.

[0078] refer to Figure 5 and Figure 6 In some embodiments, the first reinforcing member 31 and the first protrusion 3 are integrally formed or independently formed; the second reinforcing member 41 and the second protrusion 4 are integrally formed or independently formed. Specifically, the protrusion and the protruding reinforcing member 51-1 are integrally formed as an integral protrusion 5-1; the protrusion and the recessed reinforcing member 61-1 are integrally formed as an integral recessed protrusion 6-1; the protrusion and the protruding reinforcing member 51-2 are independently formed as non-integral protrusions 5-2; the protrusion and the recessed reinforcing member 61-1 are independently formed as non-integral recessed protrusions 6-2. (See reference) Figure 7 The diagram shows four different combinations of protrusions: one-piece protrusion 5-1 and one-piece recessed protrusion 6-1, non-one-piece protrusion 5-2 and non-one-piece recessed protrusion 6-2, non-one-piece protrusion 5-2 and one-piece recessed protrusion 6-1, and one-piece protrusion 5-1 and non-one-piece recessed protrusion 6-2.

[0079] In some embodiments, the wall thickness of the first reinforcing member 31 is greater than or equal to the wall thickness of the first protrusion 3; the wall thickness of the second reinforcing member 41 is greater than or equal to the wall thickness of the second protrusion 4. The purpose is to increase the stiffness of the first reinforcing member 31 and the second reinforcing member 41, preventing compressive deformation during their interaction and reducing wear during this interaction. Specifically, the wall thickness of the first protrusion 3 and the second protrusion 4 is 0.1mm-0.2mm, the outer surface thickness of the first reinforcing member 31 is 1.0-1.5 times the thickness of the first outer surface 32 of the first protrusion 3; the outer surface thickness of the second reinforcing member 41 is 1.0-1.5 times the thickness of the second outer surface 42 of the second protrusion 4, wherein the wall thickness is the thickness between the inner and outer surfaces of the first and second reinforcing members.

[0080] In some embodiments, when the first reinforcing member 31 and the first protrusion 3 are each formed independently, the stiffness of the first reinforcing member 31 is greater than or equal to the stiffness of the first protrusion 3; when the second reinforcing member 41 and the second protrusion 4 are each formed independently, the stiffness of the second reinforcing member 41 is greater than or equal to the stiffness of the second protrusion 4. Preferably, the reinforcing member is made of a material with greater stiffness than the protrusion, such as other polymer materials, ceramics, or metals.

[0081] In some embodiments, the first reinforcing member 31 and the first protrusion 3 are configured as either a non-removable fixed connection or a detachable fixed connection; the second reinforcing member 41 and the second protrusion 4 are configured as either a non-removable fixed connection or a detachable fixed connection. Specifically, the non-removable fixed connection includes: adhesive fixed connection, welded fixed connection, riveted fixed connection, etc.; the detachable fixed connection includes: pin connection, plug connection, etc. The detachable fixed connection allows for the replacement of different reinforcing members according to different orthodontic needs, which can solve more different orthodontic solutions. For example, doctors can use different reinforcing members according to different cases or different patients, or for the same patient, different reinforcing members can be replaced in different orthodontic steps according to different orthodontic needs, thereby improving the utilization rate of the first shell body and the second shell body and saving orthodontic costs.

[0082] In some embodiments, the protrusion may be provided to extend from the buccal surface of the shell-like body, from the occlusal surface, from the lingual surface, from both the buccal and occlusal surfaces, from both the lingual and occlusal surfaces, or from both the buccal and lingual surfaces and the occlusal surface.

[0083] refer to Figure 8 and Figure 9In some embodiments, at least one reinforcing ridge 7 is provided on at least one surface of the first protrusion 3 and / or the second protrusion 4, including the buccal side, lingual side, mesial side, and distal side. Specifically, the reinforcing ridge 7 is integrally formed with the first protrusion 3 and / or the reinforcing ridge 7 and the second protrusion 4. Their number can be increased or decreased on different sets of shell bodies depending on the required corrective force. Furthermore, the reinforcing ridge 7 intersects or is parallel to the orbitoauricular plane (horizontal plane). In these embodiments, the surface curvature of the reinforcing ridge 7 exceeds the outer surface curvature of the protrusion, and the surface curvature of the reinforcing ridge 7 also needs to satisfy that, when it is located on the mesial or distal side of the protrusion, the outer surface curvature of the reinforcing ridge 7 is less than or equal to the outer surface curvature of the reinforcing member. The purpose is that the reinforcing ridge 7 does not affect the stable contact between the first reinforcing member 31 and the second reinforcing member 41 and does not change the size of the gap between the first reinforcing member and the second reinforcing member.

[0084] In other embodiments, the first protrusion 3 and the second protrusion 4 are further provided with a filling portion (not shown). The filling portion may be provided in the hollow portion of the first protrusion 3 and the second protrusion 4. The reinforcing member, the filling portion and / or the reinforcing ridge 7 together prevent the first protrusion 3 and the second protrusion 4 from being worn, squeezed and deformed during biting, so as to better adjust the relationship between the upper and lower jaws.

[0085] refer to Figure 9 The first protrusion 3 and the second protrusion 4 are not used in conjunction with the invisible aligner, but are fixed to the patient's tooth surface independently. The fixing position can be set on the occlusal surface, lingual surface or buccal surface of the tooth. The fixing method can be by bonding with adhesive so that the first protrusion 3 and the second protrusion 4 can firmly cover one or more of the patient's teeth.

[0086] In some embodiments, reference Figure 10 When the first shell-shaped body 1 and the second shell-shaped body 2 interact, the protrusion and the shell-shaped body maintain stable planar contact; Reference Figure 11 When the first shell-shaped body 1 and the second shell-shaped body 2 interact, the surface of the protrusion facing the opposing occlusal surface has the same anatomical features as the posterior occlusal surface of the shell-shaped body. During occlusion, the occlusal surface of the protrusion and the posterior occlusal surface of the shell-shaped body maintain stable contact through a matching or occlusal match. In other embodiments, the protrusion is an independently formed solid protrusion that can be directly fixed to the patient's tooth surface. The surface of the protrusion facing the opposing occlusal surface has the same anatomical features as the posterior occlusal surface of the patient. During occlusion, the occlusal surface of the protrusion and the posterior occlusal surface maintain stable contact through a matching or occlusal match. The occlusal anatomical features refer to the concave-convex structure composed of cusps and fissures on the occlusal surface of the teeth.

[0087] The present invention also provides a dental orthodontic system, comprising multiple sets of shell-shaped dental instruments, wherein the multiple sets of shell-shaped dental instruments include at least one set of shell-shaped dental instruments provided in any of the embodiments described above. Under the combined action of the multiple sets of shell-shaped dental instruments, the patient's teeth can be gradually repositioned from the initial position to the target orthodontic position.

[0088] In some embodiments, the height of the first protrusion 3 and the height of the second protrusion 4 in the opposing direction on the shell-shaped dental instruments corresponding to different orthodontic steps are set in association with the orthodontic steps. Specifically, an orthodontic system can simultaneously correct malocclusion while adjusting intermaxillary relationships. The orthodontic system includes at least one series of shell-shaped dental instruments, and each series includes at least one set of shell-shaped dental instruments. Each set of shell-shaped dental instruments includes a first shell body and a second shell body. During orthodontic treatment, the patient needs to wear a series of shell-shaped dental instruments, and one series of shell-shaped dental instruments includes multiple sets of shell-shaped dental instruments as described above. Specifically, the height of the first protrusion 3 and the height of the second protrusion 4 in the opposing direction of the same series of multiple sets of shell-shaped dental instruments gradually decrease as the orthodontic process progresses to achieve the target orthodontic effect.

[0089] The present invention also provides a design method for a shell-shaped dental instrument, for obtaining a first shell-shaped body in which a first reinforcing member 31 and a first protrusion 3 are integrally formed, and a second shell-shaped body in which a second reinforcing member 41 and a second protrusion 4 are integrally formed.

[0090] Figure 12 The present invention provides a flowchart of a design method for a shell-shaped dental instrument.

[0091] S1: Obtain the first initial digital model of the dental jaw;

[0092] S2: Design a first protrusion model in the region between the canine and molar in the first initial digital dental model, and design a first reinforcing member model on the mesial or distal surface of the first protrusion: including obtaining the feature information of the first protrusion and the feature information of the first reinforcing member;

[0093] S3: Based on the first initial dental digital model, the first protrusion model, and the first reinforcing member model, generate a first dental digital model having a first protrusion and a first reinforcing member;

[0094] S4: Obtain the second initial digital model of the jaw;

[0095] S5: Design a second protrusion model in the region between the canine and molar in the second initial digital dental model, and design a second reinforcing member model on the mesial or distal surface of the second protrusion: including obtaining the feature information of the second protrusion and the feature information of the second reinforcing member;

[0096] S6: Based on the second initial dental digital model, the second protrusion model, and the second reinforcing member model, generate a second dental digital model with a second protrusion and a second reinforcing member;

[0097] S7: Design the first shell-shaped body and the second shell-shaped body using the first and second digital models of the first and second jaws;

[0098] refer to Figures 1 to 3 The first shell-shaped body and the second shell-shaped body are respectively a first shell-shaped body 1 that at least partially accommodates the maxillary teeth 11 and a second shell-shaped body 2 that at least partially accommodates the mandibular teeth 21, as described above; when the first shell-shaped body 1 and the second shell-shaped body 2 interact, the outer surface of the first reinforcing member 31 matches the outer surface of the second reinforcing member 41, and the first reinforcing member 31 and the second reinforcing member 41 slide relative to each other to guide the upper and lower jaws to a preset occlusal position.

[0099] Specifically, the execution of S1 to S3 can be performed synchronously with the execution of S4 to S6, or S3 to S6 can be performed before S1 to S3. In other words, there are no restrictions on the design order of the first shell-shaped body and the second shell-shaped body in this invention.

[0100] In some embodiments, during the fabrication process, the thickness of the outer surface of the first reinforcing member 31 and the outer surface of the second reinforcing member 41 can be increased according to the corrective force required by the patient. For example, a film with uneven thickness can be used when using a thermoforming fabrication method, or the 3D printing can be performed directly based on a digital model of a shell-shaped dental instrument.

[0101] The present invention also provides a design method for a shell-shaped dental instrument, for obtaining a first shell-shaped body in which the first reinforcing member 31 and the first protrusion 3 are not integrally formed, and a second shell-shaped body in which the second reinforcing member 41 and the second protrusion 4 are not integrally formed.

[0102] Figure 13 The present invention provides a flowchart of a design method for a shell-shaped dental instrument.

[0103] S1: Obtain the first initial digital model of the dental jaw;

[0104] S2: Design a first protrusion model in the region between the canine and molar in the first initial digital dental model in the direction of the opposing jaw, including obtaining the feature information of the first protrusion;

[0105] S3: Based on the first initial dental digital model and the first protrusion model, generate a first dental digital model with the first protrusion;

[0106] S4: Obtain the second initial digital model of the jaw;

[0107] S5: Design a second protrusion model in the region between the canine and molar in the second initial digital dental model in the direction of the opposing jaw, including obtaining the feature information of the second protrusion;

[0108] S6: Based on the second initial dental digital model and the second protrusion model, generate a second dental digital model with a second protrusion;

[0109] S7: Design the first shell-shaped body and the second shell-shaped body using the first and second digital models of the first and second jaws;

[0110] S8: A first reinforcing member is provided on the near-middle surface or the far-middle surface of the first protrusion of the first shell-shaped body, and a second reinforcing member is provided on the near-middle surface or the far-middle surface of the second protrusion of the second shell-shaped body.

[0111] refer to Figures 1 to 3 The first shell-shaped body and the second shell-shaped body are respectively the first shell-shaped body 1 for accommodating the maxillary tooth 11 and the second shell-shaped body 2 for accommodating the mandibular tooth 21, as described above. When the first shell-shaped body 1 and the second shell-shaped body 2 interact, the outer surface of the first reinforcing member 31 matches the outer surface of the second reinforcing member 41, and the first reinforcing member 31 and the second reinforcing member 41 slide relative to each other to guide the maxilla and mandible to a preset occlusal position. Simultaneously, the first protrusion 3 and the first reinforcing member 31 are fixedly connected; the second protrusion 4 and the second reinforcing member 41 are also fixedly connected, the fixed connection including a non-removable fixed connection or a detachable fixed connection. The fixed position of the reinforcing member can be marked on the protrusion during the manufacturing process, and the reinforcing member is fixed according to the marked position of the protrusion.

[0112] Specifically, the execution of S1 to S3 can be performed synchronously with the execution of S3 to S6, or S3 to S6 can be executed before S1 to S3. In other words, there are no restrictions on the design order of the first shell-shaped body and the second shell-shaped body in this invention.

[0113] The present invention also provides a method for preparing a shell-shaped dental instrument, comprising: preparing a shell-shaped dental instrument by means of a first dental digital model and a second dental digital model designed based on the design method described above, and using a hot-press molding process.

[0114] The present invention also provides another method for preparing a shell-shaped dental instrument, comprising: directly preparing a shell-shaped dental instrument by additive manufacturing based on a first shell-shaped body and a second shell-shaped body designed by the design method described above.

[0115] In some embodiments, the fabrication module in the preparation method can also be a 3D printing device, a molding device, a cutting device, a polishing device, and a cleaning and disinfection device. The specific preparation process is as follows: first, a digital dental model that meets the requirements is directly printed using 3D printing technology; second, a molding operation is performed on the printed 3D dental model; and finally, the molded shell-shaped dental instrument is cut, polished, cleaned, and disinfected. The fixed connection process between the protrusion and the reinforcing member can be performed before or after any of the following processes: after the molding process (excluding the molding process) and before the disinfection process (excluding the disinfection process). Alternatively, the reinforcing member can be installed by referring to the marked position of the protrusion during the doctor's use.

[0116] In some embodiments, reference Figure 14 The protrusion has at least one reinforcing surface on the cheek side and / or tongue side, and at least one reinforcing member on one reinforcing surface. At the same time, the reinforcing member is integrally formed with the protrusion. The reinforcing member is formed by bending a portion of the cheek side and / or tongue side of the protrusion inward or outward. More specifically, the reinforcing member can be bent outward to form a protrusion structure.

[0117] It should be noted that the above embodiments can be freely combined as needed. The above description is only a preferred embodiment of the present invention. It should be pointed out that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A shell-shaped dental instrument, characterized by: The device includes 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 has a first protrusion protruding in the region between the canines and molars in the opposing direction, providing a first protrusion to guide and adjust the positional relationship between the maxilla and mandible. The second shell-shaped body has a second protrusion protruding in the region between the canines and molars in the opposing direction, providing a second protrusion to cooperate in adjusting the positional relationship between the maxilla and mandible. The first protrusion has a first reinforcing member, and the second protrusion has a second reinforcing member. The outer surfaces of the first and second reinforcing members have a matching concave-convex structure. When the first shell-shaped body and the second shell-shaped body interact... The first reinforcing member and the second reinforcing member slide relative to each other to guide the upper and lower jaws to a preset occlusal position. The first protrusion has a first outer surface on the mesial or distal surface, and the second protrusion has a second outer surface on the mesial or distal surface. At the same time, the first reinforcing member is disposed on the first outer surface, and the second reinforcing member is disposed on the second outer surface. When the first shell-shaped body and the second shell-shaped body interact, the first reinforcing member and the second reinforcing member are located between the first protrusion and the second protrusion. At the same time, the outer surface of the first reinforcing member and the outer surface of the second reinforcing member are in contact with each other.

2. The shell-like dental instrument of claim 1, wherein: When the first shell-shaped body interacts with the second shell-shaped body, the first protrusion guides the second protrusion to move in a proximal or distal direction. At the same time, the second protrusion moves to a preset position so that the first protrusion and the engagement surface on the second shell-shaped body are in stable contact.

3. The shell-like dental instrument of claim 1, wherein: When the first shell-shaped body interacts with the second shell-shaped body, the first reinforcing member slides back and forth in a given direction with reference to the second reinforcing member.

4. The shell-like dental instrument of claim 3, wherein: The straight line is parallel to the first outer surface of the first protrusion and the second outer surface of the second protrusion.

5. The shell-like dental instrument of claim 1, wherein: The outer surface of the first reinforcing member includes a protruding geometry, and the outer surface of the second reinforcing member forms a recessed geometry that matches the protruding geometry on the outer surface of the first reinforcing member.

6. The shell-like dental instrument of claim 1, wherein: The outer surface of the second reinforcing member includes a protruding geometry, and the outer surface of the first reinforcing member forms a recessed geometry that matches the protruding geometry on the oppositely disposed outer surface of the first reinforcing member.

7. The shell-like dental instrument of claim 5 or 6, wherein: The surfaces of the protruding geometry and the surfaces of the concave geometry are curved surfaces.

8. The shell-like dental instrument of claim 5 or 6, wherein: The cross-sections of the convex geometry and the concave geometry in the horizontal direction are polygons.

9. The shell-like dental instrument of claim 5 or 6, wherein: The maximum width of the cross-section of the convex geometry on the coronal plane is less than the minimum width of the cross-section of the concave geometry on the coronal plane.

10. The shell-like dental instrument of claim 1, wherein: The first reinforcing member and the first protrusion are integrally formed or each is formed independently; the second reinforcing member and the second protrusion are integrally formed or each is formed independently.

11. The shell-like dental instrument of claim 10, wherein: When the first reinforcing member is integrally formed with the first protrusion, the wall thickness of the first reinforcing member is greater than or equal to the wall thickness of the first protrusion. When the second reinforcing member is integrally formed with the second protruding portion, the wall thickness of the second reinforcing member is greater than or equal to the wall thickness of the second protruding portion.

12. The shell-like dental instrument of claim 10, wherein: When the first reinforcing member and the first protruding portion are independently formed, the rigidity of the first reinforcing member is greater than or equal to the rigidity of the first protruding portion. When the second reinforcing member and the second protruding portion are independently formed, the rigidity of the second reinforcing member is greater than or equal to the rigidity of the second protruding portion.

13. The shell-like dental instrument of claim 10, wherein: The first reinforcing member and the first protruding portion are arranged in non-detachable fixed connection or detachable fixed connection; the second reinforcing member and the second protruding portion are arranged in non-detachable fixed connection or detachable fixed connection.

14. The shell-like dental instrument of claim 13, wherein: The non-detachable fixed connection is at least one of adhesive fixed connection, welding fixed connection, and riveting fixed connection.

15. The shell-like dental instrument of claim 1, wherein: The first protruding portion extends from the buccal side to the lingual side of the first shell-shaped body; the second reinforcing member extends from the buccal side to the lingual side of the second shell-shaped body.

16. The shell-like dental instrument of claim 15, wherein: The surface extension includes any one of the following extension modes: extension from the buccal side surface, extension from the occlusal surface, extension from the lingual side surface, extension from the buccal side surface and the occlusal surface, extension from the lingual side surface and the occlusal surface, and extension from the buccal side surface, the lingual side surface, and the occlusal surface.

17. The shell-like dental instrument of claim 1, wherein: At least one reinforcing ridge is arranged on at least one of the buccal side, the lingual side, the mesial surface, and the distal surface of the first protruding portion and / or the second protruding portion.

18. The shell-like dental instrument of claim 17, wherein: The reinforcing ridge is integrally formed with the first protruding portion and the second protruding portion.

19. The shell-like dental instrument of claim 18, wherein: The reinforcing ridge is formed by protruding or recessing from the buccal side, the lingual side, the mesial surface, and the distal surface.

20. The shell-like dental instrument of claim 18, wherein: When the reinforcing ridge is arranged on the mesial surface or the distal surface of the protruding portion, the outer surface curvature of the reinforcing ridge is less than or equal to the outer surface curvature of the reinforcing member.

21. An orthodontic system comprising a plurality of sets of shell-like dental appliances, characterized in that: The plurality of sets of shell-shaped dental instruments includes at least one set of shell-shaped dental instruments as claimed in any one of claims 1-20.

22. The tooth alignment system of claim 21, wherein: The protruding heights of the first protruding portion and the second protruding portion in the interarch direction arranged on the shell-shaped dental instruments corresponding to different orthodontic stages are arranged in association with the corresponding different orthodontic stages.

23. The tooth alignment system of claim 21, wherein: The mechanical parameters of the first reinforcing member of the first protruding portion and the mechanical parameters of the second reinforcing member of the second protruding portion arranged on different sets of shell-shaped dental instruments are arranged differently according to different orthodontic target parameters corresponding to different orthodontic stages.

24. The tooth alignment system of claim 23, wherein: The changes in the mechanical parameters include changes in at least one of the following parameters: strength, hardness, rigidity, and elasticity characteristics.

25. A design method of a shell-shaped dental instrument, characterized by: obtaining a first initial dental arch digital model; designing a first protrusion model in the region between canine and molar of the first initial dental arch digital model in the intercuspid direction, wherein a first reinforcing member model is designed on the mesial or distal surface of the first protrusion, specifically comprising obtaining characteristic information of the first protrusion and the first reinforcing member respectively; wherein the characteristic information of the first protrusion comprises the size and preset position of the first protrusion, and the characteristic information of the first reinforcing member comprises the size, shape and preset position of the first reinforcing member; generating a first dental arch digital model with the first protrusion and the first reinforcing member based on the first initial dental arch digital model, the first protrusion model and the first reinforcing member model; obtaining a second initial dental arch digital model; designing a second protrusion model in the region between canine and molar of the second initial dental arch digital model in the intercuspid direction, wherein a second reinforcing member model is designed on the mesial or distal surface of the second protrusion, specifically comprising obtaining characteristic information of the second protrusion and the second reinforcing member; wherein the characteristic information of the second protrusion comprises the size and preset position of the second protrusion, and the characteristic information of the second reinforcing member comprises the size, shape and preset position of the second reinforcing member; generating a second dental arch digital model with the second protrusion and the second reinforcing member based on the second initial dental arch digital model, the second protrusion model and the second reinforcing member model; designing a first shell body and a second shell body by using the first dental arch digital model and the second dental arch digital model; wherein the first shell body and the second shell body are respectively a first shell body for accommodating at least part of maxillary teeth and a second shell body for accommodating at least part of mandibular teeth as described in claims 1-20; when the first shell body and the second shell body interact, the outer surface of the first reinforcing member and the outer surface of the second reinforcing member are in concave-convex matching, and the relative sliding of the first reinforcing member and the second reinforcing member guides the upper and lower jaws to a preset occlusion position.

26. A method of making a shell-like dental appliance, characterized by: The first dental arch digital model and the second dental arch digital model designed based on the design method of claim 25 are used to prepare a shell-shaped dental instrument by using a hot-pressing film forming process.

27. A method of making a shell-like dental appliance, characterized by: The first shell body and the second shell body designed based on the design method of claim 25 are used to directly prepare a shell-shaped dental instrument by using an additive manufacturing method.

28. A design method of a shell-shaped dental instrument, characterized by: obtaining a first initial dental arch digital model; designing a first protrusion model in the region between canine and molar of the first initial dental arch digital model in the intercuspid direction, specifically comprising obtaining characteristic information of the first protrusion; the characteristic information of the first protrusion comprises the size and preset position of the first protrusion; generating a first dental arch digital model with the first protrusion based on the first initial dental arch digital model and the first protrusion model; obtaining a second initial dental arch digital model; designing a second protrusion model in the region between canine and molar of the second initial dental arch digital model in the intercuspid direction, specifically comprising obtaining characteristic information of the second protrusion; The second protrusion feature information includes a size and a preset position of the second protrusion; generating a second dental arch digital model with a second protrusion based on the second initial dental arch digital model and the second protrusion model; designing a first shell body and a second shell body by using the first dental arch digital model and the second dental arch digital model; setting a first reinforcing member on the mesial surface or the distal surface of the first protrusion of the first shell body, and setting a second reinforcing member on the mesial surface or the distal surface of the second protrusion of the second shell body; the first protrusion and the first reinforcing member are fixedly connected, and the second protrusion and the second reinforcing member are fixedly connected; wherein, the first shell body and the first reinforcing member and the second shell body and the second reinforcing member are respectively a first shell body accommodating at least part of the maxillary teeth and a second shell body accommodating at least part of the mandibular teeth as described in claims 1-20; when the first shell body and the second shell body interact, the outer surfaces of the first reinforcing member and the second reinforcing member are concave-convex matched, and the relative sliding of the outer surfaces of the first reinforcing member and the second reinforcing member guides the upper and lower jaws to a preset occlusion position.

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