Appliance assembly

Abstract

This utility model discloses an orthodontic appliance assembly, including a first orthodontic appliance and a second orthodontic appliance. The first orthodontic appliance includes a first appliance body and a groove protruding from a first occlusal surface of the first appliance body. The second orthodontic appliance includes a second appliance body and a protrusion protruding from a second occlusal surface of the second appliance body. Both the groove and the protrusion extend from the posterior tooth region to the anterior tooth region on one side of the dental midline. The groove is formed by combining a first part and a second part, which are discontinuous on both the buccal and lingual sides. The protrusion is a continuous structure. When the first and second orthodontic appliances are in occlusal positions, the groove and the protrusion cooperate to restrict the relative movement of the first and second orthodontic appliances in at least some directions within the horizontal plane. The groove of this utility model includes a first part and a second part that are discontinuous on the buccal and lingual sides. The groove is not a completely continuous structure, which facilitates the protrusion entering the groove to achieve positioning.

Description

Technical Field

[0001] This utility model relates to the field of orthodontic technology, and in particular 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. Utility Model Content

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

[0005] Optionally, the first part is entirely located in the posterior tooth region, and the second part is entirely located in the anterior tooth region.

[0006] Optionally, the first portion includes a first perimeter and a second perimeter located on the buccal and lingual sides of the first occlusal surface, respectively, the second portion is located on the mesial side of the first portion, and the second portion includes a third perimeter extending along the labial and lingual direction.

[0007] Optionally, the lengths of the first enclosure and the second enclosure are approximately equal in the near-to-far direction.

[0008] Optionally, the first part further includes a fourth enclosure connecting the first enclosure and the second enclosure, the fourth enclosure extending in the buccal-lingual direction and located on the distal side of the first enclosure and the second enclosure.

[0009] Optionally, the fourth wall smoothly transitions to the cheek side of the first wall, and the fourth wall smoothly transitions to the tongue side of the second wall.

[0010] Optionally, the first portion includes a sloping section on the distal side, the sloping section extending to the fourth enclosure wall, the sloping section having an increasing trend along a first direction, the first direction being the direction from the distal to the proximal side.

[0011] Optionally, the proximal end face of the third enclosure has an acute angle toward the distal side between it and the first occlusal face.

[0012] Optionally, in the posterior tooth region, the first occlusal surface matches the occlusal surface of the first jaw, and the first upper surface of the protrusion, which is away from the second occlusal surface, fully matches the first occlusal surface.

[0013] Optionally, in the anterior region, the first occlusal surface matches the lingual surface of the first jaw, and the second upper end face of the protrusion, which is away from the second occlusal surface, has a gap with the first occlusal surface.

[0014] Optionally, in the posterior tooth region, the second occlusal surface matches the occlusal surface of the second jaw, the third upper end face of the groove away from the first occlusal surface completely matches the second occlusal surface, or there is a gap between the third upper end face of the groove away from the first occlusal surface and the second occlusal surface.

[0015] Optionally, the protrusion includes a first segment, a second segment, and a third segment connected in sequence. The first segment matches the first part, the third segment matches the second part, the second segment is exposed outside the groove, and the width of the second segment in the buccal-lingual direction is smaller than the width of the first segment in the buccal-lingual direction.

[0016] Optionally, the outer contour of the protrusion is converging along a second direction, which is the direction away from the second occlusal surface.

[0017] Optionally, the second part corresponds to at least one of the settings for teeth 2-4.

[0018] Optionally, at at least one location in the posterior tooth region, the height of the protrusion is greater than the height of the groove.

[0019] Optionally, when the first orthodontic appliance and the second orthodontic appliance are in occlusion, a portion of the protrusion is exposed on the buccal and lingual sides of the posterior teeth in the area between the groove and the second occlusal surface.

[0020] Optionally, when the first orthodontic appliance and the second orthodontic appliance are in occlusal position, in the posterior tooth region, there is a gap between the third upper end face of the groove away from the first occlusal surface and the second occlusal surface.

[0021] Optionally, in the posterior region, the first occlusal surface matches the occlusal surface of the first jaw, and the opening occlusal height of the orthodontic appliance assembly is determined by the height of the protrusion.

[0022] Optionally, when the first orthodontic appliance and the second orthodontic appliance are in occlusal position, the gap between the first occlusal surface and the second occlusal surface in the posterior tooth region is no greater than 7 mm.

[0023] Optionally, when the first orthodontic appliance and the second orthodontic appliance are in occlusion, a through hole is formed between the body of the first orthodontic appliance and the body of the second orthodontic appliance in the anterior teeth area, communicating with the labial and lingual sides.

[0024] Optionally, the groove is integrally formed with the first orthodontic appliance body, the first orthodontic appliance body forms a first cavity to accommodate the first jaw, and the groove forms a first cavity communicating with the first cavity; the protrusion is integrally formed with the second orthodontic appliance body, the second orthodontic appliance body forms a second cavity to accommodate the second jaw, and the protrusion forms a second cavity communicating with the second cavity.

[0025] Optionally, the first orthodontic appliance further includes a first limiting structure connecting the groove, and the second orthodontic appliance further includes a second limiting structure connecting the protrusion. When the first orthodontic appliance and the second orthodontic appliance are in an occlusal state, the first limiting structure and the second limiting structure cooperate with each other to restrict the relative vertical movement of the first orthodontic appliance and the second orthodontic appliance.

[0026] Optionally, the first part includes a first perimeter wall and a second perimeter wall located on the buccal and lingual sides of the first occlusal surface, respectively. The first limiting structure includes a first protrusion ridge connecting at least one of the first perimeter wall and the second perimeter wall. The first protrusion ridge protrudes toward the interior of the groove. The second limiting structure includes a second protrusion ridge connecting the protrusion. The second protrusion ridge protrudes toward the buccal and lingual sides. The first protrusion ridge and the second protrusion ridge cooperate with each other.

[0027] Optionally, the first convex ridge connects to at least one of the first enclosure wall and the second enclosure wall at an end away from the first occlusal surface, and the second convex ridge connects to the end of the protrusion away from the second occlusal surface. When the first orthodontic appliance and the second orthodontic appliance are in an occlusal state, the second convex ridge is sandwiched between the inner surface of the first convex ridge near the first occlusal surface and the first occlusal surface.

[0028] Optionally, the second part includes a third perimeter extending in the buccal-lingual direction, the first limiting structure includes a protrusion connecting one end of the third perimeter away from the first occlusal surface, the protrusion protruding toward the distal side, and the second limiting structure includes a recess located on the proximal surface of the protrusion, the protrusion and the recess cooperating with each other.

[0029] Optionally, there is a gap between the recess and the second occlusal surface.

[0030] Optionally, the orthodontic assembly further includes at least one connecting plate that connects the third enclosure and the labial or lingual side of the protrusion, and / or the connecting plate connects the labial or lingual side of the recess.

[0031] Optionally, when the connecting plate connects to the lip or tongue side of the recess, the side of the recess away from the connecting plate is an opening.

[0032] Optionally, at least one connecting plate includes a first connecting plate and a second connecting plate, wherein the first connecting plate connects the third enclosure wall and the lip side of the protrusion, and the second connecting plate connects the tongue side of the recess; or, the first connecting plate connects the third enclosure wall and the tongue side of the protrusion, and the second connecting plate connects the lip side of the recess.

[0033] Optionally, the groove is integrally formed with the first limiting structure, and the first cavity formed by the groove is interconnected with the first chamber formed by the first limiting structure; the protrusion is integrally formed with the second limiting structure, and the second cavity formed by the protrusion is interconnected with the second chamber formed by the second limiting structure.

[0034] Optionally, the orthodontic appliance assembly includes a first hemi-maxillary region and a second hemi-maxillary region located on both sides of the dental midline, and two sets of retention groups located in the first hemi-maxillary region and the second hemi-maxillary region respectively. Each retention group includes the groove and the protrusion that cooperate with each other, and the two sets of retention groups are symmetrically arranged with respect to the dental midline.

[0035] Optionally, the first orthodontic appliance is integrally formed by a hot-press molding process, and the second orthodontic appliance is integrally formed by a hot-press molding process.

[0036] Compared with the prior art, the beneficial effects of this utility model are as follows: This utility model connects the first orthodontic appliance and the second orthodontic appliance through a groove and a protrusion. The groove includes a first part and a second part that are disconnected from each other on the cheek side and the tongue side. The groove is not a completely continuous structure, which makes it easy for the protrusion to enter the groove and achieve positioning. Attached Figure Description

[0037] Figure 1 This is a schematic diagram of an orthodontic appliance assembly according to one embodiment of the present invention;

[0038] Figure 2 This is a schematic diagram of the first orthodontic appliance according to one embodiment of the present invention;

[0039] Figure 3 This is a schematic diagram of the second orthodontic appliance according to one embodiment of the present invention;

[0040] Figure 4 This is a schematic diagram of the first and second orthodontic appliances in an engaged state according to one embodiment of the present invention.

[0041] Figure 5 This is a schematic diagram of the groove and protrusion fitting together when there is no fourth enclosure wall;

[0042] Figure 6 This is a schematic diagram showing the fit between the groove and the protrusion when there is a fourth enclosure wall;

[0043] Figure 7 This is a perspective view of the first orthodontic appliance according to one embodiment of the present invention;

[0044] Figure 8 and Figure 9 These are schematic diagrams of the first part from different perspectives;

[0045] Figure 10 This is a schematic diagram of the third enclosure wall fitting protrusion and connecting plate according to one embodiment of this utility model;

[0046] Figure 11 and Figure 12 These are schematic diagrams of the protrusions from different perspectives;

[0047] Figure 13 This is a perspective view of the protrusion and groove matching in one embodiment of this utility model. Detailed Implementation

[0048] The present invention will now be described in detail with reference to the specific 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 protection scope of the present invention.

[0049] Combination Figures 1 to 4 One embodiment of this utility model provides an orthodontic appliance assembly 300.

[0050] The orthodontic appliance assembly 300 includes a first orthodontic appliance 100 corresponding to the first jaw and a second orthodontic appliance 200 corresponding to the second jaw.

[0051] The first orthodontic appliance 100 includes a first orthodontic appliance body 10 and a groove 11 protruding from the first occlusal surface A1 of the first orthodontic appliance body 10. The second orthodontic appliance 200 includes a second orthodontic appliance body 20 and a protrusion 21 protruding from the second occlusal surface A2 of the second orthodontic appliance body 20.

[0052] Both the groove 11 and the protrusion 21 extend from the posterior tooth region to the anterior tooth region on one side of the dental midline C. The groove 11 is formed by combining a first part 111 and a second part 112, which are discontinuous on both the buccal and lingual sides. The protrusion 21 is a continuous structure. When the first orthodontic appliance 100 and the second orthodontic appliance 200 are in occlusal position, the groove 11 and the protrusion 21 cooperate to restrict the relative movement of the first orthodontic appliance 100 and the second orthodontic appliance 200 in at least some directions within the horizontal plane.

[0053] "Both groove 11 and protrusion 21 extend from the posterior tooth region to the anterior tooth region on one side of the dental midline C" means that the orthodontic appliance assembly 300 includes a first semi-maxillary region C1 and a second semi-maxillary region C2 located on both sides of the dental midline C. The groove 11 extends from the posterior tooth region of the first semi-maxillary region C1 to the anterior tooth region, and the protrusion 21 extends from the posterior tooth region of the first semi-maxillary region C1 to the anterior tooth region.

[0054] "The first part 111 and the second part 112 are both broken on the buccal and lingual sides" means that the first part 111 and the second part 112 are connected only by the first occlusal surface A1, and the first part 111 and the second part 112 are broken from each other on the buccal side and on the lingual side. The entire groove 11 has a broken area as it extends from the posterior tooth area to the anterior tooth area.

[0055] "Protrusion 21 is a continuous structure" means that the entire protrusion 21 is not interrupted as it extends from the posterior tooth region to the anterior tooth region.

[0056] When the first orthodontic appliance 100 and the second orthodontic appliance 200 are in an occlusal state, the protrusion 21 extends from the first part 111 to the second part 112 to achieve mutual engagement between the protrusion 21 and the entire groove 11. The mutual engagement between the groove 11 and the protrusion 21 allows the first orthodontic appliance 100 and the second orthodontic appliance 200 to maintain a preset relative position, thereby achieving tooth correction and retention, such as jaw position adjustment.

[0057] In this embodiment, the first orthodontic appliance 100 and the second orthodontic appliance 200 are connected by a groove 11 and a protrusion 21. The groove 11 includes a first part 111 and a second part 112 that are disconnected from each other on the cheek side and the tongue side. The groove 11 is not a completely continuous structure, which makes it easy for the protrusion 21 to enter the groove 11 and achieve positioning.

[0058] In this embodiment, the groove 11 and the protrusion 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 groove 11 and the protrusion 21 will not interfere with the lip and cheek muscles, which can greatly improve the patient's experience.

[0059] During the molding process of the first orthodontic appliance 100 and the second orthodontic appliance 200, adhesion problems may occur. Generally, the closer the distance between the structures, the more serious the adhesion problem. In this embodiment, the first part 111 and the second part 112 of the groove 11 are separated from each other, which can reduce or avoid the adhesion problem.

[0060] Optionally, both the first orthodontic appliance 100 and the second orthodontic appliance 200 are invisible orthodontic appliances made of polymer materials, with one of the first and second jaws being the maxilla and the other the mandible. This embodiment uses the first jaw as the maxilla and the second jaw as the mandible as an example.

[0061] The first orthodontic appliance body 10 forms a first cavity S1 to accommodate the first jaw, and the second orthodontic appliance body 20 forms a second cavity S2 to accommodate the second jaw. When the patient wears the orthodontic appliance assembly 300, the first orthodontic appliance 100 is worn on the first jaw through the first cavity S1, and the second orthodontic appliance 200 is worn on the second jaw through the second cavity S2.

[0062] Optionally, the groove 11 is integrally formed with the first orthodontic appliance body 10, and the groove 11 forms a first cavity S1' that communicates with the first cavity S1. For example, the first orthodontic appliance 100 can be integrally formed by a hot-press molding process, that is, the first orthodontic appliance body 10 and the groove 11 can be integrally formed by a hot-press molding process, but it is not limited thereto.

[0063] The first cavity S1' is a relatively narrow gap. When the length of the first cavity S1' in the mesiodistal direction is too long, problems such as difficulty in demolding and poor molding effect are likely to occur. The groove 11 of this embodiment includes a first part 111 and a second part 112 that are disconnected from each other on the cheek side and the tongue side. The lengths of the first part 111 and the second part 112 in the mesiodistal direction are relatively small, which facilitates molding and improves the molding effect.

[0064] Optionally, the protrusion 21 is integrally formed with the second orthodontic appliance body 20, and the protrusion 21 forms a second cavity S2' that connects to the second cavity S2. For example, the second orthodontic appliance 200 can be integrally formed by a hot-press molding process, that is, the second orthodontic appliance body 20 and the protrusion 21 can be integrally formed by a hot-press molding process, but it is not limited thereto.

[0065] The protrusion 21 is a continuous structure, and the second cavity S2' formed therein is also a continuous structure, which can effectively improve the overall strength of the protrusion 21.

[0066] Optionally, the first orthodontic appliance 100 further includes a first limiting structure 12 connecting the groove 11, and the second orthodontic appliance 200 further includes a second limiting structure 22 connecting the protrusion 21. When the first orthodontic appliance 100 and the second orthodontic appliance 200 are in an engaged state, the first limiting structure 12 and the second limiting structure 22 cooperate with each other to restrict the relative vertical movement of the first orthodontic appliance 100 and the second orthodontic appliance 200.

[0067] When the first orthodontic appliance 100 and the second orthodontic appliance 200 are in an occlusal state, the first limiting structure 12 and the second limiting structure 22 cooperate with each other while the groove 11 and the protrusion 21 cooperate, simultaneously limiting the first orthodontic appliance 100 and the second orthodontic appliance 200 in the horizontal and vertical directions. This embodiment achieves multi-dimensional limiting through a simple structure, greatly improving the connection stability between the first orthodontic appliance 100 and the second orthodontic appliance 200, thereby improving the corresponding orthodontic effect, and is convenient for patients to wear themselves.

[0068] Optionally, the groove 11 and the first limiting structure 12 are integrally formed, and the first cavity S1' formed by the groove 11 and the first chamber S1” formed by the first limiting structure 12 are interconnected. This can improve the stability of the connection between the groove 11 and the first limiting structure 12.

[0069] Since the groove 11 includes a first part 111 and a second part 112 that are disconnected from each other on the cheek side and the tongue side, it facilitates the demolding of the first limiting structure 12 and the groove 11, and at the same time, it can improve the molding effect.

[0070] Optionally, the protrusion 21 and the second limiting structure 22 are integrally formed, and the second cavity S2' formed by the protrusion 21 and the second chamber S2” formed by the second limiting structure 22 are interconnected. This can improve the stability of the connection between the protrusion 21 and the second limiting structure 22.

[0071] Optionally, the orthodontic appliance assembly 300 includes two sets of retention groups located in the first hemi-maxillary region C1 and the second hemi-maxillary region C2, respectively. Each retention group includes a groove 11 and a protrusion 21 that cooperate with each other. The two sets of retention groups are symmetrically arranged with respect to the dental midline C.

[0072] Specifically, the first semi-maxillary region C1 includes a groove 11 and a protrusion 21 extending from the posterior tooth region to the anterior tooth region, and the second semi-maxillary region C2 includes a groove 11 and a protrusion 21 extending from the posterior tooth region to the anterior tooth region, which can realize the synchronous positioning of the first semi-maxillary region C1 and the second semi-maxillary region C2, thereby improving the stability of the entire orthodontic appliance assembly 300.

[0073] The specific forms of the groove 11 and the protrusion 21 are described below.

[0074] Combination Figures 5 to 8The first part 111 of the groove 11 is entirely located in the posterior tooth region, and the second part 112 is entirely located in the anterior tooth region.

[0075] Part 111 does not extend into the anterior region, and Part 112 does not extend into the posterior region. Part 111 and Part 112 are roughly separated at the boundary between the posterior and anterior regions.

[0076] Part 112 can be set for at least one of teeth 2-4, but is not limited thereto. Part 112 does not extend to the central incisors, thus avoiding interference with normal orthodontic treatment of the central incisors, such as rotation, intrusion, or elongation.

[0077] Optional, combined Figure 5 The first part 111 includes a first perimeter 111a and a second perimeter 111b located on the buccal and lingual sides of the first occlusal surface A1, respectively.

[0078] The first occlusal wall 111a extends along the mesiodistal direction on the buccal side of the first occlusal surface A1, and the second occlusal wall 111b extends along the mesiodistal direction on the lingual side of the first occlusal surface A1. The area of ​​the first jaw traversed by the first occlusal wall 111a is approximately the same as the area of ​​the first jaw traversed by the second occlusal wall 111b. For example, the first occlusal wall 111a is located on the buccal side of the three distal molars, and the second occlusal wall 111b is located on the lingual side of the three distal molars.

[0079] The lengths of the first enclosure 111a and the second enclosure 111b in the near-to-far direction are approximately equal, and the near-mid surface of the first enclosure 111a and the near-mid surface of the second enclosure 111b are approximately on the same plane.

[0080] The first cavity S1' formed by the groove 11 includes the cavity formed by the first enclosure wall 111a and the cavity formed by the second enclosure wall 111b.

[0081] The first enclosure 111a and the second enclosure 111b are arranged facing each other, and a space for accommodating the protrusion 21 is formed between the first enclosure 111a and the second enclosure 111b. When the protrusion 21 is fitted into this space, the relative movement of the first orthodontic appliance 100 and the second orthodontic appliance 200 in the buccal-lingual direction can be restricted.

[0082] Optional, combined Figure 6 The first part 111 also includes a fourth enclosure 111d connecting the first enclosure 111a and the second enclosure 111b. The fourth enclosure 111d extends in the buccal-lingual direction and is located on the distal side of the first enclosure 111a and the second enclosure 111b.

[0083] The first cavity S1' formed by the groove 11 may further include the cavity formed by the fourth surrounding wall 111d. The cavities formed by the first surrounding wall 111a, the second surrounding wall 111b, and the fourth surrounding wall 111d may be interconnected.

[0084] The first surrounding wall 111a, the fourth surrounding wall 111d, and the second surrounding wall 111b are sequentially connected to form a "C" shape. The first surrounding wall 111a, the fourth surrounding wall 111d, and the second surrounding wall 111b form a space for accommodating the protrusion 21. When the protrusion 21 is fitted into this space, it can restrict the relative movement of the first orthodontic appliance 100 and the second orthodontic appliance 200 in the buccolingual direction, and restrict the second orthodontic appliance 200 from moving distally relative to the first orthodontic appliance 100.

[0085] Optionally, the second part 112 is located on the mesial side of the first part 111, and the second part 112 includes a third surrounding wall 112c extending in the buccolingual direction.

[0086] The first cavity S1' formed by the groove 11 further includes the cavity formed by the third surrounding wall 112c.

[0087] When the protrusion 21 and the third surrounding wall 112c cooperate with each other, it restricts the second orthodontic appliance 200 from moving mesially relative to the first orthodontic appliance 100.

[0088] When the first part 111 includes the first surrounding wall 111a, the fourth surrounding wall 111d, and the second surrounding wall 111b, and the second part 112 includes the third surrounding wall 112c, the proximal ends of the first surrounding wall 111a and the second surrounding wall 111b are disconnected from the third surrounding wall 112c. The entire groove 11 is a structure formed by enclosing a spaced "C" shape and a "|" shape. When the protrusion 21 and the groove 11 cooperate with each other, it can restrict the relative movement of the first orthodontic appliance 100 and the second orthodontic appliance 200 in the entire horizontal plane.

[0089] Optionally, the fourth surrounding wall 111d and the surface of the first surrounding wall 111a near the buccal side are smoothly transitioned, and the fourth surrounding wall 111d and the surface of the second surrounding wall 111b near the lingual side are smoothly transitioned. The outer contour of the first part 111 is generally a U-shaped structure, and the first distal end face 1111 of the first part 111 is generally arc-shaped, which can avoid the breakage of the thermoplastic membrane caused by sharp bends, etc., and can avoid stress concentration at the corners.

[0090] The first part 111 includes a distal inner surface 1112 opposite to the first distal end face 1111, and the distal inner surface 1112 is generally arc-shaped. The second distal end face 211 of the protrusion 21 is generally arc-shaped. When the groove 11 and the protrusion 21 match each other, the distal inner surface 111 of the first part 111 matches the second distal end face 211 of the protrusion 21.

[0091] Optionally, in combination Figure 7 and Figure 8 The first part 111 includes a slope section 1113 on the distal side. Taking the first part 111 including a fourth enclosure wall 111d as an example, the slope section 1113 extends to the fourth enclosure wall 111d.

[0092] The ramp section 1113 can be formed by the distal section of the first enclosure wall 111a, the fourth enclosure wall 111d, and the distal section of the second enclosure wall 111b. For example, the ramp section 1113 can be provided corresponding to the most distal molar.

[0093] The slope segment 1113 shows an increasing trend along the first direction, which is the direction from far to near.

[0094] "The slope segment 1113 shows an increasing trend along the first direction" means that the slope segment 1113 has a height H in the vertical direction. The first height H1 at the relatively far-middle position is less than the second height H2 at the relatively near-middle position. The height H shows an increasing trend in the direction from the far-middle to the near-middle.

[0095] The ramp section 1113 can be seen as being formed by cutting off a portion of the distal side of the first part 111, and the ramp section 1113 retains part of the fourth enclosure wall 111d, the height of which is lower than the height of the first enclosure wall 111a and the second enclosure wall 111b. The ramp section 1113 further reduces the difficulty of demolding.

[0096] Optionally, the proximal end face 1121 of the third enclosure 112c has an acute angle α facing the distal side between it and the first engagement surface A1. The design of the acute angle α can further reduce the difficulty of demolding.

[0097] Optional, continue to combine Figures 5 to 8 In the posterior region, the first occlusal surface A1 matches the occlusal surface of the first jaw. The first occlusal surface A1 in the posterior region has an anatomical shape that matches the occlusal surface of the first jaw, which can improve the coverage of the first orthodontic appliance 100 on the first jaw.

[0098] The first upper surface 212 of the protrusion 21 in the posterior tooth region, which is far from the second occlusal surface A2, is completely matched with the first occlusal surface A1 in the posterior tooth region, that is, the first upper surface 212 also has an anatomical shape.

[0099] The first part 111 of the groove 11 exposes the first occlusal surface A1 of the posterior tooth region. When the protrusion 21 and the first part 111 of the posterior tooth region cooperate with each other, the first upper end surface 212 of the protrusion 21 is fully matched with the first occlusal surface A1 of the posterior tooth region, which can improve the stability of the cooperation between the protrusion 21 and the first part 111.

[0100] Optionally, in the anterior region, the first occlusal surface A1 matches the lingual surface of the first occlusion, which can improve the coverage of the first appliance 100 on the first occlusion.

[0101] "First occlusal surface A1" refers to the surface that matches the occlusal surface of the posterior teeth in the posterior tooth region, and the surface that matches the lingual surface of the anterior teeth in the anterior tooth region. The occlusal surface of the posterior teeth and the lingual surface of the anterior teeth are more suitable for installing the groove 11.

[0102] There is a gap between the second upper end face 213 of the protrusion 21, which is away from the second occlusal surface A2, and the first occlusal surface A1, and there is also a gap between the protrusion 21 and the anterior teeth. The gap can be seen as being achieved by thinning a portion of the corresponding anterior tooth area of ​​the protrusion 21. The gap setting can avoid interference between the protrusion 21 and the anterior teeth. The gap setting can also create a breathing opening in the anterior tooth area, improving the patient's wearing comfort.

[0103] Optionally, when the first orthodontic appliance 100 and the second orthodontic appliance 200 are in occlusal position, a through hole K is formed between the first appliance body 10 and the second appliance body 200 in the anterior region, connecting the labial and lingual sides. The through hole K can serve as a breathing port, thereby improving the patient's wearing comfort.

[0104] In the anterior region, the first appliance body 10 can be matched with the anterior teeth of the first jaw, and the second appliance body 20 can be matched with the anterior teeth of the second jaw. When the first appliance 100 and the second appliance 200 are in occlusal, a gap is formed between the first appliance body 10 and the second appliance body 20, which is the through hole K connecting the labial and lingual sides.

[0105] Alternatively, a through hole K communicating with the lip and tongue sides may be additionally provided at the first orthodontic appliance body 10 and / or the second orthodontic appliance body 20.

[0106] Optionally, in the posterior region, the second occlusal surface A2 matches the occlusal surface of the second occlusion. The second occlusal surface A2 in the posterior region has an anatomical shape that matches the occlusal surface of the second occlusion, which can improve the coverage of the second appliance 200 on the second occlusion.

[0107] The groove 11 (i.e., the first part 111) in the posterior tooth region has a third upper end surface 113 that is far from the first occlusal surface A1 and is completely matched with the second occlusal surface A2, that is, the third upper end surface 113 also has an anatomical structure.

[0108] When the protrusion 21 mates with the first part 111 of the posterior tooth region, the third upper end face 113 of the first part 111 is fully matched with the second occlusal surface A2 of the periphery of the protrusion 21, which can improve the stability of the mating between the protrusion 21 and the first part 111.

[0109] In other embodiments, when the first orthodontic appliance 100 and the second orthodontic appliance 200 are in occlusal position, in the posterior tooth region, there is a gap between the third upper end face 113 of the groove 11 (i.e., the first portion 111) away from the first occlusal surface A1 and the second occlusal surface A2. The portion of the protrusion 21 away from the second occlusal surface A2 is confined within the first portion 111, while the portion of the protrusion 21 connecting to the second occlusal surface A2 is exposed outside the first portion 111.

[0110] In other words, when the first orthodontic appliance 100 and the second orthodontic appliance 200 are in occlusion, on the buccal and lingual sides of the posterior teeth, a portion of the protrusion 21 is exposed in the area between the groove 11 and the second occlusal surface A2. When viewed on the buccal and lingual sides, the protrusion 21 can be seen on the side of the first portion 111 near the second occlusal surface A2 (above or below the first portion 111), and this portion of the protrusion 21 does not extend into the interior of the first portion 111.

[0111] At at least one location in the posterior tooth region, the height of the protrusion 21 is greater than the height of the groove 11. The first occlusal surface A1 matches the occlusal surface of the first tooth, and the open bite height of the orthodontic appliance assembly 300 is determined by the height of the protrusion 21. The height of the protrusion 21 can be designed according to the required open bite height of the orthodontic appliance assembly 300.

[0112] The advantages of the height of the protrusion 21 being greater than the height of the groove 11 are: (1) The groove 11 is a recessed structure. This structural characteristic determines that in the hot-pressing film forming process, the film thickness of some or all areas of the groove 11 will be relatively low, affecting the forming quality. Making the height of the groove 11 relatively low can avoid the film thickness of the groove 11 being too low and affecting the forming quality; (2) The higher the height, the more serious the adhesion problem. Making the height of the groove 11 relatively low can reduce the possibility of adhesion; (3) The groove 11 includes a first part 111 and a second part 112 that are separated from each other on the buccal and lingual sides. When the height of the groove 11 is too high, it will affect the strength of the first part 111 and the second part 112. The protrusion 21 is a continuous structure. When the height of the protrusion 21 is relatively high, it will not affect the overall strength of the protrusion 21 too much; (4) The height of the protrusion 21 is higher, so the protrusion 21 can be used to support the bite. The higher protrusion 21 can accommodate more opening bite height, that is, the opening bite height is determined by the protrusion 21.

[0113] Optionally, the maximum height of the protrusion 21 is greater than the maximum height of the groove 11. In this case, the portion of the protrusion 21 away from the second occlusal surface A2 is confined within the first portion 111, while the portion of the protrusion 21 connecting to the second occlusal surface A2 is exposed outside the first portion 111. The gap between the first occlusal surface A1 and the second occlusal surface A2 can be defined by the maximum height of the protrusion 21.

[0114] The groove 11 includes a first portion 111 and a second portion 112 that are separated from each other on the buccal and lingual sides. If the height of the groove 11 is too high, it will affect the strength of the first portion 111 and the second portion 112. The protrusion 21 is a continuous structure, and if the height of the protrusion 21 is relatively high, it will not significantly affect the overall strength of the protrusion 21.

[0115] Optionally, when the first orthodontic appliance 100 and the second orthodontic appliance 200 are in occlusion, the gap between the first occlusal surface A1 and the second occlusal surface A2 in the posterior tooth region shall not exceed 7 mm, but is not limited thereto.

[0116] Optionally, the protrusion 21 includes a first segment 214, a second segment 215, and a third segment 216 connected in sequence. The first segment 214 matches the first part 111, the third segment 216 matches the second part 112, and the second segment 215 is exposed on the outside of the groove 11.

[0117] The first segment 214 cooperates with the first part 111 to provide a limiting function, and the third segment 216 cooperates with the second part 112 to provide a limiting function. The second segment 215 does not cooperate with the groove 11. The fourth upper end surface 217 of the second segment 215, which is away from the second occlusal surface A2, may have an anatomical structure. When the protrusion 21 cooperates with the first part 111 in the posterior tooth area, the fourth upper end surface 217 of the protrusion 21 is completely matched with the first occlusal surface A1 outside the first part 111, which can further improve the stability of the cooperation between the groove 11 and the protrusion 21.

[0118] The end face of the first segment 214 furthest from the second occlusal surface A2 is the first upper end face 212; the end face of the second segment 215 furthest from the second occlusal surface A2 is the fourth upper end face 217; and the end face of the third segment 216 furthest from the second occlusal surface A2 is the second upper end face 213. The first upper end face 212, the fourth upper end face 217, and the second upper end face 213 are connected in sequence to form the entire upper end face of the protrusion 21. The entire upper end face has an anatomical structure corresponding to the posterior tooth region and matches with the first occlusal surface A1 of the posterior tooth region to improve the stability of the fit. The region corresponding to the anterior tooth region has a gap with the anterior tooth region to avoid interference with the anterior teeth.

[0119] Optionally, the width of the second segment 215 in the buccal-lingual direction is smaller than the width of the first segment 214 in the buccal-lingual direction. That is, a part of the protrusion 21 is recessed, which can prevent the volume of the second cavity S2' formed by the entire protrusion 21 from being too large and affecting the overall strength.

[0120] Optionally, the outer contour of the protrusion 21 is converging along a second direction, which is the direction away from the second occlusal surface A2. The cross-sectional area of ​​the protrusion 21 decreases in the second direction.

[0121] The second distal end face 211 of the protrusion 21 forms an acute angle toward the mesial side with the second occlusal surface A2. The mesial end face, buccal side, and lingual side of the protrusion 21 may also form an acute angle toward the second cavity S2' with the second occlusal surface A2, depending on the actual situation.

[0122] The protrusion 21 is in a gathered shape, which facilitates the demolding of the protrusion 21 and improves the overall strength of the protrusion 21. When the protrusion 21 is in a gathered shape, the opening diameter of the groove 11 can be appropriately increased so that the protrusion 21 can smoothly enter the groove 11.

[0123] Below, in conjunction with the aforementioned description of the groove 11 and the protrusion 21, and... Figures 9 to 13 This section introduces the specific forms of the first limiting structure 12 and the second limiting structure 22.

[0124] Optional, combined Figure 9 The first limiting structure 12 includes a first protruding ridge 121 that connects at least one of the first enclosure wall 111a and the second enclosure wall 111b, and the first protruding ridge 121 protrudes toward the interior of the groove 11. The first protruding ridge 121 connects to the end of at least one of the first enclosure wall 111a and the second enclosure wall 111b away from the first engagement surface A1.

[0125] Here, we take the first limiting structure 12, which includes two first protrusions 121, as an example. One of the first protrusions 121 is connected to the end of the first surrounding wall 111a away from the first occlusal surface A1 and extends toward the lingual side. The other first protrusion 121 is connected to the end of the second surrounding wall 111b away from the first occlusal surface A1 and extends toward the buccal side.

[0126] The first protruding ridge 121 is connected to the first enclosure wall 111a to form an "L" shaped structure, and the first protruding ridge 121 is connected to the second enclosure wall 111b to form an "L" shaped structure.

[0127] When the height of the fourth enclosure wall 111d is sufficient, a first protruding ridge 121 can also be formed at the fourth enclosure wall 111d.

[0128] Combination Figure 10 The second limiting structure 22 includes a second protruding ridge 221 connecting the protrusion 21. The second protruding ridge 221 protrudes towards the cheek and tongue side, and the first protruding ridge 121 and the second protruding ridge 221 cooperate with each other.

[0129] The second protrusion 221 connects to the end of the protrusion 21 away from the second occlusal surface A2. When the first orthodontic appliance 100 and the second orthodontic appliance 200 are in the occlusal state, the first protrusion 121 and the second protrusion 221 are locked together, and the second protrusion 221 is sandwiched between the inner surface of the first protrusion 121 near the first occlusal surface A1 and the first occlusal surface A1.

[0130] Optionally, the outer surface 1211 of the first ridge 121 away from the first occlusal surface A1 may be flush with the third upper end surface 113 of the first part 111, and the outer surface 1211 of the first ridge 121 may also have an anatomical structure that is completely matched with the second occlusal surface A2.

[0131] Here, "level" means roughly at the same height.

[0132] In other embodiments, there may also be a gap between the outer surface 1211 of the first protrusion 121 and the second engagement surface A2, and the outer surface 1211 of the first protrusion 121 may be a plane.

[0133] Optionally, the outer surface 2211 of the second protrusion 221 away from the second engagement surface A2 may be flush with the first upper end surface 212 of the protrusion 21.

[0134] Here, "level" means roughly at the same height.

[0135] Optional, combined Figure 10 The first limiting structure 12 also includes a protrusion 122 connecting the end of the third enclosure wall 112c away from the first occlusal surface A1, with the protrusion 122 protruding toward the distal side. The third enclosure wall 112c and the protrusion 122 are connected to form an "L"-shaped structure.

[0136] Combination Figure 11 and Figure 12 The second limiting structure 22 also includes a recess 218 located near the middle surface of the protrusion 21, and the protrusion 122 and the recess 218 cooperate with each other.

[0137] There is a gap between the recess 218 and the second occlusal surface A2. The recess 218 does not extend to the second occlusal surface A2. The recess 218 and the second occlusal surface A2 are spaced apart.

[0138] When the first orthodontic appliance 100 and the second orthodontic appliance 200 are in occlusion, the opening occlusion height of the anterior teeth area is greater than that of the posterior teeth area, raising the position of the concave 218 to accommodate the height of the protrusion 122.

[0139] Optional, combined Figure 10 and Figure 11 The orthodontic appliance assembly 300 also includes at least one connecting plate 30, which connects to the labial or lingual side of the third enclosure 112c and the protrusion 122, and / or the connecting plate 30 connects to the labial or lingual side of the recess 218. The connecting plate 30 is provided to prevent wrinkles from forming at the third enclosure 112c, the protrusion 122 and / or the recess 218.

[0140] When the connecting plate 30 is connected to the lip or tongue side of the recess 218, the side of the recess 218 away from the connecting plate 30 is open, which makes it easy for the protrusion 122 to enter the recess 218.

[0141] Taking the connecting plate 30 located on the lip side of the third enclosure wall 112c and the protrusion 122 as an example. When there is no connecting plate 30 (i.e., only the "L"-shaped structure formed by the third enclosure wall 112c and the protrusion 122), during the hot-press molding process, due to the natural drooping of the hot-press film, the hot-press films on the lip and tongue sides tend to converge in the middle area of ​​the third enclosure wall 112c, forming wrinkles. When the connecting plate 30 is provided, the hot-press film on the lip side is blocked by the connecting plate 30 during the drooping process, and the hot-press film on the cheek side extends all the way to the connecting plate 30, thus avoiding the formation of wrinkles in the middle area of ​​the third enclosure wall 112c. Therefore, by providing the connecting plate 30 on one side of the third enclosure wall 112c and the protrusion 122, wrinkles can be moved to the area of ​​the connecting plate 30, thus avoiding the formation of wrinkles at the third enclosure wall 112c.

[0142] The connection between the connecting plate 30 and the third enclosure wall 112c is smooth, and the connection between the connecting plate 30 and the protrusion 122 is smooth, which avoids damage to the hot-press film caused by sharp bending, and also avoids stress concentration at the corner.

[0143] The connecting plate 30 is located on the lip side of the third enclosure wall 112c and the protrusion 122, and can also prevent the protrusion 21 from moving toward the lip side.

[0144] The explanation of how to avoid wrinkles when setting the connecting plate 30 at the recess 218 can be found in the above description, and will not be repeated here.

[0145] Optionally, at least one connecting plate 30 includes a first connecting plate 30a and a second connecting plate 30b. The first connecting plate 30a connects to the lip side of the third enclosure wall 112c and the protrusion 122, and the second connecting plate 30b connects to the tongue side of the recess 218. The tongue side of the third enclosure wall 112c and the protrusion 122 are openings, and the lip side of the recess 218 is also an opening.

[0146] Alternatively, the first connecting plate 30a connects to the tongue side of the third enclosure wall 112c and the protrusion 122, and the second connecting plate 30b connects to the lip side of the recess 218. The lip side of the third enclosure wall 112c and the protrusion 122 are openings, and the tongue side of the recess 218 is an opening.

[0147] The cooperation of the first connecting plate 30a and the second connecting plate 30b can further restrict the relative movement of the first orthodontic appliance 100 and the second orthodontic appliance 200 in the lip and tongue direction.

[0148] Combination Figure 13When wearing the orthodontic appliance assembly 300, the first orthodontic appliance 100 can be worn on the first jaw, and the second orthodontic appliance 200 can be worn on the second jaw. The protrusion 21 in the posterior tooth area is pre-positioned with the first part 111 of the groove 11, but the protrusion 21 is not fully inserted into the first part 111. Then, the protrusion 21 in the anterior tooth area is fitted with the second part 112, and then the protrusion 21 in the posterior tooth area is fitted with the first part 111.

[0149] In summary, this utility model connects the first orthodontic appliance 100 and the second orthodontic appliance 200 through the groove 11 and the protrusion 21. The groove 11 includes a first part 111 and a second part 112 that are disconnected from each other on the cheek side and the tongue side. The groove 11 is not a completely continuous structure, which facilitates the protrusion 21 to enter the groove 11 and achieve positioning.

[0150] The groove 11 and protrusion 21 of this invention are located on the first occlusal surface A1 and the second occlusal surface A2, respectively. When the patient wears the orthodontic appliance assembly 300, the groove 11 and protrusion 21 will not interfere with the lip and cheek muscles, which can greatly improve the patient's experience.

[0151] 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.

[0152] The detailed descriptions listed above are merely specific descriptions of feasible implementations of this utility model, and are not intended to limit the scope of protection of this utility model. All equivalent implementations or modifications made without departing from the spirit of this utility model should be included within the scope of protection of this utility model.

Claims

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

2. The appliance assembly of claim 1, wherein, The first part is entirely located in the posterior tooth region, and the second part is entirely located in the anterior tooth region.

3. The appliance assembly of claim 1, wherein, The first part includes a first perimeter and a second perimeter located on the buccal and lingual sides of the first occlusal surface, respectively. The second part is located on the mesial side of the first part and includes a third perimeter extending along the labial and lingual direction.

4. The appliance assembly of claim 3, wherein, The lengths of the first enclosure and the second enclosure are approximately equal in the near-to-far direction.

5. The appliance assembly of claim 3, wherein, The first part further includes a fourth enclosure connecting the first enclosure and the second enclosure, the fourth enclosure extending in the buccal-lingual direction and located on the distal side of the first enclosure and the second enclosure.

6. The appliance assembly of claim 5, wherein, The fourth wall smoothly transitions to the cheek side of the first wall, and the fourth wall smoothly transitions to the tongue side of the second wall.

7. The appliance assembly of claim 5, wherein, The first portion includes a sloping section on the distal side that extends to the fourth enclosure wall and the sloping section has an increasing trend along a first direction, which is the direction from the distal to the near side.

8. The appliance assembly of claim 3, wherein, The proximal end face of the third enclosure has an acute angle toward the distal side between it and the first occlusal face.

9. The appliance assembly of claim 1, wherein, In the posterior tooth region, the first occlusal surface matches the occlusal surface of the first jaw, and the first upper surface of the protrusion, which is away from the second occlusal surface, completely matches the first occlusal surface.

10. The appliance assembly of claim 1, wherein, In the anterior region, the first occlusal surface matches the lingual surface of the first jaw, and the second upper end face of the protrusion, which is away from the second occlusal surface, has a gap with the first occlusal surface.

11. The appliance assembly of claim 1, wherein, In the posterior region, the second occlusal surface matches the occlusal surface of the second jaw, and the third upper end face of the groove, which is away from the first occlusal surface, completely matches the second occlusal surface.

12. The appliance assembly of claim 1, wherein, The protrusion includes a first segment, a second segment, and a third segment connected in sequence. The first segment matches the first part, the third segment matches the second part, the second segment is exposed outside the groove, and the width of the second segment in the buccal-lingual direction is smaller than the width of the first segment in the buccal-lingual direction.

13. The appliance assembly of claim 1, wherein, The outer contour of the protrusion is converging along a second direction, which is the direction away from the second occlusal surface.

14. The appliance assembly of claim 1, wherein, The second part corresponds to at least one of the settings for teeth 2-4.

15. The appliance assembly of claim 1, wherein, At at least one location in the posterior tooth region, the height of the protrusion is greater than the height of the groove.

16. The appliance assembly of claim 1, wherein, When the first orthodontic appliance and the second orthodontic appliance are in occlusion, on the buccal and lingual sides of the posterior teeth, a portion of the protrusion is exposed in the area between the groove and the second occlusal surface.

17. The appliance assembly of claim 1, wherein, When the first orthodontic appliance and the second orthodontic appliance are in occlusion, in the posterior tooth region, there is a gap between the third upper end face of the groove away from the first occlusal surface and the second occlusal surface.

18. The appliance assembly of claim 1, wherein, In the posterior region, the first occlusal surface matches the occlusal surface of the first jaw, and the opening occlusal height of the orthodontic appliance assembly is determined by the height of the protrusion.

19. The orthodontic appliance assembly according to claim 1, characterized in that, When the first orthodontic appliance and the second orthodontic appliance are in occlusal position, the gap between the first occlusal surface and the second occlusal surface in the posterior tooth region is no greater than 7 mm.

20. The appliance assembly of claim 1, wherein, When the first orthodontic appliance and the second orthodontic appliance are in occlusion, a through hole is formed between the body of the first orthodontic appliance and the body of the second orthodontic appliance in the anterior teeth area, connecting the labial and lingual sides.

21. The appliance assembly of claim 1, wherein, The groove is integrally formed with the first orthodontic appliance body, the first orthodontic appliance body forms a first cavity to accommodate the first jaw, and the groove forms a first cavity communicating with the first cavity; the protrusion is integrally formed with the second orthodontic appliance body, the second orthodontic appliance body forms a second cavity to accommodate the second jaw, and the protrusion forms a second cavity communicating with the second cavity.

22. The appliance assembly of claim 1, wherein, The first orthodontic appliance further includes a first limiting structure connecting the groove, and the second orthodontic appliance further includes a second limiting structure connecting the protrusion. When the first orthodontic appliance and the second orthodontic appliance are in an occlusal state, the first limiting structure and the second limiting structure cooperate with each other to restrict the first orthodontic appliance and the second orthodontic appliance from moving relative to each other in the vertical direction.

23. The appliance assembly of claim 22, wherein, The first part includes a first perimeter wall and a second perimeter wall located on the buccal and lingual sides of the first occlusal surface, respectively. The first limiting structure includes a first protruding ridge connecting at least one of the first perimeter wall and the second perimeter wall. The first protruding ridge protrudes toward the interior of the groove. The second limiting structure includes a second protruding ridge connecting the protrusion. The second protruding ridge protrudes toward the buccal and lingual sides. The first protruding ridge and the second protruding ridge cooperate with each other.

24. The appliance assembly of claim 23, wherein, The first convex ridge connects to at least one of the first enclosure wall and the second enclosure wall at an end away from the first occlusal surface, and the second convex ridge connects to the end of the protrusion away from the second occlusal surface. When the first orthodontic appliance and the second orthodontic appliance are in an occlusal state, the second convex ridge is sandwiched between the inner surface of the first convex ridge near the first occlusal surface and the first occlusal surface.

25. The appliance assembly of claim 22, wherein, The second part includes a third perimeter extending along the buccal-lingual direction, the first limiting structure includes a protrusion connecting one end of the third perimeter away from the first occlusal surface, the protrusion protruding toward the distal side, and the second limiting structure includes a recess located on the proximal surface of the protrusion, the protrusion and the recess cooperating with each other.

26. The appliance assembly of claim 25, wherein, There is a gap between the recess and the second occlusal surface.

27. The appliance assembly of claim 25, wherein, The orthodontic assembly further includes at least one connecting plate that connects the third enclosure and the labial or lingual side of the protrusion, and / or the connecting plate connects the labial or lingual side of the recess.

28. The appliance assembly of claim 27, wherein, When the connecting plate connects to the lip or tongue side of the recess, the side of the recess away from the connecting plate is an opening.

29. The appliance assembly of claim 27, wherein, At least one connecting plate includes a first connecting plate and a second connecting plate, wherein the first connecting plate connects the third enclosure wall and the lip side of the protrusion, and the second connecting plate connects the tongue side of the recess; or, the first connecting plate connects the third enclosure wall and the tongue side of the protrusion, and the second connecting plate connects the lip side of the recess.

30. The appliance assembly of claim 22, wherein, The groove is integrally formed with the first limiting structure, and the first cavity formed by the groove is interconnected with the first chamber formed by the first limiting structure; the protrusion is integrally formed with the second limiting structure, and the second cavity formed by the protrusion is interconnected with the second chamber formed by the second limiting structure.

31. The appliance assembly of any one of claims 1-30, wherein, The orthodontic appliance assembly includes a first hemi-maxillary region and a second hemi-maxillary region located on both sides of the dental midline, and two sets of retention groups located in the first hemi-maxillary region and the second hemi-maxillary region respectively. Each retention group includes the groove and the protrusion that cooperate with each other, and the two sets of retention groups are symmetrically arranged with respect to the dental midline.

32. The appliance assembly of any one of claims 1-30, wherein, The first orthodontic appliance is integrally formed by a hot-press molding process, and the second orthodontic appliance is integrally formed by a hot-press molding process.

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