Orthodontic appliance kit for skeletal class iii malocclusion in adolescents

Abstract

The utility model provides a kind of appliance kit for adolescent bone Ⅲ class malocclusion deformity, the conception is in to set the appliance of three stages use respectively, each stage appliance includes upper and lower jaw mouthguard, set on the upper jaw mouthguard of first stage anterior tooth area labial side reinforcing rib, front traction hook, molar area Ⅲ class traction hook and posterior tooth area palatal cross bar;Set on the lower jaw mouthguard of first stage deciduous molar area open structure and anterior tooth area Ⅲ class traction hook;Set on the upper jaw mouthguard of second stage upper jaw anterior tooth area open structure, upper jaw anterior tooth area open structure includes upper jaw anterior tooth area lingual side reinforcing rod, upper jaw anterior tooth area lingual side reinforcing rod abuts upper jaw anterior tooth and to its exert pressure;Set on the lower jaw mouthguard of second stage lower jaw anterior tooth area open structure, lower jaw anterior tooth area open structure includes lower jaw anterior tooth area labial side reinforcing rod, lower jaw anterior tooth area labial side reinforcing rod abuts lower jaw anterior tooth and to its exert pressure;Third stage appliance is used for the fine adjustment of tooth.

Description

Technical Field

[0001] This utility model relates to the field of orthodontics, specifically to an orthodontic appliance kit for skeletal Class III malocclusion in adolescents. Background Technology

[0002] In the field of orthodontics, skeletal Class III malocclusion in adolescents is a common jaw developmental abnormality. Its clinical manifestations include insufficient maxillary development in both sagittal and transverse directions, excessive mandibular development, and anterior crossbite. This type of malocclusion not only affects the patient's facial aesthetics and occlusal function, but may also lead to temporomandibular joint disorder and decreased chewing efficiency due to long-term abnormal jaw interference. Early intervention during the adolescent growth and development period is suitable.

[0003] Currently, the non-surgical treatment strategy for mild to moderate skeletal Class III malocclusion mainly relies on maxillary expansion combined with anterior traction therapy. This approach promotes the growth and remodeling of the maxilla in the sagittal and transverse directions, improves maxillary retrusion, and at the same time uses anterior traction to change the relative positional relationship between the maxilla and mandible, and to a certain extent inhibits the excessive anterior growth of the mandible, thereby achieving a benign remodeling of the skeletal relationship.

[0004] Currently, traditional orthodontic appliances typically add anterior traction hooks to the maxillary Hyrax or Hass spiral expander, using elastic bands to connect the traction hooks to the anterior traction mask. This promotes sagittal and lateral development of the maxilla while using the chin cup of the mask to appropriately inhibit mandibular anterior growth. Because the intraoral device of the appliance is a large metal structure, it easily causes patient discomfort and cannot achieve synchronous, gradual tooth alignment. The chin cup has limited effect in inhibiting mandibular anterior growth, and there are no other intraoral devices to enhance the control of the mandibular arch.

[0005] In addition, some clear aligners have anterior traction added. From a skeletal perspective, clear aligners are softer than stainless steel and cannot have enough rigidity to generate good orthodontic force transmission. From a dental perspective, due to the limited step distance of full-coverage aligners, the process of correcting anterior crossbite is slow, and the upper and lower anterior teeth collide severely during the correction process, resulting in open bite of the posterior teeth, which greatly affects chewing and eating over a long period of time. Full-coverage aligners have greater friction and cannot achieve efficient overall distal movement of the lower dentition through force transmission effect to reserve space for rapid movement to correct anterior crossbite. Utility Model Content

[0006] In view of the problems in the prior art, the present invention provides an orthodontic appliance kit for skeletal Class III malocclusion in adolescents, the orthodontic appliance kit comprising:

[0007] The first stage orthodontic appliance includes a first maxillary brace and a first mandibular brace. The first maxillary brace is equipped with a labial reinforcement in the anterior region, an anterior traction hook, a Class III traction hook in the molar region, and a palatal crossbar in the first posterior region. The first mandibular brace is equipped with a hollow structure in the deciduous molar region and a Class III traction hook in the anterior region.

[0008] The second-stage orthodontic appliance includes a second maxillary brace and a second mandibular brace. The second maxillary brace has a hollow structure in the maxillary anterior region, which includes a lingual reinforcing bar that abuts against the maxillary anterior teeth and applies pressure thereto. The second mandibular brace has a hollow structure in the mandibular anterior region, which includes a labial reinforcing bar that abuts against the mandibular anterior teeth and applies pressure thereto.

[0009] The third-stage orthodontic appliance, comprising a third maxillary brace and a third mandibular brace, is used for fine adjustment of tooth position.

[0010] Furthermore, the first maxillary brace includes a gingival wrapping portion in the anterior region, and the anterior traction hook is disposed in the gingival wrapping portion in the anterior region.

[0011] Furthermore, the hollow structure in the deciduous molar region includes connecting rods respectively disposed on the buccal and lingual sides of the mandibular deciduous molars, with both ends of the connecting rods respectively connected to the dental crowns that wrap around the front and back teeth of the deciduous molars.

[0012] Furthermore, the hollow structure in the maxillary anterior region also includes a labial buffer bar in the maxillary anterior region, which is used to form a buffer space with the labial tooth surface of the maxillary anterior teeth.

[0013] Furthermore, the hollow structure in the mandibular anterior region also includes a lingual buffer bar in the mandibular anterior region, which is used to form a buffer space with the lingual tooth surface of the mandibular anterior teeth.

[0014] Furthermore, the second-stage orthodontic appliance is equipped with a Class III traction hook.

[0015] Furthermore, the second maxillary brace also includes a palatal crossbar in the second posterior tooth region.

[0016] Furthermore, the third maxillary brace is also provided with a palatal crossbar in the third posterior tooth region.

[0017] Furthermore, the orthodontic kit also includes a traction mask that engages with the front traction hook.

[0018] This utility model also provides a design method for an orthodontic appliance kit for skeletal Class III malocclusion in adolescents. The design method includes three stages of appliance use, each stage comprising maxillary and mandibular braces.

[0019] The first-stage orthodontic appliance consists of a labial reinforcement for the anterior teeth, an anterior traction hook, a Class III traction hook for the molars, and a palatal bar for the posterior teeth. The first-stage orthodontic appliance consists of a hollow structure for the deciduous molars and a Class III traction hook for the anterior teeth.

[0020] A hollow structure for the maxillary anterior teeth region is provided on the maxillary braces of the second-stage orthodontic appliance. The hollow structure for the maxillary anterior teeth region includes a lingual reinforcing bar for the maxillary anterior teeth region, which abuts against the maxillary anterior teeth and applies pressure to them. A hollow structure for the mandibular anterior teeth region is provided on the mandibular braces of the second-stage orthodontic appliance. The hollow structure for the mandibular anterior teeth region includes a labial reinforcing bar for the mandibular anterior teeth region, which abuts against the mandibular anterior teeth and applies pressure to them.

[0021] The third-stage appliance is designed for fine-tuning the position of the teeth.

[0022] This invention relates to an orthodontic appliance kit for skeletal Class III malocclusion in adolescents, based on a three-stage targeted treatment concept. In the first stage, efficient orthodontic forces are transmitted through a palatal bar in the posterior region, reinforcing ribs in the maxillary anterior region, and anterior traction hooks to promote sagittal and lateral maxillary development. In the second stage, a hollowed-out device with a conforming and buffering tooth surface design achieves efficient distalization of the mandibular arch and rapid correction of anterior crossbite. The third stage involves final fine-tuning of the teeth through conventional orthodontic treatment. This appliance kit is simple in structure, practical, convenient, comfortable, and safe to wear, and is beneficial for guiding efficient growth improvement and correcting crossbite in mild to moderate skeletal Class III malocclusion.

[0023] The following will further explain the concept, specific structure and technical effects of this utility model in conjunction with the accompanying drawings, so as to fully understand the purpose, features and effects of this utility model. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the structure of the first maxillary aligner of the first stage orthodontic appliance kit for skeletal Class III malocclusion in adolescents, according to an embodiment of the present invention.

[0025] Figure 2 yes Figure 1 A structural diagram of the first maxillary braces from another perspective;

[0026] Figure 3This is a schematic diagram of the first mandibular aligner of the first stage orthodontic appliance kit for skeletal Class III malocclusion in adolescents, according to an embodiment of the present invention.

[0027] Figure 4 yes Figure 3 A structural diagram of the first mandibular brace from another perspective;

[0028] Figure 5 This is a schematic diagram of the second maxillary aligner of the second-stage orthodontic appliance kit for skeletal Class III malocclusion in adolescents, according to one embodiment of this utility model.

[0029] Figure 6 yes Figure 5 Another structural diagram of the second maxillary braces

[0030] Figure 7 This is a schematic diagram of the second mandibular aligner of the second-stage orthodontic appliance kit for skeletal Class III malocclusion in adolescents, according to an embodiment of the present invention.

[0031] Figure 8 yes Figure 7 A structural diagram of the second mandibular brace from another perspective.

[0032] Explanation of reference numerals in the attached figures:

[0033] 110—First maxillary brace;

[0034] 111—Groove;

[0035] 112—Reinforcing rib;

[0036] 113—Gingival wrapping of the anterior teeth region;

[0037] 114—Front towing hook;

[0038] 115—Palatal transverse bar in the posterior tooth region;

[0039] 116—Class III traction hook for the molar region;

[0040] 117—Fixed groove;

[0041] 120—First mandibular brace;

[0042] 121—Groove;

[0043] 122, 123 — Connecting rods;

[0044] 124—Class III traction hook for the anterior teeth region;

[0045] 125—Fixed groove;

[0046] 210—Second maxillary brace;

[0047] 211—Groove;

[0048] 212—Labial buffer bar in the maxillary anterior region;

[0049] 213—Lingual reinforcement bar in the maxillary anterior region;

[0050] 214—Fixed groove;

[0051] 215—Palatal transverse bar in the posterior tooth region;

[0052] 216—Class III traction hook for the molar region;

[0053] 220—Second mandibular brace;

[0054] 221—groove;

[0055] 222—Lingual buffer bar in the mandibular anterior region;

[0056] 223—Labial reinforcement bar in the mandibular anterior region;

[0057] 224—Fixed groove. Detailed Implementation

[0058] In the description of the embodiments of this utility model, it should be understood that the terms "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the utility model. The accompanying drawings are schematic diagrams or conceptual diagrams, and the relationships between the thickness and width of each part, as well as the proportional relationships between each part, etc., are not entirely consistent with their actual values.

[0059] The main design concept of this utility model for an orthodontic appliance kit for skeletal Class III malocclusion in adolescents is that it includes three stages of appliances, each stage comprising maxillary and mandibular braces. Specifically, it includes:

[0060] The first-stage orthodontic appliance consists of a labial reinforcement for the anterior teeth, an anterior traction hook, a Class III traction hook for the molars, and a palatal bar for the posterior teeth. The first-stage orthodontic appliance consists of a hollow structure for the deciduous molars and a Class III traction hook for the anterior teeth.

[0061] A hollow structure for the maxillary anterior region is set on the maxillary braces of the second-stage orthodontic appliance. The hollow structure for the maxillary anterior region includes a lingual reinforcing bar for the maxillary anterior region, which abuts against the maxillary anterior teeth and applies pressure to them. A hollow structure for the mandibular anterior region is set on the mandibular braces of the second-stage orthodontic appliance. The hollow structure for the mandibular anterior region includes a labial reinforcing bar for the mandibular anterior region, which abuts against the mandibular anterior teeth and applies pressure to them.

[0062] The third stage of orthodontic treatment can use conventional clear aligners for fine-tuning of tooth position.

[0063] Thus, the first-stage orthodontic appliance efficiently transmits orthodontic force to promote the sagittal and lateral development of the maxilla. The second-stage orthodontic appliance, especially with the assistance of Class III traction, can achieve low-friction, efficient distal movement of the lower dentition and rapid relief of anterior crossbite. The third-stage orthodontic appliance is used for the final fine adjustment of the teeth.

[0064] The orthodontic appliance kit for skeletal Class III malocclusion in adolescents in this embodiment includes three types of appliances used sequentially in three stages throughout the orthodontic treatment process: a first-stage appliance, a second-stage appliance, and a third-stage appliance. Each stage appliance includes maxillary braces and mandibular braces.

[0065] Figure 1 and Figure 2 The first maxillary brace 110 of the first-stage orthodontic appliance is shown. Similar to conventional invisible braces, it is provided with grooves 111 corresponding to the maxillary teeth, making it suitable for wrapping and wearing on the maxillary teeth. In this embodiment, the first maxillary brace 110 covers all the maxillary teeth.

[0066] The first maxillary brace 110 has a reinforcing rib 112 on the labial side of the maxillary anterior teeth region, and the position of the reinforcing rib 112 corresponds to the tooth surface of the maxillary anterior teeth. The reinforcing rib 112 is a strip-shaped structure, and its radial dimension is larger than the thickness of the main body of the first maxillary brace 110, thereby enhancing the structural strength at its location.

[0067] The first maxillary brace 110 also wraps around and covers the gingiva on the labial side of the maxillary anterior teeth. Here, the portion of the brace that wraps around and covers the gingiva is defined as the anterior gingival wrap portion 113. An anterior traction hook 114 is provided on the anterior gingival wrap portion 113. The anterior traction hook 114 is used to connect to an external traction mask. Preferably, the anterior traction hook 114 is positioned above the maxillary canines, 1-2 mm away from the gingival margin of the maxillary canines.

[0068] The synergistic effect of the reinforcing rib 112 and the anterior traction hook 114 provides ideal conditions for maxillary anterior traction in conjunction with the external traction mask. It can provide sufficient rigidity to generate the expected orthopedic force transmission, thereby achieving efficient transmission of orthopedic force through the above structure to promote maxillary sagittal development.

[0069] The first maxillary brace 110 also includes a posterior palatal bar 115 spanning the palate in the maxillary posterior tooth region. The posterior palatal bar 115 is a strip-shaped structure, with a radial dimension greater than the thickness of the main body of the first maxillary brace 110. It acts on the posterior teeth to expand the arch. Specifically, when the first maxillary brace 110 is worn on the maxillary teeth, the posterior palatal bar 115 deforms accordingly, applying a corrective force from the lingual to the buccal side to the posterior teeth on both sides of the posterior palatal bar 115. This effectively transmits the corrective force to promote maxillary lateral development. The posterior palatal bar 115 increases the rigidity of the corresponding area. The number of posterior palatal bars 115 or their radial dimensions can be adjusted according to the needs of arch expansion to provide the expected lateral arch expansion corrective force. Typically, 2 to 3 posterior palatal bars 115 are used.

[0070] The first maxillary brace 110 is also provided with a Class III traction hook 116 for the molar region. The Class III traction hook 116 for the molar region is set on the buccal side corresponding to the position of the first maxillary molar, so as to implement Class III traction.

[0071] The first maxillary brace 110 is also provided with a plurality of retention grooves 117, which can cooperate with the corresponding attachments pasted on the maxillary teeth, so that the first maxillary brace 110 can be securely worn on the maxillary teeth. In this embodiment, the retention grooves 117 are set at positions corresponding to the maxillary canines and the maxillary first molars.

[0072] Figure 3 and Figure 4The first mandibular brace 120 of the first-stage orthodontic appliance is shown. Similar to conventional invisible braces, it is provided with grooves 121 corresponding to the mandibular teeth, making it suitable for wrapping and wearing on the mandibular teeth. In this embodiment, the first mandibular brace 120 does not cover all the teeth of the upper jaw, but is provided with a hollow structure in the deciduous molar area, so that the teeth in the deciduous molar area (i.e., the mandibular first deciduous molar and the mandibular second deciduous molar) are open and exposed and not covered by the brace. The aforementioned hollow structure in the deciduous molar region includes connecting rods 122 and 123 respectively disposed on the buccal and lingual sides of the mandibular deciduous molars. Connecting rods 122 and 123 are strip-shaped structures, and their radial dimensions are greater than the thickness of the main body of the first mandibular dental sleeve 120. The extension direction of connecting rod 122 along its length direction conforms to the outline of the buccal tooth surface of the mandibular deciduous molars, and its two ends are respectively connected to the dental sleeves covering the mandibular canines and mandibular first molars. The extension direction of connecting rod 123 along its length direction conforms to the outline of the lingual tooth surface of the deciduous molars, and its two ends are respectively connected to the dental sleeves covering the canines and first molars.

[0073] The first mandibular brace 120 is also provided with an anterior teeth region Class III traction hook 124, which is set on the labial side corresponding to the canines. It works in conjunction with the first maxillary brace 110 molar region Class III traction hook 116 to implement Class III traction.

[0074] The first mandibular brace 120 is also provided with a plurality of retention grooves 125, which can cooperate with the corresponding attachments pasted on the mandibular teeth, so that the first mandibular brace 120 can be securely worn on the mandibular teeth. In this embodiment, the retention grooves 125 are set at positions corresponding to the mandibular canines and the mandibular first molars.

[0075] The first-stage orthodontic appliance in this embodiment, as can be seen from the structure of the first maxillary brace 110 and the first mandibular brace 120, targets the developmental stage of adolescents. Specifically, at this stage, the first and second deciduous molars in the posterior region have not yet been replaced by permanent teeth, and the second molar has not yet erupted. This is also the preferred time for treatment of skeletal Class III malocclusion in adolescents. The hollow structure of the deciduous molar region of the first mandibular brace 120 reduces the resistance to tooth movement in the posterior region. In synergy with the Class III traction of the first maxillary brace 110, it enables the distal tilting movement of the mandibular canines and the simultaneous distal movement of the entire mandibular posterior teeth. The entire process from the mandibular canines to the mandibular first molars is in contact, thereby achieving efficient distal movement of the corresponding mandibular dentition under the assistance of light Class III traction, leaving sufficient space for the alignment and retraction of the mandibular incisors.

[0076] Figure 5 and Figure 6The second maxillary aligner 210 of the second-stage orthodontic appliance is shown. The second maxillary aligner 210 has grooves 211 corresponding to the maxillary posterior teeth region and a hollow structure for the maxillary anterior teeth region, making it suitable for wrapping around the maxillary posterior teeth and exposing the maxillary anterior teeth. The hollow structure for the maxillary anterior teeth region includes a labial buffer bar 212 and a lingual reinforcing bar 213 respectively located on the labial and lingual sides of the maxillary anterior teeth. The labial buffer bar 212 and the lingual reinforcing bar 213 are strip-shaped structures, and their radial dimension is greater than the thickness of the main body of the second maxillary aligner 210.

[0077] The labial buffer bar 212 of the maxillary anterior region extends along its length direction in accordance with the shape contour of the labial surface of the maxillary anterior teeth. Its two ends are respectively connected to the braces covering the first deciduous molars on both sides of the maxilla. The labial buffer bar 212 of the maxillary anterior region is used to form a buffer space with the labial surface of the maxillary anterior teeth. Since it does not provide orthodontic force to the maxillary anterior teeth, the labial buffer bar 212 of the maxillary anterior region can be set to fit in close contact with the labial surface of the maxillary anterior teeth, or it can be set to have a certain gap with the labial surface of the maxillary anterior teeth, or it can have local contact.

[0078] The lingual reinforcing bar 213 in the maxillary anterior region extends along its length in accordance with the contour of the lingual surface of the maxillary anterior teeth. Its two ends are respectively connected to the braces covering the first deciduous molars on both sides of the maxilla. The lingual reinforcing bar 213 in the maxillary anterior region is used to provide orthodontic force to the maxillary anterior teeth from the lingual to the labial direction. Specifically, when the second maxillary brace 210 is worn on the maxillary teeth, the lingual reinforcing bar 213 in the maxillary anterior region will deform accordingly and abut against the maxillary anterior teeth. Under the action of its restoring force, it applies orthodontic force to the maxillary anterior teeth from the lingual to the labial direction. Preferably, the radial dimension of the lingual reinforcing bar 213 in the maxillary anterior region is greater than the radial dimension of the labial buffer bar 212 in the maxillary anterior region.

[0079] The second maxillary brace 210 is also provided with a plurality of retention grooves 214, which can cooperate with the corresponding attachments pasted on the maxillary teeth, so that the second maxillary brace 210 can be securely worn on the maxillary teeth. In this embodiment, the retention grooves 214 are set at the position corresponding to the first maxillary molar.

[0080] Figure 7 and Figure 8The second mandibular aligner 220 of the second-stage orthodontic appliance is shown. The second mandibular aligner 220 has grooves 221 corresponding to the mandibular posterior teeth region and a hollow structure for the mandibular anterior teeth region, making it suitable for wrapping around the mandibular posterior teeth and exposing the mandibular anterior teeth. The hollow structure for the mandibular anterior teeth region includes a lingual buffer bar 222 and a labial reinforcing bar 223 respectively located on the lingual and labial sides of the mandibular anterior teeth region. The lingual buffer bar 222 and the labial reinforcing bar 223 are strip-shaped structures, and their radial dimension is greater than the thickness of the main body of the second mandibular aligner 220.

[0081] The lingual buffer bar 222 of the mandibular anterior region extends along its length direction in accordance with the shape contour of the lingual tooth surface of the mandibular anterior teeth. Its two ends are respectively connected to the braces covering the first deciduous molars on both sides of the mandible. The lingual buffer bar 222 of the mandibular anterior region is used to form a buffer space with the lingual tooth surface of the mandibular anterior teeth. Since it does not provide orthodontic force to the mandibular anterior teeth, the lingual buffer bar 222 of the mandibular anterior region can be set to fit against the lingual tooth surface of the mandibular anterior teeth, or it can be set to have a certain gap with the lingual tooth surface of the mandibular anterior teeth, or it can have local contact.

[0082] The labial reinforcing bar 223 of the mandibular anterior region extends along its length in accordance with the shape of the labial surface of the mandibular anterior teeth. Its two ends are respectively connected to the braces covering the first deciduous molars on both sides of the mandible. The labial reinforcing bar 223 of the mandibular anterior region is used to provide orthodontic force to the mandibular anterior teeth from the labial side to the lingual side. Specifically, when the second mandibular brace 220 is worn on the mandibular teeth, the labial reinforcing bar 223 of the mandibular anterior region will deform accordingly and abut against the mandibular anterior teeth. Under the action of its restoring force, it applies orthodontic force to the mandibular anterior teeth from the labial side to the lingual side. Preferably, the radial dimension of the labial reinforcing bar 223 of the mandibular anterior region is greater than the radial dimension of the lingual buffer bar 222 of the mandibular anterior region.

[0083] The second mandibular brace 220 is also provided with a plurality of retention grooves 224, which can cooperate with the corresponding attachments pasted on the mandibular teeth, so that the second maxillary brace 220 can be securely worn on the mandibular teeth. In this embodiment, the retention grooves 224 are set at positions corresponding to the maxillary second deciduous molar and the maxillary first molar.

[0084] The second-stage orthodontic appliance of this embodiment can achieve a leapfrog correction of the upper and lower anterior teeth. Preferably, a Class III traction hook 216 for the molar region is provided on the second maxillary brace 210, as shown in the reference. Figure 5 The Class III traction hook 216 in the molar region is set on the buccal side corresponding to the position of the maxillary first molar. It works in conjunction with the implant anchorage screw set in the mandible to implement Class III traction. In this way, the time for correcting anterior crossbite can be minimized with the cooperation of Class III traction and reinforcing bar, while achieving low-friction overall efficient distal movement of the mandibular arch and rapid jump relief of anterior crossbite.

[0085] The third-stage orthodontic appliance in this embodiment includes a third maxillary brace and a third mandibular brace, which can be a conventional invisible brace, to make a final fine adjustment to the position of the teeth.

[0086] Orthodontic treatment is a relatively long process, involving multiple adjustment goals in each stage. Waiting for all adjustments to be completed simultaneously before moving on to the next stage often prolongs the time and cycle of orthodontic treatment. Therefore, carrying over some adjustments from the previous stage to the next stage can help shorten the time and cycle of orthodontic treatment.

[0087] In view of this, in some other embodiments, one or more of the following settings may be optionally added to the second-stage and third-stage orthodontic appliances.

[0088] (1) A palatal crossbar 215 is installed in the maxillary posterior tooth region of the second maxillary brace 210, as referenced. Figure 5 Its structure and setup are similar to the palatal crossbar 115 in the posterior region of the first maxillary brace 110, for use in continuing the first stage of arch expansion or for retention after arch expansion.

[0089] (2) A palatal crossbar is provided on the third maxillary crown, which is the same structure as the palatal crossbar 115 of the first maxillary crown 110, for use in continuing arch expansion or for retention after arch expansion.

[0090] (3) Class III traction hooks are installed on the third maxillary brace and the third mandibular brace respectively to maintain the traction effect of the previous stage through Class III traction.

[0091] (4) On the third maxillary brace, the anterior gingival wrapping part 113 and the anterior traction hook 114 of the first maxillary brace 110 are set, and the external traction mask is used to fine-tune or maintain the traction effect in the sagittal direction of the previous stage.

[0092] Each upper and lower aligner of the orthodontic appliance in each stage of this embodiment can be manufactured as a single piece, preferably by 3D printing.

[0093] The preferred embodiments of this utility model have been described in detail above. It should be understood that those skilled in the art can make numerous modifications and variations based on the concept of this utility model without creative effort. Therefore, all technical solutions that can be obtained by those skilled in the art based on the concept of this utility model through logical analysis, reasoning, or limited experimentation on the basis of existing technology should be within the scope of protection defined by the claims.

Claims

1. An orthodontic appliance kit for treating skeletal Class III malocclusion in adolescents, characterized in that, include: The first stage orthodontic appliance includes a first maxillary brace and a first mandibular brace. The first maxillary brace is equipped with a labial reinforcement in the anterior region, an anterior traction hook, a Class III traction hook in the molar region, and a palatal crossbar in the first posterior region. The first mandibular brace is equipped with a hollow structure in the deciduous molar region and a Class III traction hook in the anterior region. The second-stage orthodontic appliance includes a second maxillary brace and a second mandibular brace. The second maxillary brace has a hollow structure in the maxillary anterior region, which includes a lingual reinforcing bar that abuts against the maxillary anterior teeth and applies pressure thereto. The second mandibular brace has a hollow structure in the mandibular anterior region, which includes a labial reinforcing bar that abuts against the mandibular anterior teeth and applies pressure thereto. The third-stage orthodontic appliance, comprising a third maxillary brace and a third mandibular brace, is used for fine adjustment of tooth position.

2. The orthodontic appliance kit as claimed in claim 1, characterized in that, The first maxillary brace includes a gingival wrapping portion in the anterior region, and the anterior traction hook is disposed in the gingival wrapping portion in the anterior region.

3. The orthodontic appliance kit as claimed in claim 1, characterized in that, The hollow structure in the deciduous molar region includes connecting rods respectively located on the buccal and lingual sides of the mandibular deciduous molars, with both ends of the connecting rods connected to the dental crowns that wrap around the front and back teeth of the deciduous molars.

4. The orthodontic appliance kit as claimed in claim 1, characterized in that, The hollow structure of the maxillary anterior tooth area also includes a labial buffer bar for the maxillary anterior tooth area, which is used to form a buffer space with the labial tooth surface of the maxillary anterior teeth.

5. The orthodontic appliance kit as claimed in claim 1, characterized in that, The hollow structure of the mandibular anterior tooth area also includes a lingual buffer bar for the mandibular anterior tooth area, which is used to form a buffer space with the lingual tooth surface of the mandibular anterior teeth.

6. The orthodontic appliance kit as claimed in claim 1, characterized in that, The second-stage orthodontic appliance is equipped with a Class III traction hook.

7. The orthodontic appliance kit as claimed in claim 1, characterized in that, The second maxillary brace also includes a palatal crossbar in the second posterior tooth region.

8. The orthodontic appliance kit as claimed in claim 1, characterized in that, The third maxillary brace also includes a palatal crossbar in the third posterior tooth region.

9. The orthodontic appliance kit as claimed in claim 1, characterized in that, It also includes a traction mask that is connected to the front traction hook.

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