Appliance assembly

Abstract

The application discloses a kind of appliance assemblies, comprising first appliance and second appliance, first appliance includes first appliance body and first retaining portion in first appliance body, second appliance includes second appliance body and second retaining portion in second appliance body, first retaining portion includes first retaining portion body connected with first appliance body and first limiting structure, second retaining portion includes second retaining portion body connected with second appliance body and second limiting structure, when first appliance and second appliance are in occlusion, first retaining portion body and second retaining portion body cooperate to limit the relative movement of first appliance and second appliance in horizontal plane, first limiting structure and second limiting structure cooperate to limit the relative movement of first appliance and second appliance in vertical direction.The application can improve the stability of the connection between first appliance and second appliance.

Description

Technical Field

[0001] This invention relates to the field of orthodontic technology, and more particularly to an orthodontic appliance assembly. Background Technology

[0002] 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

[0003] The purpose of this invention is to provide an orthodontic appliance assembly that helps improve the connection stability between two orthodontic appliances.

[0004] This invention 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.

[0005] Compared with the prior art, the beneficial effects of the present invention are as follows: The present invention 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 and second limiting structures, 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 simultaneously. This embodiment achieves 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.

[0006] In addition, the first retention part and the second retention part of the present invention are located on the first occlusal surface and the second occlusal surface, respectively. When the patient wears the orthodontic appliance assembly, the first retention part and the second retention part will not interfere with each other with the lip and cheek muscles, which can greatly improve the patient experience. Attached Figure Description

[0007] Figure 1 and Figure 2 This is a schematic diagram of the orthodontic appliance assembly of a first specific embodiment of the first embodiment of the present invention; Figure 3 This is a cross-sectional view of the orthodontic appliance assembly of a first specific embodiment of the first embodiment of the present invention; Figure 4 This is a partial structural schematic diagram of the first orthodontic appliance in a first specific embodiment of the first embodiment of the present invention; Figure 5 This is a partial structural schematic diagram of the second orthodontic appliance in a first specific embodiment of the first embodiment of the present invention; Figure 6 yes Figure 3 Schematic diagram of the cross section of AA; Figures 7 to 12 This is a schematic diagram of the partial structure of the orthodontic appliance component in the first implementation; Figures 13 to 15 This is a schematic diagram of the structure of a portion of the orthodontic appliance component in the second implementation. Figure 16 This is a schematic diagram of the structure of a portion of the orthodontic appliance component in the third implementation form; Figure 17 This is a schematic diagram of the first peripheral shape design of the first specific embodiment of the first embodiment of the present invention; Figures 18 to 20 These 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 the present invention; Figure 21 This is a schematic diagram of the protruding ridge design in the first specific embodiment of the first embodiment of the present invention; Figure 22 This is a schematic diagram showing the dimensional design of the first retaining part and the second retaining part in a first specific embodiment of the first embodiment of the present invention; Figures 23 to 25 This is a schematic diagram of the guide surface of a first specific embodiment of the first embodiment of the present invention; Figure 26 and Figure 27 This is a schematic diagram of different distribution forms of the first limiting structure in the first specific embodiment of the first embodiment of the present invention; Figure 28 and Figure 29 This is a schematic diagram of the protruding direction of the groove protrusion in a first specific embodiment of the first embodiment of the present invention; Figure 30 and Figure 31 This is a schematic diagram of an orthodontic appliance assembly having multiple sets of retention parts and additional positioning parts in a first specific embodiment of the first embodiment of the present invention; Figure 32 This is a schematic diagram of an additional positioning group in a first specific embodiment of the first embodiment of the present invention; Figures 33 to 36b This is a schematic diagram of an orthodontic appliance assembly having multiple sets of retention parts and additional positioning parts in a first specific embodiment of the first embodiment of the present invention; Figures 37 to 39 This is a schematic diagram of the orthodontic appliance assembly of a second specific embodiment of the first embodiment of the present invention; Figure 40a and Figure 40b This is a schematic diagram showing the orthodontic appliance components separated in a second specific embodiment of the first embodiment of the present invention; Figure 41 and Figure 42 These are schematic diagrams from different perspectives of the first and second retaining parts in a second specific embodiment of the first embodiment of the present invention when they cooperate with each other. Figures 43 to 55 This is a schematic diagram of several implementation forms of the groove and protrusion in the second specific embodiment of the first embodiment of the present invention; Figure 56 This is a schematic diagram of the first limiting structure and the second limiting structure in a second specific embodiment of the first embodiment of the present invention; Figure 57 and Figure 58 This is a schematic diagram of the guide surface of a second specific embodiment of the first embodiment of the present invention; Figure 59 This is a schematic diagram of the enclosure wall of a second specific embodiment of the first embodiment of the present invention; Figure 60 and Figure 61 This is a schematic diagram of the orthodontic appliance assembly according to the second embodiment of the present invention; Figure 62 This is a cross-sectional view of the enclosure wall and protrusion fitting together according to the second embodiment of the present invention; Figure 63 This is a schematic diagram of the enclosure wall and protrusion fitting together according to the second embodiment of the present invention; Figures 64 to 66 These are various specific examples of the cooperation forms between the multiple enclosures and multiple protrusions in the second embodiment of the present invention; Figures 67 to 75 These are various specific examples of the layout of multiple retaining groups in the second embodiment of the present invention. Detailed Implementation

[0008] The present invention will now be described in detail with reference to the embodiments shown in the accompanying drawings. However, these embodiments do not limit the present invention, 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 the present invention.

[0009] Combination Figures 1 to 6 The first embodiment of the present invention provides an orthodontic appliance assembly 300.

[0010] 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.

[0011] 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.

[0012] 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.

[0013] 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.

[0014] 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.

[0015] 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.

[0016] 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.

[0017] 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.

[0018] The following describes several specific embodiments of the orthodontic appliance assembly 300.

[0019] Combination Figures 1 to 6 In the first embodiment of the present invention, 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.

[0020] 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.

[0021] 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.

[0022] 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.

[0023] 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.

[0024] 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.

[0025] 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.

[0026] 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.

[0027] In practical applications, the first orthodontic appliance 100 and the second orthodontic appliance 200 can be formed using a hot-press molding process.

[0028] 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.

[0029] Additives can be formed during the process of generating the dental model, or they can be structures added to the dental model later.

[0030] 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.

[0031] 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.

[0032] 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.

[0033] Optional, combined Figure 6 and Figure 7The 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.

[0034] 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.

[0035] "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.

[0036] 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.

[0037] 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.

[0038] 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.

[0039] 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.

[0040] 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.

[0041] Optionally, multiple enclosing walls in the first enclosing wall group, the second enclosing wall group, and the third enclosing wall group are spaced apart from each other, or at least two of the multiple enclosing walls in the first enclosing wall group, the second enclosing wall group, and the third enclosing wall group are connected.

[0042] "Multiple enclosing walls in the first enclosing wall group, the second enclosing wall group, and the third enclosing wall group" may refer to the enclosing walls in the first enclosing wall group, the enclosing walls in the second enclosing wall group, and the enclosing walls in the third enclosing wall group.

[0043] Optionally, the first perimeter L is formed by enclosing four edges L1, L2, L3, and L4 connected in sequence.

[0044] The four edges L1, L2, L3, and L4 include a first edge L1 located on one of 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 located on the mesial side of the bottom wall 1211, and a fourth edge L4 located on the distal side of the bottom wall 1211. The first edge L1, the second edge L2, the third edge L3, and the fourth edge L4 are connected end to end in sequence to form the first perimeter L.

[0045] 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 along the dental arch direction.

[0046] Next, several implementation forms of the groove 121 and the protrusion 221 will be introduced.

[0047] In the first implementation form, combined Figures 6 to 10 , the enclosing wall 1212 connects a partial area of the first perimeter L. That is, in the circumferential direction of the first perimeter L, the enclosing wall 1212 is a semi-closed structure, and the groove 121 is a peripherally semi-closed groove.

[0048] The advantages of the enclosing wall 1212 in the semi-closed structure form are as follows: (1) The structure of the enclosing 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 enclosing wall 1212 in the semi-closed structure form 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.

[0049] Optionally, the enclosing wall 1212 includes a first enclosing wall 12121, and a junction area is formed between the first enclosing wall 12121 and the bottom wall 1211. The junction area is in the shape of "one", "L", "匚", or "冂".

[0050] Optionally, the enclosure 1212 includes a first enclosure 12121, which is located on at least one of the mesial, distal, buccal, or lingual sides of the base 1211.

[0051] Optionally, the first perimeter wall 12121 is a continuous structure extending along the circumferential direction of the first perimeter L, extending from the mesial side through the buccal side to the distal side. Alternatively, the first perimeter wall 12121 extends from the lingual side through the buccal side to the mesial or distal 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 mesial side through the lingual side to the distal side. Alternatively, the first perimeter wall 12121 extends from the buccal side through the lingual side to the mesial or distal side. Alternatively, the first perimeter wall 12121 extends from the buccal side through the lingual side to the buccal side.

[0052] Optionally, the enclosure 1212 may also include a second enclosure 12122, which is spaced apart from the first enclosure 12121 and is located on the tongue or cheek side of the bottom wall 1211. The cooperation between the first enclosure 12121 and the second enclosure 12122 can improve the ability to wrap the protrusion 221.

[0053] 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.

[0054] "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.

[0055] Combination Figures 7 to 10 , is a top view of several specific examples of enclosure 1212.

[0056] In a first specific example, the enclosure 1212 includes a first enclosure 12121 that connects at least a portion of an edge. For example, the first enclosure 12121 connects the entire area of ​​the third edge L3. 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.

[0057] 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 portions of the groove 121 corresponding to the first edge L1, the second edge L2, and the fourth edge L4 are openings P.

[0058] Combined Figure 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 partial regions of two adjacent edges. Here, an example is given where the first surrounding wall 12121 continuously connects the entire region of the third edge L3 and the entire region 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 two adjacent edges.

[0059] In this example, the first surrounding wall 12121 does not extend to the first edge L1 and the second edge L2, and the portions of the groove 121 corresponding to the first edge L1 and the second edge L2 are openings P.

[0060] Combined Figure 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 partial regions of three edges. Here, an example is given where the first surrounding wall 12121 continuously connects 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. At this time, the junction area formed between the first surrounding wall 12121 and the bottom wall 1211 is in a "匚" shape, and the first surrounding wall 12121 can also connect other three adjacent edges.

[0061] In this example, the first surrounding wall 12121 does not extend to the first edge L1, and the portion of the groove 121 corresponding to the first edge L1 is an opening P.

[0062] In the third specific example, the first surrounding wall 12121 is a continuous structure extending along the circumferential direction of the first perimeter 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 extension forms.

[0063] Combined Figure 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.

[0064] Optionally, the second surrounding wall 12122 can be located in the middle of the first edge L1.

[0065] Combined Figure 10 and Figure 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, take the example that the first surrounding wall 12121 continuously connects 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. At this time, the junction area formed between the first surrounding wall 12121 and the bottom wall 1211 is in the shape of "冂".

[0066] In this example, the first surrounding wall 12121 does not completely connect to the first peripheral edge L, and the partial region of the groove 121 corresponding to the first edge L1 is an opening P.

[0067] In the fifth specific example, 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 lingual side through the buccal side to the distal side. In other specific examples, the first surrounding wall 12121 can also be in other extension forms.

[0068] 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, the groove 121 forms an opening P at one edge, and the opening P can ensure the deformable amount of the groove 121.

[0069] 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.

[0070] 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.

[0071] Combined with Figure 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.

[0072] Combined with Figure 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, a corner structure is not formed at the connection of the fourth edge L4 and the first edge L1.

[0073] Combined with Figure 11When the termination 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.

[0074] Optionally, the first edge L1 of this 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.

[0075] Combined Figure 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.

[0076] Optionally, the second surrounding wall 12122 can be located in the middle of the first edge L1.

[0077] In the second implementation form, combined Figures 13 to 15 the surrounding wall 1212 connects all areas 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.

[0078] 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 to improve the stability of the cooperation between the groove 121 and the protrusion 221.

[0079] 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".

[0080] 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.

[0081] 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.

[0082] 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.

[0083] Combination Figure 14 and Figure 15 This is a schematic diagram of several specific examples of enclosure 1212.

[0084] Combination 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.

[0085] 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.

[0086] 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.

[0087] 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. It can be seen that... Figure 14 The height of the second region 1214 is relatively small.

[0088] 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.

[0089] 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.

[0090] 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.

[0091] 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.

[0092] Combination Figure 14 In a 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.

[0093] 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 around the periphery.

[0094] 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. It can be seen that... Figure 14 A slot P1 is formed above the second region 1214, which can increase the deformability of the second region 1214.

[0095] Combination 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.

[0096] 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.

[0097] In comparison 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

[0098] In the third implementation form, in combination with Figure 16 , the first retention part body 12 further includes an additional protrusion 122 connecting the groove 121, and the second retention part body 22 further includes an additional groove 222 connecting the protrusion 221. When the first appliance 100 and the second appliance 200 are in the 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 appliance 100 and the second appliance 200 in the horizontal plane X.

[0099] Between the first retention part body 12 and the second retention 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 retention part body 12 and the second retention part body 22.

[0100] The groove 121 is in a "C" shape, and the additional protrusion 122 connects one side wall 1211 of the groove 121. The cross-section of the connected groove 121 and the additional protrusion 122 in the horizontal plane X is approximately in a "6" shape.

[0101] The additional groove 222 is in a "C" shape, and the protrusion 221 connects one side wall of the additional groove 222. The cross-section of the connected additional groove 222 and the protrusion 221 in the horizontal plane X is approximately in a "9" shape.

[0102] The mutual cooperation between the "6"-shaped first retention part body 12 and the "9"-shaped second retention part body 22 can further improve the stability.

[0103] Optionally, in combination with Figure 17 , the shape of the first peripheral edge L of the bottom wall 1211 can be designed according to the shape of the contour line L' of the first occlusal surface A1.

[0104] The shape of the contour line L' of the first occlusal surface A1 is wavy. The contour line L' of the first occlusal surface A1 includes a first contour line L1' adjacent to the first edge L1 and a third contour line L3' adjacent to the third edge L3. The shape of the first contour line L1' matches the shape of the first edge L1, and the shape of the third contour line L3' matches the shape of the third edge L3.

[0105] "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.

[0106] 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.

[0107] 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.

[0108] 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.

[0109] 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.

[0110] 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.

[0111] Optional, combined 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, combined with... Figure 19 There is a gap S' between the bottom wall 1211 and the first occlusal surface T11 of the first tooth T1.

[0112] 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.

[0113] Combination Figure 18When 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 the anatomical shape matching 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 the anatomical shape.

[0114] Combination 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 may not 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.

[0115] 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.

[0116] Optional, combined Figure 18 and Figure 19 The enclosure 1212 includes a first end face 1217 on a first occlusal surface T11 located away from the first occlusal surface T11. At least a portion of the first end face 1217 is shaped to match 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 and the second occlusal surface A2 abut against each other. The matching shape of the first end face 1217 and the second occlusal surface A2 can improve the stability of the abutment.

[0117] Optional, combined 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.

[0118] 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.

[0119] Combination 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.

[0120] The second protrusion 132 is closer to the bottom wall 1211 than the first protrusion 131.

[0121] 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.

[0122] 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.

[0123] Combination 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.

[0124] 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.

[0125] 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.

[0126] Further explanations for the second example can be found in the first example, and will not be repeated here.

[0127] Optional, combined 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. The protrusion 221 is formed by the outer side 2212 and the top 221.

[0128] 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.

[0129] 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.

[0130] Optional, combined 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.

[0131] 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.

[0132] 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.

[0133] 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.

[0134] 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.

[0135] For example, combining Figure 23 and Figure 24 A guide surface 1312 may be formed at the end face 1311 of the first protrusion 131 away from the bottom wall 1211. The guide surface 1312 may be... Figure 23 The inclined plane shown or Figure 24 The curved surface shown is not limited to this.

[0136] The guide surface may not be provided at the end face 1311 of the first protrusion 131 away from the bottom wall 1211, such as... Figure 25 As shown, end face 1311 is a plane.

[0137] Optional, combined Figure 26The 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, the entire enclosure 1212 is provided with a continuous notch 13. 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.

[0138] Or, combine 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.

[0139] 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 Taking the two first protrusions 131 located on the proximal and distal sides of the first end face 1217 as an example, but not limited to this.

[0140] 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.

[0141] Optional, combined 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.

[0142] 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.

[0143] 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.

[0144] 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.

[0145] Combination 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.

[0146] 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.

[0147] 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.

[0148] Optional, combined 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.

[0149] 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 hemi-maxillary region C1 and the posterior tooth region of the second hemi-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 hemi-maxillary region C1 and the posterior tooth region of the second hemi-maxillary region C2 may be different. For example... Figure 30 As shown, 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. The structures of the first retention groups 31 and the second retention groups 32 are different.

[0150] Optional, combined Figure 30 The orthodontic appliance assembly 300 also includes at least one additional positioning group 33, which includes a first positioning part 331 located in the anterior tooth region of the first orthodontic appliance body 11 and a second positioning part 332 located in the anterior tooth region of the second orthodontic appliance body 21. 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.

[0151] Optional, combined Figure 31 and Figure 32The first positioning part 331 is located on the first lingual surface B1 of the first orthodontic appliance body 11, and the second positioning part 332 is located on the second lingual surface B2 of the second orthodontic appliance body 21. 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.

[0152] 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.

[0153] 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.

[0154] 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.

[0155] 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.

[0156] Optional, combined Figures 33 to 36b The orthodontic appliance assembly 300 also includes an auxiliary positioning structure 60 located between the first orthodontic appliance body 10 and the second orthodontic appliance body 20.

[0157] Combination Figures 33 to 34bThe 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.

[0158] 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.

[0159] Combination 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.

[0160] 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.

[0161] 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.

[0162] In summary, the first embodiment of the present invention 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 is convenient for patients to wear themselves.

[0163] 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.

[0164] Combination Figures 37 to 42 The second specific embodiment of the present invention provides an orthodontic appliance assembly 300.

[0165] 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.

[0166] 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.

[0167] 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.

[0168] 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.

[0169] 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.

[0170] In practical applications, the first orthodontic appliance 100 and the second orthodontic appliance 200 can be formed using a hot-press molding process.

[0171] 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.

[0172] Additives can be formed during the process of generating the dental model, or they can be structures added to the dental model later.

[0173] 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.

[0174] 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.

[0175] 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.

[0176] Optional, combined Figure 41 and Figure 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.

[0177] 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.

[0178] 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. 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.

[0179] 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.

[0180] 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.

[0181] 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.

[0182] 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.

[0183] 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.

[0184] "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.

[0185] Optional, combined Figure 43, the first periphery L is formed by enclosing four edges L1, L2, L3, and L4 connected in sequence.

[0186] In the direction of the dental arch, the bottom wall 1211 includes a first side and a second side arranged opposite to each other. When the entire bottom wall 1211 is 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 half-jaw region C1, and the second side is the distal side located in the second half-jaw region C2.

[0187] 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 connected end to end in sequence to form the first periphery L.

[0188] 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 close to the first lingual surface B1.

[0189] 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 along the dental arch direction.

[0190] Next, several implementation forms of the groove 121 and the protrusion 221 will be introduced.

[0191] In the first implementation form, in combination Figures 43 to 52 , the surrounding wall 1212 connects 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.

[0192] The advantage of the surrounding wall 1212 in the form of a semi-closed structure is that: (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 surrounding wall 1212 in the form of a semi-closed structure 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.

[0193] Optionally, the surrounding wall 1212 includes a first surrounding wall 12121. A交界区 (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" character, an "L" shape, a "匚" shape, or a "冂" shape.

[0194] 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.

[0195] 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.

[0196] 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.

[0197] 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.

[0198] "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.

[0199] Combination Figures 43 to 52 , is a top view of several specific examples of enclosure 1212.

[0200] In the first specific example, combined Figure 43 The enclosure 1212 includes a first enclosure 12121, which connects at least a portion of an edge. For example, the first enclosure 12121 connects a portion of a 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.

[0201] The first enclosure wall 12121 and the first tongue surface B1 cooperate to form a groove 121.

[0202] 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.

[0203] Combination 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.

[0204] The first enclosure wall 12121 and the first tongue surface B1 cooperate to form a groove 121.

[0205] 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.

[0206] Combination 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 a first side, and the second enclosure 12122 is located on a 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 form a groove 121.

[0207] 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.

[0208] Combination 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 a third enclosure 12123 located at the first edge L1.

[0209] Combination Figure 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 the entire region 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 region formed between the first surrounding wall 12121 and the bottom wall 1211 is in an "L" shape, and the first surrounding wall 12121 can also connect other adjacent three edges.

[0210] 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 from the first tongue surface B1.

[0211] 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, and 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.

[0212] Combined Figure 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 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. At this time, the junction region 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 adjacent three edges.

[0213] In this example, the first surrounding wall 12121 extends to the first tongue surface B1, 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.

[0214] 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, and 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.

[0215] Combined Figure 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 from the first surrounding wall 12121.

[0216] Optionally, the second surrounding wall 12122 can be located in the middle of the first edge L1.

[0217] Combined with Figure 50 and Figure 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, taking the example that the first surrounding wall 12121 continuously connects the partial region of the first edge L1, the entire regions of the second edge L2, the entire regions of the third edge L3, and the entire 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 the shape of "冂".

[0218] 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.

[0219] In the eighth specific example, the first surrounding wall 12121 is a continuous structure extending along the surrounding 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 can also be in other extension forms.

[0220] In the eighth 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, the groove 121 forms an opening P at one edge, and the opening P can ensure the deformable amount of the groove 121.

[0221] 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 surrounding direction of the first peripheral edge L.

[0222] 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.

[0223] 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.

[0224] Combined with Figure 50 , 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, a corner structure is not formed at the connection of the fourth edge L4 and the first edge L1.

[0225] Combined with Figure 51, when the termination 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, thereby further wrapping the protrusion 221.

[0226] Optionally, the first edge L1 of this 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.

[0227] Combination Figure 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 spaced apart from the first surrounding wall 12121.

[0228] Optionally, the second surrounding wall 12122 can be located in the middle of the first edge L1.

[0229] In the second implementation form, combination Figures 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 peripherally fully enclosed groove.

[0230] The advantage of the fully enclosed structure form of the surrounding wall 1212 is that: the surrounding wall 1212 can achieve all-round wrapping of the protrusion 221 and improve the stability of the cooperation between the groove 121 and the protrusion 221.

[0231] 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".

[0232] 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.

[0233] 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 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.

[0234] Optionally, the deformability of different regions of the surrounding wall 1212 can be controlled by controlling the material thickness and hardness of the surrounding wall 1212 formed. Or, different structures can be formed in different regions of the surrounding wall 1212 to control the deformability of different regions of the surrounding wall 1212, but not limited thereto.

[0235] Combination Figure 54 and Figure 55 This is a schematic diagram of several specific examples of enclosure 1212.

[0236] Combination 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.

[0237] 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.

[0238] 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.

[0239] 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. It can be seen that... Figure 54 The height of the second region 1214 is relatively small.

[0240] 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.

[0241] 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.

[0242] 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.

[0243] 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.

[0244] Combination Figure 54 In a 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.

[0245] 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 around the periphery.

[0246] 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. It can be seen that... Figure 54 A slot P1 is formed above the second region 1214, which can increase the deformability of the second region 1214.

[0247] Combination 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.

[0248] 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.

[0249] 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.

[0250] 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.

[0251] Optional, combined 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.

[0252] Optionally, the first limiting structure 13 may also be located at the first tongue surface B1.

[0253] 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.

[0254] Combination Figure 56 The first limiting structure 13 is a notch, which is formed by 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.

[0255] 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.

[0256] 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.

[0257] The protrusion 221 is formed by the outer side 2212 and the top 221.

[0258] 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.

[0259] For example, combining Figure 57 and Figure 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... Figure 57 The inclined plane shown or Figure 58 The curved surface shown is not limited to this.

[0260] 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 at 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.

[0261] Or, combine 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 protrusion 23 from disengaging from the notch 13.

[0262] Combination Figure 59 The first wall 12121 connects the first side, the second side, and the buccal side of the base wall 1211. The second wall 12122 connects the lingual side of the base 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.

[0263] 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.

[0264] 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.

[0265] 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.

[0266] In summary, the second embodiment of the present invention 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.

[0267] 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.

[0268] Combination Figures 60 to 63 The second embodiment of the present invention provides an orthodontic appliance assembly 300.

[0269] 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.

[0270] 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.

[0271] 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.

[0272] 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.

[0273] 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.

[0274] Combination Figure 63 The different regions include the first posterior region C11, the second posterior region C21, and the anterior region C3. Alternatively, the different regions include the first posterior region C11, the second posterior region C21, the first anterior region C31, and the second anterior region C32. The first anterior region C31 and the second anterior region C32 together form the anterior region C3.

[0275] 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.

[0276] 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.

[0277] 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.

[0278] 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.

[0279] 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.

[0280] 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.

[0281] 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.

[0282] 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).

[0283] 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.

[0284] 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.

[0285] "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 the positive and negative movement limit in the first direction Y1), the second movement limit (including the positive and negative movement limit in the second direction X1), and the rotation limit (including the clockwise rotation limit Z1 and the counterclockwise rotation limit Z2) be achieved.

[0286] 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.

[0287] 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.

[0288] 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.

[0289] 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.

[0290] "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.

[0291] 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.

[0292] 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.

[0293] 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.

[0294] 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.

[0295] 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.

[0296] 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.

[0297] 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.

[0298] 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.

[0299] 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.

[0300] 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.

[0301] 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.

[0302] 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.

[0303] 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.

[0304] 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.

[0305] 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.

[0306] 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.

[0307] 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.

[0308] 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.

[0309] 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.

[0310] 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.

[0311] 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.

[0312] 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.

[0313] 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.

[0314] 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.

[0315] 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.

[0316] 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.

[0317] 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.

[0318] 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.

[0319] 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.

[0320] "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.

[0321] 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.

[0322] 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.

[0323] 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.

[0324] "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.

[0325] 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.

[0326] 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.

[0327] 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.

[0328] 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.

[0329] 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.

[0330] 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.

[0331] 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".

[0332] 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.

[0333] When 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 all connected to the first orthodontic appliance body 10 or the second orthodontic appliance body 20, 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 spaced apart or at least partially connected.

[0334] Below, in conjunction with Figures 64 to 67 Taking the retention assembly 40 in the posterior tooth region of the first orthodontic appliance body 10 as an example, the interaction between multiple walls 42 and multiple protrusions 41 is described. The example is illustrated with the first side E1 as the lower side, the third side E3 as the upper side, the second side E2 as the left side, and the fourth side E4 as the right side, with the walls 42 located in the posterior tooth region of the first orthodontic appliance body 10. For ease of explanation, the first wall 42a, the second wall 42b, the third wall 42c, and the fourth wall 42d are used as examples.

[0335] In the first specific example, combined Figure 64 The first enclosure 42a is located on the first side E1 of the first protrusion 41a, and the second enclosure 42b is located on the second side E2 of the second protrusion 41b. The first enclosure 42a and the second enclosure 42b are connected, and the first protrusion 41a and the second protrusion 41b are integrated. The first enclosure 42a and the second enclosure 42b can restrict the movement of the second orthodontic appliance body 20 relative to the first orthodontic appliance body 10 in the directions toward the lower side and the left side.

[0336] The first enclosure wall 42a and the second enclosure wall 42b have an "L"-shaped cross section parallel to the horizontal plane X.

[0337] In the second specific example, combined Figure 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 orthodontic appliance body 20 with respect to the first orthodontic appliance body 10 in the directions of the lower side, the left side, and the upper side.

[0338] The cross-section of the first surrounding wall 42a, the second surrounding wall 42b, and the third surrounding wall 42c parallel to the horizontal plane X is in the shape of a "匚".

[0339] In the third specific example, in combination with Figure 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 orthodontic appliance body 20 with respect to the first orthodontic appliance body 10 in the directions of the lower side, the left side, and the right side.

[0340] 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 the shape of a "匚".

[0341] 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 orthodontic appliance body 10 or the second orthodontic 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 multiple connected surrounding walls 42 can improve the strength and forming convenience of the surrounding wall 42, and the multiple connected protrusions 41 can improve the strength and forming convenience of the protrusion 41.

[0342] Next, in combination with Figures 67 to 75 , various layout forms of the multiple retention groups 40 of the entire orthodontic appliance assembly 300 will be introduced. The multiple retention groups 40 can limit the relative movement of the first orthodontic appliance body 10 and the second orthodontic appliance body 20 in the entire first plane. Taking the example where all the surrounding walls 42 are connected to the first orthodontic appliance body 10.

[0343] In the first specific example, in combination with Figure 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. The enclosure 42 includes a first enclosure 42a and a second enclosure 42b located in the first posterior tooth region C11, and a third enclosure 42c and a fourth enclosure 42d located in the anterior tooth region C3. The corresponding first protrusion 41a and second protrusion 41b are integrated, and the third protrusion 41c and fourth protrusion 41d are integrated.

[0344] 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.

[0345] 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.

[0346] 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.

[0347] 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.

[0348] 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.

[0349] 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.

[0350] 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.

[0351] 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.

[0352] Combination Figure 68 The diagram is a 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, and the two retention groups are spaced apart from each other.

[0353] 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.

[0354] 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.

[0355] 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.

[0356] 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.

[0357] 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.

[0358] 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.

[0359] 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.

[0360] 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.

[0361] 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.

[0362] Combination Figure 69 This 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.

[0363] Combination Figure 70 This 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.

[0364] Combination Figure 71 The diagram is a 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.

[0365] 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.

[0366] 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.

[0367] 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.

[0368] 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.

[0369] 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.

[0370] 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.

[0371] 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.

[0372] 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.

[0373] 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.

[0374] 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.

[0375] Combination Figure 72 The diagram is a schematic 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.

[0376] 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.

[0377] 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.

[0378] 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.

[0379] 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.

[0380] 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.

[0381] 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.

[0382] 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.

[0383] 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.

[0384] 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.

[0385] Combination Figure 73 The diagram is a schematic 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.

[0386] 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.

[0387] 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.

[0388] 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.

[0389] 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.

[0390] 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.

[0391] 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.

[0392] 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 interconnected, 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.

[0393] 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.

[0394] Combination Figure 74 The diagram is for 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.

[0395] The retention group 40 of the first posterior region C11 and the retention group 40 of the first anterior region C31 can be obtained by Figure 74 The first dashed line G1 separates the two areas. The area to the upper right of the first dashed line G1 is the retention group 40 of the first anterior tooth region C31, and the area to the lower left of the first dashed line G1 is the retention group 40 of the first posterior tooth region C11.

[0396] 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.

[0397] The retention group 40 of the second posterior region C21 and the retention group 40 of the second anterior region C32 can be obtained by Figure 74 The second dashed line G2 separates the two areas. The area to the upper left of the second dashed line G2 is the retention group 40 of the second anterior tooth region C32, and the area to the lower right of the second dashed line G2 is the retention group 40 of the second posterior tooth region C21.

[0398] 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.

[0399] 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.

[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, 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.

[0401] 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.

[0402] 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.

[0403] 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.

[0404] 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.

[0405] 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.

[0406] 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.

[0407] 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.

[0408] 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.

[0409] The descriptions of the second posterior region C21 and the second anterior region C32 can be found in the descriptions of the first posterior region C11 and the first anterior region C31, and will not be repeated here.

[0410] Combination Figure 75 This 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.

[0411] The retention group 40 of the first anterior region C31 and the retention group 40 of the second anterior region C32 can be obtained by Figure 75 The teeth are separated by the midline C. The retention group 40 of the first anterior region C31 is on the left side of the midline C, and the retention group 40 of the second anterior region C32 is on the right side of the midline C.

[0412] The retention group 40 of the first anterior tooth region C31 and the retention group 40 of the second anterior tooth region C32 are interconnected. The two retention groups 40 extend from the first anterior tooth region C31 to the second anterior tooth region C32, forming a continuous structure.

[0413] 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.

[0414] 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.

[0415] 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.

[0416] 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.

[0417] 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.

[0418] 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.

[0419] 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.

[0420] 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.

[0421] 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.

[0422] Optional, combined Figure 62 The orthodontic appliance assembly 300 also 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 with each other to restrict the relative movement of the first orthodontic appliance body 10 and the second orthodontic appliance body 20 in the vertical Z direction.

[0423] 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.

[0424] 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.

[0425] 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 and tongue towards Y1.

[0426] 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.

[0427] 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.

[0428] In summary, in the second embodiment of the present invention, 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.

[0429] 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.

[0430] The detailed descriptions listed above are merely specific descriptions of feasible embodiments of the present invention, and are not intended to limit the scope of protection of the present invention. All equivalent embodiments or modifications made without departing from the spirit of the present invention should be included within the scope of protection of the present invention.

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 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, and a boundary area is formed between the first surrounding wall and the bottom wall. The boundary area is in a "one" shape, an "L" shape, a "匚" shape, or a "冂" shape.

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 peripheral edge. The first surrounding wall extends from the first side to the second side via the buccal side, or the first surrounding wall extends from the lingual side to the first side or the second side via the buccal side, or the first surrounding wall extends from the lingual side to the lingual side via the buccal side, or the first surrounding wall extends from the first side to the second side via the lingual side, or the first surrounding wall extends from the buccal side to the first side or the second side via the lingual side, or the first surrounding wall extends from the buccal side to the buccal side via the lingual side.

10. The orthodontic appliance assembly according to claim 9, characterized in that, The surrounding wall further includes a second surrounding wall which is arranged at an interval 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 peripheral edge is formed by enclosing four edges connected in sequence. The surrounding wall includes a first surrounding wall which connects at least a partial area of one edge, or the first surrounding wall continuously connects at least a partial area of two adjacent edges, or the first surrounding wall continuously connects at least a partial area of three edges, or the first surrounding wall continuously connects partial areas of the 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 which is arranged at an interval 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 areas of the first peripheral edge.

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, and 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 peripheral edge, the surrounding wall includes a first area and a second area, and the deformable amount of the first area is less than that of the second area.

18. The orthodontic appliance assembly according to claim 17, characterized in that, In the vertical direction, the first area has a first average height, and the second area has a second average height, and the first average height is greater than the second average height; or the second area includes a second area body and at least one slot penetrating the second area body in the thickness direction of the surrounding wall. The second area 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 spaced apart and arranged face to face.

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.

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