Appliance assembly

Abstract

Disclosed in the present application is an appliance assembly, comprising a first appliance and a second appliance. The first appliance comprises a first appliance body and a first fixing portion provided on the first appliance body; and the second appliance comprises a second appliance body and a second fixing portion provided on the second appliance body. The first fixing portion comprises a first fixing portion body connected to the first appliance body and a first limiting structure. The second fixing portion comprises a second fixing portion body connected to the second appliance body and a second limiting structure. When the first appliance and the second appliance are in an engaged state, the first fixing portion body and the second fixing portion body cooperate with each other to limit the relative movement of the first appliance and the second appliance on the horizontal plane, and the first limiting structure and the second limiting structure cooperate with each other to limit the relative movement of the first appliance and the second appliance in the vertical direction. The present application can improve the stability of the connection between the first appliance and the second appliance.

Description

Orthodontic appliance components

[0001] This application claims priority to Chinese Patent Application No. 202411746095.1, filed on November 29, 2024, entitled "Orthodontic Appliance Assembly", and Chinese Patent Application No. 202521150079.6, filed on June 5, 2025, entitled "Orthodontic Appliance Assembly", the entire contents of which are incorporated herein by reference. Technical Field

[0002] This application relates to the field of orthodontic technology, and more particularly to an orthodontic appliance assembly. Background Technology

[0003] Currently, when using orthodontic appliances made of polymer materials for teeth correction, the two appliances corresponding to the upper and lower teeth are usually independent of each other. However, in some applications, such as jaw alignment and correction of bad oral habits, it is necessary to use two appliances that are combined. Therefore, it is necessary to design a stable orthodontic appliance assembly. Summary of the Invention

[0004] The purpose of this application is to provide an orthodontic appliance assembly that helps improve the connection stability between two orthodontic appliances.

[0005] This application provides an orthodontic appliance assembly, including a first orthodontic appliance corresponding to a first jaw and a second orthodontic appliance corresponding to a second jaw. The first orthodontic appliance includes a first appliance body and a first retention portion located on the first appliance body. The second orthodontic appliance includes a second appliance body and a second retention portion located on the second appliance body. The first retention portion includes a first retention portion body connected to the first appliance body and a first limiting structure connected to the first retention portion body. The second retention portion includes a second retention portion body connected to the second appliance body and a second limiting structure connected to the second retention portion body. When the first orthodontic appliance and the second orthodontic appliance are in an occlusal state, the first retention portion body and the second retention portion body cooperate to restrict the relative movement of the first orthodontic appliance and the second orthodontic appliance in the horizontal plane, and the first limiting structure and the second limiting structure cooperate to restrict the relative movement of the first orthodontic appliance and the second orthodontic appliance in the vertical direction.

[0006] This application provides an orthodontic appliance assembly, including a first orthodontic appliance body accommodating a first jaw, a second orthodontic appliance body accommodating a second jaw, and multiple retention groups connecting the first orthodontic appliance body and the second orthodontic appliance body. The multiple retention groups located in different regions cooperate with each other to achieve full movement limitation and full rotation limitation. The retention group in a certain region achieves partial movement limitation and / or partial rotation limitation. The movement limitation includes the movement limitation of the first orthodontic appliance body and the second orthodontic appliance body in a first plane, and the rotation limitation includes the rotation limitation of the first orthodontic appliance body and the second orthodontic appliance body in the dental arch direction.

[0007] This application provides an orthodontic appliance assembly, including a first orthodontic appliance corresponding to a first jaw and a second orthodontic appliance corresponding to a second jaw. The first orthodontic appliance includes a first appliance body and a groove protruding from a first occlusal surface of the first appliance body. The second orthodontic appliance includes a second appliance body and a protrusion protruding from a second occlusal surface of the second appliance body. Both the groove and the protrusion extend from the posterior tooth region to the anterior tooth region on one side of the dental midline. The groove is formed by combining a first block and a second block, which are discontinuous on the buccal and lingual sides. The protrusion is a continuous structure. When the first orthodontic appliance and the second orthodontic appliance are in an occlusal state, the groove and the protrusion cooperate with each other to restrict the relative movement of the first orthodontic appliance and the second orthodontic appliance in at least a portion of the horizontal direction.

[0008] Compared with the prior art, the beneficial effects of this application are as follows: This application connects the first and second orthodontic appliances through a first retention part and a second retention part. The body of the first retention part and the first limiting structure are located in the same first retention part, and the body of the second retention part and the second limiting structure are located in the same second retention part. Through the mutual cooperation of the first and second retention parts, the mutual cooperation of the body of the first retention part and the body of the second retention part, as well as the mutual cooperation of the first limiting structure and the second limiting structure, can be realized simultaneously. That is, the relative movement of the first and second orthodontic appliances in the horizontal and vertical directions can be realized at the same time. This embodiment realizes multi-dimensional limiting through a simple structure, which greatly improves the connection stability between the first and second orthodontic appliances, thereby improving the corresponding orthodontic effect, and is convenient for patients to wear themselves.

[0009] In addition, the first retention part and the second retention part of this application are located on the first occlusal surface and the second occlusal surface, respectively. When the patient wears the orthodontic appliance components, the first retention part and the second retention part will not interfere with the lip and cheek muscles, which can greatly improve the patient experience. Attached Figure Description

[0010] Figures 1 and 2 are schematic diagrams of the orthodontic appliance assembly of the first specific embodiment of the first embodiment of this application;

[0011] Figure 3 is a cross-sectional view of the orthodontic appliance assembly of the first specific embodiment of the first embodiment of this application;

[0012] Figure 4 is a partial structural schematic diagram of the first orthodontic appliance of the first specific embodiment of the first embodiment of the present application;

[0013] Figure 5 is a partial structural schematic diagram of the second orthodontic appliance of the first specific embodiment of the first embodiment of this application;

[0014] Figure 6 is a schematic diagram of the cross-section of AA in Figure 3;

[0015] Figures 7 to 12 are schematic diagrams of the partial structure of the orthodontic appliance component in the first implementation;

[0016] Figures 13 to 15 are schematic diagrams of the partial structure of the orthodontic appliance component in the second implementation;

[0017] Figure 16 is a schematic diagram of the partial structure of the orthodontic appliance component in the third implementation form;

[0018] Figure 17 is a schematic diagram of the first periphery shape design of the first specific embodiment of the first embodiment of this application;

[0019] Figures 18 to 20 are cross-sectional views of different examples of the first retaining part and the second retaining part cooperating with each other in the first specific embodiment of the first embodiment of this application;

[0020] Figure 21 is a schematic diagram of the protruding ridge design of the first specific embodiment of the first embodiment of this application;

[0021] Figure 22 is a schematic diagram of the size design of the first retaining part and the second retaining part in the first specific embodiment of the first embodiment of this application;

[0022] Figures 23 to 25 are schematic diagrams of the guide surface of the first specific embodiment of the first embodiment of this application;

[0023] Figures 26 and 27 are schematic diagrams of different distribution forms of the first limiting structure in the first specific embodiment of the first embodiment of this application;

[0024] Figures 28 and 29 are schematic diagrams of the protruding direction of the groove protrusion in the first specific embodiment of the first embodiment of this application;

[0025] Figures 30 and 31 are schematic diagrams of an orthodontic appliance assembly having multiple sets of retention parts and additional positioning parts according to a first specific embodiment of the first embodiment of this application.

[0026] Figure 32 is a schematic diagram of the additional positioning group in a first specific embodiment of the first embodiment of this application;

[0027] Figures 33 to 36b are schematic diagrams of an orthodontic appliance assembly having multiple sets of retention parts and additional positioning parts according to a first specific embodiment of the first embodiment of this application.

[0028] Figures 37 to 39 are schematic diagrams of the orthodontic appliance assembly of the second specific embodiment of the first embodiment of this application;

[0029] Figures 40a and 40b are schematic diagrams showing the separation of the orthodontic appliance components in the second specific embodiment of the first embodiment of this application;

[0030] Figures 41 and 42 are schematic diagrams from different perspectives of the first and second retaining parts cooperating with each other in the second specific embodiment of the first embodiment of this application.

[0031] Figures 43 to 55 are schematic diagrams of several implementation forms of the grooves and protrusions in the second specific embodiment of the first embodiment of this application;

[0032] Figure 56 is a schematic diagram of the first limiting structure and the second limiting structure in a second specific embodiment of the first embodiment of this application;

[0033] Figures 57 and 58 are schematic diagrams of the guide surface of a second specific embodiment of the first embodiment of this application;

[0034] Figure 59 is a schematic diagram of the enclosure of a second specific embodiment of the first embodiment of this application;

[0035] Figures 60 and 61 are schematic diagrams of the orthodontic appliance assembly according to the second embodiment of this application;

[0036] Figure 62 is a cross-sectional view of the enclosure wall and protrusion fitting together according to the second embodiment of this application;

[0037] Figure 63 is a schematic diagram of the enclosure wall and protrusion fitting together according to the second embodiment of this application;

[0038] Figures 64 to 66 are various specific examples of the cooperation forms between the multiple enclosures and multiple protrusions in the second embodiment of this application;

[0039] Figures 67 to 75 are various specific examples of the layout of multiple retention groups according to the second embodiment of this application;

[0040] Figure 76 is a schematic diagram of the orthodontic appliance assembly according to the third embodiment of this application;

[0041] Figure 77 is a schematic diagram of the first orthodontic appliance according to the third embodiment of this application;

[0042] Figure 78 is a schematic diagram of the second orthodontic appliance according to the third embodiment of this application;

[0043] Figure 79 is a schematic diagram of the first and second orthodontic appliances in an engaged state according to the third embodiment of this application;

[0044] Figure 80 is a schematic diagram of the groove and protrusion fitting together when there is no fourth enclosure wall;

[0045] Figure 81 is a schematic diagram of the groove and protrusion fitting together when there is a fourth enclosure wall;

[0046] Figure 82 is a perspective view of the first orthodontic appliance according to the third embodiment of this application;

[0047] Figures 83 and 84 are schematic diagrams of the first block from different perspectives;

[0048] Figure 85 is a schematic diagram of the third enclosure wall mating protrusion and connecting plate according to the third embodiment of this application;

[0049] Figures 86 and 87 are schematic diagrams of the protrusion from different perspectives;

[0050] Figure 88 is a perspective view of the protrusion and groove fitting together in the third embodiment of this application. Detailed Implementation

[0051] The present application will now be described in detail with reference to the embodiments shown in the accompanying drawings. However, these embodiments do not limit the present application, and any structural, methodological, or functional modifications made by those skilled in the art based on these embodiments are included within the scope of protection of this application.

[0052] Referring to Figures 1 to 6, the first embodiment of this application provides an orthodontic appliance assembly 300.

[0053] The orthodontic appliance assembly 300 includes a first orthodontic appliance 100 corresponding to the first jaw T1 and a second orthodontic appliance 200 corresponding to the second jaw T2.

[0054] Both the first orthodontic appliance 100 and the second orthodontic appliance 200 are invisible orthodontic appliances made of polymer materials. One of the first jaw T1 and the second jaw T2 is the maxilla, and the other is the mandible.

[0055] The first orthodontic appliance 100 includes a first orthodontic appliance body 10 and a first retention portion 11 located on the first orthodontic appliance body 10. The first retention portion 11 includes a first retention portion body 12 connected to the first orthodontic appliance body 10 and a first limiting structure 13 connected to the first retention portion body 12.

[0056] The second orthodontic appliance 200 includes a second orthodontic appliance body 20 and a second retention portion 21 located on the second orthodontic appliance body 20. The second retention portion 21 includes a second retention portion body 22 connected to the second orthodontic appliance body 20 and a second limiting structure 23 connected to the second retention portion body 22.

[0057] When the first orthodontic appliance 100 and the second orthodontic appliance 200 are in an occlusal state, the first retention part 11 and the second retention part 21 cooperate with each other to keep the first orthodontic appliance 100 and the second orthodontic appliance 200 in a preset relative position, so as to achieve tooth correction and retention, such as jaw position adjustment.

[0058] Specifically, when the first orthodontic appliance 100 and the second orthodontic appliance 200 are in an engaged state, the first retention part body 12 and the second retention part body 22 cooperate to restrict the relative movement of the first orthodontic appliance 100 and the second orthodontic appliance 200 in the horizontal plane X. The first limiting structure 13 and the second limiting structure 23 cooperate to restrict the relative movement of the first orthodontic appliance 100 and the second orthodontic appliance 200 in the vertical direction Z.

[0059] The horizontal plane X is roughly the sectional plane that divides the jaw into upper and lower parts, and the vertical plane Z is roughly perpendicular to the horizontal plane X.

[0060] This embodiment connects the first orthodontic appliance 100 and the second orthodontic appliance 200 through a first retention part 11 and a second retention part 21. The first retention part body 12 and the first limiting structure 13 are located in the same first retention part 11, and the second retention part body 22 and the second limiting structure 23 are located in the same second retention part 21. Through the mutual cooperation of the first retention part 11 and the second retention part 21, the mutual cooperation of the first retention part body 12 and the second retention part body 22, as well as the mutual cooperation of the first limiting structure 13 and the second limiting structure 23, can be realized simultaneously, that is, the relative movement of the first orthodontic appliance 100 and the second orthodontic appliance 200 in the horizontal plane X and the vertical plane Z can be realized simultaneously. This embodiment achieves multi-dimensional limiting through a simple structure, which greatly improves the connection stability between the first orthodontic appliance 100 and the second orthodontic appliance 200, thereby improving the corresponding orthodontic effect, and is convenient for patients to wear themselves.

[0061] The following describes several specific embodiments of the orthodontic appliance assembly 300.

[0062] Referring to Figures 1 to 6, in the first embodiment of this application, the first retention portion 11 of the orthodontic appliance assembly 300 is located on the first occlusal surface A1 of the first orthodontic appliance body 10, and the first retention portion body 12 is connected to the first occlusal surface A1. The second retention portion 21 is located on the second occlusal surface A2 of the second orthodontic appliance body 20, and the second retention portion body 22 is connected to the second occlusal surface A2.

[0063] The first orthodontic appliance body 10 has a first cavity S1 that matches the first jaw T1, and the second orthodontic appliance body 20 has a second cavity S2 that matches the second jaw T2. When the patient wears the orthodontic appliance assembly 300, the first orthodontic appliance 100 is worn on the first jaw T1 through the first cavity S1, and the second orthodontic appliance 200 is worn on the second jaw T2 through the second cavity S2.

[0064] In this specific embodiment, the first retention portion 11 and the second retention portion 21 are located on the first occlusal surface A1 and the second occlusal surface A2, respectively. When the patient wears the orthodontic appliance assembly 300, the first retention portion 11 and the second retention portion 21 will not interfere with the buccal muscles, which can greatly improve the patient's experience.

[0065] Optionally, the first retention portion 11 is located in the posterior tooth region of the first appliance body 10, and the second retention portion 21 is located in the posterior tooth region of the second appliance body 20, but is not limited thereto.

[0066] Larger first retention portions 11 and second retention portions 21 can be provided in the posterior tooth region. Larger first retention portions 11 and second retention portions 21 can provide more stable connection performance, and can provide more effective orthodontic force in applications such as jaw position adjustment.

[0067] Optionally, the first retention portion 11 may extend along the dental arch in the posterior tooth region to increase the size of the first retention portion 11. For example, the number of teeth covered by one first retention portion 11 may not exceed three, but is not limited thereto.

[0068] Optionally, the first retaining part 11 forms a first chamber S1' that communicates with the first cavity S1, and the second retaining part 21 forms a second chamber S2' that communicates with the second cavity S2. Both the first retaining part 11 and the second retaining part 21 are hollow structures.

[0069] Optionally, the first retention part 11 is integrally formed with the first orthodontic appliance body 10, and the second retention part 21 is integrally formed with the second orthodontic appliance body 20.

[0070] In practical applications, the first orthodontic appliance 100 and the second orthodontic appliance 200 can be formed using a hot-press molding process.

[0071] Taking the first orthodontic appliance 100 as an example, a dental mold with an addendum is provided, and the addendum matches the first retention part 11. Then, a hot-pressed film is used to cover the dental mold and the addendum, and demolding forms the connected first retention part 11 and the first orthodontic appliance body 10, and the first chamber S1' formed by the first retention part 11 is connected to the first cavity S1 formed by the first orthodontic appliance body 10.

[0072] Additives can be formed during the process of generating the dental model, or they can be structures added to the dental model later.

[0073] Similarly, the second retention part 21 and the second orthodontic body 20 can be formed by a hot-pressing film forming process, and the second chamber S2' formed by the second retention part 21 is connected to the second cavity S2 formed by the second orthodontic body 20.

[0074] Optionally, the first orthodontic appliance 100 includes a first filling portion located in the first chamber S1', and the second orthodontic appliance 200 includes a second filling portion located in the second chamber S2', so that the strength of the first retention portion 11 and the second retention portion 21 can be improved by the filling portion.

[0075] Optionally, the first chamber S1' is not filled and is a hollow structure, and the second orthodontic appliance 200 includes a second filling part located in the second chamber S2'. This can improve the strength of the second retention part 21, while ensuring the deformability of the first retention part 11, so that the second retention part 21 can smoothly enter the first retention part 11.

[0076] Optionally, referring to Figures 6 and 7, the first retention part body 12 includes a groove 121, and the second retention part body 22 includes a protrusion 221. When the first orthodontic appliance 100 and the second orthodontic appliance 200 are in an engaged state, the protrusion 221 is confined within the groove 121, thereby restricting the relative movement of the first orthodontic appliance 100 and the second orthodontic appliance 200 in the horizontal plane X.

[0077] The groove 121 includes a bottom wall 1211 corresponding to the first occlusal surface T11 of the first tooth T1 and a surrounding wall 1212 surrounding the first periphery L of the bottom wall 1211. The bottom wall 1211 and the surrounding wall 1212 form a receiving cavity S for accommodating the protrusion 221.

[0078] "The bottom wall 1211 provided corresponding to the first occlusal surface T11 of the first tooth T1" means that the bottom wall 1211 is provided adjacent to the first occlusal surface T11 of the first tooth T1, for example, the bottom wall 1211 is provided face to face with the first occlusal surface T11 of the first tooth T1.

[0079] The first perimeter L of the bottom wall 1211 is a closed ring structure, and the enclosure wall 1212 is an enclosure structure that connects the first perimeter L and protrudes from the bottom wall 1211.

[0080] In the hot-press molding process, the additive is a structure that protrudes from the jaw surface of the dental mold, the groove 121 formed by the hot-press film is a hollow groove, and the surrounding wall 1212 is a hollow structure.

[0081] Optionally, the enclosure 1212 includes at least one of a first enclosure group, a second enclosure group, and a third enclosure group. Multiple enclosures in the first enclosure group cooperate to restrict the relative movement of the first orthodontic appliance 100 and the second orthodontic appliance 200 in the sagittal direction; multiple enclosures in the second enclosure group cooperate to restrict the relative movement of the first orthodontic appliance 100 and the second orthodontic appliance 200 in the horizontal direction; and multiple enclosures in the third enclosure group cooperate to restrict the relative rotation of the first orthodontic appliance 100 and the second orthodontic appliance 200 in the dental arch direction.

[0082] The restriction on the relative movement of the first orthodontic appliance 100 and the second orthodontic appliance 200 in the sagittal and horizontal directions restricts their relative movement within the entire horizontal plane X. The restriction on the relative rotation of the first orthodontic appliance 100 and the second orthodontic appliance 200 in the dental arch direction restricts their relative rotation within the entire horizontal plane X. These restrictions on relative movement and rotation enable the relative movement of the first orthodontic appliance 100 and the second orthodontic appliance 200 within the entire horizontal plane X.

[0083] Optionally, multiple walls in the third wall group may overlap with walls in the first or second wall group. Alternatively, multiple walls in the third wall group may be walls independent of the first and second wall groups.

[0084] Optionally, the multiple walls in the first, second, and third enclosure groups are spaced apart from each other, or at least two of the multiple walls in the first, second, and third enclosure groups are connected.

[0085] "Multiple walls in the first, second, and third enclosure groups" can refer to the walls in the first enclosure group, the walls in the second enclosure group, and the walls in the third enclosure group.

[0086] Optionally, the first perimeter L is formed by four edges L1, L2, L3, and L4 connected in sequence.

[0087] The four edges L1, L2, L3, and L4 include a first edge L1 located on either the buccal or lingual side of the base wall 1211, a third edge L3 located on the other buccal or lingual side of the base wall 1211, a second edge L2 located on the mesial side of the base wall 1211, and a fourth edge L4 located on the proximal and distal sides of the base wall 1211, respectively. The first edge L1, the second edge L2, the third edge L3, and the fourth edge L4 are connected end to end to form the first perimeter L.

[0088] Here, the length of the first edge L1 is greater than the length of the second edge L2, and the length of the first edge L1 is greater than the length of the fourth edge L4, that is, the bottom wall 1211 is roughly a strip-shaped structure extending along the dental arch direction.

[0089] The following describes several implementation forms of the groove 121 and the protrusion 221.

[0090] In the first implementation, referring to Figures 6 to 10, the enclosure 1212 connects to a portion of the first periphery L, that is, in the circumferential direction of the first periphery L, the enclosure 1212 is a semi-closed structure, and the groove 121 is a periphery semi-closed groove.

[0091] The advantages of the semi-closed structure of the surrounding wall 1212 are as follows: (1) The structure of the surrounding wall 1212 has a relatively large deformation amount, which can assist the protrusion 221 to smoothly enter the groove 121, and can assist the first limiting structure 13 and the second limiting structure 23 to cooperate with each other during the process of the protrusion 221 entering the groove 121; (2) The semi-closed structure of the surrounding wall 1212 is equivalent to forming an opening P at the groove 121, which is convenient for the groove 121 structure to be separated from the dental mold during the demolding process in the thermoplastic film forming process.

[0092] Optionally, the surrounding wall 1212 includes a first surrounding wall 12121. A junction area is formed between the first surrounding wall 12121 and the bottom wall 1211, and the junction area is in the shape of "one", "L", "匚" or "冂".

[0093] Optionally, the surrounding wall 1212 includes a first surrounding wall 12121, and the first surrounding wall 12121 is located at least one of the mesial side, distal side, buccal side, and lingual side of the bottom wall 1211.

[0094] Optionally, the first surrounding wall 12121 is a continuous structure extending along the circumferential direction of the first peripheral edge L, and the first surrounding wall 12121 extends from the mesial side through the buccal side to the distal side. Or, the first surrounding wall 12121 extends from the lingual side through the buccal side to the mesial side or the distal side. Or, the first surrounding wall 12121 extends from the lingual side through the buccal side to the lingual side. Or, the first surrounding wall 12121 extends from the mesial side through the lingual side to the distal side. Or, the first surrounding wall 12121 extends from the buccal side through the lingual side to the mesial side or the distal side. Or, the first surrounding wall 12121 extends from the buccal side through the lingual side to the buccal side.

[0095] Optionally, the surrounding wall 1212 further includes a second surrounding wall 12122. The second surrounding wall 12122 is arranged at an interval from the first surrounding wall 12121, and the second surrounding wall 12122 is located on the lingual side or the buccal side of the bottom wall 1211. Through the cooperation of the first surrounding wall 12121 and the second surrounding wall 12122, the wrapping ability of the protrusion 221 can be improved.

[0096] Optionally, the first peripheral edge L is formed by enclosing four edges L1, L2, L3, and L4 connected in sequence. The surrounding wall 1212 includes a first surrounding wall 12121, and the first surrounding wall 12121 connects at least a partial area of one edge. Or, the first surrounding wall 12121 continuously connects at least a partial area of two adjacent edges. Or, the first surrounding wall 12121 continuously connects at least a partial area of three edges. Or, the first surrounding wall 12121 continuously connects partial areas of the four edges.

[0097] "Continuous connection" means that the first surrounding wall 12121 is a continuous structure. On the one hand, the continuous first surrounding wall 12121 can reduce the difficulty of demolding, and on the other hand, it can improve the strength of the first surrounding wall 12121, thereby enhancing the fitting strength between the accommodating cavity S formed by the surrounding walls 1212 and the protrusion 221.

[0098] Combined with FIGS. 7 to 10, they are top views of several specific examples of the surrounding walls 1212.

[0099] In the first specific example, the surrounding wall 1212 includes a first surrounding wall 12121, and the first surrounding wall 12121 connects at least part of the area of one edge. For example, the first surrounding wall 12121 connects the entire area of the third edge L3. At this time, the junction area formed between the first surrounding wall 12121 and the bottom wall 1211 is in the shape of "one", and the first surrounding wall 12121 can also connect other edges.

[0100] In this example, the first surrounding wall 12121 does not extend to the first edge L1, the second edge L2, and the fourth edge L4, and the part of the groove 121 corresponding to the first edge L1, the second edge L2, and the fourth edge L4 is an opening P.

[0101] Combined with FIG. 7, in the second specific example, the surrounding wall 1212 includes a first surrounding wall 12121, and the first surrounding wall 12121 continuously connects at least part of the areas of two adjacent edges. Here, take the first surrounding wall 12121 continuously connecting the entire area of the third edge L3 and the entire area of the fourth edge L4 as an example. At this time, the junction area formed between the first surrounding wall 12121 and the bottom wall 1211 is in the shape of "L". The first surrounding wall 12121 can also connect other two adjacent edges.

[0102] In this example, the first surrounding wall 12121 does not extend to the first edge L1 and the second edge L2, and the part of the groove 121 corresponding to the first edge L1 and the second edge L2 is an opening P.

[0103] Combined with FIG. 8, in the third specific example, the surrounding wall 1212 includes a first surrounding wall 12121, and the first surrounding wall 12121 continuously connects at least part of the areas of three edges. Here, take the first surrounding wall 12121 continuously connecting the entire area of the second edge L2, the entire area of the third edge L3, and the entire area of the fourth edge L4 as an example. At this time, the junction area formed between the first surrounding wall 12121 and the bottom wall 1211 is in the shape of "匚", and the first surrounding wall 12121 can also connect other three adjacent edges.

[0104] In this example, the first surrounding wall 12121 does not extend to the first edge L1, and the part of the groove 121 corresponding to the first edge L1 is an opening P.

[0105] In the third specific example, the first surrounding wall 12121 is a continuous structure extending along the circumferential direction of the first periphery L. The first surrounding wall 12121 extends from the mesial side through the buccal side to the distal side. In other specific examples, the first surrounding wall 12121 can also be in other extended forms.

[0106] Referring to FIG. 9, in the fourth specific example, the surrounding wall 1212 includes a first surrounding wall 12121 and a second surrounding wall 12122. The main difference between the fourth specific example and the third specific example is that: the fourth specific example further includes a second surrounding wall 12122 located at the first edge L1, and the second surrounding wall 12122 is arranged at an interval from the first surrounding wall 12121.

[0107] Optionally, the second surrounding wall 12122 can be located in the middle of the first edge L1.

[0108] Referring to FIGS. 10 and 11, in the fifth specific example, the surrounding wall 1212 includes a first surrounding wall 12121, and the first surrounding wall 12121 continuously connects partial regions of four edges. Here, taking the first surrounding wall 12121 continuously connecting partial regions of the first edge L1, all regions of the second edge L2, all regions of the third edge L3, and all regions of the fourth edge L4 as an example. At this time, the junction area formed between the first surrounding wall 12121 and the bottom wall 1211 is in a "冂" shape.

[0109] In this example, the first surrounding wall 12121 does not completely connect the first periphery L, and the partial region of the groove 121 corresponding to the first edge L1 is an opening P.

[0110] In the fifth specific example, the first surrounding wall 12121 is a continuous structure extending along the circumferential direction of the first periphery L. The first surrounding wall 12121 extends from the lingual side through the buccal side to the distal side. In other specific examples, the first surrounding wall 12121 can also be in other extended forms.

[0111] In the fifth specific example, the connection of the first surrounding wall 12121 to the four edges can greatly improve the strength of the formed groove 121, and further enhance the fitting strength between the groove 121 formed by the surrounding wall 1212 and the protrusion 221. Moreover, an opening P is formed at one edge of the groove 121, and the opening P can ensure the deformable amount of the groove 121.

[0112] Optionally, the first surrounding wall 12121 includes a starting end 12121' and a terminating end 12121", and the starting end 12121' and the terminating end 12121" are two ends of the first surrounding wall 12121 in the circumferential direction of the first periphery L.

[0113] The starting end 12121' is located at the first edge L1, and the terminating end 12121" is located at the first edge L1 or the fourth edge L4.

[0114] Referring to FIG. 10, when the starting end 12121' is located at the first edge L1, the first surrounding wall 12121 forms a corner structure at the connection of the first edge L1 and the second edge L2, and the corner structure can partially wrap the protrusion 221 accommodated in the groove 121.

[0115] Referring to FIG. 10, when the terminating end 12121" is located at the fourth edge L4, the first surrounding wall 12121 does not continue to extend through the fourth edge L4 to the first edge L1, that is, no corner structure is formed at the connection of the fourth edge L4 and the first edge L1.

[0116] Referring to FIG. 11, when the terminating end 12121" is located at the first edge L1, the surrounding wall 1212 also forms a corner structure at the connection of the fourth edge L4 and the first edge L1, so as to further wrap the protrusion 221.

[0117] Optionally, the first edge L1 of the present specific example is the edge located on the lingual side of the bottom wall 1211, but not limited thereto. For example, the first edge L1 can also be the edge located on the buccal side of the bottom wall 1211.

[0118] Referring to FIG. 12, in the sixth specific example, the surrounding wall 1212 includes a first surrounding wall 12121 and a second surrounding wall 12122. The main difference between the sixth specific example and the fifth specific example is that: the sixth specific example further includes a second surrounding wall 12122 located at the first edge L1, and the second surrounding wall 12122 is arranged at an interval from the first surrounding wall 12121.

[0119] Optionally, the second surrounding wall 12122 can be located in the middle of the first edge L1.

[0120] In the second implementation form, referring to FIGS. 13 to 15, the surrounding wall 1212 connects all regions of the first peripheral edge L. That is, in the circumferential direction of the first peripheral edge L, the surrounding wall 1212 is a fully enclosed structure, and the groove 121 is a peripherally fully enclosed groove.

[0121] The advantage of the surrounding wall 1212 in the form of a fully enclosed structure is that: the surrounding wall 1212 can achieve all-round wrapping of the protrusion 221, thereby improving the stability of the cooperation between the groove 121 and the protrusion 221.

[0122] Optionally, a junction area is formed between the surrounding wall 1212 and the bottom wall 1211, and the junction area is in the shape of a "mouth".

[0123] Optionally, in the circumferential direction of the first peripheral edge L, the surrounding wall 1212 includes a first region 1213 and a second region 1214, and both the first region 1213 and the second region 1214 are regions directly connected to the first peripheral edge L.

[0124] The deformability of the first region 1213 is less than that of the second region 1214. The second region 1214 has a larger deformability, which can help the protrusion 221 to smoothly enter the groove 121, and can also assist the first limiting structure 13 and the second limiting structure 23 to cooperate with each other during the process of the protrusion 221 entering the groove 121.

[0125] Optionally, the deformability of different regions of the enclosure 1212 can be controlled by controlling the thickness and hardness of the material forming the enclosure 1212. Alternatively, different structures can be formed in different regions of the enclosure 1212 to control the deformability of different regions of the enclosure 1212, but this is not a limitation.

[0126] Figures 14 and 15 are schematic diagrams of several specific examples of enclosure 1212.

[0127] Referring to Figure 14, in the first specific example, in the vertical direction Z, the first region 1213 of the enclosure 1212 has a first average height, and the second region 1214 has a second average height, with the first average height being greater than the second average height. That is, the second region 1214 is lower in height than the first region 1213.

[0128] Neither the first region 1213 nor the second region 1214 has a part with zero height. The enclosure 1212 still connects to the entire area of ​​the first perimeter L, and the groove 121 is still a fully enclosed groove around the perimeter.

[0129] Optionally, taking the first region 1213 and the second region 1214 as an example to form a wall 1212. The first region 1213 extends from the mesial side through the buccal side to the distal side. Alternatively, the first region 1213 extends from the lingual side through the buccal side to the mesial or distal side. Alternatively, the first region 1213 extends from the lingual side through the buccal side to the lingual side. Alternatively, the first region 1213 extends from the mesial side through the lingual side to the distal side. Alternatively, the first region 1213 extends from the buccal side through the lingual side to the mesial or distal side. Alternatively, the first region 1213 extends from the buccal side through the lingual side to the buccal side.

[0130] In the first specific example, the first region 1213 continuously connects the second edge L2, the third edge L3, and the second edge L4 of the first periphery L, extending from the lingual side through the buccal side to the distal side. The second region 1214 connects to the first edge L1. As can be seen, the height of the second region 1214 in Figure 14 is relatively small.

[0131] In other specific examples, the second region 1214 may also be connected to the third edge L3, and the first region 1213 and the second region 1214 may also be regions that are spaced apart from each other, that is, the enclosure 1212 also includes other regions.

[0132] Optionally, in this specific example, the first edge L1 is the edge located on the lingual side of the base wall 1211. However, this is not a limitation; for example, the first edge L1 could also be the edge located on the buccal side of the base wall 1211.

[0133] In this specific example, since the enclosure 1212 is not a standard structure, the enclosure 1212 itself has ups and downs in the vertical Z direction. "The first average height is greater than the second average height" means that the overall height of the first area 1213 is higher and the overall height of the second area 1214 is lower. The second area 1214 can be regarded as the area formed by hollowing out part of the first area 1213.

[0134] The smaller height of the second region 1214 is equivalent to forming a slot P1 on the side of the enclosure 1212 away from the first occlusal surface T11 of the first occlusal surface, which can increase the deformability of the second region 1214.

[0135] Referring to Figure 14, in the second specific example, the second region 1214 includes a second region body 1215 and at least one slot P1 extending through the second region body 1215 in the thickness direction of the surrounding wall 1212. The second region body 1215 includes a top surface 1216 of a first occlusal surface T11 away from the first occlusal surface T11, and the slot P1 extends through the top surface 1216.

[0136] The slot P1 does not penetrate the end face of the second area body 1215 that connects to the first periphery L, that is, the enclosure 1212 still connects to the entire area of ​​the first periphery L, and the groove 121 is still a fully enclosed groove on the periphery.

[0137] Optionally, taking the enclosure 1212 formed by the first region 1213 and the second region 1214 as an example, the first region 1213 of the enclosure 1212 is continuously connected to the second edge L2, the third edge L3, and the second edge L4 of the first perimeter L. The second region 1214 is connected to the first edge L1. As can be seen, a slot P1 is formed above the second region 1214 in Figure 14, which can increase the deformability of the second region 1214.

[0138] Referring to Figure 15, in the third specific example, the second region 1214 includes a second region body 1215 and at least one slot P1 extending through the second region body 1215 in the thickness direction of the surrounding wall 1212. The second region body 1215 includes a top surface 1216 of a first occlusal surface T11 away from the first occlusal surface T11, and the slot P1 extends through the top surface 1216.

[0139] The difference between the third specific example and the second specific example is that: the second area 1214 of the second specific example only includes one slotted P1, while the second area 1214 of the third specific example includes multiple slotted P1s distributed at intervals. The design of the multiple slotted P1s can take into account both the deformability of the second area 1214 and the wrapping ability of the second area 1214 for the protrusion 221.

[0140] Compared with the opening P in the first implementation form, the slotted P1 in the second implementation form can be regarded as a structure formed by hollowing out a partial area of the surrounding wall 1212 in the vertical direction Z, and the opening P can be regarded as a structure formed by hollowing out the entire area of the surrounding wall 1212 in the vertical direction Z. The height of the surrounding wall 1212 corresponding to the slotted P1 is higher than the height of the surrounding wall 1212 corresponding to the opening P. In the thermoplastic film forming process, the slotted P1 solution can reduce the difficulty of thermoforming, making the formed groove 121 structure more conforming to the additive.

[0141] In the third implementation form, referring to FIG. 16, the first retaining part body 12 further includes an additional protrusion 122 connecting the groove 121, and the second retaining part body 22 further includes an additional groove 222 connecting the protrusion 221. When the first orthodontic appliance 100 and the second orthodontic appliance 200 are in an occlusal state, the protrusion 221 is limited in the groove 121 and the additional protrusion 122 is limited in the additional groove 222, thereby restricting the relative movement of the first orthodontic appliance 100 and the second orthodontic appliance 200 in the horizontal plane X.

[0142] Between the first retaining part body 12 and the second retaining part body 22 in the third implementation form, there are equivalent to two sets of groove-protrusion matching structures, which can further improve the stability of the cooperation between the first retaining part body 12 and the second retaining part body 22.

[0143] The groove 121 is in a "C" shape, and the additional protrusion 122 connects one side surrounding wall 1211 of the groove 121. The cross-section of the connected groove 121 and additional protrusion 122 in the horizontal plane X is approximately in a "6" shape.

[0144] The additional groove 222 is in a "C" shape, and the protrusion 221 connects one side surrounding wall of the additional groove 222. The cross-section of the connected additional groove 222 and protrusion 221 in the horizontal plane X is approximately in a "9" shape.

[0145] The mutual cooperation between the "6"-shaped first retaining part body 12 and the "9"-shaped second retaining part body 22 can further improve the stability.

[0146] Optionally, referring to FIG. 17, the shape of the first peripheral edge L of the bottom wall 1211 can be designed according to the contour line L' shape of the first occlusal surface A1.

[0147] The outline L' of the first occlusal surface A1 is wavy. The outline L' of the first occlusal surface A1 includes a first outline L1' adjacent to the first edge L1 and a third outline L3' adjacent to the third edge L3. The shape of the first outline L1' matches the shape of the first edge L1, and the shape of the third outline L3' matches the shape of the third edge L3.

[0148] "The shape of the first contour line L1' matches the shape of the first edge L1" means that the extended shape of the first edge L1 is roughly consistent with the extended shape of the first contour line L1', so that the bottom wall 1211 has a sufficient proportion of teeth to provide sufficient support for the groove 121, so as to ensure that the groove 121 can stably withstand the biting pressure.

[0149] Optionally, a recessed structure that does not match the first contour line L1 can be additionally designed at the first edge L1 to further ensure that the subsequently formed groove 121 can stably withstand the biting pressure.

[0150] The explanation of "the shape of the third contour line L3' matches the shape of the third edge L3" can be found in the explanation of "the shape of the first contour line L1' matches the shape of the first edge L1", and will not be repeated here.

[0151] Optionally, when the shape of the bottom wall 1211 is designed as a wave shape based on the contour line L' of the first occlusal surface A1, the outer contour line of the corresponding wall 1212 in the horizontal plane X is also wave-shaped, and the outer contour line of the corresponding protrusion 221 in the horizontal plane X can also be wave-shaped. Referring to the foregoing description, the protrusion 221 can also have a sufficient proportion of teeth below it to provide sufficient support for the protrusion 221, so as to ensure that the protrusion 221 can stably withstand the occlusal pressure.

[0152] Optionally, the shape of the bottom wall 1211 may not follow the outline L' shape of the first occlusal surface A1. For example, the bottom wall 1211 may be designed as a roughly square shape.

[0153] Optionally, the inner contour of the groove 121 matches the outer contour of the protrusion 221, which can improve the stability of the fit between the groove 121 and the protrusion 221.

[0154] Optionally, referring to Figure 18, the bottom wall 1211 of the groove 121 is in close contact with the first occlusal surface T11 of the first tooth T1. Alternatively, referring to Figure 19, there is a gap S' between the bottom wall 1211 and the first occlusal surface T11 of the first tooth T1.

[0155] The protrusion 221 includes a top 2211 on the second occlusal surface T21, which is away from the second occlusal surface T21. The shape of the bottom wall 1211 matches the shape of the top 2211. When the first orthodontic appliance 100 and the second orthodontic appliance 200 are in occlusal position, the bottom wall 1211 and the top 2211 abut against each other. The matching shape of the bottom wall 1211 and the top 2211 can improve the stability of the abutment.

[0156] Referring to Figure 18, when the bottom wall 1211 of the groove 121 is in close contact with the first occlusal surface T11 of the first tooth T1, the shape of the bottom wall 1211 matches the shape of the first occlusal surface T11 of the first tooth T1. The bottom wall 1211 may include an anatomical shape that matches the first occlusal surface T11 of the first tooth T1, and the shape of the top 2211 matches the shape of the bottom wall 1211, that is, the top 2211 may also include this anatomical shape.

[0157] Referring to Figure 19, when there is a gap S' between the bottom wall 1211 of the groove 121 and the first occlusal surface T11 of the first tooth T1, the shape of the bottom wall 1211 does not have to match the shape of the first occlusal surface T11 of the first tooth T1. The shape of the bottom wall 1211 can be designed according to the needs, and the shape of the top 2211 matches the shape of the bottom wall 1211.

[0158] Here, it is equivalent to raising the bottom wall 1211. In the hot pressing molding process, raising the bottom wall can reduce the difficulty of hot pressing molding and make the molded groove 121 structure fit the added part better.

[0159] Optionally, referring to Figures 18 and 19, the enclosure 1212 includes a first end face 1217 on a first occlusal surface T11 away from the first occlusal surface T11, and at least a portion of the first end face 1217 has a shape that matches the shape of the second occlusal surface A2. When the first orthodontic appliance 100 and the second orthodontic appliance 200 are in occlusal position, at least a portion of the first end face 1217 abuts against the second occlusal surface A2, and the matching shape of the first end face 1217 and the second occlusal surface A2 can improve the stability of the abutment.

[0160] Optionally, referring to Figures 18 to 21, the first limiting structure 13 is connected to the inner side 1218 of the enclosure 1212, and the second limiting structure 23 is connected to the outer side 2212 of the protrusion 221. One of the first limiting structure 13 and the second limiting structure 23 is a notch, and the other is a convex ridge.

[0161] Optionally, the explanation can be based on the example of the first limiting structure 13 being a notch 13 and the second limiting structure 23 being a convex ridge 23.

[0162] Referring to Figure 18, in the first example, the first limiting structure 13 is a notch 13, which is formed by the cooperation of a first protrusion 131 and a second protrusion 132 protruding from the inner side surface 1218 of the surrounding wall 1212 toward the receiving cavity S. That is, the area between the first protrusion 131 and the second protrusion 132 is the notch 13, and the size of the notch 13 can be adapted to the size of the protrusion 23.

[0163] The second protrusion 132 is closer to the bottom wall 1211 than the first protrusion 131.

[0164] The second protrusion 132 is connected to the bottom wall 1211, and the end face 1311 of the first protrusion 131 away from the bottom wall 1211 is connected to the first end face 1217 of the enclosure wall 1212.

[0165] Optionally, the end face 1311 and the first end face 1217 can be smoothly transitioned, and the shape of the overall surface formed by the end face 1311 and the first end face 1217 can match the shape of the second occlusal surface A2. When the first orthodontic appliance 100 and the second orthodontic appliance 200 are in an occlusal state, the matching overall surface and the second occlusal surface A2 can improve the stability of the contact.

[0166] Referring to Figure 20, in the second example, the first limiting structure 13 is a notch. The notch is formed by the cooperation of a first protrusion 131 protruding towards the inner side 1218 of the surrounding wall 1212 and the bottom wall 1211. That is, the area between the first protrusion 131 and the bottom wall 1211 is the notch 13, and the size of the notch 13 can be adapted to the size of the protrusion 23.

[0167] The main difference between the second example and the first example is that the second example transforms the two protrusions in the first example into one protrusion, and the notch 13 is formed directly by the cooperation between the first protrusion 131 and the bottom wall 1211.

[0168] The end face 1311 of the first protrusion 131 away from the bottom wall 1211 is connected to the first end face 1217 of the enclosure wall 1212.

[0169] Further explanations for the second example can be found in the first example, and will not be repeated here.

[0170] Optionally, referring to Figure 21, the second limiting structure 23 is a protruding ridge 23. The protruding ridge 23 connects to the top 2211 of the protrusion 221, which can effectively reduce the depth of the receiving cavity S of the groove 121 in the vertical direction Z.

[0171] The protrusion 221 is formed by the outer side 2212 and the top 221.

[0172] When the bottom wall 1211 of the groove 121 is set close to the first occlusal surface T11 of the first tooth T1, both the bottom wall 1211 of the groove 121 and the top 2211 of the protrusion 221 have corresponding anatomical shapes. That is, the top 2211 is irregular in shape at this time, and the top surface of the ridge 23 needs to be adapted to this anatomical shape to ensure that the top surface of the ridge 23 and the top 2211 are continuous anatomical surfaces as much as possible, thereby ensuring the stability of the fit between the ridge 23 and the recess 13.

[0173] Optionally, considering factors such as the locking effect, the elastic modulus of the diaphragm, the molding difficulty, and the demolding difficulty, it is necessary to design grooves 121, protrusions 221, notches 13, and ridges 23 of appropriate size.

[0174] Optionally, referring to Figure 22, the thickness D of the enclosure 1212 ranges from 0.5mm to 3mm. This is mainly because the enclosure 1212 is a hollow structure formed by hot pressing film, and the thickness of the added parts and the film thickness need to be taken into account.

[0175] The protruding ridge 23 has a first height H in the vertical direction Z, and the protruding ridge 23 has a first width W that protrudes from the outer side surface 2212 of the protrusion 221. The first height H is not less than 0.5 mm, and the first width W is between 0.3 mm and 1.2 mm.

[0176] When the first width W of the protruding ridge 23 is designed to be <0.3mm, a distinct protruding ridge 23 cannot be formed after demolding, affecting the subsequent locking effect between the protruding ridge 23 and the notch 13. When the first width W of the protruding ridge 23 is designed to be >1.2mm, the forming effect of the protruding ridge 23 is poor (for example, material residue will remain at the position of the protruding ridge 23) and normal demolding is not possible. When the first width W of the protruding ridge 23 is designed to be 0.3mm≤W≤1.2mm, the forming effect of the protruding ridge 23 is better, and normal demolding is possible.

[0177] When the first height H of the protruding ridge 23 is designed to be <0.5mm, a distinct protruding ridge 23 cannot be formed after demolding, affecting the subsequent locking effect between the protruding ridge 23 and the notch 13. When the first height H is designed to be ≥0.5mm, the forming effect of the protruding ridge 23 is better, and demolding can be performed normally.

[0178] Optionally, at least one of the notch 13 or the ridge 23 has a guide surface for assisting the ridge 23 to slide into the notch 13. The guide surface is a bevel or an arc surface.

[0179] For example, referring to Figures 23 and 24, a guide surface 1312 can be formed at the end face 1311 of the first protrusion 131 away from the bottom wall 1211. The guide surface 1312 can be the inclined surface shown in Figure 23 or the arc surface shown in Figure 24, but is not limited thereto.

[0180] The guide surface may not be provided at the end face 1311 of the first protrusion 131 away from the bottom wall 1211, as shown in Figure 25, where the end face 1311 is a plane.

[0181] Optionally, referring to Figure 26, the first limiting structure 13 (i.e., the notch 13) is a continuous structure connecting the entire enclosure 1212 along the circumferential direction of the first perimeter L, that is, a continuous notch 13 is provided at the entire enclosure 1212. The first protrusion 131 forming the notch 13 is provided around the entire first end face 1217 of the enclosure 1212, and the notch 13 provides sufficient locking range for the protruding ridge 23.

[0182] Alternatively, referring to Figure 27, the first retaining part 11 includes two first limiting structures 13 (i.e., two notches 13) spaced apart. The two notches 13 are arranged facing each other, and the two notches 13 arranged facing each other can cooperate with each other to prevent the protrusion 23 from disengaging from the notch 13.

[0183] Specifically, the two first protrusions 131 are located on opposite sides of the first end face 1217. At this time, the two first protrusions 131 are arranged face to face. Figure 27 takes the example of the two first protrusions 131 being located on the proximal and distal sides of the first end face 1217, but this is not a limitation.

[0184] The distribution of the notches 13 can be determined according to the actual situation and is not limited to the above description. The protruding ridges 23 can be set to correspond to the notches 13, but are not limited to this, and the protruding ridges 23 can also be designed freely. For example, when the notches 13 are a continuous structure, multiple protruding ridges 23 can be designed at intervals to match the notches 13.

[0185] Optionally, referring to Figure 28, the groove 121 protrudes from the first occlusal surface A1 along the first direction Z1, and the first direction Z1 forms a first angle θ1 with the first occlusal plane X1 of the first tooth T1.

[0186] The protrusion 221 protrudes from the second occlusal surface A2 along the second direction Z2. The second direction Z2 and the second occlusal plane X2 of the second tooth T2 form a second included angle θ2. The first included angle θ1 is equal to the second included angle θ2.

[0187] The groove 121 and the protrusion 221 have the same protruding direction, which can avoid excessive interference when the protrusion 221 enters the groove 121.

[0188] It should be noted that it is only necessary to ensure that the part of the protrusion 221 that enters the groove 121 has the same protrusion direction as the groove 121.

[0189] Referring to Figure 29, the second retention part body 22 also includes an extension 223 connecting the protrusion 221 and the second occlusal surface A2. When the first orthodontic appliance 100 and the second orthodontic appliance 200 are in an occlusal state, the protrusion 221 is confined to the groove 121, and the extension 223 is located outside the groove 121.

[0190] Here, the extension segment 223 can be customized according to the actual situation. The extension direction of the extension segment 223 and the extension direction of the protrusion 221 can be designed independently to adapt to more application scenarios.

[0191] For example, when the distance between the first occlusal surface A1 and the second occlusal surface A2 is large, the protrusion 221 can be made to more easily approach the groove 121 by providing a suitable extension 223.

[0192] Optionally, referring to Figure 30, the orthodontic appliance assembly 300 includes a first hemi-maxillary region C1 and a second hemi-maxillary region C2 located on either side of the dental midline C. The appliance assembly 300 includes at least two sets of retention portions 31 and 32, each set including a first retention portion 11 and a second retention portion 21. The two sets of retention portions 31 and 32 include a first retention portion 31 and a second retention portion 32, with the first retention portion 31 located in the posterior tooth region of the first hemi-maxillary region C1, and the second retention portion 32 located in the posterior tooth region of the second hemi-maxillary region C2. This allows for simultaneous positioning of the first hemi-maxillary region C1 and the second hemi-maxillary region C2, thereby improving the overall stability of the orthodontic appliance assembly 300.

[0193] Optionally, the first retention group 31 and the second retention group 32 may have the same structure, and the number of retention groups included in the posterior tooth region of the first semi-maxillary region C1 and the posterior tooth region of the second semi-maxillary region C2 may be the same. However, this is not a limitation; the first retention group 31 and the second retention group 32 may have different structures, and the number of retention groups included in the posterior tooth region of the first semi-maxillary region C1 and the posterior tooth region of the second semi-maxillary region C2 may be different. For example, as shown in Figure 30, the posterior tooth region of the first semi-maxillary region C1 has two first retention groups 31, and the posterior tooth region of the second semi-maxillary region C2 has one second retention group 32, with the structures of the first retention group 31 and the second retention group 32 being different.

[0194] Optionally, referring to Figure 30, the orthodontic appliance assembly 300 further includes at least one additional positioning group 33. The additional positioning group 33 includes a first positioning part 331 located in the anterior tooth region of the first orthodontic appliance body 10 and a second positioning part 332 located in the anterior tooth region of the second orthodontic appliance body 20. When the first orthodontic appliance 100 and the second orthodontic appliance 200 are in an occlusal state, the first positioning part 331 and the second positioning part 332 mutually limit each other. The number and location of the additional positioning group 33 can be determined according to the actual situation.

[0195] Optionally, referring to Figures 31 and 32, the first positioning part 331 is located on the first lingual surface B1 of the first orthodontic appliance body 10, and the second positioning part 332 is located on the second lingual surface B2 of the second orthodontic appliance body 20. The first positioning part 331 includes a first positioning part body 3311 connected to the first lingual surface B1 and a first stop structure 3312 connected to the first positioning part body 3311. The second positioning part 332 includes a second positioning part body 3321 connected to the second lingual surface B2 and a second stop structure 3322 connected to the second positioning part body 3321. When the first orthodontic appliance 100 and the second orthodontic appliance 200 are in an engaged state, the first positioning part body 3311 and the second positioning part body 3321 cooperate to restrict the relative movement of the first orthodontic appliance 100 and the second orthodontic appliance 200 in the horizontal plane X, and the first stop structure 3312 and the second stop structure 3322 cooperate to restrict the relative movement of the first orthodontic appliance 100 and the second orthodontic appliance 200 in the vertical direction Z.

[0196] The first lingual surface B1 is in close contact with the lingual surface of the first jaw, and the second lingual surface B2 is in close contact with the lingual surface of the second jaw.

[0197] The first positioning part body 3311 includes a recess 3313, and the second positioning part body 3321 includes a protrusion 3323. When the first orthodontic appliance 100 and the second orthodontic appliance 200 are in an engaged state, the protrusion 3323 is confined within the recess 3313, thereby restricting the relative movement of the first orthodontic appliance 100 and the second orthodontic appliance 200 in the horizontal plane X.

[0198] The first stop structure 3312 connects to the inner side of the recess 3313, and the second stop structure 3322 connects to the outer side of the protrusion 3323. One of the first stop structure 3312 and the second stop structure 3322 is a recess, and the other is a protrusion.

[0199] The stability of the entire orthodontic appliance assembly 300 can be improved by using the first retention part 11 and the second retention part 21 in the posterior tooth region and the first positioning part 331 and the second positioning part 332 in the anterior tooth region.

[0200] Optionally, in conjunction with Figures 33 to 36b, the orthodontic appliance assembly 300 may further include an auxiliary positioning structure 60 located between the first orthodontic appliance body 10 and the second orthodontic appliance body 20.

[0201] Referring to Figures 33 and 34b, the auxiliary positioning structure 60 includes a first auxiliary positioning structure 61 connecting the first retention part 11 and the first positioning part 331. The first auxiliary positioning structure 61 is integrally formed with the first orthodontic appliance body 10, and the end face 611 of the first auxiliary positioning structure 61 away from the first orthodontic appliance body 10 matches with the second orthodontic appliance body 20. When the first orthodontic appliance 100 and the second orthodontic appliance 200 are in an occlusal state, the end face 611 of the first auxiliary positioning structure 61 cooperates with the second orthodontic appliance body 20 to improve occlusal stability.

[0202] Optionally, the first auxiliary positioning structure 61 and the first fixing part 11 can be spaced apart, and the first auxiliary positioning structure 61 and the first positioning part 331 can be spaced apart.

[0203] Referring to Figures 35 to 36b, the auxiliary positioning structure 60 includes a first auxiliary positioning structure 61 connecting the first fixing part 11 and the first positioning part 331, and a second auxiliary positioning structure 62 connecting the second fixing part 21 and the second positioning part 332.

[0204] The first auxiliary positioning structure 61 is integrally formed with the first orthodontic appliance body 10, and the second auxiliary positioning structure 62 is integrally formed with the second orthodontic appliance body 20. The end face 611 of the first auxiliary positioning structure 61 away from the first orthodontic appliance body 10 and the end face 621 of the second auxiliary positioning structure 62 away from the second orthodontic appliance body 20 match each other. When the first orthodontic appliance 100 and the second orthodontic appliance 200 are in an occlusal state, the end face 611 of the first auxiliary positioning structure 61 and the end face 621 of the second auxiliary positioning structure 62 cooperate with each other to improve occlusal stability.

[0205] Optionally, the first auxiliary positioning structure 61 and the first fixing part 11 can be spaced apart, and the first auxiliary positioning structure 61 and the first positioning part 331 can be spaced apart. The second auxiliary positioning structure 62 and the second fixing part 21 can be spaced apart, and the second auxiliary positioning structure 62 and the second positioning part 332 can be spaced apart.

[0206] In summary, the first embodiment of this application connects the first orthodontic appliance 100 and the second orthodontic appliance 200 through the first retention part 11 and the second retention part 21. The first retention part body 12 and the first limiting structure 13 are located in the same first retention part 11, and the second retention part body 22 and the second limiting structure 23 are located in the same second retention part 21. Through the mutual cooperation of the first retention part 11 and the second retention part 21, the mutual cooperation of the first retention part body 12 and the second retention part body 22 and the mutual cooperation of the first limiting structure 13 and the second limiting structure 23 can be realized simultaneously. That is, the relative movement of the first orthodontic appliance 100 and the second orthodontic appliance 200 in the horizontal plane X and the vertical direction Z can be realized simultaneously. This embodiment achieves multi-dimensional limiting through a simple structure, which greatly improves the connection stability between the first orthodontic appliance 100 and the second orthodontic appliance 200, thereby improving the corresponding orthodontic effect and making it convenient for patients to wear themselves.

[0207] In addition, the first retention part 11 and the second retention part 21 of this specific embodiment are located on the first occlusal surface A1 and the second occlusal surface A2, respectively. When the patient wears the orthodontic appliance assembly 300, the first retention part 11 and the second retention part 21 will not interfere with each other with the lip and cheek muscles, which can greatly improve the patient experience.

[0208] Referring to Figures 37 to 42, a second specific embodiment of this application provides an orthodontic appliance assembly 300.

[0209] In the second embodiment, the first retention part 11 is located on the first lingual surface B1 of the anterior tooth region of the first orthodontic appliance body 10, and the first retention part body 12 is connected to the first lingual surface B1. The second retention part 21 is located on the second lingual surface B2 of the anterior tooth region of the second orthodontic appliance body 20, and the second retention part body 20 is connected to the second lingual surface B2.

[0210] The main difference between the second embodiment and the first embodiment is that the first retention part 11 and the second retention part 21 in the second embodiment are located on the lingual surface of the anterior teeth of the first appliance body 10 and the second appliance body 20, respectively.

[0211] In this specific embodiment, the first retention part 11 and the second retention part 21 are located on the first lingual surface B1 and the second lingual surface B2, respectively. When the patient wears the orthodontic assembly 300, the first retention part 11 and the second retention part 21 will not interfere with the lip and cheek muscles, which can greatly improve the patient experience.

[0212] Optionally, the first retaining part 11 forms a first chamber S1' that communicates with the first cavity S1, and the second retaining part 21 forms a second chamber S2' that communicates with the second cavity S2. Both the first retaining part 11 and the second retaining part 21 are hollow structures.

[0213] Optionally, the first retention part 11 is integrally formed with the first orthodontic appliance body 10, and the second retention part 21 is integrally formed with the second orthodontic appliance body 20.

[0214] In practical applications, the first orthodontic appliance 100 and the second orthodontic appliance 200 can be formed using a hot-press molding process.

[0215] Taking the first orthodontic appliance 100 as an example, a dental mold with an addendum is provided. The addendum matches the first retention part 11. Then, a hot-pressing film is used to cover the dental mold and the addendum. Demolding will form the connected first retention part 11 and the first orthodontic appliance body 10. The first chamber S1' formed by the first retention part 11 is connected to the first cavity S1 formed by the first orthodontic appliance body 10.

[0216] Additives can be formed during the process of generating the dental model, or they can be structures added to the dental model later.

[0217] Similarly, the second retention part 21 and the second orthodontic body 20 can be formed by a hot-pressing film forming process, and the second chamber S2' formed by the second retention part 21 is connected to the second cavity S2 formed by the second orthodontic body 20.

[0218] Optionally, the first orthodontic appliance 100 includes a first filling portion located in the first chamber S1', and the second orthodontic appliance 200 includes a second filling portion located in the second chamber S2', so that the strength of the first retention portion 11 and the second retention portion 21 can be improved by the filling portion.

[0219] Optionally, the first chamber S1' is not filled and is a hollow structure, and the second orthodontic appliance 200 includes a second filling part located in the second chamber S2'. This can improve the strength of the second retention part 21, while ensuring the deformability of the first retention part 11, so that the second retention part 21 can smoothly enter the first retention part 11.

[0220] Optionally, referring to Figures 41 and 42, the first retention part body 12 includes a groove 121, and the second retention part body 22 includes a protrusion 221. When the first orthodontic appliance 100 and the second orthodontic appliance 200 are in an engaged state, the protrusion 221 is confined within the groove 121, thereby restricting the relative movement of the first orthodontic appliance 100 and the second orthodontic appliance 200 in the horizontal plane X.

[0221] The groove 121 includes a bottom wall 1211 and a surrounding wall 1212 arranged around the first periphery L of the bottom wall 1211. The bottom wall 1211 and the surrounding wall 1212 form a receiving cavity S for receiving the protrusion 221.

[0222] Optionally, the bottom wall 1211 connects to the first tongue surface B1 and extends away from the first tongue surface B1. The bottom wall 1211 may, for example, be parallel to the horizontal plane X. The surrounding wall 1212 and the bottom wall 1211 can directly enclose to form the receiving cavity S. Alternatively, the first tongue surface B1 can form the receiving cavity S together with the surrounding wall 1212 and the bottom wall 1211, which simplifies the forming of the receiving cavity S.

[0223] The first perimeter L of the bottom wall 1211 is a closed ring structure, and the enclosure wall 1212 is an enclosure structure that connects the first perimeter L and protrudes from the bottom wall 1211.

[0224] In the hot-press molding process, the additive is a structure that protrudes from the jaw surface of the dental mold, the groove 121 formed by the hot-press film is a hollow groove, and the surrounding wall 1212 is a hollow structure.

[0225] Optionally, the enclosure 1212 includes at least one of a first enclosure group, a second enclosure group, and a third enclosure group. The enclosures in the first enclosure group cooperate to restrict the relative movement of the first orthodontic appliance 100 and the second orthodontic appliance 200 in the sagittal direction. The enclosures in the second enclosure group cooperate to restrict the relative movement of the first orthodontic appliance 100 and the second orthodontic appliance 200 in the horizontal direction. The enclosures in the third enclosure group cooperate to restrict the relative rotation of the first orthodontic appliance 100 and the second orthodontic appliance 200 in the arch direction.

[0226] The restriction on the relative movement of the first orthodontic appliance 100 and the second orthodontic appliance 200 in the sagittal and horizontal directions restricts their relative movement within the entire horizontal plane X. The restriction on the relative rotation of the first orthodontic appliance 100 and the second orthodontic appliance 200 in the dental arch direction restricts their relative rotation within the entire horizontal plane X. These restrictions on relative movement and rotation enable the relative movement of the first orthodontic appliance 100 and the second orthodontic appliance 200 within the entire horizontal plane X.

[0227] Optionally, multiple walls in the third wall group may overlap with walls in the first or second wall group. Alternatively, multiple walls in the third wall group may be walls independent of the first and second wall groups.

[0228] Optionally, the walls in the first, second, and third enclosure groups are spaced apart from each other. Alternatively, at least two walls in the first, second, and third enclosure groups are connected.

[0229] "Multiple walls in the first, second, and third enclosure groups" can refer to the walls in the first enclosure group, the walls in the second enclosure group, and the walls in the third enclosure group.

[0230] Optionally, as shown in FIG. 43, the first periphery L is formed by four successively connected edges L1, L2, L3, and L4.

[0231] In the direction of the dental arch, the bottom wall 1211 includes a first side and a second side that are oppositely arranged. When the entire bottom wall 1211 is located on one side of the dental midline C of the appliance assembly 300, the first side and the second side are the mesial side and the distal side of the bottom wall 1211, respectively. When the bottom wall 1211 passes through the dental midline C of the appliance assembly 300, the first side is the distal side located in the first hemimaxilla region C1, and the second side is the distal side located in the second hemimaxilla region C2.

[0232] The four edges L1, L2, L3, and L4 include a first edge L1 located on either the buccal side or the lingual side of the bottom wall 1211, a third edge L3 located on the other of the buccal side or the lingual side of the bottom wall 1211, a second edge L2 and a fourth edge L4 located on the first side and the second side of the bottom wall 1211, respectively. The first edge L1, the second edge L2, the third edge L3, and the fourth edge L4 are successively connected end to end to form the first periphery L.

[0233] The first side corresponds to the second edge L2, and the second side corresponds to the fourth edge L4. One of the first edge L1 and the third edge L3 is located on the first lingual surface B1 or near the first lingual surface B1.

[0234] Here, the length of the first edge L1 is greater than the length of the second edge L2, and the length of the first edge L1 is greater than the length of the fourth edge L4, that is, the bottom wall 1211 is generally a strip-shaped structure extending in the direction of the dental arch.

[0235] Next, several implementation forms of the groove 121 and the protrusion 221 will be introduced.

[0236] In the first implementation form, as shown in FIGS. 43 to 52, the surrounding wall 1212 connects to a partial area of the first periphery L. That is, in the circumferential direction of the first periphery L, the surrounding wall 1212 is a semi-closed structure.

[0237] The advantages of the semi-closed structure form of the surrounding wall 1212 are as follows: (1) The structure of the surrounding wall 1212 has a large deformation amount, which can assist the protrusion 221 to smoothly enter the groove 121, and can assist the first limiting structure 13 and the second limiting structure 23 to cooperate with each other during the process of the protrusion 221 entering the groove 121; (2) The semi-closed structure form of the surrounding wall 1212 is equivalent to forming an opening P at the groove 121, which is convenient for the groove 121 structure to be separated from the dental mold during the demolding process in the thermoplastic membrane forming process.

[0238] Optionally, the surrounding wall 1212 includes a first surrounding wall 12121. A junction area is formed between the first surrounding wall 12121 and the bottom wall 1211, and the junction area is in the shape of a "one" shape, an "L" shape, a "匚" shape, or a "冂" shape.

[0239] Optionally, the enclosure 1212 includes a first enclosure 12121, which is located on at least one of the first side, second side, buccal side, and lingual side of the base wall 1211.

[0240] Optionally, the first perimeter wall 12121 is a continuous structure extending along the circumferential direction of the first perimeter L. The first perimeter wall 12121 extends from the first side through the buccal side to the second side. Alternatively, the first perimeter wall 12121 extends from the lingual side through the buccal side to either the first or second side. Alternatively, the first perimeter wall 12121 extends from the lingual side through the buccal side to the lingual side. Alternatively, the first perimeter wall 12121 extends from the first side through the lingual side to the second side. Alternatively, the first perimeter wall 12121 extends from the buccal side through the lingual side to either the first or second side. Alternatively, the first perimeter wall 12121 extends from the buccal side through the lingual side to the buccal side.

[0241] Optionally, the enclosure 1212 also includes a second enclosure 12122, which is spaced apart from the first enclosure 12121. The cooperation between the first enclosure 12121 and the second enclosure 12122 can improve the ability to enclose the protrusion 221.

[0242] Optionally, the first perimeter L is formed by four sequentially connected edges L1, L2, L3, and L4. The enclosure 1212 includes a first enclosure 12121, which connects at least a portion of one edge. Alternatively, the first enclosure 12121 continuously connects at least a portion of two adjacent edges. Alternatively, the first enclosure 12121 continuously connects at least a portion of three edges. Alternatively, the first enclosure 12121 continuously connects portions of four edges.

[0243] "Continuous connection" means that the first enclosure 12121 is a continuous structure. The continuous structure of the first enclosure 12121 can reduce the difficulty of demolding on the one hand, and increase the strength of the first enclosure 12121 on the other hand, thereby enhancing the fit strength between the receiving cavity S formed by the enclosure 1212 and the protrusion 221.

[0244] Figures 43 to 52 show top views of several specific examples of enclosure 1212.

[0245] In a first specific example, referring to Figure 43, the enclosure 1212 includes a first enclosure 12121 that connects at least a portion of an edge. For example, the first enclosure 12121 connects a portion of the first edge L1. In this case, the boundary area formed between the first enclosure 12121 and the bottom wall 1211 is in the shape of an "I". The first enclosure 12121 may also connect to other edges.

[0246] The first enclosure wall 12121 and the first tongue surface B1 cooperate to form a groove 121.

[0247] In this example, the first enclosure 12121 does not extend to the second edge L2, the third edge L3, and the fourth edge L4. The third edge L3 corresponds to the first tongue surface B1, and the portion of the groove 121 corresponding to the second edge L2 and the fourth edge L4 is the opening P.

[0248] Referring to Figure 44, in the second specific example, the enclosure 1212 includes a first enclosure 12121, which continuously connects at least a portion of the areas of two adjacent edges. Here, we take the example of the first enclosure 12121 continuously connecting the entire area of ​​the first edge L1 and the entire area of ​​the second edge L2. In this case, the boundary area formed between the first enclosure 12121 and the bottom wall 1211 is "L"-shaped. The first enclosure 12121 may also connect to other adjacent edges.

[0249] The first enclosure wall 12121 and the first tongue surface B1 cooperate to form a groove 121.

[0250] In this example, the first enclosure 12121 does not extend to the third edge L3 and the fourth edge L4. The third edge L3 corresponds to the first tongue surface B1, and the portion of the groove 121 corresponding to the fourth edge L4 is the opening P.

[0251] Referring to Figure 45, in the third specific example, the enclosure 1212 includes a first enclosure 12121 and a second enclosure 12122 spaced apart. The first enclosure 12121 is located on the first side, and the second enclosure 12122 is located on the second side. That is, the first enclosure 12121 connects to the second edge L2, and the second enclosure 12122 connects to the fourth edge L4. The first enclosure 12121 and the second enclosure 12122 connect to the first tongue surface B1, and the first enclosure 12121, the second enclosure 12122, and the first tongue surface B1 enclose a groove 121.

[0252] In this example, neither the first enclosure 12121 nor the second enclosure 12122 extends to the first edge L1 and the third edge L3. The third edge L3 corresponds to the first tongue surface B1, and the portion of the groove 121 corresponding to the first edge L1 is the opening P.

[0253] Referring to Figure 46, in the fourth specific example, the enclosure 1212 includes a first enclosure 12121, a second enclosure 12122, and a third enclosure 12123. The main difference between the fourth specific example and the third specific example is that the fourth specific example also includes the third enclosure 12123 located at the first edge L1.

[0254] Combined with FIG. 47, in the fifth specific example, the surrounding wall 1212 includes a first surrounding wall 12121, and the first surrounding wall 12121 continuously connects at least partial regions of three edges. Here, take the example that the first surrounding wall 12121 continuously connects all regions of the first edge L1, partial regions of the second edge L2, and partial regions of the fourth edge L4. At this time, the junction area formed between the first surrounding wall 12121 and the bottom wall 1211 is in an "L" shape. The first surrounding wall 12121 can also connect other three adjacent edges.

[0255] In this example, the first surrounding wall 12121 does not extend to the third edge L3. The third edge L3 connects the first tongue surface B1, and the first surrounding wall 12121 can be spaced apart from the first tongue surface B1.

[0256] In the fifth specific example, the first surrounding wall 12121 is a continuous structure extending along the circumferential direction of the first peripheral edge L1. The first surrounding wall 12121 extends from the first side through the lingual side to the second side. In other specific examples, the first surrounding wall 12121 can also be in other extension forms.

[0257] Combined with FIG. 48, in the sixth specific example, the surrounding wall 1212 includes a first surrounding wall 12121, and the first surrounding wall 12121 continuously connects at least partial regions of three edges. Here, take the example that the first surrounding wall 12121 continuously connects all regions of the second edge L2, all regions of the third edge L3, and all regions of the fourth edge L4. At this time, the junction area formed between the first surrounding wall 12121 and the bottom wall 1211 is in an "L" shape. The first surrounding wall 12121 can also connect other three adjacent edges.

[0258] In this example, the first surrounding wall 12121 extends to the first tongue surface B1, and the first surrounding wall 12121 does not extend to the first edge L1. The part of the groove 121 corresponding to the first edge L1 is an opening P.

[0259] In the sixth specific example, the first surrounding wall 12121 is a continuous structure extending along the circumferential direction of the first peripheral edge L1. The first surrounding wall 12121 extends from the first side through the buccal side to the second side. In other specific examples, the first surrounding wall 12121 can also be in other extension forms.

[0260] Combined with FIG. 49, in the seventh specific example, the surrounding wall 1212 includes a first surrounding wall 12121 and a second surrounding wall 12122. The main difference between the seventh specific example and the sixth specific example is that: the seventh specific example further includes a second surrounding wall 12122 located at the first edge L1, and the second surrounding wall 12122 is spaced apart from the first surrounding wall 12121.

[0261] Optionally, the second surrounding wall 12122 can be located in the middle of the first edge L1.

[0262] Combined with FIGS. 50 and 51, in the eighth specific example, the surrounding wall 1212 includes a first surrounding wall 12121, and the first surrounding wall 12121 continuously connects partial regions of four edges. Here, take the first surrounding wall 12121 continuously connecting the partial region of the first edge L1, the entire region of the second edge L2, the entire region of the third edge L3, and the entire region of the fourth edge L4 as an example. At this time, the junction area formed between the first surrounding wall 12121 and the bottom wall 1211 is of a "冂" shape.

[0263] In this example, the first surrounding wall 12121 does not completely connect the first peripheral edge L1, and the partial region of the groove 121 corresponding to the first edge L1 is an opening P.

[0264] In the eighth specific example, the first surrounding wall 12121 is a continuous structure extending along the circumferential direction of the first peripheral edge L1, and the first surrounding wall 12121 extends from the lingual side to the buccal side and then to the second side. In other specific examples, the first surrounding wall 12121 may also be in other extended forms.

[0265] In the eighth specific example, the first surrounding wall 12121 connecting the four edges can greatly improve the strength of the formed groove 121, and further enhance the fitting strength between the groove 121 formed by the surrounding wall 1212 and the protrusion 221. Moreover, the groove 121 forms an opening P at one edge, and the opening P can ensure the deformable amount of the groove 121.

[0266] Optionally, the first surrounding wall 12121 includes a starting end 12121' and a terminating end 12121", and the starting end 12121' and the terminating end 12121" are two ends of the first surrounding wall 12121 in the circumferential direction of the first peripheral edge L.

[0267] The starting end 12121' is located at the first edge L1, and the terminating end 12121" is located at the first edge L1 or the fourth edge L4.

[0268] When the starting end 12121' is located at the first edge L1, the first surrounding wall 12121 forms a corner structure at the connection of the first edge L1 and the second edge L2, and the corner structure can partially wrap the protrusion 221 accommodated in the groove 121.

[0269] Combined with FIG. 50, when the terminating end 12121" is located at the fourth edge L4, the first surrounding wall 1212 does not continue to extend through the fourth edge L4 to the first edge L1, that is, a corner structure is not formed at the connection of the fourth edge L4 and the first edge L1.

[0270] Combined with FIG. 51, when the terminating end 12121" is located at the first edge L1, the surrounding wall 1212 also forms a corner structure at the connection of the fourth edge L4 and the first edge L1, so as to further wrap the protrusion 221.

[0271] Optionally, the first edge L1 of the present specific example is the edge located on the lingual side of the bottom wall 1211, but not limited thereto. For example, the first edge L1 may also be the edge located on the buccal side of the bottom wall 1211.

[0272] Combined with FIG. 52, in the ninth specific example, the surrounding wall 1212 includes a first surrounding wall 12121 and a second surrounding wall 12122. The main difference between the ninth specific example and the eighth specific example is that: the ninth specific example further includes a second surrounding wall 12122 located at the first edge L1, and the second surrounding wall 12122 is arranged at an interval from the first surrounding wall 12121.

[0273] Optionally, the second surrounding wall 12122 may be located in the middle of the first edge L1.

[0274] In the second implementation form, combined with FIGS. 53 to 55, the surrounding wall 1212 connects all regions of the first peripheral edge L. That is, in the circumferential direction of the first peripheral edge L, the surrounding wall 1212 is a fully enclosed structure, and the groove 121 is a peripheral fully enclosed groove.

[0275] The advantage of the fully enclosed structure type of surrounding wall 1212 is that: the surrounding wall 1212 can achieve an all-round wrapping of the protrusion 221 to improve the stability of the cooperation between the groove 121 and the protrusion 221.

[0276] Optionally, a junction area is formed between the surrounding wall 1212 and the bottom wall 1211, and the junction area is in a "mouth" shape.

[0277] Optionally, in the circumferential direction of the first peripheral edge L, the surrounding wall 1212 includes a first area 1213 and a second area 1214, and both the first area 1213 and the second area 1214 are areas directly connected to the first peripheral edge L.

[0278] The deformability of the first area 1213 is less than that of the second area 1214. The second area 1214 has a larger deformability, which can assist the protrusion 221 to smoothly enter the groove 121, and can assist the first limiting structure 13 and the second limiting structure 23 to cooperate with each other during the process of the protrusion 221 entering the groove 121.

[0279] Optionally, the deformability of different areas of the surrounding wall 1212 can be controlled by controlling the material thickness and hardness of the surrounding wall 1212. Or, different structures can be formed in different areas of the surrounding wall 1212 to control the deformability of different areas of the surrounding wall 1212, but not limited thereto.

[0280] Combined with FIGS. 54 and 55, they are schematic diagrams of several specific examples of the surrounding wall 1212.

[0281] Referring to Figure 54, in the first specific example, in the vertical direction Z, the first region 1213 of the enclosure 1212 has a first average height, and the second region 1214 has a second average height. The first average height is greater than the second average height, that is, the height of the second region 1214 is lower than that of the first region 1213.

[0282] Neither the first region 1213 nor the second region 1214 has a part with zero height. The enclosure 1212 still connects to the entire area of ​​the first perimeter L, and the groove 121 is still a fully enclosed groove around the perimeter.

[0283] Optionally, taking the first region 1213 and the second region 1214 as an example to form a wall 1212. The first region 1213 extends from the first side through the cheek to the second side. Alternatively, the first region 1213 extends from the tongue side through the cheek to the first or second side. Alternatively, the first region 1213 extends from the tongue side through the cheek to the tongue side. Alternatively, the first region 1213 extends from the first side through the tongue side to the second side. Alternatively, the first region 1213 extends from the cheek side through the tongue side to the first or second side, or the first region 1213 extends from the cheek side through the tongue side to the cheek side.

[0284] In the first specific example, the first region 1213 continuously connects the second edge L2, the third edge L3, and the second edge L4 of the first periphery L, extending from the lingual side through the buccal side to the distal side. The second region 1214 connects to the first edge L1. As can be seen, the height of the second region 1214 in Figure 54 is relatively small.

[0285] In other specific examples, the second region 1214 may also be connected to the third edge L3, and the first region 1213 and the second region 1214 may also be regions that are spaced apart from each other, that is, the enclosure 1212 also includes other regions.

[0286] Optionally, in this specific example, the first edge L1 is the edge located on the lingual side of the base wall 1211. However, this is not a limitation; for example, the first edge L1 could also be the edge located on the buccal side of the base wall 1211.

[0287] In this specific example, since the enclosure 1212 is not a standard structure, the enclosure 1212 itself has ups and downs in the vertical Z direction. "The first average height is greater than the second average height" means that the overall height of the first area 1213 is higher and the overall height of the second area 1214 is lower. The second area 1214 can be regarded as the area formed by hollowing out part of the first area 1213.

[0288] The smaller height of the second region 1214 is equivalent to forming a slot P1 on the side of the enclosure 1212 away from the first occlusal surface T11 of the first occlusal surface, which can increase the deformability of the second region 1214.

[0289] Referring to Figure 54, in the second specific example, the second region 1214 includes a second region body 1215 and at least one slot P1 extending through the second region body 1215 in the thickness direction of the surrounding wall 1212. The second region body 1215 includes a top surface 1216 of a first occlusal surface T11 away from the first occlusal surface T11, and the slot P1 extends through the top surface 1216.

[0290] The slot P1 does not penetrate the end face of the second area body 1215 that connects to the first periphery L, that is, the enclosure 1212 still connects to the entire area of ​​the first periphery L, and the groove 121 is still a fully enclosed groove on the periphery.

[0291] Optionally, taking the enclosure 1212 formed by the first region 1213 and the second region 1214 as an example, the first region 1213 of the enclosure 1212 is continuously connected to the second edge L2, the third edge L3, and the second edge L4 of the first perimeter L, and the second region 1214 is connected to the first edge L1. As can be seen in Figure 54, a slot P1 is formed above the second region 1214, which can increase the deformability of the second region 1214.

[0292] Referring to Figure 55, in the third specific example, the second region 1214 includes a second region body 1215 and at least one slot P1 extending through the second region body 1215 in the thickness direction of the surrounding wall 1212. The second region body 1215 includes a top surface 1216 of a first occlusal surface T11 away from the first occlusal surface T11, and the slot P1 extends through the top surface 1216.

[0293] The difference between the third specific example and the second specific example is that the second region 1214 of the second specific example includes only one slot P1, while the second region 1214 of the third specific example includes multiple slots P1 distributed at intervals. The design of multiple slots P1 can take into account both the deformability of the second region 1214 and the ability of the second region 1214 to wrap the protrusion 221.

[0294] In the second implementation, the slot P1, compared to the opening P in the first implementation, can be seen as a structure formed by hollowing out a portion of the vertical Z-direction enclosure wall 1212, while the opening P can be seen as a structure formed by hollowing out the entire vertical Z-direction enclosure wall 1212. The height of the enclosure wall 1212 corresponding to the slot P1 is higher than the height of the enclosure wall 1212 corresponding to the opening P. In the hot-press molding process, the slot P1 scheme can reduce the difficulty of hot-press molding, making the formed groove 121 structure fit the additive more closely.

[0295] Optionally, the inner contour of the groove 121 matches the outer contour of the protrusion 221, which can improve the stability of the fit between the groove 121 and the protrusion 221.

[0296] Optionally, referring to Figure 56, the first limiting structure 13 is connected to the inner side 1218 of the enclosure 1212, and the second limiting structure 23 is connected to the outer side 2212 of the protrusion 221. One of the first limiting structure 13 and the second limiting structure 23 is a notch, and the other is a convex ridge.

[0297] Optionally, the first limiting structure 13 may also be located at the first tongue surface B1.

[0298] Optionally, the explanation can be based on the example of the first limiting structure 13 being a notch 13 and the second limiting structure 23 being a convex ridge 23.

[0299] Referring to Figure 56, the first limiting structure 13 is a notch, which is formed by the cooperation of the first protrusion 131 protruding towards the inner side 1218 of the surrounding wall 1212 and the bottom wall 1211. That is, the area between the first protrusion 131 and the bottom wall 1211 is the notch 13, and the size of the notch 13 can be adapted to the size of the protrusion 23.

[0300] Optionally, the first protrusion 131 may be located at the higher part of the enclosure wall 1212, while the other parts of the enclosure wall 1212 are relatively low, which facilitates the protrusion 221 entering the groove 121.

[0301] Optionally, the second limiting structure 23 is a ridge 23, and the protrusion 221 includes a top 2211 that is away from the second tongue surface B2 and connected to the outer side surface 2212 of the protrusion 221. The ridge 23 connected to the top 2211 can effectively reduce the depth of the receiving cavity S of the groove 121 in the vertical direction Z.

[0302] The protrusion 221 is formed by the outer side 2212 and the top 221.

[0303] Optionally, at least one of the notch 13 or the ridge 23 has a guide surface for assisting the ridge 23 to slide into the notch 13. The guide surface is a bevel or an arc surface.

[0304] For example, referring to Figures 57 and 58, a guide surface 1312 can be formed at the end face 1311 of the first protrusion 131 away from the bottom wall 1211. The guide surface 1312 can be the inclined surface shown in Figure 57 or the arc surface shown in Figure 58, but is not limited thereto.

[0305] Optionally, the first limiting structure 13 (i.e., the notch 13) is a continuous structure connecting the entire enclosure 1212 along the circumferential direction of the first perimeter L. That is, a continuous notch 13 is provided throughout the entire enclosure 1212, and the first protrusion 131 forming the notch 13 is provided around the entire first end face 1217 of the enclosure 1212, and the notch 13 provides sufficient locking range for the protrusion 23.

[0306] Alternatively, referring to Figure 59, the first retaining part 11 includes two first limiting structures 13 (i.e., two notches 13) spaced apart, with the two notches 13 facing each other. The two notches 13 facing each other can cooperate with each other to prevent the protruding ridge 23 from disengaging from the notch 13.

[0307] Referring to Figure 59, the first wall 12121 connects the first side, the second side, and the buccal side of the bottom wall 1211. The second wall 12122 connects the lingual side of the bottom wall 1211. The first wall 12121 includes two first portions 12121a corresponding to the first and second sides, and a second portion 12121b corresponding to the buccal side. The height of the first portion 12121a is greater than the height of the second portion 12121b, and two notches 13 are located at the two first portions 12121a.

[0308] The height of the second enclosure 12122 is less than the height of the first part 12121a. The different heights of the entire enclosure 1212 facilitate the entry of the protrusion 221 into the groove 121 while ensuring the enclosure 1212's ability to enclose the protrusion 221.

[0309] Further descriptions of the orthodontic appliance assembly 300 in the second embodiment can be found in the description of the orthodontic appliance assembly 300 in the first embodiment, and will not be repeated here.

[0310] The posterior tooth region of the orthodontic appliance assembly 300 in the second embodiment may also include the first retention portion 11 and the second retention portion 21 as described in the first embodiment.

[0311] In summary, the second embodiment of this application connects the first orthodontic appliance 100 and the second orthodontic appliance 200 through the first retention part 11 and the second retention part 21 in the anterior tooth region. The first retention part body 12 and the first limiting structure 13 are located in the same first retention part 11, and the second retention part body 22 and the second limiting structure 23 are located in the same second retention part 21. Through the mutual cooperation of the first retention part 11 and the second retention part 21, the mutual cooperation of the first retention part body 12 and the second retention part body 22 and the mutual cooperation of the first limiting structure 13 and the second limiting structure 23 can be realized simultaneously. That is, the relative movement of the first orthodontic appliance 100 and the second orthodontic appliance 200 in the horizontal plane X and the vertical direction Z can be realized simultaneously. This embodiment achieves multi-dimensional limiting through a simple structure, which greatly improves the connection stability between the first orthodontic appliance 100 and the second orthodontic appliance 200, thereby improving the corresponding orthodontic effect, and is convenient for patients to wear themselves.

[0312] In addition, the first retention part 11 and the second retention part 21 of this specific embodiment are located on the first tongue surface B1 and the second tongue surface B2, respectively. When the patient wears the orthodontic component 300, the first retention part 11 and the second retention part 21 will not interfere with each other with the lip and cheek muscles, which can greatly improve the patient experience.

[0313] Referring to Figures 60 to 63, the second embodiment of this application provides an orthodontic appliance assembly 300.

[0314] The orthodontic appliance assembly 300 includes a first appliance body 10 that accommodates a first jaw T1, a second appliance body 20 that accommodates a second jaw T2, and a plurality of retention assemblies 40 that connect the first appliance body 10 and the second appliance body 20.

[0315] Both the first orthodontic appliance body 10 and the second orthodontic appliance body 20 are shell-shaped structures made of polymer materials. One of the first jaw T1 and the second jaw T2 is the maxilla, and the other is the mandible.

[0316] The first orthodontic appliance body 10 has a first cavity S1 that matches the first jaw T1, and the second orthodontic appliance body 20 has a second cavity S2 that matches the second jaw T2. When the patient wears the orthodontic appliance assembly 300, the first orthodontic appliance body 10 is worn on the first jaw T1 through the first cavity S1, and the second orthodontic appliance body 20 is worn on the second jaw T2 through the second cavity S2.

[0317] When the first orthodontic appliance body 10 and the second orthodontic appliance body 20 are in an occlusal state, multiple retention assemblies 40 connect the first orthodontic appliance body 10 and the second orthodontic appliance body 20, keeping them in a preset relative position. This enables tooth straightening and retention, such as jaw position adjustment.

[0318] Optionally, multiple retaining groups 40 located in different areas cooperate with each other to achieve full movement limit and full rotation limit, while retaining group 40 in a certain area achieves partial movement limit and / or partial rotation limit.

[0319] Referring to Figure 63, the different regions include the first posterior tooth region C11, the second posterior tooth region C21, and the anterior tooth region C3. Alternatively, the different regions include the first posterior tooth region C11, the second posterior tooth region C21, the first anterior tooth region C31, and the second anterior tooth region C32. The first anterior tooth region C31 and the second anterior tooth region C32 together constitute the anterior tooth region C3.

[0320] The orthodontic appliance assembly 300 includes a first semi-maxillary region C1 and a second semi-maxillary region C2 located on either side of the dental midline C. The first posterior region C11 and the first anterior region C31 are located in the first semi-maxillary region C1, and the second posterior region C21 and the second anterior region C32 are located in the second semi-maxillary region C2.

[0321] For example, multiple retention groups 40 are simultaneously located in the first posterior region C11 and the first anterior region C31. Or, multiple retention groups 40 are simultaneously located in the first posterior region C11 and the second posterior region C21. Or, multiple retention groups 40 are simultaneously located in the first posterior region C11, the second posterior region C21, the first anterior region C31, and the second anterior region C32, etc.

[0322] The movement limit includes the movement limit of the first orthodontic appliance body 10 and the second orthodontic appliance body 20 on the first plane.

[0323] The first plane could be, for example, a horizontal plane X, which is roughly the plane that divides the jaw into upper and lower parts.

[0324] The first plane can also be a plane with a small angle to the horizontal plane X. The "movement limit" mainly achieves the limitation of the relative movement of the first orthodontic appliance body 10 and the second orthodontic appliance body 20 in the approximately horizontal direction.

[0325] The movement limit includes a first movement limit and a second movement limit. The first movement limit is the movement limit of the first orthodontic appliance body 10 and the second orthodontic appliance body 20 in the first direction Y1, and the second movement limit is the movement limit of the first orthodontic appliance body 10 and the second orthodontic appliance body 20 in the second direction X1. Both the first direction Y1 and the second direction X1 are located in the first plane, and the included angle between the first direction Y1 and the second direction X1 is an acute angle or a right angle.

[0326] For ease of explanation, let's take the first direction Y1 as the sagittal direction and the second direction X1 as the horizontal direction as an example. The angle between the first direction Y1 and the second direction X1 is a right angle.

[0327] The movement limit includes the movement limit in the positive direction of the first direction Y1 (i.e., from bottom to top), the movement limit in the negative direction of the first direction Y1 (i.e., from top to bottom), the movement limit in the positive direction of the second direction X1 (i.e., from left to right), and the movement limit in the negative direction of the second direction X1 (i.e., from right to left).

[0328] In other embodiments, the first direction Y1 and the second direction X1 can be any two different directions. By simultaneously limiting the first orthodontic appliance body 10 and the second orthodontic appliance body 20 in the first direction Y1 and the second direction X1, the movement limitation of the first orthodontic appliance body 10 and the second orthodontic appliance body 20 in the entire first plane can be achieved.

[0329] The rotation limit includes the rotation limit of the first orthodontic appliance body 10 and the second orthodontic appliance body 20 in the dental arch direction. The rotation limit includes the rotation limit of the second orthodontic appliance body 20 relative to the first orthodontic appliance body 10 in the dental arch direction in a clockwise direction Z1 and in a counterclockwise direction Z2.

[0330] "Multiple retaining groups 40 located in different regions cooperate to achieve full movement limit and full rotation limit, and retaining group 40 in a certain region achieves partial movement limit and / or partial rotation limit" means that only when two retaining groups 40 in at least two different regions cooperate can the first movement limit (including movement limit in the positive direction and movement limit in the negative direction of the first direction Y1), the second movement limit (including movement limit in the positive direction and movement limit in the negative direction of the second direction X1), and the rotation limit (including rotation limit in the clockwise direction Z1 and rotation limit in the counterclockwise direction Z2) be achieved.

[0331] For example, consider multiple retention groups 40, including two retention groups 40 located in the first anterior tooth region C31 and the first posterior tooth region C11. The retention group 40 located in the first anterior tooth region C31 can only achieve partial limitation of the first movement limitation, the second movement limitation, and the rotation limitation. For example, it can only achieve the first movement limitation, or only the positive movement limitation of the first movement limitation and the negative movement limitation of the second movement limitation. The retention group 40 located in the first posterior tooth region C11 can also only achieve partial limitation of the first movement limitation, the second movement limitation, and the rotation limitation.

[0332] When the two retention groups 40 of the first anterior tooth region C31 and the first posterior tooth region C11 cooperate with each other, they can realize all the functions of the first movement limit, the second movement limit, and the rotation limit. That is, they can realize the omnidirectional limitation of the first appliance body 10 and the second appliance body 20 throughout the first plane.

[0333] This embodiment achieves complete movement and rotation limits between the first orthodontic appliance body 10 and the second orthodontic appliance body 20 through the cooperation of multiple retention groups 40 in different regions. This simplifies the structure of the retention group 40 in each region and facilitates molding. Furthermore, the multiple retention groups 40 in different regions improve the stability of the entire orthodontic appliance assembly 300.

[0334] Optionally, at least two of the multiple retention groups 40 are interconnected, or at least two of the multiple retention groups 40 are spaced apart from each other.

[0335] "At least two retention groups 40 are interconnected" means that at least a portion of the regions of at least two retention groups 40 are connected together. "At least two retention groups 40 are spaced apart" means that all regions between at least two retention groups 40 are completely disconnected.

[0336] For example, multiple retention groups 40 include two retention groups 40, which are located in the first posterior region C11 and the first anterior region C31, respectively, and the two retention groups 40 are connected to each other or spaced apart from each other.

[0337] When the two retention groups 40 are connected to each other, the two retention groups 40 extend from the first posterior tooth region C11 to the first anterior tooth region C31, and the two retention groups 40 form a continuous structure. However, the retention group 40 in the first posterior tooth region C11 can only achieve partial restraint, and the retention group 40 in the first anterior tooth region C31 can also only achieve partial restraint.

[0338] Alternatively, the two retention groups 40 are located in the first anterior region C31 and the second anterior region C32, respectively, and the two retention groups 40 are connected to each other or spaced apart from each other.

[0339] When the two retention groups 40 are connected to each other, the two retention groups 40 extend from the first anterior region C31 to the second anterior region C32, and the two retention groups 40 form a continuous structure. However, the retention group 40 in the first anterior region C31 can only achieve partial restraint, and the retention group 40 in the second anterior region C32 can also only achieve partial restraint.

[0340] Optionally, multiple retention groups 40 connect to the occlusal or lingual surfaces of the orthodontic appliance assembly 300. Specifically, the retention groups 40 connect the first occlusal surface A1 of the first orthodontic appliance body 10 and the second occlusal surface A2 of the second orthodontic appliance body 20. Alternatively, the retention groups 40 connect the first lingual surface B1 of the first orthodontic appliance body 10 and the second lingual surface B2 of the second orthodontic appliance body 20, which can reduce interference with the labial and buccal muscles.

[0341] Optionally, each retention group 40 includes a protrusion 41 and a surrounding wall 42 that mutually limit each other on a first plane, one of the protrusion 41 and the surrounding wall 42 being connected to the first orthodontic body 10, and the other being connected to the second orthodontic body 20.

[0342] Optionally, the protrusion 41 is located on one side of the enclosure 42, restricting the movement of the enclosure 42 toward the protrusion 41 in the first plane, and the enclosure 42 is located on one side of the protrusion 41, restricting the movement of the protrusion 41 toward the enclosure 42 in the first plane. When the enclosure 42 and the protrusion 41 cooperate with each other, the movement of the enclosure 42 and the protrusion 41 in at least a portion of the first plane can be restricted.

[0343] Since the protrusion 41 and the enclosure 42 connect the first orthodontic appliance body 10 and the second orthodontic appliance body 20, when the protrusion 41 and the enclosure 42 cooperate with each other, they can restrict the movement of the first orthodontic appliance body 10 and the second orthodontic appliance body 20 in at least some directions within the first plane.

[0344] When the retention assembly 40 is located in the first posterior tooth region C11 or the second posterior tooth region C21, the protrusion 41 connects to the first occlusal surface A1 of the first orthodontic appliance body 10, and the enclosure 42 connects to the second occlusal surface A2 of the second orthodontic appliance body 20. Alternatively, the protrusion 41 connects to the second occlusal surface A2 of the second orthodontic appliance body 20, and the enclosure 42 connects to the first occlusal surface A1 of the first orthodontic appliance body 10.

[0345] When the retention assembly 40 is located in the first anterior tooth region C31 and the second anterior tooth region C32, the protrusion 41 connects to the first lingual surface B1 of the first orthodontic appliance body 10, and the surrounding wall 42 connects to the second lingual surface B2 of the second orthodontic appliance body 20. Alternatively, the protrusion 41 connects to the second lingual surface B2 of the second orthodontic appliance body 20, and the surrounding wall 42 connects to the first lingual surface B1 of the first orthodontic appliance body 10.

[0346] Optionally, the multiple enclosures 42 of the multiple retention groups 40 include a first enclosure group, a second enclosure group, and a third enclosure group, wherein the multiple enclosures in the first enclosure group, the second enclosure group, and the third enclosure group are located in different areas.

[0347] The multiple walls 42 in the first enclosure group cooperate to restrict the relative movement of the first orthodontic appliance body 10 and the second orthodontic appliance body 20 in the first direction Y1. The multiple walls 42 in the second enclosure group cooperate to restrict the relative movement of the first orthodontic appliance body 10 and the second orthodontic appliance body 20 in the second direction X1. The multiple walls 42 in the third enclosure group cooperate to restrict the relative rotation of the first orthodontic appliance body 10 and the second orthodontic appliance body 20 in the dental arch direction.

[0348] Optionally, the first enclosure group includes a first enclosure 42a and a third enclosure 42c spaced apart, the first enclosure 42a and the third enclosure 42c cooperating with each other to restrict the relative movement of the first orthodontic appliance body 10 and the second orthodontic appliance body 20 in the first direction Y1.

[0349] The second enclosure group includes a second enclosure 42b and a fourth enclosure 42d spaced apart, which cooperate with each other to restrict the relative movement of the first orthodontic appliance body 10 and the second orthodontic appliance body 20 in the second direction X1.

[0350] The third enclosure group includes a fifth enclosure 42e and a sixth enclosure 42f spaced apart. The fifth enclosure 42e and the sixth enclosure 42f cooperate with each other to restrict the relative rotation of the first orthodontic appliance body 10 and the second orthodontic appliance body 20 in the direction of the dental arch.

[0351] The first enclosure 42a, the second enclosure 42b, the third enclosure 42c, the fourth enclosure 42d, the fifth enclosure 42e, and the sixth enclosure 42f are located in different areas, thus ensuring that multiple retaining groups 40 are located in different areas.

[0352] Optionally, the first enclosure 42a and the third enclosure 42c mainly realize the mutual limiting of the first orthodontic appliance body 10 and the second orthodontic appliance body 20 in the first direction Y1. Taking the first direction Y1 as the sagittal direction as an example, the first direction Y1 includes limiting the movement of the second orthodontic appliance body 20 relative to the first orthodontic appliance body 10 from bottom to top and limiting the movement of the second orthodontic appliance body 20 relative to the first orthodontic appliance body 10 from top to bottom.

[0353] Optionally, the second enclosure 42b and the fourth enclosure 42d mainly realize the mutual limiting of the first orthodontic appliance body 10 and the second orthodontic appliance body 20 in the second direction X1. Taking the second direction X1 as the horizontal direction as an example, the second direction X1 includes limiting the movement of the second orthodontic appliance body 20 relative to the first orthodontic appliance body 10 from left to right and limiting the movement of the second orthodontic appliance body 20 relative to the first orthodontic appliance body 10 from right to left.

[0354] The fifth enclosure 42e and the sixth enclosure 42f mainly restrict the relative rotation of the first orthodontic appliance body 10 and the second orthodontic appliance body 20 in the dental arch direction, including restricting the rotation of the second orthodontic appliance body 20 relative to the first orthodontic appliance body 10 in the clockwise direction Z1 of the dental arch and restricting the rotation of the second orthodontic appliance body 20 relative to the first orthodontic appliance body 10 in the counterclockwise direction Z2 of the dental arch.

[0355] Optionally, the first enclosure 42a, the second enclosure 42b, the third enclosure 42c, and the fourth enclosure 42d are four different enclosures, the fifth enclosure 42e coincides with one of the first enclosure 42a, the second enclosure 42b, the third enclosure 42c, and the fourth enclosure 42d, and / or the sixth enclosure 42f coincides with another of the first enclosure 42a, the second enclosure 42b, the third enclosure 42c, and the fourth enclosure 42f.

[0356] The fifth enclosure 42e and the sixth enclosure 42f can also be other enclosures independent of the first enclosure 42a, the second enclosure 42b, the third enclosure 42c and the fourth enclosure 42f.

[0357] Multiple retention assemblies 40 restrict the relative movement of the first orthodontic appliance body 10 and the second orthodontic appliance body 20 in the first plane via a first enclosure 42a, a second enclosure 42b, a third enclosure 42c, a fourth enclosure 42d, and corresponding protrusions 41. When the fifth enclosure 42e and the sixth enclosure 42f coincide with the first enclosure 42a, the second enclosure 42b, the third enclosure 42c, and the fourth enclosure 42d, at least a portion of the first enclosure 42a, the second enclosure 42b, the third enclosure 42c, and the fourth enclosure 42d can simultaneously restrict the relative rotation of the first orthodontic appliance body 10 and the second orthodontic appliance body 20 in the dental arch direction. When they do not coincide at all or partially coincide, a fifth enclosure 42e and / or a sixth enclosure 42f are required to restrict the relative rotation of the first orthodontic appliance body 10 and the second orthodontic appliance body 20 in the dental arch direction.

[0358] The plurality of retention groups 40 include at least one first retention group 40a, at least one second retention group 40b, at least one third retention group 40c and at least one fourth retention group 40d.

[0359] The plurality of protrusions 41 include a first protrusion 41a located in the first retention group 40a, a second protrusion 41b located in the second retention group 40b, a third protrusion 41c located in the third retention group 40c, and a fourth protrusion 41d located in the fourth retention group 40d.

[0360] The plurality of enclosures 42 include a first enclosure 42a located in a first retention group 40a, a second enclosure 42b located in a second retention group 40b, a third enclosure 42c located in a third retention group 40c, and a fourth enclosure 42d located in a fourth retention group 40d.

[0361] That is, the first retention group 40a includes the first protrusion 41a and the first enclosure 42a, the second retention group 40b includes the second protrusion 41b and the second enclosure 42b, the third retention group 40c includes the third protrusion 41c and the third enclosure 42c, and the fourth retention group 40d includes the fourth protrusion 41d and the fourth enclosure 42d.

[0362] The first enclosure 42a is located on the first side E1 of the first protrusion 41a, the second enclosure 42b is located on the second side E2 of the second protrusion 41b, the third enclosure 42c is located on the third side E3 of the third protrusion 41c, and the fourth enclosure 42d is located on the fourth side E4 of the fourth protrusion 41d.

[0363] Optionally, the first direction Y1 is the direction between the first side E1 and the third side E3, and the first side E1 and the third side E3 are the upper and lower sides of the first direction Y1.

[0364] The first side E1 and the third side E3 are the lower side and the upper side, respectively. The extension directions of the first enclosure wall 42a and the third enclosure wall 42c are approximately perpendicular to the first direction Y1, that is, the first enclosure wall 42a and the third enclosure wall 42c extend approximately horizontally, and the extension directions of the first enclosure wall 42a and the third enclosure wall 42c are approximately parallel to each other.

[0365] "Approximately horizontal extension" means that the first enclosure wall 42a and the third enclosure wall 42c can have a small angle with the second direction X1, and the first enclosure wall 42a and the third enclosure wall 42c can be regarded as horizontal extension.

[0366] The first enclosure 42a cooperates with the first protrusion 41a to restrict the relative movement of the first orthodontic appliance body 10 and the second orthodontic appliance body 20 in the direction from the third side E3 toward the first side E1. The third enclosure 42c cooperates with the third protrusion 41c to restrict the relative movement of the first orthodontic appliance body 10 and the second orthodontic appliance body 20 in the direction from the first side E1 toward the third side E3. Therefore, when the orthodontic appliance assembly 300 has both the first enclosure 42a and the third enclosure 42c, the relative movement of the first orthodontic appliance body 10 and the second orthodontic appliance body 20 between the first side E1 and the third side E3 can be restricted, that is, the relative movement of the first orthodontic appliance body 10 and the second orthodontic appliance body 20 in the first direction Y1 can be restricted.

[0367] Optionally, the second direction X1 is the direction between the second side E2 and the fourth side E4, and the second side E2 and the fourth side E4 are the left and right sides of the second direction X1.

[0368] The second side E2 and the fourth side E4 are the left and right sides, respectively. The extension directions of the second enclosure wall 42b and the fourth enclosure wall 42d are approximately perpendicular to the second direction X1. That is, the second enclosure wall 42b and the fourth enclosure wall 42d extend approximately vertically, and their extension directions are approximately parallel to each other.

[0369] "Approximately vertical extension" means that the second enclosure wall 42b and the fourth enclosure wall 42d can have a small angle with the first direction Y1, and the second enclosure wall 42b and the fourth enclosure wall 42d can be regarded as vertical extension.

[0370] The second enclosure 42b cooperates with the second protrusion 41b to restrict the relative movement of the first orthodontic appliance body 10 and the second orthodontic appliance body 20 in the direction from the fourth side E4 toward the second side E2. The fourth enclosure 42d cooperates with the fourth protrusion 41d to restrict the relative movement of the first orthodontic appliance body 10 and the second orthodontic appliance body 20 in the direction from the second side E2 toward the fourth side E4. Therefore, when the orthodontic appliance assembly 300 has both the second enclosure 42b and the fourth enclosure 42d, the relative movement of the first orthodontic appliance body 10 and the second orthodontic appliance body 20 between the second side E2 and the fourth side E4 can be restricted, that is, the relative movement of the first orthodontic appliance body 10 and the second orthodontic appliance body 20 in the second direction X1 can be restricted.

[0371] Optionally, the plurality of retention groups 40 includes at least one fifth retention group 40e and at least one sixth retention group 40f. The plurality of protrusions 41 include a fifth protrusion 41e located in the fifth retention group 40e and a sixth protrusion 41f located in the sixth retention group 40f. The plurality of surrounding walls 42 include a fifth surrounding wall 42e located in the fifth retention group 40e and a sixth surrounding wall 42f located in the sixth retention group 40f. The fifth surrounding wall 42e restricts the rotation of the fifth protrusion 41e in a clockwise direction Z1 along the dental arch, and the sixth surrounding wall 42f restricts the rotation of the sixth protrusion 41f in a counterclockwise direction Z2 along the dental arch.

[0372] Optionally, the protrusion 41 is integrally formed with the first orthodontic appliance body 10, and the enclosure 42 is integrally formed with the second orthodontic appliance body 20. Alternatively, the protrusion 41 is integrally formed with the second orthodontic appliance body 20, and the enclosure 42 is integrally formed with the first orthodontic appliance body 10.

[0373] Taking the protrusion 41 as an integral part of the second orthodontic appliance body 20 and the enclosure 42 as an integral part of the first orthodontic appliance body 10 as an example, the protrusion 41 forms a second chamber S2' that connects to the second cavity S2, and the enclosure 42 forms a first chamber S1' that connects to the first cavity S1. Both the protrusion 41 and the enclosure 42 are hollow structures.

[0374] Optionally, fillers can be formed in the first chamber S1' and the second chamber S2' to increase the strength of the protrusion 41 and the surrounding wall 42.

[0375] Optionally, the first enclosure 42a, the second enclosure 42b, the third enclosure 42c, the fourth enclosure 42d, the fifth enclosure 42e, and the sixth enclosure 42f all have a "I" shaped cross section parallel to the horizontal plane X.

[0376] Taking an example where the first enclosure 42a, second enclosure 42b, third enclosure 42c, fourth enclosure 42d, fifth enclosure 42e, and sixth enclosure 42f are all connected to the first orthodontic appliance body 10, the boundary areas between the first enclosure 42a, second enclosure 42b, third enclosure 42c, fourth enclosure 42d, fifth enclosure 42e, and sixth enclosure 42f and the first orthodontic appliance body 10 are in the shape of a "I".

[0377] Optionally, the first enclosure 42a, the second enclosure 42b, the third enclosure 42c, the fourth enclosure 42d, the fifth enclosure 42e, and the sixth enclosure 42f can all be connected to either the first or second orthodontic appliance body 10 or the second orthodontic appliance body 20. Alternatively, a portion of the first enclosure 42a, the second enclosure 42b, the third enclosure 42c, the fourth enclosure 42d, the fifth enclosure 42e, and the sixth enclosure 42f can be connected to the first orthodontic appliance body 10, and another portion can be connected to the second orthodontic appliance body 20.

[0378] When the first surrounding wall 42a, the second surrounding wall 42b, the third surrounding wall 42c, the fourth surrounding wall 42d, the fifth surrounding wall 42e and the sixth surrounding wall 42f are all connected to the first appliance body 10 or the second appliance body 20, the first surrounding wall 42a, the second surrounding wall 42b, the third surrounding wall 42c, the fourth surrounding wall 42d, the fifth surrounding wall 42e and the sixth surrounding wall 42f can be arranged at intervals or at least partially connected.

[0379] Next, with reference to FIGS. 64 to 67, taking the retention group 40 in the posterior tooth area of the first appliance body 10 as an example, the cooperation form between the plurality of surrounding walls 42 and the plurality of protrusions 41 will be introduced. Taking the first side E1 as the lower side in the figure, the third side E3 as the upper side in the figure, the second side E2 as the left side in the figure, the fourth side E4 as the right side in the figure, and the surrounding wall 42 being located in the posterior tooth area of the first appliance body 10 as an example. For the sake of convenience of description, the first surrounding wall 42a, the second surrounding wall 42b, the third surrounding wall 42c and the fourth surrounding wall 42d are taken as examples.

[0380] In the first specific example, referring to FIG. 64, the first surrounding wall 42a is located on the first side E1 of the first protrusion 41a, and the second surrounding wall 42b is located on the second side E2 of the second protrusion 41b. The first surrounding wall 42a is connected to the second surrounding wall 42b, and the first protrusion 41a and the second protrusion 41b are integrated. The first surrounding wall 42a and the second surrounding wall 42b can limit the relative movement of the second appliance body 20 with respect to the first appliance body 10 in the directions of the lower side and the left side.

[0381] The first surrounding wall 42a and the second surrounding wall 42b are "L"-shaped in a cross-section parallel to the horizontal plane X.

[0382] In the second specific example, referring to FIG. 65, the first surrounding wall 42a is located on the first side E1 of the first protrusion 41a, the second surrounding wall 42b is located on the second side E2 of the second protrusion 41b, and the third surrounding wall 42c is located on the third side E3 of the third protrusion 41c. The first surrounding wall 42a, the second surrounding wall 42b and the third surrounding wall 42c are connected in sequence, and the first protrusion 41a, the second protrusion 41b and the third protrusion 41c are integrated. The first surrounding wall 42a, the second surrounding wall 42b and the third surrounding wall 42c can limit the relative movement of the second appliance body 20 with respect to the first appliance body 10 in the directions of the lower side, the left side and the upper side.

[0383] The first surrounding wall 42a, the second surrounding wall 42b and the third surrounding wall 42c are "匚"-shaped in a cross-section parallel to the horizontal plane X.

[0384] In the third specific example, referring to FIG. 66, the first surrounding wall 42a is located on the first side E1 of the first protrusion 41a, the second surrounding wall 42b is located on the second side E2 of the second protrusion 41b, and the fourth surrounding wall 42d is located on the fourth side E4 of the fourth protrusion 41d. The first surrounding wall 42a, the second surrounding wall 42b, and the fourth surrounding wall 42d are connected in sequence, and the first protrusion 41a, the second protrusion 41b, and the fourth protrusion 41d are integrated. The first surrounding wall 42a, the second surrounding wall 42b, and the fourth surrounding wall 42d can limit the relative movement of the second appliance body 20 relative to the first appliance body 10 in the downward, left, and right directions.

[0385] The cross-section of the first surrounding wall 42a, the second surrounding wall 42b, and the fourth surrounding wall 42d parallel to the horizontal plane X is in a "U" shape.

[0386] It can be seen that when the first surrounding wall 42a, the second surrounding wall 42b, the third surrounding wall 42c, and the fourth surrounding wall 42d are all connected to the first appliance body 10 or the second appliance body 20, the first surrounding wall 42a, the second surrounding wall 42b, the third surrounding wall 42c, and the fourth surrounding wall 42d can be connected to form various matching forms to achieve multi-directional limiting. The connected multiple surrounding walls 42 can improve the strength and forming convenience of the surrounding wall 42, and the connected multiple protrusions 41 can improve the strength and forming convenience of the protrusion 41.

[0387] Next, referring to FIGS. 67 to 75, various layout forms of the multiple retention groups 40 of the entire appliance assembly 300 will be introduced. The multiple retention groups 40 can limit the relative movement of the first appliance body 10 and the second appliance body 20 in the entire first plane. Taking the example where all the surrounding walls 42 are connected to the first appliance body 10.

[0388] In the first specific example, referring to FIG. 67, the multiple retention groups 40 include two retention groups respectively located in the first posterior tooth area C11 and the anterior tooth area C3, and the two retention groups are spaced apart from each other.

[0389] The surrounding wall 42 includes the first surrounding wall 42a, the second surrounding wall 42b located in the first posterior tooth area C11, and the third surrounding wall 42c, the fourth surrounding wall 42d located in the anterior tooth area C3. The corresponding first protrusion 41a and the second protrusion 41b are integrated, and the third protrusion 41c and the fourth protrusion 41d are integrated.

[0390] The first surrounding wall 42a and the third surrounding wall 42c cooperate to limit the relative movement of the first appliance body 10 and the second appliance body 20 in the first direction Y1, and the second surrounding wall 42b and the fourth surrounding wall 42d cooperate to limit the relative movement of the first appliance body 10 and the second appliance body 20 in the second direction X1.

[0391] The fourth enclosure wall 42d restricts the rotation of the fourth protrusion 41d in the clockwise direction Z1 along the dental arch, that is, the fourth enclosure wall 42d coincides with the fifth enclosure wall 42e. The fourth enclosure wall 42d and the fifth enclosure wall 42e form a single enclosure wall, and the fourth protrusion 41d and the fifth protrusion 41e form a single protrusion.

[0392] The first enclosure 42a restricts the first protrusion 41a from rotating counterclockwise in the dental arch direction Z2, that is, the first enclosure 42a coincides with the sixth enclosure 42f. The first enclosure 42a and the sixth enclosure 42f form a single enclosure, and the first protrusion 41a and the sixth protrusion 41f form a single protrusion.

[0393] The first specific example achieves omnidirectional positioning of the first orthodontic appliance body 10 and the second orthodontic appliance body 20 across the entire first plane through the first enclosure 42a and the second enclosure 42b located in the first posterior tooth region C11, and the third enclosure 42c and the fourth enclosure 42d located in the anterior tooth region C3.

[0394] Optionally, the retention group 40 located in the first posterior tooth region C11 can be regarded as a retention group. A retention group realizes the movement limit in the negative direction of the first direction Y1, the movement limit in the negative direction of the second direction X1, and the rotation limit in the counterclockwise direction Z2. That is, the retention group 40 located in the first posterior tooth region C11 realizes partial limitation.

[0395] Alternatively, the retention group 40 located in the first posterior tooth region C11 can be considered as including the first retention group 40a (or the sixth retention group 40f) and the second retention group 40b as described above. The first retention group 40a and the second retention group 40b are connected, and the first retention group 40a and the second retention group 40b cooperate with each other to achieve partial restraint.

[0396] The retention group 40 located in the anterior tooth region C3 can be regarded as a retention group. A retention group realizes the movement limit in the positive direction of the first direction Y1, the movement limit in the positive direction of the second direction X1, and the rotation limit in the clockwise direction Z1. That is, the retention group 40 located in the anterior tooth region C3 realizes partial limitation.

[0397] Alternatively, the retention group 40 located in the C3 region of the anterior teeth can be considered as including the third retention group 40c and the fourth retention group 40d (the fifth retention group 40e) as described above. The third retention group 40c and the fourth retention group 40d are connected, and the third retention group 40c and the fourth retention group 40d cooperate with each other to achieve partial restraint.

[0398] Referring to Figure 68, which is a schematic diagram of the second specific example, the multiple retention groups 40 include two retention groups located in the first posterior tooth region C11 and the second posterior tooth region C21, respectively, with the two retention groups spaced apart from each other.

[0399] The enclosure 42 includes a first enclosure 42a and a third enclosure 42c located in the first posterior tooth region C11, and a second enclosure 42b and a fourth enclosure 42d located in the second posterior tooth region C21. The corresponding first protrusion 41a and third protrusion 41c are connected as one unit, and the second protrusion 41b and fourth protrusion 41d are connected as one unit.

[0400] The first enclosure 42a and the third enclosure 42c cooperate to restrict the relative movement of the first orthodontic appliance body 10 and the second orthodontic appliance body 20 in the first direction Y1. The second enclosure 42b and the fourth enclosure 42d cooperate to restrict the relative movement of the first orthodontic appliance body 10 and the second orthodontic appliance body 20 in the second direction X1.

[0401] The third enclosure 42c restricts the rotation of the third protrusion 41c in the clockwise direction Z1 along the dental arch, that is, the third enclosure 42c coincides with the fifth enclosure 42e. The third enclosure 42c and the fifth enclosure 42e form a single enclosure, and the third protrusion 41c and the fifth protrusion 41e form a single protrusion.

[0402] The first enclosure 42a restricts the first protrusion 41a from rotating counterclockwise in the dental arch direction Z2, that is, the first enclosure 42a coincides with the sixth enclosure 42f. The first enclosure 42a and the sixth enclosure 42f form a single enclosure, and the first protrusion 41a and the sixth protrusion 41f form a single protrusion.

[0403] The second specific example achieves omnidirectional positioning of the first orthodontic appliance body 10 and the second orthodontic appliance body 20 across the entire first plane through the first enclosure 42a and the third enclosure 42c located in the first posterior tooth region C11, and the second enclosure 42b and the fourth enclosure 42d located in the second posterior tooth region C21.

[0404] Optionally, the retention group 40 located in the first posterior tooth region C11 can be regarded as a retention group. A retention group realizes the movement limit in the positive direction of the first direction Y1, the movement limit in the negative direction of the first direction Y1, the rotation limit in the clockwise direction Z1 and the rotation limit in the counterclockwise direction Z2. That is, the retention group 40 located in the first posterior tooth region C11 realizes partial limitation.

[0405] Alternatively, the retention group 40 located in the first posterior tooth region C11 can be considered as including the first retention group 40a (or the sixth retention group 40f) and the third retention group 40c (or the fifth retention group 40e) as described above. The first retention group 40a and the third retention group 40c are connected, and the first retention group 40a and the third retention group 40c cooperate with each other to achieve partial restraint.

[0406] The retention group 40 located in the second posterior tooth region C21 can be regarded as a retention group. A retention group realizes the movement limitation in the positive direction of the second direction X1 and the movement limitation in the negative direction of the second direction X1. That is, the retention group 40 located in the second posterior tooth region C21 realizes partial limitation.

[0407] Alternatively, the retention group 40 located in the second posterior tooth region C21 can be considered as including the second retention group 40b and the fourth retention group 40d as described above. The second retention group 40b and the fourth retention group 40d are connected, and the second retention group 40b and the fourth retention group 40d cooperate with each other to achieve partial restraint.

[0408] Referring to Figure 69, which is a schematic diagram of the third specific example, the difference between the third specific example and the first specific example is that the third specific example also includes a third wall 42c located in the first posterior tooth region C11, which can further improve the stability of the fit between the first orthodontic appliance body 10 and the second orthodontic appliance body 20.

[0409] Referring to Figure 70, which is a schematic diagram of the fourth specific example, the difference between the fourth specific example and the first specific example is that the fourth specific example also includes a fourth wall 42d located in the first posterior tooth region C11, which can further improve the stability of the fit between the first orthodontic appliance body 10 and the second orthodontic appliance body 20.

[0410] Referring to Figure 71, which is a schematic diagram of the fifth specific example, the multiple retention groups 40 include three retention groups 40 located in the first posterior tooth region C11, the anterior tooth region C3 and the second posterior tooth region C21 respectively, with the three retention groups 40 spaced apart from each other.

[0411] The enclosure 42 includes a first enclosure 42a and a second enclosure 42b located in the first posterior tooth region C11, a third enclosure 42c located in the anterior tooth region C3, and a first enclosure 42a and a fourth enclosure 42d located in the second posterior tooth region C21.

[0412] The first enclosure 42a and the third enclosure 42c cooperate to restrict the relative movement of the first orthodontic appliance body 10 and the second orthodontic appliance body 20 in the first direction Y1, and the second enclosure 42b and the fourth enclosure 42d cooperate to restrict the relative movement of the first orthodontic appliance body 10 and the second orthodontic appliance body 20 in the second direction X1.

[0413] The first wall 42a located in the second posterior tooth region C21 restricts the rotation of the first protrusion 41c in the clockwise direction Z1 along the dental arch, that is, the first wall 42a located in the second posterior tooth region C21 coincides with the fifth wall 42e. The first wall 42a and the fifth wall 42e are a single wall, and the first protrusion 41a and the fifth protrusion 41e are a single protrusion.

[0414] The first wall 42a located in the first posterior tooth region C11 restricts the rotation of the first protrusion 41a in the counterclockwise direction Z2 along the dental arch, that is, the first wall 42a located in the first posterior tooth region C11 coincides with the sixth wall 42f. The first wall 42a and the sixth wall 42f are a single wall, and the first protrusion 41a and the sixth protrusion 41f are a single protrusion.

[0415] The fifth specific example achieves omnidirectional positioning of the first orthodontic appliance body 10 and the second orthodontic appliance body 20 across the entire first plane through the first enclosure 42a and the second enclosure 42b located in the first posterior tooth region C11, the third enclosure 42c located in the anterior tooth region C3, and the first enclosure 42a and the fourth enclosure 42d located in the second posterior tooth region C21.

[0416] Optionally, the retention group 40 located in the first posterior tooth region C11 can be regarded as a retention group. A retention group realizes the movement limit in the negative direction of the first direction Y1, the movement limit in the negative direction of the second direction X1, and the rotation limit in the counterclockwise direction Z2. That is, the retention group 40 located in the first posterior tooth region C11 realizes partial limitation.

[0417] Alternatively, the retention group 40 located in the first posterior tooth region C11 can be considered as including the first retention group 40a (or the sixth retention group 40f) and the second retention group 40b as described above. The first retention group 40a and the second retention group 40b are connected, and the first retention group 40a and the second retention group 40b cooperate with each other to achieve partial restraint.

[0418] The retention group 40 located in the second posterior tooth region C21 can be regarded as a retention group. A retention group realizes the movement limit in the negative direction of the first direction Y1, the movement limit in the positive direction of the second direction X1, and the rotation limit in the clockwise direction Z1. That is, the retention group 40 located in the second posterior tooth region C21 realizes partial limitation.

[0419] Alternatively, the retention group 40 located in the second posterior tooth region C21 can be considered as including the first retention group 40a and the fourth retention group 40d as described above, with the first retention group 40a and the fourth retention group 40d connected. The first retention group 40a and the fourth retention group 40d cooperate with each other to achieve partial restraint.

[0420] The retention group 40 located in the anterior tooth region C3 can be regarded as a retention group. A retention group realizes the movement limit in the positive direction of the first direction Y1, that is, the retention group 40 located in the anterior tooth region C3 realizes partial limitation.

[0421] Referring to Figure 72, which is a schematic diagram of the sixth specific example, the multiple retention groups 40 include three retention groups 40 located in the first posterior tooth region C11, the anterior tooth region C3 and the second posterior tooth region C21 respectively, with the three retention groups 40 spaced apart from each other.

[0422] The enclosure 42 includes a first enclosure 42a and a third enclosure 42c located in the first posterior tooth region C11, a second enclosure 42b located in the anterior tooth region C3, and a fourth enclosure 42d located in the second posterior tooth region C21.

[0423] The first enclosure 42a and the third enclosure 42c cooperate to restrict the relative movement of the first orthodontic appliance body 10 and the second orthodontic appliance body 20 in the first direction Y1, and the second enclosure 42b and the fourth enclosure 42d cooperate to restrict the relative movement of the first orthodontic appliance body 10 and the second orthodontic appliance body 20 in the second direction X1.

[0424] The third enclosure 42c restricts the third protrusion 41c from rotating clockwise in the dental arch direction Z1, that is, the third enclosure 42c coincides with the fifth enclosure 42e. The third enclosure 42c and the fifth enclosure 42e form a single enclosure, and the third protrusion 41c and the fifth protrusion 41e form a single protrusion.

[0425] The first enclosure 42a restricts the first protrusion 41a from rotating counterclockwise in the direction Z2 along the dental arch, that is, the first enclosure 42a coincides with the sixth enclosure 42f. The first enclosure 42a and the sixth enclosure 42f form a single enclosure, and the first protrusion 41a and the sixth protrusion 41f form a single protrusion.

[0426] The sixth specific example achieves omnidirectional limiting across the entire first plane through the first enclosure 42a and the third enclosure 42c located in the first posterior tooth region C11, the second enclosure 42b located in the anterior tooth region C3, and the fourth enclosure 42d located in the second posterior tooth region C21.

[0427] Optionally, the retention group 40 located in the first posterior tooth region C11 can be regarded as a retention group. A retention group realizes the movement limit in the positive direction of the first direction Y1, the movement limit in the positive direction of the first direction Y1, the rotation limit in the clockwise direction Z1, and the rotation limit in the counterclockwise direction Z2. That is, the retention group 40 located in the first posterior tooth region C11 realizes partial limitation.

[0428] Alternatively, the retention group 40 located in the first posterior tooth region C11 can be considered as including the first retention group 40a (or the sixth retention group 40f) and the third retention group 40c (or the fifth retention group 40e) as described above. The first retention group 40a and the third retention group 40c are connected, and the cooperation between the first retention group 40a and the third retention group 40c also achieves partial restraint.

[0429] The retention group 40 located in the second posterior tooth region C21 can be regarded as a retention group. A retention group realizes the movement limit in the positive direction of the second direction X1, that is, the retention group 40 located in the second posterior tooth region C21 realizes partial limitation.

[0430] The retention group 40 located in the anterior tooth region C3 can be regarded as a retention group. A retention group realizes the movement limitation in the negative direction of the second direction X1, that is, the retention group 40 located in the anterior tooth region C3 realizes partial limitation.

[0431] Referring to Figure 73, which is a schematic diagram of the seventh specific example, the multiple retention groups 40 include three retention groups 40 located in the first posterior tooth region C11, the anterior tooth region C3 and the second posterior tooth region C21 respectively, with the three retention groups 40 spaced apart from each other.

[0432] The enclosure 42 includes a first enclosure 42a and a second enclosure 42b located in the first posterior tooth region C11, a third enclosure 42c located in the anterior tooth region C3, and a first enclosure 42a, a second enclosure 42b, and a fourth enclosure 42d located in the second posterior tooth region C21.

[0433] The first enclosure 42a and the third enclosure 42c cooperate to restrict the relative movement of the first orthodontic appliance body 10 and the second orthodontic appliance body 20 in the first direction Y1, and the second enclosure 42b and the fourth enclosure 42d cooperate to restrict the relative movement of the first orthodontic appliance body 10 and the second orthodontic appliance body 20 in the second direction X1.

[0434] The first wall 42a located in the second posterior tooth region C21 restricts the first protrusion 41a from rotating clockwise in the dental arch direction Z1, that is, the first wall 42a coincides with the fifth wall 42e. The first wall 42a and the fifth wall 42e are a single wall, and the first protrusion 41a and the fifth protrusion 41e are a single protrusion.

[0435] The first wall 42a located in the first posterior tooth region C11 restricts the first protrusion 41a from rotating counterclockwise in the direction Z2 along the dental arch, that is, the first wall 42a coincides with the sixth wall 42f. The first wall 42a and the sixth wall 42f are a single wall, and the first protrusion 41a and the sixth protrusion 41f are a single protrusion.

[0436] The seventh specific example achieves omnidirectional positioning of the first orthodontic appliance body 10 and the second orthodontic appliance body 20 across the entire first plane through the first enclosure 42a and the second enclosure 42b located in the first posterior tooth region C11, the third enclosure 42c located in the anterior tooth region C3, and the first enclosure 42a, the second enclosure 42b, and the fourth enclosure 42d located in the second posterior tooth region C21.

[0437] Optionally, the retention group 40 located in the first posterior tooth region C11 can be considered to include the first retention group 40a (or the sixth retention group 40f) and the second retention group 40b as described above. The first retention group 40a and the second retention group 40b are spaced apart from each other. The first retention group 40a achieves movement limitation in the negative direction of the first direction Y1 and rotation limitation in the counterclockwise direction Z2. The second retention group 40b achieves movement limitation in the negative direction of the second direction X1. That is, the retention group 40 in the first posterior tooth region C11 achieves partial limitation.

[0438] The retention group 40 located in the second posterior region C21 can be considered as including the first retention group 40a (or the fifth retention group 40e), the second retention group 40b, and the fourth retention group 40d as described above. The first retention group 40a and the fourth retention group 40d are connected to each other, and the first retention group 40a and the second retention group 40b are spaced apart from each other. The first retention group 40a achieves movement limitation in the negative direction of the first direction Y1 and rotation limitation in the clockwise direction Z1. The second retention group 40b achieves movement limitation in the negative direction of the second direction X1. The fourth retention group 40d achieves movement limitation in the positive direction of the second direction X1. That is, the retention group 40 in the second posterior region C21 achieves partial limitation.

[0439] The retention group 40 located in the anterior tooth region C3 can be regarded as a retention group. A retention group realizes the movement limit in the positive direction of the first direction Y1, that is, the retention group 40 located in the anterior tooth region C3 realizes partial limitation.

[0440] Referring to Figure 74, which is a schematic diagram of the eighth specific example, the multiple retention groups 40 include four retention groups 40 located in the first posterior tooth region C11, the first anterior tooth region C31, the second posterior tooth region C21, and the second anterior tooth region C32, respectively, and the four retention groups 40 are connected in pairs.

[0441] The retention group 40 of the first posterior region C11 and the retention group 40 of the first anterior region C31 can be separated by the first dashed line G1 in Figure 74. The retention group 40 of the first anterior region C31 is located to the upper right of the first dashed line G1, and the retention group 40 of the first posterior region C11 is located to the lower left of the first dashed line G1.

[0442] The retention group 40 of the first posterior tooth region C11 is connected to the retention group 40 of the first anterior tooth region C31. The two retention groups 40 extend from the first posterior tooth region C11 to the first anterior tooth region C31, and the two retention groups 40 form a continuous structure.

[0443] The retention group 40 of the second posterior region C21 and the retention group 40 of the second anterior region C32 can be separated by the second dashed line G2 in Figure 74. The retention group 40 of the second anterior region C32 is located to the upper left of the second dashed line G2, and the retention group 40 of the second posterior region C21 is located to the lower right of the second dashed line G2.

[0444] The retention group 40 of the second posterior region C21 is connected to the retention group 40 of the second anterior region C32. The two retention groups 40 extend from the second posterior region C21 to the second anterior region C32, forming a continuous structure.

[0445] The enclosure 42 includes a first enclosure 42a, a second enclosure 42b and a fourth enclosure 42d located in the first posterior tooth region C11, a second enclosure 42b, a third enclosure 42c and a fourth enclosure 42d located in the first anterior tooth region C31, a first enclosure 42a, a second enclosure 42b and a fourth enclosure 42d located in the second posterior tooth region C21, and a second enclosure 42b, a third enclosure 42c and a fourth enclosure 42d located in the second anterior tooth region C32.

[0446] The first enclosure 42a and the third enclosure 42c cooperate to restrict the relative movement of the first orthodontic appliance body 10 and the second orthodontic appliance body 20 in the first direction Y1, and the second enclosure 42b and the fourth enclosure 42d cooperate to restrict the relative movement of the first orthodontic appliance body 10 and the second orthodontic appliance body 20 in the second direction X1.

[0447] The first wall 42a located in the second posterior tooth region C21 restricts the first protrusion 41a from rotating clockwise in the dental arch direction Z1, that is, the first wall 42a coincides with the fifth wall 42e. The first wall 42a and the fifth wall 42e are a single wall, and the first protrusion 41a and the fifth protrusion 41e are a single protrusion.

[0448] The first wall 42a located in the first posterior tooth region C11 restricts the first protrusion 41a from rotating counterclockwise in the direction Z2 along the dental arch, that is, the first wall 42a coincides with the sixth wall 42f. The first wall 42a and the sixth wall 42f are a single wall, and the first protrusion 41a and the sixth protrusion 41f are a single protrusion.

[0449] In addition, the third wall 42c located in the first posterior tooth region C11 can also be regarded as the fifth wall 42e, and the third wall 42c located in the second posterior tooth region C21 can also be regarded as the sixth wall 42f.

[0450] The eighth specific example achieves omnidirectional positioning of the first orthodontic appliance body 10 and the second orthodontic appliance body 20 across the entire first plane through the first enclosure 42a, the second enclosure 42b and the fourth enclosure 42d located in the first posterior tooth region C11, the second enclosure 42b, the third enclosure 42c and the fourth enclosure 42d located in the first anterior tooth region C31, the first enclosure 42a, the second enclosure 42b and the fourth enclosure 42d located in the second posterior tooth region C21, and the second enclosure 42b, the third enclosure 42c and the fourth enclosure 42d located in the second anterior tooth region C32.

[0451] Optionally, the retention group 40 located in the first posterior tooth region C11 can be regarded as a retention group. A retention group realizes the movement limit in the negative direction of the first direction Y1, the movement limit in the positive direction of the second direction X1, the movement limit in the negative direction of the second direction X1, and the rotation limit in the counterclockwise direction Z2. That is, the retention group 40 located in the first posterior tooth region C11 realizes partial limitation.

[0452] Alternatively, the retention group 40 located in the first posterior tooth region C11 can be considered as including the first retention group 40a (or the sixth retention group 40f), the third retention group 40c, and the fourth retention group 40d as described above. The first retention group 40a, the second retention group 40b, and the fourth retention group 40d are connected, and the first retention group 40a, the second retention group 40b, and the fourth retention group 40d cooperate with each other to achieve partial restraint.

[0453] The retention group 40 located in the first anterior tooth region C31 can be regarded as a retention group. A retention group realizes the movement limit in the positive direction of the first direction Y1, the movement limit in the positive direction of the second direction X1, the movement limit in the negative direction of the second direction X1, and the rotation limit in the clockwise direction Z1. That is, the retention group 40 located in the first anterior tooth region C31 realizes partial limitation.

[0454] Alternatively, the retention group 40 located in the first anterior tooth region C31 can be considered as including the second retention group 40b, the third retention group 40c (or the fifth retention group 40e), and the fourth retention group 40d as described above. The second retention group 40b, the third retention group 40c, and the fourth retention group 40d are connected, and they cooperate with each other to achieve partial restraint.

[0455] The explanations for the second posterior region C21 and the second anterior region C32 can be found in the explanations for the first posterior region C11 and the first anterior region C31, and will not be repeated here.

[0456] Referring to Figure 75, which is a schematic diagram of the ninth specific example, the multiple retention groups 40 include two retention groups 40 located in the first anterior region C31 and the second anterior region C32 respectively, and the two retention groups 40 are connected.

[0457] The retention groups 40 of the first anterior region C31 and the retention groups 40 of the second anterior region C32 can be separated by the dental midline C in Figure 75. The group to the left of the dental midline C is the retention group 40 of the first anterior region C31, and the group to the right of the dental midline C is the retention group 40 of the second anterior region C32.

[0458] The retention group 40 of the first anterior region C31 and the retention group 40 of the second anterior region C32 are interconnected. The two retention groups 40 extend from the first anterior region C31 to the second anterior region C32, forming a continuous structure.

[0459] The enclosure 42 includes a first enclosure 42a, a second enclosure 42b, and a third enclosure 42c located in the first anterior tooth region C31, and a first enclosure 42a, a third enclosure 42c, and a fourth enclosure 42d located in the second anterior tooth region C32.

[0460] The first enclosure 42a and the third enclosure 42c cooperate to restrict the relative movement of the first orthodontic appliance body 10 and the second orthodontic appliance body 20 in the first direction Y1, and the second enclosure 42b and the fourth enclosure 42d cooperate to restrict the relative movement of the first orthodontic appliance body 10 and the second orthodontic appliance body 20 in the second direction X1.

[0461] The fourth wall 42d located in the second anterior tooth region C32 restricts the fourth protrusion 41d from rotating clockwise in the direction Z1 along the dental arch. That is, the fourth wall 42d coincides with the fifth wall 42e, the fourth wall 42d and the fifth wall 42e form a wall, and the fourth protrusion 41d and the fifth protrusion 41e form a protrusion.

[0462] The second wall 42b located in the first anterior tooth region C31 restricts the second protrusion 41b from rotating counterclockwise in the direction Z2 along the dental arch, that is, the second wall 42b coincides with the sixth wall 42f, the second wall 42b and the sixth wall 42f are one wall, and the second protrusion 41b and the sixth protrusion 41f are one protrusion.

[0463] The eighth specific example achieves omnidirectional positioning of the first orthodontic appliance body 10 and the second orthodontic appliance body 20 throughout the first plane through the first enclosure 42a, the second enclosure 42b and the third enclosure 42c located in the first anterior tooth region C31, and the first enclosure 42a, the third enclosure 42c and the fourth enclosure 42d located in the second anterior tooth region C32.

[0464] Optionally, the retention group 40 located in the first anterior tooth region C31 can be regarded as a retention group. A retention group realizes the movement limit in the positive direction of the first direction Y1, the movement limit in the negative direction of the first direction Y1, the movement limit in the negative direction of the second direction X1, and the rotation limit in the counterclockwise direction Z2. That is, the retention group 40 located in the first anterior tooth region C31 realizes partial limitation.

[0465] Alternatively, the retention group 40 located in the first anterior tooth region C31 can be considered as including the first retention group 40a, the second retention group 40b (or the sixth retention group 40f) and the third retention group 40c as described above. The first retention group 40a, the second retention group 40b and the third retention group 40c are connected, and the first retention group 40a, the second retention group 40b and the third retention group 40c cooperate with each other to achieve partial restraint.

[0466] The retention group 40 located in the second anterior tooth region C32 can be regarded as a retention group. A retention group realizes the movement limit in the positive direction of the first direction Y1, the movement limit in the negative direction of the first direction Y1, the movement limit in the positive direction of the second direction X1, and the rotation limit in the clockwise direction Z1. That is, the retention group 40 located in the second anterior tooth region C32 realizes partial limitation.

[0467] Alternatively, the retention group 40 located in the second anterior region C32 can be considered as including the first retention group 40a, the third retention group 40c, and the fourth retention group 40d (or the fifth retention group 40e) as described above. The first retention group 40a, the third retention group 40c, and the fourth retention group 40d are connected, and their cooperation also achieves partial restraint.

[0468] Optionally, referring to Figure 62, the orthodontic appliance assembly 300 further includes a first limiting structure 51 connecting the enclosure 42 and a second limiting structure 52 connecting the protrusion 41. When the first orthodontic appliance body 10 and the second orthodontic appliance body 20 are in an engaged state, the first limiting structure 51 and the second limiting structure 52 cooperate to restrict the relative movement of the first orthodontic appliance body 10 and the second orthodontic appliance body 20 in the vertical Z direction.

[0469] Multiple retention groups 40 can restrict the relative movement of the first orthodontic appliance body 10 and the second orthodontic appliance body 20 in the first plane, and the first limiting structure 51 and the second limiting structure 52 can restrict the relative movement of the first orthodontic appliance body 10 and the second orthodontic appliance body 20 in the vertical Z direction. In this way, multi-directional limiting between the first orthodontic appliance body 10 and the second orthodontic appliance body 20 can be achieved.

[0470] Optionally, the first limiting structure 51 and the second limiting structure 52 are located in at least one of the first retaining group 40a, the second retaining group 40b, the third retaining group 40c, the fourth retaining group 40d, the fifth retaining group 40e and the sixth retaining group 40f.

[0471] Optionally, the first limiting structure 51 and the second limiting structure 52 are located in the first fixation group 40a and the third fixation group 40c, that is, the first limiting structure 51 and the second limiting structure 52 are located on opposite sides (first side E1 and third side E3) of the cheek-tongue direction Y1.

[0472] Alternatively, the first limiting structure 51 and the second limiting structure 52 are located in the second retention group 40b and the fourth retention group 40d, that is, the first limiting structure 51 and the second limiting structure 52 are located on opposite sides (second side E2 and fourth side E4) in the dental arch direction X1.

[0473] Further descriptions of the first limiting structure 51 and the second limiting structure 52 can be found in the first embodiment, and will not be repeated here.

[0474] In summary, in the second embodiment of this application, when the relative movement of the first orthodontic appliance body 10 and the second orthodontic appliance body 20 in the buccal-lingual direction Y1 and the dental arch direction X1 is restricted by multiple retention groups 40, the buccal-lingual direction Y1 and the dental arch direction X1 are two different directions, which can realize the relative movement of the first orthodontic appliance body 10 and the second orthodontic appliance body 20 in the entire first plane, and ensure the stable cooperation between the first orthodontic appliance body 10 and the second orthodontic appliance body 20.

[0475] Referring to Figures 76 to 79, the third embodiment of this application provides an orthodontic appliance assembly 300.

[0476] The orthodontic appliance assembly 300 includes a first orthodontic appliance 100 corresponding to the first jaw and a second orthodontic appliance 200 corresponding to the second jaw.

[0477] The first orthodontic appliance 100 includes a first orthodontic appliance body 10 and a groove 121 protruding from the first occlusal surface A1 of the first orthodontic appliance body 10. The second orthodontic appliance 200 includes a second orthodontic appliance body 20 and a protrusion 221 protruding from the second occlusal surface A2 of the second orthodontic appliance body 20.

[0478] Both the groove 121 and the protrusion 221 extend from the posterior tooth region to the anterior tooth region on one side of the dental midline C. The groove 121 is formed by combining a first block 111 and a second block 112. The first block 111 and the second block 112 are both discontinuous on the buccal and lingual sides, while the protrusion 221 is a continuous structure. When the first orthodontic appliance 100 and the second orthodontic appliance 200 are in occlusal position, the groove 121 and the protrusion 221 cooperate to restrict the relative movement of the first orthodontic appliance 100 and the second orthodontic appliance 200 in at least some directions within the horizontal plane.

[0479] "Both groove 121 and protrusion 221 extend from the posterior tooth region to the anterior tooth region on one side of the dental midline C" means that the orthodontic appliance assembly 300 includes a first semi-maxillary region C1 and a second semi-maxillary region C2 located on both sides of the dental midline C. The groove 121 extends from the posterior tooth region of the first semi-maxillary region C1 to the anterior tooth region, and the protrusion 221 extends from the posterior tooth region of the first semi-maxillary region C1 to the anterior tooth region.

[0480] "The first block 111 and the second block 112 are both disconnected on the buccal and lingual sides" means that the first block 111 and the second block 112 are connected only through the first occlusal surface A1, and the first block 111 and the second block 112 are disconnected from each other on the buccal side and on the lingual side. The entire groove 121 has a disconnected area as it extends from the posterior tooth area to the anterior tooth area.

[0481] "Protrusion 221 is a continuous structure" means that the entire protrusion 221 is not interrupted as it extends from the posterior tooth region to the anterior tooth region.

[0482] When the first orthodontic appliance 100 and the second orthodontic appliance 200 are in an occlusal state, the protrusion 221 extends from the first block 111 to the second block 112 to achieve mutual engagement between the protrusion 221 and the entire groove 121. The mutual engagement between the groove 121 and the protrusion 221 allows the first orthodontic appliance 100 and the second orthodontic appliance 200 to maintain a preset relative position, thereby achieving tooth correction and retention, such as jaw position adjustment.

[0483] In this embodiment, the first orthodontic appliance 100 and the second orthodontic appliance 200 are connected by a groove 121 and a protrusion 221. The groove 121 includes a first block 111 and a second block 112 that are disconnected from each other on the cheek side and the tongue side. The groove 121 is not a completely continuous structure, which makes it easy for the protrusion 221 to enter the groove 121 and achieve positioning.

[0484] In this embodiment, the groove 121 and the protrusion 221 are located on the first occlusal surface A1 and the second occlusal surface A2, respectively. When the patient wears the orthodontic appliance assembly 300, the groove 121 and the protrusion 221 will not interfere with the lip and cheek muscles, which can greatly improve the patient's experience.

[0485] During the molding process of the first orthodontic appliance 100 and the second orthodontic appliance 200, adhesion problems may occur. Generally, the closer the distance between the structures, the more serious the adhesion problem. In this embodiment, the first block 111 and the second block 112 of the groove 121 are disconnected from each other, which can reduce or avoid the adhesion problem.

[0486] Optionally, both the first orthodontic appliance 100 and the second orthodontic appliance 200 are invisible orthodontic appliances made of polymer materials, with one of the first and second jaws being the maxilla and the other the mandible. This embodiment uses the first jaw as the maxilla and the second jaw as the mandible as an example.

[0487] The first orthodontic appliance body 10 forms a first cavity S1 to accommodate the first dentition, and the second orthodontic appliance body 20 forms a second cavity S2 to accommodate the second dentition. When the patient wears the orthodontic appliance assembly 300, the first orthodontic appliance 100 is worn on the first dentition through the first cavity S1, and the second orthodontic appliance 200 is worn on the second dentition through the second cavity S2.

[0488] Optionally, the groove 121 is integrally formed with the first orthodontic appliance body 10, and the groove 121 forms a first chamber S1' that communicates with the first cavity S1. For example, the first orthodontic appliance 100 can be integrally formed by a hot-press molding process, that is, the first orthodontic appliance body 10 and the groove 121 can be integrally formed by a hot-press molding process, but it is not limited thereto.

[0489] The first chamber S1' is a relatively narrow gap. When the length of the first chamber S1' in the mesiodistal direction is too long, problems such as difficulty in demolding and poor molding effect are likely to occur. The groove 121 of this embodiment includes a first block 111 and a second block 112 that are disconnected from each other on the cheek side and the tongue side. The length of the first block 111 and the second block 112 in the mesiodistal direction is relatively small, which facilitates molding and improves the molding effect.

[0490] Optionally, the protrusion 221 is integrally formed with the second orthodontic appliance body 20, and the protrusion 221 forms a second chamber S2' that communicates with the second cavity S2. For example, the second orthodontic appliance 200 can be integrally formed by a hot-press molding process, that is, the second orthodontic appliance body 20 and the protrusion 221 can be integrally formed by a hot-press molding process, but it is not limited thereto.

[0491] The protrusion 221 is a continuous structure, and the second chamber S2' formed therein is also a continuous structure, which can effectively improve the overall strength of the protrusion 221.

[0492] Optionally, the first orthodontic appliance 100 further includes a first limiting structure 13 connecting the groove 121, and the second orthodontic appliance 200 further includes a second limiting structure 23 connecting the protrusion 221. When the first orthodontic appliance 100 and the second orthodontic appliance 200 are in an engaged state, the first limiting structure 13 and the second limiting structure 23 cooperate with each other to restrict the relative vertical movement of the first orthodontic appliance 100 and the second orthodontic appliance 200.

[0493] When the first orthodontic appliance 100 and the second orthodontic appliance 200 are in an occlusal state, the first limiting structure 13 and the second limiting structure 23 cooperate with each other while the groove 121 and the protrusion 221 engage, simultaneously limiting the first orthodontic appliance 100 and the second orthodontic appliance 200 in both the horizontal and vertical directions. This embodiment achieves multi-dimensional limiting through a simple structure, greatly improving the connection stability between the first orthodontic appliance 100 and the second orthodontic appliance 200, thereby improving the corresponding orthodontic effect, and is convenient for patients to wear themselves.

[0494] Optionally, the groove 121 and the first limiting structure 13 are integrally formed, and the first cavity S1' formed by the groove 121 and the first cavity S1” formed by the first limiting structure 13 are interconnected. This can improve the stability of the connection between the groove 121 and the first limiting structure 13.

[0495] Since the groove 121 includes a first block 111 and a second block 112 that are disconnected from each other on the cheek side and the tongue side, it facilitates the demolding of the first limiting structure 13 and the groove 121, and at the same time, it can improve the molding effect.

[0496] Optionally, the protrusion 221 and the second limiting structure 23 are integrally formed, and the second chamber S2' formed by the protrusion 221 and the second cavity S2” formed by the second limiting structure 23 are interconnected. This can improve the stability of the connection between the protrusion 221 and the second limiting structure 23.

[0497] Optionally, the orthodontic appliance assembly 300 includes two sets of retention groups located in the first hemi-maxillary region C1 and the second hemi-maxillary region C2, respectively. Each retention group includes a groove 121 and a protrusion 221 that cooperate with each other. The two sets of retention groups are symmetrically arranged with respect to the dental midline C.

[0498] Specifically, the first semi-maxillary region C1 includes a groove 121 and a protrusion 221 extending from the posterior tooth region to the anterior tooth region, and the second semi-maxillary region C2 includes a groove 121 and a protrusion 221 extending from the posterior tooth region to the anterior tooth region, which can realize the synchronous positioning of the first semi-maxillary region C1 and the second semi-maxillary region C2, thereby improving the stability of the entire orthodontic appliance assembly 300.

[0499] The specific forms of the groove 121 and the protrusion 221 are described below.

[0500] Referring to Figures 80 to 83, the first block 111 of the groove 121 is entirely located in the posterior tooth region, and the second block 112 is entirely located in the anterior tooth region.

[0501] The first block 111 does not extend into the anterior region, and the second block 112 does not extend into the posterior region. The first block 111 and the second block 112 are approximately disconnected from each other at the boundary between the posterior and anterior regions.

[0502] The second block 112 may be set for at least one of teeth 2-4, but is not limited thereto. The second block 112 does not extend to the central incisors, thus avoiding interference with the normal orthodontic treatment of the central incisors, such as rotation, intrusion, elongation, etc.

[0503] Optionally, referring to Figure 80, the first block 111 includes a first perimeter wall 111a and a second perimeter wall 111b located on the buccal and lingual sides of the first occlusal surface A1, respectively.

[0504] The first occlusal wall 111a extends along the mesiodistal direction on the buccal side of the first occlusal surface A1, and the second occlusal wall 111b extends along the mesiodistal direction on the lingual side of the first occlusal surface A1. The area of ​​the first jaw traversed by the first occlusal wall 111a is approximately the same as the area of ​​the first jaw traversed by the second occlusal wall 111b. For example, the first occlusal wall 111a is located on the buccal side of the three distal molars, and the second occlusal wall 111b is located on the lingual side of the three distal molars.

[0505] The lengths of the first enclosure 111a and the second enclosure 111b in the near-to-far direction are approximately equal, and the near-mid surface of the first enclosure 111a and the near-mid surface of the second enclosure 111b are approximately on the same plane.

[0506] The first chamber S1' formed by the groove 121 includes a cavity formed by the first surrounding wall 111a and a cavity formed by the second surrounding wall 111b.

[0507] The first surrounding wall 111a and the second surrounding wall 111b are arranged face to face, and a space for accommodating the protrusion 221 is formed between the first surrounding wall 111a and the second surrounding wall 111b. When the protrusion 221 is fitted into this space, the relative movement of the first orthodontic appliance 100 and the second orthodontic appliance 200 in the buccolingual direction can be restricted.

[0508] Optionally, as shown in FIG. 81, the first block 111 further includes a fourth surrounding wall 111d connecting the first surrounding wall 111a and the second surrounding wall 111b. The fourth surrounding wall 111d extends in the buccolingual direction, and the fourth surrounding wall 111d is located on the distal side of the first surrounding wall 111a and the second surrounding wall 111b.

[0509] The first chamber S1' formed by the groove 121 may further include a cavity formed by the fourth surrounding wall 111d, and the cavities formed by the first surrounding wall 111a, the second surrounding wall 111b, and the fourth surrounding wall 111d may be mutually connected.

[0510] The first surrounding wall 111a, the fourth surrounding wall 111d, and the second surrounding wall 111b are sequentially connected to form a "匚" shape. The first surrounding wall 111a, the fourth surrounding wall 111d, and the second surrounding wall 111b form a space for accommodating the protrusion 221. When the protrusion 221 is fitted into this space, the relative movement of the first orthodontic appliance 100 and the second orthodontic appliance 200 in the buccolingual direction can be restricted, and the movement of the second orthodontic appliance 200 relative to the first orthodontic appliance 100 in the distal direction can be restricted.

[0511] Optionally, the second block 112 is located on the mesial side of the first block 111, and the second block 112 includes a third surrounding wall 112c extending in the labiolingual direction.

[0512] The first chamber S1' formed by the groove 121 further includes a cavity formed by the third surrounding wall 112c.

[0513] When the protrusion 221 and the third surrounding wall 112c cooperate with each other, the movement of the second orthodontic appliance 200 relative to the first orthodontic appliance 100 in the mesial direction is restricted.

[0514] When the first block 111 includes the first surrounding wall 111a, the fourth surrounding wall 111d and the second surrounding wall 111b, and the second block 112 includes the third surrounding wall 112c, the proximal middle portions of the first surrounding wall 111a and the second surrounding wall 111b are disconnected from the third surrounding wall 112c, and the entire groove 121 is a structure formed by enclosing the spaced "匚" shape and "|" shape. When the protrusion 221 and the groove 121 cooperate with each other, the relative movement of the first orthodontic appliance 100 and the second orthodontic appliance 200 in the entire horizontal plane can be restricted.

[0515] Optionally, the fourth surrounding wall 111d and the surface of the first surrounding wall 111a near the buccal side are in smooth transition, and the fourth surrounding wall 111d and the surface of the second surrounding wall 111b near the lingual side are in smooth transition. The outer contour of the first block 111 is generally a U-shaped structure, and the first distal end surface 1111 of the first block 111 is generally arc-shaped, which can avoid the breakage of the thermoplastic membrane caused by sharp bends and can also avoid the concentration of stress at the corners.

[0516] The first block 111 includes a distal inner surface 1112 disposed opposite to the first distal end surface 1111, and the distal inner surface 1112 is generally arc-shaped. The second distal end surface 211 of the protrusion 221 is generally arc-shaped. When the groove 121 and the protrusion 221 match each other, the distal inner surface 1112 of the first block 111 and the second distal end surface 211 of the protrusion 221 match each other.

[0517] Optionally, referring to FIGS. 82 and 83, the first block 111 includes a ramp section 1113 on the distal side. Taking the first block 111 including the fourth surrounding wall 111d as an example, the ramp section 1113 extends to the fourth surrounding wall **********

[0518] The ramp section 1113 can be formed by enclosing the distal middle section of the first surrounding wall 111a, the fourth surrounding wall 111d and the distal middle section of the second surrounding wall 111b. For example, the ramp section 1113 can be arranged corresponding to the most distal molar.

[0519] The ramp section 1113 shows an increasing trend in the first direction, and the first direction is from the distal to the mesial.

[0520] That the "ramp section 1113 shows an increasing trend in the first direction" means that the ramp section 1113 has a height H in the vertical direction, the first height H1 at the relatively distal position is less than the second height H2 at the relatively mesial position, and the height H shows an increasing trend in the direction from the distal to the mesial.

[0521] The ramp section 1113 can be regarded as formed by cutting off a partial area on the distal side of the first block 111, and the ramp section 1113 retains a part of the fourth surrounding wall 111d, and the height of the fourth surrounding wall 111d is lower than the heights of the first surrounding wall 111a and the second surrounding wall 111b. The arrangement of the ramp section 1113 can further reduce the difficulty of demolding.

[0522] Optionally, the proximal end face 1121 of the third enclosure 112c has an acute angle α facing the distal side between it and the first engagement surface A1. The design of the acute angle α can further reduce the difficulty of demolding.

[0523] Optionally, continuing with Figures 80 to 83, in the posterior tooth region, the first occlusal surface A1 matches the occlusal surface of the first jaw. The first occlusal surface A1 in the posterior tooth region has an anatomical shape that matches the occlusal surface of the first jaw, which can improve the coverage of the first orthodontic appliance 100 on the first jaw.

[0524] The first upper surface 212 of the protrusion 221 in the posterior tooth region, which is far from the second occlusal surface A2, is completely matched with the first occlusal surface A1 in the posterior tooth region, that is, the first upper surface 212 also has an anatomical shape.

[0525] The first block 111 of the groove 121 exposes the first occlusal surface A1 of the posterior tooth region. When the protrusion 221 and the first block 111 of the posterior tooth region cooperate with each other, the first upper end surface 212 of the protrusion 221 is fully matched with the first occlusal surface A1 of the posterior tooth region, which can improve the stability of the cooperation between the protrusion 221 and the first block 111.

[0526] Optionally, in the anterior region, the first occlusal surface A1 matches the lingual surface of the first occlusion, which can improve the coverage of the first appliance 100 on the first occlusion.

[0527] "First occlusal surface A1" refers to the surface that matches the occlusal surface of the posterior teeth in the posterior tooth region, and the surface that matches the lingual surface of the anterior teeth in the anterior tooth region. The occlusal surface of the posterior teeth and the lingual surface of the anterior teeth are more suitable for installing groove 121.

[0528] There is a gap between the second upper end face 213 of the protrusion 221, which is away from the second occlusal surface A2, and the first occlusal surface A1. There is also a gap between the protrusion 221 and the anterior teeth. The gap can be seen as being achieved by thinning a portion of the protrusion 221 in the corresponding anterior tooth area. The gap setting can avoid interference between the protrusion 221 and the anterior teeth. The gap setting can also create a breathing opening in the anterior tooth area, improving the patient's wearing comfort.

[0529] Optionally, when the first orthodontic appliance 100 and the second orthodontic appliance 200 are in occlusal position, a through hole K is formed between the first appliance body 10 and the second appliance body 200 in the anterior region, connecting the labial and lingual sides. The through hole K can serve as a breathing port, thereby improving the patient's wearing comfort.

[0530] In the anterior region, the first appliance body 10 can be matched with the anterior teeth of the first jaw, and the second appliance body 20 can be matched with the anterior teeth of the second jaw. When the first appliance 100 and the second appliance 200 are in occlusal, a gap is formed between the first appliance body 10 and the second appliance body 20, which is the through hole K connecting the labial and lingual sides.

[0531] Alternatively, a through hole K communicating with the lip and tongue sides may be additionally provided at the first orthodontic appliance body 10 and / or the second orthodontic appliance body 20.

[0532] Optionally, in the posterior region, the second occlusal surface A2 matches the occlusal surface of the second occlusion. The second occlusal surface A2 in the posterior region has an anatomical shape that matches the occlusal surface of the second occlusion, which can improve the coverage of the second appliance 200 on the second occlusion.

[0533] The groove 121 (i.e., the first block 111) in the posterior tooth region is far from the third upper end surface 113 of the first occlusal surface A1, which is completely matched with the second occlusal surface A2, that is, the third upper end surface 113 also has an anatomical structure.

[0534] When the protrusion 221 engages with the first block 111 of the posterior tooth region, the third upper surface 113 of the first block 111 is fully matched with the second occlusal surface A2 of the periphery of the protrusion 221, which can improve the stability of the engagement between the protrusion 221 and the first block 111.

[0535] In other embodiments, when the first orthodontic appliance 100 and the second orthodontic appliance 200 are in an occlusal state, in the posterior tooth region, there is a gap between the third upper end face 113 of the groove 121 (i.e., the first block 111) away from the first occlusal surface A1 and the second occlusal surface A2. The portion of the protrusion 221 away from the second occlusal surface A2 is confined within the first block 111, while the portion of the protrusion 221 connecting to the second occlusal surface A2 is exposed outside the first block 111.

[0536] In other words, when the first orthodontic appliance 100 and the second orthodontic appliance 200 are in occlusion, on the buccal and lingual sides of the posterior teeth, a portion of the protrusion 221 is exposed in the area between the groove 121 and the second occlusal surface A2. When viewed on the buccal and lingual sides, the protrusion 221 can be seen on the side of the first block 111 near the second occlusal surface A2 (above or below the first block 111), and this portion of the protrusion 221 does not extend into the interior of the first block 111.

[0537] At at least one location in the posterior tooth region, the height of the protrusion 221 is greater than the height of the groove 121. The first occlusal surface A1 matches the occlusal surface of the first tooth, and the open bite height of the orthodontic appliance assembly 300 is determined by the height of the protrusion 221. The height of the protrusion 221 can be designed according to the required open bite height of the orthodontic appliance assembly 300.

[0538] The advantages of the height of the protrusion 221 being greater than the height of the groove 121 are: (1) The groove 121 is a recessed structure. This structural characteristic determines that in the hot-pressing film forming process, the film thickness of some or all areas of the groove 121 will be relatively low, affecting the forming quality. Making the height of the groove 121 relatively low can avoid the film thickness of the groove 121 being too low and affecting the forming quality; (2) The higher the height, the more serious the adhesion problem. Making the height of the groove 121 relatively low can reduce the possibility of adhesion; (3) The groove 121 includes a first block 111 and a second block 112 that are separated from each other on the buccal and lingual sides. When the height of the groove 121 is too high, it will affect the strength of the first block 111 and the second block 112. The protrusion 221 is a continuous structure. When the height of the protrusion 221 is relatively high, it will not affect the overall strength of the protrusion 221 too much; (4) The height of the protrusion 221 is higher, so the protrusion 221 can be used to bear the bite. The higher protrusion 221 can accommodate more opening bite height, that is, the opening bite height is determined by the protrusion 221.

[0539] Optionally, the maximum height of the protrusion 221 is greater than the maximum height of the groove 121. In this case, the portion of the protrusion 221 away from the second occlusal surface A2 is confined within the first block 111, while the portion of the protrusion 221 connecting to the second occlusal surface A2 is exposed outside the first block 111. The gap between the first occlusal surface A1 and the second occlusal surface A2 can be defined by the maximum height of the protrusion 221.

[0540] The groove 121 includes a first block 111 and a second block 112 that are disconnected from each other on the buccal and lingual sides. If the height of the groove 121 is too high, it will affect the strength of the first block 111 and the second block 112. The protrusion 221 is a continuous structure. If the height of the protrusion 221 is relatively high, it will not significantly affect the overall strength of the protrusion 221.

[0541] Optionally, when the first orthodontic appliance 100 and the second orthodontic appliance 200 are in occlusion, the gap between the first occlusal surface A1 and the second occlusal surface A2 in the posterior tooth region shall not exceed 7 mm, but is not limited thereto.

[0542] Optionally, the protrusion 221 includes a first segment 214, a second segment 215, and a third segment 216 connected in sequence. The first segment 214 matches the first block 111, the third segment 216 matches the second block 112, and the second segment 215 is exposed on the outside of the groove 121.

[0543] The first segment 214 cooperates with the first block 111 to provide a limiting function, and the third segment 216 cooperates with the second block 112 to provide a limiting function. The second segment 215 does not cooperate with the groove 121, and the fourth upper end face 217 of the second segment 215, which is away from the second occlusal surface A2, may have an anatomical structure. When the protrusion 221 cooperates with the first block 111 in the posterior tooth area, the fourth upper end face 217 of the protrusion 221 is completely matched with the first occlusal surface A1 outside the first block 111, which can further improve the stability of the cooperation between the groove 121 and the protrusion 221.

[0544] The end face of the first segment 214 furthest from the second occlusal surface A2 is the first upper end face 212; the end face of the second segment 215 furthest from the second occlusal surface A2 is the fourth upper end face 217; and the end face of the third segment 216 furthest from the second occlusal surface A2 is the second upper end face 213. The first upper end face 212, the fourth upper end face 217, and the second upper end face 213 are connected sequentially to form the entire upper end face of the protrusion 221. The entire upper end face has an anatomical structure corresponding to the posterior tooth region and matches the first occlusal surface A1 of the posterior tooth region to improve the stability of the fit. The region corresponding to the anterior tooth region has a gap with the anterior tooth region to avoid interfering with the anterior teeth.

[0545] Optionally, the width of the second segment 215 in the buccal-lingual direction is smaller than the width of the first segment 214 in the buccal-lingual direction, that is, a part of the protrusion 221 is recessed, which can prevent the volume of the second chamber S2' formed by the entire protrusion 221 from being too large and affecting the overall strength.

[0546] Optionally, the outer contour of the protrusion 221 is converging along a second direction, which is the direction away from the second occlusal surface A2. The cross-sectional area of ​​the protrusion 221 decreases in the second direction.

[0547] The second distal end face 211 of the protrusion 221 forms an acute angle toward the mesial side with the second occlusal surface A2. The mesial end face, buccal side, and lingual side of the protrusion 221 may also form an acute angle toward the second chamber S2' with the second occlusal surface A2, depending on the actual situation.

[0548] The protrusion 221 is in a gathered shape, which facilitates the demolding and molding of the protrusion 221 and improves the overall strength of the protrusion 221. When the protrusion 221 is in a gathered shape, the opening diameter of the groove 121 can be appropriately increased so that the protrusion 221 can smoothly enter the groove 121.

[0549] The specific forms of the first limiting structure 13 and the second limiting structure 23 will be described below, in conjunction with the aforementioned description of the groove 121 and the protrusion 221 and Figures 84 to 88.

[0550] Optionally, referring to Figure 84, the first limiting structure 13 includes a first protruding ridge 133 connecting at least one of the first enclosure wall 111a and the second enclosure wall 111b, the first protruding ridge 133 protruding toward the interior of the groove 121. The first protruding ridge 133 connects to the end of at least one of the first enclosure wall 111a and the second enclosure wall 111b away from the first engagement surface A1.

[0551] Here, we take the first limiting structure 13, which includes two first protrusions 133, as an example. One of the first protrusions 133 is connected to the end of the first surrounding wall 111a away from the first occlusal surface A1 and extends toward the lingual side. The other first protrusion 133 is connected to the end of the second surrounding wall 111b away from the first occlusal surface A1 and extends toward the buccal side.

[0552] The first protruding ridge 133 is connected to the first enclosure wall 111a to form an "L" shaped structure, and the first protruding ridge 133 is connected to the second enclosure wall 111b to form an "L" shaped structure.

[0553] When the height of the fourth enclosure wall 111d is sufficient, a first protruding ridge 133 can also be formed at the fourth enclosure wall 111d.

[0554] Referring to Figure 85, the second limiting structure 23 includes a second protruding ridge 233 connecting the protrusion 221. The second protruding ridge 233 protrudes toward the cheek and tongue side, and the first protruding ridge 133 and the second protruding ridge 233 cooperate with each other.

[0555] The second protrusion 233 connects to the end of the protrusion 221 away from the second occlusal surface A2. When the first orthodontic appliance 100 and the second orthodontic appliance 200 are in the occlusal state, the first protrusion 133 and the second protrusion 233 are locked together, and the second protrusion 233 is sandwiched between the inner surface of the first protrusion 133 near the first occlusal surface A1 and the first occlusal surface A1.

[0556] Optionally, the outer surface 1331 of the first ridge 133 away from the first occlusal surface A1 may be flush with the third upper end surface 113 of the first block 111, and the outer surface 1331 of the first ridge 133 may also have an anatomical structure that is completely matched with the second occlusal surface A2.

[0557] Here, "level" means roughly at the same height.

[0558] In other embodiments, there may also be a gap between the outer surface 1331 of the first protrusion 133 and the second engagement surface A2, and the outer surface 1331 of the first protrusion 133 may be a plane.

[0559] Optionally, the outer surface 2331 of the second protrusion 233 away from the second occlusal surface A2 may be flush with the first upper end surface 212 of the protrusion 221.

[0560] Here, "level" means roughly at the same height.

[0561] Optionally, referring to Figure 85, the first limiting structure 13 further includes a protrusion 122 connecting the end of the third enclosure wall 112c away from the first occlusal surface A1, with the protrusion 122 protruding towards the distal side. The third enclosure wall 112c and the protrusion 122 are connected to form an "L"-shaped structure.

[0562] Referring to Figures 86 and 87, the second limiting structure 23 also includes a recess 218 located near the mid-surface of the protrusion 221, with the protrusion 122 and the recess 218 cooperating with each other.

[0563] There is a gap between the recess 218 and the second occlusal surface A2. The recess 218 does not extend to the second occlusal surface A2. The recess 218 and the second occlusal surface A2 are spaced apart.

[0564] When the first orthodontic appliance 100 and the second orthodontic appliance 200 are in occlusion, the opening occlusion height of the anterior teeth area is greater than that of the posterior teeth area, raising the position of the concave 218 to accommodate the height of the protrusion 122.

[0565] Optionally, referring to Figures 85 and 86, the orthodontic assembly 300 further includes at least one connecting plate 30, which connects to the labial or lingual side of the third enclosure 112c and the protrusion 122, and / or the connecting plate 30 connects to the labial or lingual side of the recess 218. The connecting plate 30 prevents wrinkles from forming at the third enclosure 112c, the protrusion 122, and / or the recess 218.

[0566] When the connecting plate 30 is connected to the lip or tongue side of the recess 218, the side of the recess 218 away from the connecting plate 30 is open, which makes it easy for the protrusion 122 to enter the recess 218.

[0567] Taking the connecting plate 30 located on the lip side of the third enclosure wall 112c and the protrusion 122 as an example. When there is no connecting plate 30 (i.e., only the "L"-shaped structure formed by the third enclosure wall 112c and the protrusion 122), during the hot-press molding process, due to the natural drooping of the hot-press film, the hot-press films on the lip and tongue sides tend to converge in the middle area of ​​the third enclosure wall 112c, forming wrinkles. When the connecting plate 30 is provided, the hot-press film on the lip side is blocked by the connecting plate 30 during the drooping process, and the hot-press film on the cheek side extends all the way to the connecting plate 30, thus avoiding the formation of wrinkles in the middle area of ​​the third enclosure wall 112c. Therefore, by providing the connecting plate 30 on one side of the third enclosure wall 112c and the protrusion 122, wrinkles can be moved to the area of ​​the connecting plate 30, thus avoiding the formation of wrinkles at the third enclosure wall 112c.

[0568] The connection between the connecting plate 30 and the third enclosure wall 112c is smooth, and the connection between the connecting plate 30 and the protrusion 122 is smooth, which avoids damage to the hot-press film caused by sharp bending, and also avoids stress concentration at the corner.

[0569] The connecting plate 30 is located on the lip side of the third enclosure wall 112c and the protrusion 122, and can also prevent the protrusion 221 from moving toward the lip side.

[0570] The explanation of how to avoid wrinkles when setting the connecting plate 30 at the recess 218 can be found in the above description, and will not be repeated here.

[0571] Optionally, at least one connecting plate 30 includes a first connecting plate 30a and a second connecting plate 30b. The first connecting plate 30a connects to the lip side of the third enclosure wall 112c and the protrusion 122, and the second connecting plate 30b connects to the tongue side of the recess 218. The tongue side of the third enclosure wall 112c and the protrusion 122 are openings, and the lip side of the recess 218 is also an opening.

[0572] Alternatively, the first connecting plate 30a connects to the tongue side of the third enclosure wall 112c and the protrusion 122, and the second connecting plate 30b connects to the lip side of the recess 218. The lip side of the third enclosure wall 112c and the protrusion 122 are openings, and the tongue side of the recess 218 is an opening.

[0573] The cooperation of the first connecting plate 30a and the second connecting plate 30b can further restrict the relative movement of the first orthodontic appliance 100 and the second orthodontic appliance 200 in the lip and tongue direction.

[0574] Referring to Figure 88, when wearing the orthodontic appliance assembly 300, the first orthodontic appliance 100 can be worn on the first jaw, and the second orthodontic appliance 200 can be worn on the second jaw. The protrusion 221 in the posterior tooth area is pre-positioned with the first block 111 of the groove 121, but the protrusion 221 is not fully inserted into the first block 111. Then, the protrusion 221 in the anterior tooth area is fitted with the second block 112, and then the protrusion 221 in the posterior tooth area is fitted with the first block 111.

[0575] In summary, the third embodiment connects the first orthodontic appliance 100 and the second orthodontic appliance 200 through the groove 121 and the protrusion 221. The groove 121 includes a first block 111 and a second block 112 that are disconnected from each other on the cheek side and the tongue side. The groove 121 is not a completely continuous structure, which facilitates the protrusion 221 to enter the groove 121 and achieve positioning.

[0576] In the third embodiment, the groove 121 and the protrusion 221 are located on the first occlusal surface A1 and the second occlusal surface A2, respectively. When the patient wears the orthodontic appliance assembly 300, the groove 121 and the protrusion 221 will not interfere with the lip and cheek muscles, which can greatly improve the patient's experience.

[0577] It should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This way of describing the specification is only for clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

[0578] The detailed descriptions listed above are merely specific descriptions of feasible implementation methods of this application and are not intended to limit the scope of protection of this application. All equivalent implementation methods or modifications made without departing from the spirit of the art of this application should be included within the scope of protection of this application.

Claims

1. An orthodontic appliance assembly, characterized in that, It includes a first orthodontic appliance corresponding to the first dental arch and a second orthodontic appliance corresponding to the second dental arch. The first orthodontic appliance includes a first orthodontic appliance body and a first retention part located on the first orthodontic appliance body. The second orthodontic appliance includes a second orthodontic appliance body and a second retention part located on the second orthodontic appliance body. The first retention part includes a first retention part body connecting the first orthodontic appliance body and a first limiting structure connecting the first retention part body. The second retention part includes a second retention part body connecting the second orthodontic appliance body and a second limiting structure connecting the second retention part body. When the first orthodontic appliance and the second orthodontic appliance are in an occlusal state, the first retention part body and the second retention part body cooperate with each other to limit the relative movement of the first orthodontic appliance and the second orthodontic appliance in the horizontal plane, and the first limiting structure and the second limiting structure cooperate with each other to limit the relative movement of the first orthodontic appliance and the second orthodontic appliance in the vertical direction.

2. The orthodontic appliance assembly according to claim 1, characterized in that, The first retention part body includes a groove, and the second retention part body includes a protrusion. When the first orthodontic appliance and the second orthodontic appliance are in an occlusal state, the protrusion is limited in the groove to limit the relative movement of the first orthodontic appliance and the second orthodontic appliance in the horizontal plane.

3. The orthodontic appliance assembly according to claim 2, characterized in that, The groove includes a bottom wall and a surrounding wall provided around the first periphery of the bottom wall. The bottom wall and the surrounding wall enclose a receiving cavity for receiving the protrusion.

4. The orthodontic appliance assembly according to claim 3, characterized in that, The surrounding wall includes at least one of a first surrounding wall group, a second surrounding wall group, and a third surrounding wall group. Multiple surrounding walls in the first surrounding wall group cooperate with each other to limit the relative movement of the first orthodontic appliance and the second orthodontic appliance in a first direction. Multiple surrounding walls in the second surrounding wall group cooperate with each other to limit the relative movement of the first orthodontic appliance and the second orthodontic appliance in a second direction. Multiple surrounding walls in the third surrounding wall group cooperate with each other to limit the relative rotation of the first orthodontic appliance and the second orthodontic appliance in the dental arch direction. The first direction and the second direction are both located in the horizontal plane, and the included angle between the first direction and the second direction is an acute angle or a right angle.

5. The orthodontic appliance assembly according to claim 4, characterized in that, Multiple surrounding walls in the first surrounding wall group, the second surrounding wall group, and the third surrounding wall group are spaced apart from each other, or at least two of the multiple surrounding walls in the first surrounding wall group, the second surrounding wall group, and the third surrounding wall group are connected.

6. The orthodontic appliance assembly according to claim 3, characterized in that, The surrounding wall connects a partial area of the first periphery.

7. The orthodontic appliance assembly according to claim 6, characterized in that, The surrounding wall includes a first surrounding wall. A junction area is formed between the first surrounding wall and the bottom wall. The junction area is in the shape of "one", "L", "匚", or "冂".

8. The orthodontic appliance assembly according to claim 6, characterized in that, The surrounding wall includes a first surrounding wall. In the dental arch direction, the bottom wall includes a first side and a second side arranged oppositely. The first surrounding wall is located on at least one of the first side, the second side, the buccal side, and the lingual side of the bottom wall.

9. The orthodontic appliance assembly according to claim 8, characterized in that, The first surrounding wall is a continuous structure extending along the circumferential direction of the first periphery. The first surrounding wall extends from the first side through the buccal side to the second side, or the first surrounding wall extends from the lingual side through the buccal side to the first side or the second side, or the first surrounding wall extends from the lingual side through the buccal side to the lingual side, or the first surrounding wall extends from the first side through the lingual side to the second side, or the first surrounding wall extends from the buccal side through the lingual side to the first side or the second side, or the first surrounding wall extends from the buccal side through the lingual side to the buccal side.

10. The orthodontic appliance assembly according to claim 9, characterized in that, The surrounding wall further includes a second surrounding wall. The second surrounding wall is spaced from the first surrounding wall and is located on the lingual side or the buccal side of the bottom wall.

11. The orthodontic appliance assembly according to claim 6, characterized in that, The first periphery is formed by enclosing four edges connected in sequence. The surrounding wall includes a first surrounding wall. The first surrounding wall connects at least a part of one edge, or the first surrounding wall continuously connects at least a part of two adjacent edges, or the first surrounding wall continuously connects at least a part of three edges, or the first surrounding wall continuously connects a part of four edges.

12. The orthodontic appliance assembly according to claim 11, characterized in that, The four edges include a first edge located on one of the buccal side or the lingual side of the bottom wall, a third edge located on the other of the buccal side or the lingual side of the bottom wall, a second edge and a fourth edge respectively located on the first side and the second side of the bottom wall. The surrounding wall continuously connects the first edge, the second edge, the third edge and the fourth edge. The first surrounding wall includes a starting end and a terminating end. The starting end is located on the first edge, and the terminating end is located on the first edge or the fourth edge.

13. The orthodontic appliance assembly according to claim 12, characterized in that, The surrounding wall further includes a second surrounding wall. The second surrounding wall is spaced from the first surrounding wall and is located on the first edge.

14. The orthodontic appliance assembly according to claim 12, characterized in that, The length of the first edge is greater than the length of the second edge, and the length of the first edge is greater than the length of the fourth edge.

15. The orthodontic appliance assembly according to claim 3, characterized in that, The surrounding wall connects all regions of the first periphery.

16. The orthodontic appliance assembly according to claim 15, characterized in that, A junction area is formed between the surrounding wall and the bottom wall. The junction area is in the shape of a "mouth".

17. The orthodontic appliance assembly according to claim 15, characterized in that, In the circumferential direction of the first periphery, the surrounding wall includes a first region and a second region. The deformability of the first region is less than that of the second region.

18. The orthodontic appliance assembly according to claim 17, characterized in that, In the vertical direction, the first region has a first average height, and the second region has a second average height. The first average height is greater than the second average height; or the second region includes a second region body and at least one slot penetrating the second region body in the thickness direction of the surrounding wall. The second region body includes a top surface away from the first occlusal surface of the first dental arch, and the slot penetrates the top surface.

19. The orthodontic appliance assembly according to claim 17, characterized in that, The first region and the second region enclose the wall. In the direction of the dental arch, the bottom wall includes a first side and a second side disposed opposite to each other. The first region extends from the first side through the buccal side to the second side, or the first region extends from the lingual side through the buccal side to the first side or the second side, or the first region extends from the lingual side through the buccal side to the lingual side, or the first region extends from the first side through the lingual side to the second side, or the first region extends from the buccal side through the lingual side to the first side or the second side, or the first region extends from the buccal side through the lingual side to the buccal side.

20. The orthodontic appliance assembly according to claim 17, characterized in that, The first region and the second region enclose the wall. In the direction of the dental arch, the bottom wall includes a first side and a second side disposed opposite to each other. The first periphery is formed by four edges connected in sequence. The four edges include a first edge located on one of the buccal or lingual sides of the bottom wall, a third edge located on the other of the buccal or lingual sides of the bottom wall, a second edge located on the mesial side and the distal side of the bottom wall, and a fourth edge located on the mesial side and the distal side, respectively. The second region connects to the first edge or the third edge.

21. The orthodontic appliance assembly according to claim 20, characterized in that, The length of the first edge is greater than the length of the second edge, and the length of the first edge is greater than the length of the fourth edge.

22. The orthodontic appliance assembly according to claim 3, characterized in that, The inner contour of the groove matches the outer contour of the protrusion.

23. The orthodontic appliance assembly according to any one of claims 3-22, characterized in that, The first limiting structure is connected to the inner side of the enclosure, and the second limiting structure is connected to the outer side of the protrusion. One of the first limiting structure and the second limiting structure is a notch, and the other is a convex ridge.

24. The orthodontic appliance assembly according to claim 23, characterized in that, The first limiting structure is a notch, which is formed by a first protrusion and a second protrusion protruding toward the inner side of the enclosure wall facing the receiving cavity; or, the notch is formed by a first protrusion protruding toward the inner side of the enclosure wall facing the receiving cavity and the bottom wall.

25. The orthodontic appliance assembly according to claim 24, characterized in that, The enclosure includes a first end face away from the bottom wall, and the end face of the first protrusion away from the bottom wall is connected to the first end face.

26. The orthodontic appliance assembly according to claim 23, characterized in that, The second limiting structure is a convex ridge, the convex ridge including a top that is away from the second orthodontic body and connected to the outer side of the convex ridge, and the convex ridge is connected to the top.

27. The orthodontic appliance assembly according to claim 23, characterized in that, The first limiting structure is a continuous structure that connects the entire enclosure along the circumferential direction of the first perimeter; or, the first fixing part includes two first limiting structures arranged at intervals, with the two first limiting structures facing each other.

28. The orthodontic appliance assembly according to claim 1, characterized in that, The first orthodontic appliance body forms a first cavity to accommodate a first jaw, and the first retention portion forms a first chamber communicating with the first cavity, the first retention portion being integrally formed with the first orthodontic appliance body; the second orthodontic appliance body forms a second cavity to accommodate a second jaw, and the second retention portion forms a second chamber communicating with the second cavity, the second retention portion being integrally formed with the second orthodontic appliance body.

29. The orthodontic appliance assembly according to claim 28, characterized in that, The first orthodontic appliance includes a first filling portion located within the first cavity, and the second orthodontic appliance includes a second filling portion located within the second cavity.

30. The orthodontic appliance assembly according to any one of claims 1-29, characterized in that, The first retention portion is located on the first occlusal surface of the first orthodontic appliance body, and the first retention portion body is connected to the first occlusal surface; the second retention portion is located on the second occlusal surface of the second orthodontic appliance body, and the second retention portion body is connected to the second occlusal surface.

31. The orthodontic appliance assembly according to claim 30, characterized in that, The first retention part body includes a groove, the groove includes a bottom wall disposed on a first occlusal surface corresponding to the first tooth jaw, the bottom wall includes a first side and a second side disposed opposite to each other, the first side being the mesial side and the second side being the distal side.

32. The orthodontic appliance assembly according to claim 30, characterized in that, The first retention part body includes a groove, and the second retention part body includes a protrusion that cooperates with the groove. The groove includes a bottom wall corresponding to the first occlusal surface of the first tooth. The bottom wall is in close contact with the first occlusal surface of the first tooth, or there is a gap between the bottom wall and the first occlusal surface of the first tooth. The protrusion includes a top that is away from the second occlusal surface of the second tooth. The shape of the bottom wall matches the shape of the top. When the first orthodontic appliance and the second orthodontic appliance are in an occlusal state, the bottom wall and the top abut against each other.

33. The orthodontic appliance assembly according to claim 30, characterized in that, The first retention part body includes a groove, the groove includes a bottom wall and a surrounding wall provided around the first periphery of the bottom wall, the surrounding wall includes a first end face away from the first occlusal surface of the first tooth, at least a portion of the shape of the first end face matches the shape of the second occlusal surface, and when the first orthodontic appliance and the second orthodontic appliance are in an occlusal state, at least a portion of the first end face abuts against the second occlusal surface.

34. The orthodontic appliance assembly according to claim 30, characterized in that, The first retention part body includes a groove, the groove including a bottom wall having a first periphery, the first periphery including a first edge located on one of the buccal or lingual sides of the bottom wall and a third edge located on the other of the buccal or lingual sides of the bottom wall, the contour line of the first occlusal surface including a first contour line adjacent to the first edge and a third contour line adjacent to the third edge, the shape of the first contour line matching the shape of the first edge, and the shape of the third contour line matching the shape of the third edge.

35. The orthodontic appliance assembly according to claim 30, characterized in that, The first retention part body includes a groove, the second retention part body includes a protrusion that cooperates with the groove, the first retention part body also includes an additional protrusion that connects to the groove, and the second retention part body also includes an additional groove that connects to the protrusion. When the first orthodontic appliance and the second orthodontic appliance are in an occlusal state, the additional protrusion is confined to the additional groove and restricts the relative movement of the first orthodontic appliance and the second orthodontic appliance in the horizontal plane.

36. The orthodontic appliance assembly according to claim 30, characterized in that, The first retention part body includes a groove, and the second retention part body includes a protrusion that cooperates with the groove. The groove protrudes out of the first occlusal surface in a first direction, and the first direction forms a first angle with the first occlusal plane of the first tooth. The protrusion protrudes out of the second occlusal surface in a second direction, and the second direction forms a second angle with the second occlusal plane of the second tooth. The first angle is equal to the second angle.

37. The orthodontic appliance assembly according to claim 30, characterized in that, The first retention part body includes a groove, the second retention part body includes a protrusion that cooperates with the groove, and the second retention part body also includes an extension connecting the protrusion and the second occlusal surface. When the first orthodontic appliance and the second orthodontic appliance are in an occlusal state, the protrusion is limited to the groove, and the extension is located outside the groove.

38. The orthodontic appliance assembly according to claim 30, characterized in that, The first retention portion is located in the posterior tooth region of the first orthodontic appliance body, and the number of teeth covered by one first retention portion does not exceed three.

39. The orthodontic appliance assembly according to claim 30, characterized in that, The orthodontic appliance assembly includes a first hemi-maxillary region and a second hemi-maxillary region located on both sides of the dental midline. The orthodontic appliance assembly includes at least two sets of retention parts, each set of retention parts including a first retention part and a second retention part. The two sets of retention parts include a first retention part group and a second retention part group. The first retention part group is located in the posterior tooth region of the first hemi-maxillary region, and the second retention part group is located in the posterior tooth region of the second hemi-maxillary region.

40. The orthodontic appliance assembly according to claim 39, characterized in that, The orthodontic appliance assembly further includes at least one additional positioning group, which includes a first positioning part located in the anterior tooth region of the first orthodontic appliance body and a second positioning part located in the anterior tooth region of the second orthodontic appliance body. When the first orthodontic appliance and the second orthodontic appliance are in an occlusal state, the first positioning part and the second positioning part limit each other.

41. The orthodontic appliance assembly according to claim 40, characterized in that, The first positioning part is located on the first lingual surface of the first orthodontic appliance body, and the second positioning part is located on the second lingual surface of the second orthodontic appliance body. The first positioning part includes a first positioning part body connected to the first lingual surface and a first stop structure connected to the first positioning part body. The second positioning part includes a second positioning part body connected to the second lingual surface and a second stop structure connected to the second positioning part body. When the first orthodontic appliance and the second orthodontic appliance are in an occlusal state, the first positioning part body and the second positioning part body cooperate with each other to restrict the relative movement of the first orthodontic appliance and the second orthodontic appliance in the horizontal plane, and the first stop structure and the second stop structure cooperate with each other to restrict the relative movement of the first orthodontic appliance and the second orthodontic appliance in the vertical direction.

42. The orthodontic appliance assembly according to claim 41, characterized in that, The first positioning part body includes a recess, and the second positioning part body includes a protrusion. When the first orthodontic appliance and the second orthodontic appliance are in an occlusal state, the protrusion is confined within the recess to restrict the relative movement of the first orthodontic appliance and the second orthodontic appliance in the horizontal plane.

43. The orthodontic appliance assembly according to claim 42, characterized in that, The first stop structure is connected to the inner side of the recess, and the second stop structure is connected to the outer side of the protrusion. One of the first stop structure and the second stop structure is a recess, and the other is a protrusion.

44. The orthodontic appliance assembly according to any one of claims 1-29, characterized in that, The first retention part is located on the first lingual surface of the anterior tooth region of the first orthodontic appliance body, and the first retention part body is connected to the first lingual surface; the second retention part is located on the second lingual surface of the anterior tooth region of the second orthodontic appliance body, and the second retention part body is connected to the second lingual surface.

45. The orthodontic appliance assembly according to claim 44, characterized in that, The first retaining part body includes a groove, the groove includes a bottom wall, the bottom wall is connected to the first tongue surface, and the bottom wall is parallel to the horizontal plane.

46. ​​An orthodontic appliance assembly, characterized in that, It includes a first orthodontic appliance body that accommodates a first jaw, a second orthodontic appliance body that accommodates a second jaw, and multiple retention groups connecting the first and second orthodontic appliance bodies. The multiple retention groups located in different regions cooperate with each other to achieve full movement restriction and full rotation restriction. The retention group in a certain region achieves partial movement restriction and / or partial rotation restriction. Movement restriction includes movement restriction of the first and second orthodontic appliance bodies in a first plane, and rotation restriction includes rotation restriction of the first and second orthodontic appliance bodies in the direction of the dental arch.

47. The orthodontic appliance assembly according to claim 46, characterized in that, The different regions include the first posterior tooth region, the second posterior tooth region, the first anterior tooth region, and the second anterior tooth region. The orthodontic appliance assembly includes the first hemi-maxillary region and the second hemi-maxillary region located on both sides of the dental midline. The first posterior tooth region and the first anterior tooth region are located in the first hemi-maxillary region, and the second posterior tooth region and the second anterior tooth region are located in the second hemi-maxillary region.

48. The orthodontic appliance assembly according to claim 47, characterized in that, The two retention groups are located in the first posterior region and the first anterior region, respectively, and the two retention groups are connected to each other or spaced apart; or, the two retention groups are located in the first anterior region and the second anterior region, respectively, and the two retention groups are connected to each other or spaced apart.

49. The orthodontic appliance assembly according to claim 46, characterized in that, At least two of the multiple retention groups are connected to each other, or at least two of the multiple retention groups are spaced apart from each other.

50. The orthodontic appliance assembly according to claim 46, characterized in that, The movement limit includes a first movement limit and a second movement limit. The first movement limit is the movement limit of the first orthodontic appliance body and the second orthodontic appliance body in a first direction. The second movement limit is the movement limit of the first orthodontic appliance body and the second orthodontic appliance body in a second direction. Both the first direction and the second direction are located in a first plane, and the included angle between the first direction and the second direction is an acute angle or a right angle.

51. The orthodontic appliance assembly according to claim 46, characterized in that, The first plane is a horizontal plane.

52. The orthodontic appliance assembly according to claim 46, characterized in that, Multiple retention groups connect the occlusal or lingual surfaces of the orthodontic appliance components.

53. The orthodontic appliance assembly according to claim 46, characterized in that, Each retention group includes a protrusion and a surrounding wall that mutually limit each other on a first plane. One of the protrusions and the surrounding wall is connected to the first orthodontic appliance body, and the other is connected to the second orthodontic appliance body. The surrounding walls of the multiple retention groups include a first surrounding wall group, a second surrounding wall group, and a third surrounding wall group. The surrounding walls in the first surrounding wall group cooperate to restrict the relative movement of the first orthodontic appliance body and the second orthodontic appliance body in a first direction. The surrounding walls in the second surrounding wall group cooperate to restrict the relative movement of the first orthodontic appliance body and the second orthodontic appliance body in a second direction. The surrounding walls in the third surrounding wall group cooperate to restrict the relative rotation of the first orthodontic appliance body and the second orthodontic appliance body in the dental arch direction. Both the first direction and the second direction are located on the first plane, and the angle between the first direction and the second direction is an acute angle or a right angle.

54. The orthodontic appliance assembly according to claim 53, characterized in that, The first enclosure group includes a first enclosure and a third enclosure which are arranged at intervals. The first enclosure and the third enclosure cooperate with each other to limit the relative movement of the first orthodontic appliance body and the second orthodontic appliance body in the first direction. The second enclosure group includes a second enclosure and a fourth enclosure which are arranged at intervals. The second enclosure and the fourth enclosure cooperate with each other to limit the relative movement of the first orthodontic appliance body and the second orthodontic appliance body in the second direction. The third enclosure group includes a fifth enclosure and a sixth enclosure which are arranged at intervals. The fifth enclosure and the sixth enclosure cooperate with each other to limit the relative rotation of the first orthodontic appliance body and the second orthodontic appliance body in the dental arch direction.

55. The orthodontic appliance assembly according to claim 54, characterized in that, The first enclosure, the second enclosure, the third enclosure and the fourth enclosure are four different enclosures. The fifth enclosure coincides with one of the first enclosure, the second enclosure, the third enclosure and the fourth enclosure, and / or the sixth enclosure coincides with another one of the first enclosure, the second enclosure, the third enclosure and the fourth enclosure.

56. The orthodontic appliance assembly according to claim 54, characterized in that, The first enclosure, the second enclosure, the third enclosure, the fourth enclosure, the fifth enclosure and the sixth enclosure are located in different regions.

57. The orthodontic appliance assembly according to claim 54, characterized in that, The multiple retention groups include at least one first retention group, at least one second retention group, at least one third retention group and at least one fourth retention group. The multiple protrusions include a first protrusion located in the first retention group, a second protrusion located in the second retention group, a third protrusion located in the third retention group and a fourth protrusion located in the fourth retention group. The multiple enclosures include a first enclosure located in the first retention group, a second enclosure located in the second retention group, a third enclosure located in the third retention group and a fourth enclosure located in the fourth retention group. Among them, the first enclosure is located on the first side of the first protrusion, the second enclosure is located on the second side of the second protrusion, the third enclosure is located on the third side of the third protrusion, the fourth enclosure is located on the fourth side of the fourth protrusion. The first direction is the direction between the first side and the third side, and the second direction is the direction between the second side and the fourth side.

58. The orthodontic appliance assembly according to claim 54, characterized in that, The multiple retention groups include at least one fifth retention group and at least one sixth retention group. The multiple protrusions include a fifth protrusion located in the fifth retention group and a sixth protrusion located in the sixth retention group. The multiple enclosures include a fifth enclosure located in the fifth retention group and a sixth enclosure located in the sixth retention group. Among them, the fifth enclosure restricts the clockwise rotation of the fifth protrusion along the dental arch, and the sixth enclosure restricts the counterclockwise rotation of the sixth protrusion along the dental arch.

59. The orthodontic appliance assembly according to claim 57, characterized in that, In a cross-section parallel to the horizontal plane, the first enclosure, the second enclosure, the third enclosure and the fourth enclosure are all in the shape of "一".

60. The orthodontic appliance assembly according to claim 57, characterized in that, The first enclosure is connected to the second enclosure, and the first protrusion and the second protrusion are integrally connected.

61. The orthodontic appliance assembly according to claim 60, characterized in that, In a cross-section parallel to the horizontal plane, the first enclosure and the second enclosure are in the shape of "L".

62. The orthodontic appliance assembly according to claim 57, characterized in that, The first enclosure, the second enclosure and the third enclosure are connected in sequence, and the first protrusion, the second protrusion and the third protrusion are integrally connected.

63. The orthodontic appliance assembly according to claim 62, characterized in that, The cross-section of the first surrounding wall, the second surrounding wall, and the third surrounding wall parallel to the horizontal plane is in an "L" shape.

64. The orthodontic appliance assembly according to claim 57, characterized in that, The first surrounding wall, the second surrounding wall, and the fourth surrounding wall are connected in sequence, and the first protrusion, the second protrusion, and the fourth protrusion are integrated.

65. The orthodontic appliance assembly according to claim 64, characterized in that, The cross-section of the first surrounding wall, the second surrounding wall, and the fourth surrounding wall parallel to the horizontal plane is in an "L" shape.

66. The orthodontic appliance assembly according to claim 53, characterized in that, The protrusion is integrally formed with the first orthodontic appliance body, and the surrounding wall is integrally formed with the second orthodontic appliance body; or the protrusion is integrally formed with the second orthodontic appliance body, and the surrounding wall is integrally formed with the first orthodontic appliance body.

67. The orthodontic appliance assembly according to claim 53, characterized in that, The orthodontic appliance assembly further includes a first limiting structure connecting the surrounding wall and a second limiting structure connecting the protrusion. When the first orthodontic appliance body and the second orthodontic appliance body are in an occlusal state, the first limiting structure and the second limiting structure cooperate with each other to limit the relative movement of the first orthodontic appliance body and the second orthodontic appliance body in the vertical direction.

68. The orthodontic appliance assembly according to claim 67, characterized in that, The first limiting structure and the second limiting structure are located in at least one of the multiple retention groups.

69. The orthodontic appliance assembly according to claim 67, characterized in that, The first limiting structure and the second limiting structure are located in the first retention group and the third retention group, or the first limiting structure and the second limiting structure are located in the second retention group and the fourth retention group.

70. The orthodontic appliance assembly according to claim 53, characterized in that, The protrusion connects to the first occlusal surface of the first orthodontic appliance body, and the surrounding wall connects to the second occlusal surface of the second orthodontic appliance body; or the protrusion connects to the second occlusal surface of the second orthodontic appliance body, and the surrounding wall connects to the first occlusal surface of the first orthodontic appliance body.

71. The orthodontic appliance assembly according to claim 53, characterized in that, The protrusion connects to the first lingual surface of the first orthodontic appliance body, and the surrounding wall connects to the second lingual surface of the second orthodontic appliance body; or the protrusion connects to the second lingual surface of the second orthodontic appliance body, and the surrounding wall connects to the first lingual surface of the first orthodontic appliance body.

72. An orthodontic appliance assembly, characterized in that, It includes a first orthodontic appliance corresponding to the first dental arch and a second orthodontic appliance corresponding to the second dental arch. The first orthodontic appliance includes a first orthodontic appliance body and a groove protruding from the first occlusal surface of the first orthodontic appliance body. The second orthodontic appliance includes a second orthodontic appliance body and a protrusion protruding from the second occlusal surface of the second orthodontic appliance body. Both the groove and the protrusion extend from the posterior tooth area to the anterior tooth area on one side of the dental midline. The groove is formed by combining a first block and a second block. The first block and the second block are both disconnected on the buccal side and the lingual side. The protrusion is a continuous structure. When the first orthodontic appliance and the second orthodontic appliance are in an occlusal state, the groove and the protrusion cooperate with each other to limit the relative movement of the first orthodontic appliance and the second orthodontic appliance in at least some directions in the horizontal plane.

73. The orthodontic appliance assembly according to claim 72, characterized in that, The first block is entirely located in the posterior tooth area, and the second block is entirely located in the anterior tooth area.

74. The orthodontic appliance assembly according to claim 72, characterized in that, The first block includes a first surrounding wall and a second surrounding wall respectively located on the buccal side and the lingual side of the first occlusal surface. The second block is located on the mesial side of the first block, and the second block includes a third surrounding wall extending along the labiolingual direction.

75. The orthodontic appliance assembly according to claim 74, characterized in that, The lengths of the first surrounding wall and the second surrounding wall in the mesiodistal direction are approximately equal.

76. The orthodontic appliance assembly according to claim 74, characterized in that, The first block further includes a fourth wall connecting the first wall and the second wall, the fourth wall extending in the buccal-lingual direction and located on the distal side of the first wall and the second wall.

77. The orthodontic appliance assembly according to claim 76, characterized in that, The fourth wall smoothly transitions to the cheek side of the first wall, and the fourth wall smoothly transitions to the tongue side of the second wall.

78. The orthodontic appliance assembly according to claim 76, characterized in that, The first block includes a sloping section on the far-middle side, the sloping section extending to the fourth enclosure wall, the sloping section increasing in elevation along a first direction, the first direction being the direction from far-middle to near-middle.

79. The orthodontic appliance assembly according to claim 74, characterized in that, The proximal end face of the third enclosure has an acute angle toward the distal side between it and the first occlusal face.

80. The orthodontic appliance assembly according to claim 72, characterized in that, In the posterior tooth region, the first occlusal surface matches the occlusal surface of the first jaw, and the first upper surface of the protrusion, which is away from the second occlusal surface, completely matches the first occlusal surface.

81. The orthodontic appliance assembly according to claim 72, characterized in that, In the anterior region, the first occlusal surface matches the lingual surface of the first jaw, and the second upper end face of the protrusion, which is away from the second occlusal surface, has a gap with the first occlusal surface.

82. The orthodontic appliance assembly according to claim 72, characterized in that, In the posterior region, the second occlusal surface matches the occlusal surface of the second jaw, and the third upper end face of the groove, which is away from the first occlusal surface, completely matches the second occlusal surface.

83. The orthodontic appliance assembly according to claim 72, characterized in that, The protrusion includes a first segment, a second segment, and a third segment connected in sequence. The first segment matches the first block, the third segment matches the second block, the second segment is exposed outside the groove, and the width of the second segment in the buccal-lingual direction is smaller than the width of the first segment in the buccal-lingual direction.

84. The orthodontic appliance assembly according to claim 72, characterized in that, The outer contour of the protrusion is converging along a second direction, which is the direction away from the second occlusal surface.

85. The orthodontic appliance assembly according to claim 72, characterized in that, The second block corresponds to at least one of the settings for teeth 2-4.

86. The orthodontic appliance assembly according to claim 72, characterized in that, At at least one location in the posterior tooth region, the height of the protrusion is greater than the height of the groove.

87. The orthodontic appliance assembly according to claim 72, characterized in that, When the first orthodontic appliance and the second orthodontic appliance are in occlusion, on the buccal and lingual sides of the posterior teeth, a portion of the protrusion is exposed in the area between the groove and the second occlusal surface.

88. The orthodontic appliance assembly according to claim 72, characterized in that, When the first orthodontic appliance and the second orthodontic appliance are in occlusion, in the posterior tooth region, there is a gap between the third upper end face of the groove away from the first occlusal surface and the second occlusal surface.

89. The orthodontic appliance assembly according to claim 72, characterized in that, In the posterior region, the first occlusal surface matches the occlusal surface of the first jaw, and the opening occlusal height of the orthodontic appliance assembly is determined by the height of the protrusion.

90. The orthodontic appliance assembly according to claim 72, characterized in that, When the first orthodontic appliance and the second orthodontic appliance are in occlusal position, the gap between the first occlusal surface and the second occlusal surface in the posterior tooth region is no greater than 7 mm.

91. The orthodontic appliance assembly according to claim 72, characterized in that, When the first orthodontic appliance and the second orthodontic appliance are in occlusion, a through hole is formed between the body of the first orthodontic appliance and the body of the second orthodontic appliance in the anterior teeth area, connecting the labial and lingual sides.

92. The orthodontic appliance assembly according to claim 72, characterized in that, The groove is integrally formed with the first orthodontic appliance body, and the first orthodontic appliance body forms a first cavity to accommodate the first jaw, and the groove forms a first cavity that connects to the first cavity; the protrusion is integrally formed with the second orthodontic appliance body, and the second orthodontic appliance body forms a second cavity to accommodate the second jaw, and the protrusion forms a second cavity that connects to the second cavity.

93. The orthodontic appliance assembly according to claim 72, characterized in that, The first orthodontic appliance further includes a first limiting structure connecting the groove, and the second orthodontic appliance further includes a second limiting structure connecting the protrusion. When the first orthodontic appliance and the second orthodontic appliance are in an occlusal state, the first limiting structure and the second limiting structure cooperate with each other to restrict the first orthodontic appliance and the second orthodontic appliance from moving relative to each other in the vertical direction.

94. The orthodontic appliance assembly according to claim 93, characterized in that, The first block includes a first perimeter wall and a second perimeter wall located on the buccal and lingual sides of the first occlusal surface, respectively. The first limiting structure includes a first protruding ridge connecting at least one of the first perimeter wall and the second perimeter wall. The first protruding ridge protrudes toward the interior of the groove. The second limiting structure includes a second protruding ridge connecting the protrusion. The second protruding ridge protrudes toward the buccal and lingual sides. The first protruding ridge and the second protruding ridge cooperate with each other.

95. The orthodontic appliance assembly according to claim 94, characterized in that, The first convex ridge connects to at least one of the first enclosure wall and the second enclosure wall at an end away from the first occlusal surface, and the second convex ridge connects to the end of the protrusion away from the second occlusal surface. When the first orthodontic appliance and the second orthodontic appliance are in an occlusal state, the second convex ridge is sandwiched between the inner surface of the first convex ridge near the first occlusal surface and the first occlusal surface.

96. The orthodontic appliance assembly according to claim 93, characterized in that, The second block includes a third perimeter extending along the buccal-lingual direction, the first limiting structure includes a protrusion connecting one end of the third perimeter away from the first occlusal surface, the protrusion protruding toward the distal side, and the second limiting structure includes a recess located on the proximal surface of the protrusion, the protrusion and the recess cooperating with each other.

97. The orthodontic appliance assembly according to claim 96, characterized in that, There is a gap between the recess and the second occlusal surface.

98. The orthodontic appliance assembly according to claim 96, characterized in that, The orthodontic assembly further includes at least one connecting plate that connects the third enclosure and the labial or lingual side of the protrusion, and / or the connecting plate connects the labial or lingual side of the recess.

99. The orthodontic appliance assembly according to claim 98, characterized in that, When the connecting plate connects to the lip or tongue side of the recess, the side of the recess away from the connecting plate is an opening.

100. The orthodontic appliance assembly according to claim 98, characterized in that, At least one connecting plate includes a first connecting plate and a second connecting plate, wherein the first connecting plate connects the third enclosure wall and the lip side of the protrusion, and the second connecting plate connects the tongue side of the recess; or, the first connecting plate connects the third enclosure wall and the tongue side of the protrusion, and the second connecting plate connects the lip side of the recess.

101. The orthodontic appliance assembly according to claim 93, characterized in that, The groove is integrally formed with the first limiting structure, and the first cavity formed by the groove is interconnected with the first chamber formed by the first limiting structure; the protrusion is integrally formed with the second limiting structure, and the second cavity formed by the protrusion is interconnected with the second chamber formed by the second limiting structure.

102. The orthodontic appliance assembly according to any one of claims 72-101, characterized in that, The orthodontic appliance assembly includes a first hemi-maxillary region and a second hemi-maxillary region located on both sides of the dental midline, and two sets of retention groups located in the first hemi-maxillary region and the second hemi-maxillary region respectively. Each retention group includes the groove and the protrusion that cooperate with each other, and the two sets of retention groups are symmetrically arranged with respect to the dental midline.

103. The orthodontic appliance assembly according to any one of claims 72-101, characterized in that, The first orthodontic appliance is integrally formed by a hot-press molding process, and the second orthodontic appliance is integrally formed by a hot-press molding process.

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