An orthodontic appliance, aligner kit and treatment system

Abstract

The application discloses an orthodontic appliance, an appliance set and an orthodontic system. The orthodontic appliance comprises a shell-shaped tooth appliance, auxiliary correction devices and fasteners. The auxiliary correction devices are arranged on at least two teeth of a plurality of teeth. Each auxiliary correction device is provided with at least one passage allowing the fasteners to pass through and capable of fixing the fasteners. The fasteners can be arranged in the passages of the auxiliary correction devices and connected to at least two auxiliary correction devices. The shell-shaped tooth appliance cooperates with the auxiliary correction devices and the fasteners to move the plurality of teeth from a first position to a second position. The appliance set comprises two orthodontic appliances. The orthodontic system comprises at least one appliance set or a plurality of orthodontic appliances.

Description

Technical Field

[0001] This invention belongs to the field of orthodontic technology, more specifically to the field of shell-shaped orthodontic appliances, and particularly to a combined orthodontic appliance, an appliance kit using the same, and an orthodontic system. Background Technology

[0002] Orthodontics primarily uses force to correct malocclusion, and an orthodontic appliance is a device that can generate force to treat malocclusion. Among them, removable appliances, functional appliances, and fixed appliances together constitute the three major systems of orthodontic technology.

[0003] Fixed orthodontic appliances are an important type of orthodontic appliance. These appliances are fixed to the teeth by bonding or ligation. Fixed orthodontic appliances have the advantages of good retention, sufficient anchorage, suitability for applying various types of orthodontic forces, and facilitate the movement of most teeth. They can also effectively control the direction of tooth movement. Therefore, fixed orthodontic appliances are widely used in orthodontic treatment. There are many types of fixed orthodontic appliances, among which labial / lingual arch appliances and double arch appliances were used earlier. Multi-band appliances have become widely used fixed orthodontic appliances in clinical practice, such as square wire appliances and thin wire appliances. The force-applying part of fixed orthodontic appliances is the orthodontic archwire, which is mostly composed of stainless steel wire or alloy steel wire.

[0004] Removable orthodontic appliances are those that can be freely worn and removed by the patient or doctor, and remain intact when removed. They exert their corrective effect through the retention of clasps and adhesion to the mucosa. Doctors can add or remove attachments that generate corrective force as needed to achieve the goal of correcting malocclusion.

[0005] Fixed and removable orthodontic appliances each have their advantages and disadvantages. The advantages of fixed appliances include: 1) good retention and sufficient anchorage; 2) ability to move most teeth; ease of overall movement, torque, and rotation; 3) control over the direction of tooth movement; 4) ability to correct more complex malocclusions; 5) small size and greater comfort; 6) no impact on pronunciation and speech training; 7) longer intervals between clinical follow-up appointments for force adjustments; 8) patients cannot remove the appliances themselves, allowing for continuous use. The disadvantages of fixed appliances include: 1) requiring special attention to oral hygiene, as neglect can easily lead to cavities and gingivitis; 2) relatively complex techniques and longer chairside time, thus requiring experienced dentists; 3) excessive force can cause periodontal damage if the patient cannot remove the appliances independently, leading to adverse consequences. The advantages of removable orthodontic appliances include: 1) Patients can remove and put them on themselves, making them easy to clean and maintaining oral hygiene; 2) They avoid damage to teeth and periodontal tissues; if excessive force causes pain, the patient can remove the appliance themselves, and the corrective force can be eliminated as the appliance moves out of place; 3) They do not affect aesthetics; if needed for diplomatic occasions, performances, etc., they can be worn at night; 4) They can correct common malocclusions. The disadvantages of removable orthodontic appliances include: 1) Insufficient anchorage; 2) Single force application, less control over tooth movement compared to removable appliances, and tooth movement is mostly tilting, making overall movement difficult; 3) Affects pronunciation; tongue movement is limited due to the base; 4) A foreign body sensation; 5) Difficulty in managing remaining gaps. In summary, fixed and removable orthodontic appliances each have their advantages and disadvantages. A combination of the advantages of both while mitigating their disadvantages is of great significance for treating special cases and achieving better orthodontic results. In recent years, invisible orthodontic appliances have become increasingly popular among orthodontic patients due to their ease of removal and comfort.

[0006] However, invisible orthodontic technology still has shortcomings and limitations. Its effectiveness is relatively limited in correcting the following clinical problems, mainly: 1. Severe malocclusion of individual teeth or groups of teeth, such as rotation, tilting, labiolingual misalignment, and vertical low positioning; 2. Leveling the Spee curve and establishing posterior tooth occlusion; 3. Anterior tooth retraction, posterior tooth axial inclination control, and closure of extraction gaps in extraction cases. Therefore, combining fixed orthodontic treatment with invisible orthodontic technology to solve these technical problems is of great significance. Summary of the Invention

[0007] The main objective of this invention is to provide an orthodontic appliance, a set of orthodontic appliances, and an orthodontic system that addresses the shortcomings and limitations of existing shell-shaped orthodontic appliances.

[0008] The technical solution provided by this invention is as follows:

[0009] An orthodontic appliance comprising:

[0010] A shell-shaped orthodontic appliance having tooth receiving cavities for accommodating teeth, wherein a plurality of said tooth receiving cavities are connected in series;

[0011] An auxiliary orthodontic device is disposed on at least two of the plurality of teeth; each of the auxiliary orthodontic devices is provided with at least one channel that allows fasteners to pass through and is capable of securing the fasteners;

[0012] Fasteners are capable of being inserted into the channels of the auxiliary orthodontic devices and connecting at least two of the auxiliary orthodontic devices;

[0013] The shell-shaped orthodontic appliance, together with the auxiliary orthodontic device and the fastener, moves the multiple teeth from a first position to a second position.

[0014] The shell-shaped orthodontic appliance includes a tooth receiving cavity that houses teeth and provides orthodontic force to move teeth without auxiliary orthodontic devices and fasteners from a first position to a second position. The shell-shaped orthodontic appliance also includes an auxiliary orthodontic device receiving portion and a fastener receiving portion, respectively used to house the auxiliary orthodontic device and the fastener. Both the auxiliary orthodontic device receiving portion and the fastener receiving portion are connected to the tooth receiving cavity. Teeth equipped with the auxiliary orthodontic device and the fastener are moved from the first position to the second position by the orthodontic force provided by the fastener, or by the combined orthodontic force provided by the auxiliary orthodontic device and the fastener, or by the combined orthodontic force provided by the auxiliary orthodontic device, the fastener, and the tooth receiving cavity.

[0015] Preferably, in the above-mentioned orthodontic appliances, the auxiliary orthodontic device includes:

[0016] A reference portion that can be fixed to the tooth surface, and

[0017] An orthodontic unit extending from the reference portion toward a side away from the tooth surface, and used in conjunction with the shell-shaped orthodontic appliance, wherein...

[0018] The orthodontic unit is at least partially housed within an auxiliary orthodontic device receiving portion corresponding to the orthodontic unit in the shell-shaped orthodontic appliance, and,

[0019] The straightening part is provided with at least one channel that allows the fastener to pass through and can secure the fastener.

[0020] The outer contour of the orthodontic unit at least partially matches the outer contour of an accessory that can cooperate with the receiving part of the auxiliary orthodontic device for orthodontic treatment, so that the auxiliary orthodontic device also has substantially the same orthodontic function as the accessory.

[0021] Preferably, in the above-mentioned orthodontic appliances, the channel does not intersect with the reference portion.

[0022] Preferably, the channel in the orthodontic appliance described above is an internal perforation provided in the mesiodistal direction in the orthodontic part and / or a groove provided in the mesiodistal direction on the outer surface of the orthodontic part.

[0023] Preferably, when the channel is an internal perforation, the distance between the internal perforation and the reference part is not less than the distance between the internal perforation and the outer surface of the correction part.

[0024] Preferably, when the orthodontic appliance described above is provided with both the internal perforation and the groove, the internal perforation is positioned closer to the reference portion than the groove is positioned.

[0025] Preferably, the cross-section of the internal perforation along the labial / cheek-lingual side is one of a circle, a semi-circle, an ellipse, a semi-ellipse, a polygon, or a combination of the above shapes.

[0026] Preferably, when the cross-section of the internal perforation along the labial / buccal / lingual side is circular, the diameter of the cross-section is 0.25mm-0.78mm; when the cross-section of the internal perforation along the labial / buccal / lingual side is square / rectangular / regular hexagonal, the side length of the cross-section is 0.40-0.72mm.

[0027] Preferably, the groove of the orthodontic appliance described above has a cross-section along the labial / buccal-lingual side that is one of a circular arc, a semi-circular arc, an elliptical arc, a semi-elliptical arc, a polygon, or a combination of the above shapes.

[0028] Preferably, when the auxiliary orthodontic appliance is provided with both the built-in perforation and the groove, the line connecting the center of the cross section of the built-in perforation along the labial / buccal / lingual side and the center of the cross section of the groove along the labial / buccal / lingual side is not perpendicular to the long axis of the tooth fixed by the auxiliary orthodontic appliance.

[0029] Preferably, in the above-mentioned orthodontic appliance, the angle α formed by the line connecting the center of the cross section of the built-in perforation along the labial / buccal-lingual side and the center of the cross section of the groove along the labial / buccal-lingual side, and the long axis of the tooth fixed by the auxiliary orthodontic device, is an acute angle.

[0030] Preferably, in the above-mentioned orthodontic appliance, the angle α formed by the line connecting the center of the cross section of the built-in perforation along the labial / buccal-lingual side and the center of the cross section of the groove along the labial / buccal-lingual side, and the long axis of the tooth fixed by the auxiliary orthodontic device is 30°-60°.

[0031] Preferably, the number of the internal perforations and / or the grooves in the above-mentioned orthodontic appliances is at least one.

[0032] Preferably, in the above-mentioned orthodontic appliances, the reference part is a planar structure or a curved structure that fits against the tooth surface.

[0033] Preferably, when the reference part is a planar structure, the built-in perforation and / or the groove are arranged parallel to the reference part in the mesiodistal direction.

[0034] Preferably, when the reference part is a curved structure that fits the tooth surface, the curvature of the reference part matches the curvature of the built-in perforation and / or the groove along the mesiodistal direction.

[0035] Preferably, the orthodontic appliance described above has a surface structure on the side of the reference portion adjacent to the tooth to increase friction.

[0036] Preferably, in the above-mentioned orthodontic appliance, the length of the auxiliary orthodontic device, excluding the channel, is 0.2mm-4.0mm in the lateral cross-section along the lip / buccal tongue.

[0037] Preferably, the lower end of the auxiliary orthodontic device on the side adjacent to the gingival line extends towards the occlusal surface with a smoothly transitioning inclined curved surface.

[0038] Preferably, the orthodontic appliance described above has an auxiliary receiving portion for accommodating the auxiliary orthodontic component on the side of the auxiliary orthodontic device near the occlusal surface and / or the side of the auxiliary orthodontic device near the gingival line.

[0039] Preferably, in the above-mentioned orthodontic appliance, the auxiliary receiving part is a receiving groove recessed towards the center of the auxiliary orthodontic device.

[0040] Preferably, the orthodontic appliance described above has one receiving slot on the side adjacent to the occlusal surface and one on the side adjacent to the gingival line, and the slots are arranged symmetrically.

[0041] Preferably, in the above-mentioned orthodontic appliance, the outer contour of the orthodontic part at least partially matches the outer contour of an attachment that can cooperate with the attachment receiving part for orthodontic treatment, so that the auxiliary orthodontic device also has the same orthodontic function as the attachment.

[0042] Preferably, in the above-mentioned orthodontic appliance, the outer contour of the orthodontic part matches the outer contour of an attachment that can cooperate with the attachment receiving part to perform orthodontic treatment, so that the auxiliary orthodontic device also has a substantially the same orthodontic function as the attachment.

[0043] Preferably, in the above-mentioned orthodontic appliance, the outer contour of the orthodontic part matches the outer contour of an attachment that can cooperate with the attachment receiving part to perform orthodontic treatment, so that the auxiliary orthodontic device also has the same orthodontic function as the attachment.

[0044] Preferably, in the above-mentioned orthodontic appliance, the auxiliary orthodontic device receiving portion of the shell-shaped orthodontic appliance has its side adjacent to the auxiliary orthodontic device engaged with the outer surface of the auxiliary orthodontic device to produce an orthodontic effect.

[0045] Preferably, in the above-mentioned orthodontic appliance, the fastener receiving portion on the shell-shaped orthodontic appliance is located between adjacent auxiliary orthodontic device receiving portions, and the adjacent auxiliary orthodontic device receiving portions are in communication with the fastener receiving portion.

[0046] Preferably, in the shell-shaped orthodontic appliance described above, when multiple auxiliary orthodontic device receiving parts are provided, both ends of the communicating space formed by the auxiliary orthodontic device receiving part and the fastener receiving part are further provided with auxiliary fastening parts for receiving the end of the fastener and assisting in fixing the fastener.

[0047] Preferably, in the above-mentioned orthodontic appliance, the cross-section of the fastener receiving part along the labial / buccal-lingual side is one of a circular arc, an elliptical arc, or a polygon.

[0048] Preferably, the shell-shaped orthodontic appliance is further provided with an attachment receiving part for accommodating dental orthodontic attachments.

[0049] Based on the same inventive concept, the present invention also provides an orthodontic appliance set, including a first orthodontic appliance and a second orthodontic appliance respectively worn in the first dentition and the opposing dentition, wherein the first orthodontic appliance is any of the above-mentioned orthodontic appliances.

[0050] Preferably, in the above-mentioned orthodontic appliance set, the second orthodontic appliance includes a shell-shaped dental appliance, which includes a hollow structure for accommodating the opposing dentition.

[0051] Preferably, in the above-mentioned orthodontic appliance set, the second orthodontic appliance is any of the above-mentioned orthodontic appliances.

[0052] Based on the same inventive concept, the present invention also provides an orthodontic system, including a first set of orthodontic appliances, a plurality of intermediate sets of orthodontic appliances and a final set of orthodontic appliances, wherein at least one set of orthodontic appliances is any of the above-mentioned sets of orthodontic appliances.

[0053] Based on the same inventive concept, the present invention also provides an orthodontic system comprising a plurality of orthodontic appliances, wherein at least one orthodontic appliance is any of the above-mentioned orthodontic appliances.

[0054] The orthodontic appliances, appliance sets, and orthodontic systems provided by this invention can bring at least one of the following beneficial effects:

[0055] 1. The orthodontic appliance of this invention combines invisible and fixed orthodontic treatments. It features a specially designed auxiliary orthodontic device that simultaneously functions as both a conventional invisible orthodontic attachment and a fixed orthodontic bracket. Channels on the auxiliary orthodontic device allow fasteners, such as archwires, to pass through. The outer contour of the auxiliary orthodontic device matches the outer contour of conventional attachments. When interacting with the invisible orthodontic appliance, the auxiliary orthodontic device functions as an attachment. Simultaneously, it can also function as a bracket for fixed orthodontic treatment, allowing fasteners (such as archwires) to pass through its channels (such as internal perforations and / or grooves) to achieve a fixed orthodontic effect. When a patient's teeth require combined fixed and invisible orthodontic treatment, the auxiliary orthodontic device can be simply attached to the teeth, allowing it to function as both an attachment and a bracket at different times during treatment, or simultaneously as both. This avoids the need to repeatedly attach attachments and brackets to the tooth surface for different treatment needs, thereby reducing damage to the patient's teeth.

[0056] 2. When using the orthodontic appliance of the present invention for treatment, fasteners such as archwire segments are inserted or recessed into the built-in perforations and / or grooves on the auxiliary orthodontic device. The shell-shaped orthodontic appliance encloses the auxiliary orthodontic device and the fasteners. The shell-shaped orthodontic appliance and the auxiliary orthodontic device are combined to achieve a combination of invisible and fixed orthodontic treatment. The shell-shaped orthodontic appliance encloses the auxiliary orthodontic device and the fasteners. The three work together to achieve mutual compensation of the treatment effects of fixed and invisible orthodontic treatment. It has better treatment effects for the correction of malocclusion of individual teeth, groups of teeth and local dentition and the enhancement of anchorage.

[0057] 3. Make auxiliary receiving parts at the upper and lower ends of the auxiliary orthodontic device to embed ligatures or rubber chains, effectively fix fasteners such as archwires, and achieve the orthodontic and movement effects of applying force in a fixed direction. Attached Figure Description

[0058] The preferred embodiments will now be described in a clear and easy-to-understand manner, with reference to the accompanying drawings, to further explain the above-mentioned characteristics, technical features, advantages, and implementation methods.

[0059] Figure 1 This is a schematic diagram of an orthodontic appliance according to an embodiment of the present invention;

[0060] Figure 2a , Figure 2b This is a schematic diagram of the structure of one embodiment of the auxiliary correction device of the present invention;

[0061] Figure 3 This is a schematic diagram of the structure of a second embodiment of the auxiliary correction device of the present invention;

[0062] Figure 4This is a schematic diagram of the structure of a third embodiment of the auxiliary orthodontic device of the present invention;

[0063] Figure 5a , Figure 5b This is a schematic diagram of the structure of Embodiment 4 of the auxiliary orthodontic device of the present invention;

[0064] Figure 6a , Figure 6b This is a schematic diagram of the structure of Embodiment 5 of the auxiliary orthodontic device of the present invention;

[0065] Figure 7a , Figure 7b This is a schematic diagram of a sixth embodiment of the auxiliary orthodontic device of the present invention;

[0066] Figure 8 This is a schematic diagram of the structure of Embodiment 7 of the auxiliary orthodontic device of the present invention;

[0067] Figure 9a , Figure 9b This is a schematic diagram of the structure of an eighth embodiment of the auxiliary orthodontic device of the present invention;

[0068] Figure 10a , Figure 10b This is a schematic diagram of the structure of embodiment nine of the auxiliary correction device of the present invention;

[0069] Figure 11a , Figure 11b This is a schematic diagram of an auxiliary orthodontic device with an anti-loosening structure according to an embodiment of the present invention;

[0070] Figure 12a , Figure 12b This is a cross-sectional schematic diagram of the reference part and the curvature of the channel of the auxiliary orthodontic device according to an embodiment of the present invention;

[0071] Figure 13 This is a schematic diagram of the shell-shaped orthodontic appliance according to an embodiment of the present invention;

[0072] Figure 14a , Figure 14b This is a schematic diagram of the auxiliary fastening part of the shell-shaped orthodontic appliance according to an embodiment of the present invention;

[0073] Figure 15 This is a schematic diagram of the structure of a first embodiment of the orthodontic appliance kit according to an embodiment of the present invention;

[0074] Figure 16a and Figure 16b This is a schematic diagram of the structure of the correction system according to an embodiment of the present invention. Detailed Implementation

[0075] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the specific implementation methods of the present invention will be described below with reference to the accompanying drawings. Obviously, the drawings described below are merely some embodiments of the present invention. For those skilled in the art, other drawings and other implementation methods can be obtained based on these drawings without any creative effort.

[0076] The orthodontic appliances and corresponding appliance sets and orthodontic systems provided by this invention, which include auxiliary orthodontic devices, can be used together with shell-shaped dental appliances, auxiliary orthodontic devices and fasteners to provide greater orthodontic force to individual teeth. This makes them more suitable for the correction of rotation, tilt, labiolingual misalignment, vertical low position, etc., as well as the correction of Spee curve and the establishment of posterior tooth occlusion, and the correction of anterior tooth retraction, posterior tooth axial inclination control and closure of extraction gaps in cases of tooth extraction.

[0077] One of the key design features of this invention lies in the design of the auxiliary orthodontic device. This device combines the functions of a commonly used accessory in invisible orthodontics with traditional brackets in fixed orthodontics. It maximizes the utilization of the auxiliary orthodontic device and reduces the need for repeated attachments to teeth, thus minimizing tooth damage. When functioning as a bracket, fasteners such as archwire segments are inserted or recessed within the auxiliary orthodontic device. Under the overall coverage and control of the shell-shaped invisible aligner, it performs individual tooth, group tooth, and partial dentition correction, such as misalignment correction and anchorage enhancement, leveraging the advantages of classic fixed orthodontic techniques.

[0078] The orthodontic appliance of the present invention can be used in one or more steps of the entire orthodontic treatment process according to actual needs. The auxiliary orthodontic device can be used as a common accessory or as a bracket in different treatment stages. At least some treatment stages can use more than one archwire, and different sizes or materials of archwires can be selected in different treatment stages.

[0079] Example

[0080] Please see Figure 1 This embodiment provides an orthodontic appliance, which includes:

[0081] The shell-shaped orthodontic appliance 11 has a tooth receiving cavity 110 for accommodating teeth, wherein a plurality of the tooth receiving cavities are connected in communication.

[0082] An auxiliary orthodontic appliance 12 is disposed on at least two of the plurality of teeth; each of the auxiliary orthodontic appliances 12 has at least one channel that allows fasteners to pass through and can secure the fasteners. An example of an auxiliary orthodontic appliance 12 is shown below. Figure 2a, Figure 2b ;

[0083] Fastener 13, such as an archwire, can be threaded through the channel of the auxiliary orthodontic device 12 and connected to at least two of the auxiliary orthodontic devices 12;

[0084] The shell-shaped orthodontic appliance 11 cooperates with the auxiliary orthodontic device 12 and the fastener 13 to move the multiple teeth from the first position to the second position;

[0085] The shell-shaped orthodontic appliance 11 includes a tooth receiving cavity 110 that receives teeth and provides orthodontic force to move teeth without auxiliary orthodontic devices 12 and fasteners 13 from a first position to a second position. The shell-shaped orthodontic appliance 11 also includes an auxiliary orthodontic device receiving portion 111 and a fastener receiving portion 112, which respectively receive the auxiliary orthodontic device 12 and the fastener 13. Both the auxiliary orthodontic device receiving portion 111 and the fastener receiving portion 112 are connected to the tooth receiving cavity 110. Teeth equipped with the auxiliary orthodontic device 12 and the fastener 13 are moved from the first position to the second position by the orthodontic force provided by the fastener 13, or by the combined orthodontic force provided by the auxiliary orthodontic device 12, the fastener 13, and the tooth receiving cavity 110.

[0086] In the orthodontic appliance, the auxiliary orthodontic device receiving part 111 of the shell-shaped orthodontic appliance 11, on the side adjacent to the auxiliary orthodontic device 12, cooperates with the outer surface of the auxiliary orthodontic device 12 to produce an orthodontic effect, thereby better realizing the accommodating and cooperating effects, and thus achieving the orthodontic effect.

[0087] In the orthodontic appliance, the auxiliary orthodontic device receiving part 111 and the fastener receiving part 112, which are interconnected on the shell-shaped orthodontic appliance 11, are spaced apart, so that the archwire can be connected to two adjacent auxiliary orthodontic devices to achieve the effect of straightening teeth.

[0088] Fasteners are archwires or other components that can secure two or more adjacent assistive orthodontic devices, and are usually filaments or strips.

[0089] The following combination Figures 2a-10b The optional structure of the auxiliary correction device 12 of the present invention is described.

[0090] like Figures 2a-10bAs shown, the auxiliary orthodontic device provided in this embodiment is used in conjunction with the shell-shaped orthodontic appliance 11 (also known as an invisible orthodontic appliance) to perform orthodontic treatment, so that the teeth gradually change from the initial position to the target orthodontic position. The initial position of the teeth can be the initial position of the teeth to be treated, or any position before treatment during the orthodontic process. The target orthodontic position of the teeth can be any position that is closer to the orthodontic target than the initial position.

[0091] The preferred structure of the auxiliary orthodontic device 12 includes:

[0092] A reference portion that can be fixed to the tooth surface, and

[0093] An orthodontic unit extending from the reference portion toward the side away from the tooth surface and used in conjunction with the shell-shaped orthodontic appliance 11, wherein...

[0094] The orthodontic unit is at least partially housed within the auxiliary orthodontic device receiving portion 111 of the shell-shaped orthodontic appliance corresponding to the orthodontic unit, and,

[0095] The straightening part is provided with at least one channel that allows fasteners to pass through and can secure the fasteners.

[0096] The outer contour of the orthodontic unit at least partially matches the outer contour of an accessory that can cooperate with the auxiliary orthodontic device receiving part 111 to perform orthodontic treatment, so that the auxiliary orthodontic device 12 also has substantially the same orthodontic function as the accessory.

[0097] Specifically, the aforementioned reference part can be a surface of the auxiliary orthodontic device 12 that conforms to the tooth surface, used to bond the auxiliary orthodontic device 12 to the tooth surface; the orthodontic part has the shape of a commonly used accessory for use with a shell-shaped orthodontic appliance, and can realize the function of a commonly used accessory, such as fixing the shell-shaped dental appliance, or applying orthodontic force to the teeth in conjunction with the shell-shaped orthodontic appliance. The orthodontic part is also configured to have the function of a traditional bracket. Through the above-mentioned channel, fasteners such as archwires can pass through the above-mentioned channel and be fixed on the orthodontic part.

[0098] The orthodontic unit and the auxiliary orthodontic appliance housing cooperate to complete the corresponding orthodontic function. The relationship between the outer contour of the orthodontic unit and the outer contour of an attachment that can cooperate with the auxiliary orthodontic appliance housing for orthodontic treatment is explained. The outer contour of the orthodontic unit can match the outer contour of the attachment to achieve the same orthodontic effect; alternatively, a portion of the outer contour of the orthodontic unit and the outer contour of the attachment can match, with the matching portion interacting with the shell-shaped orthodontic appliance to generate corresponding orthodontic force; or the outer contour of the orthodontic unit can match the outer contour of the attachment, so that the auxiliary orthodontic appliance also has essentially the same orthodontic function as the attachment, such as the attachment being a rectangular... The outer contour of the rectangular attachment matches the outer contour of the orthodontic unit. In addition to the orthodontic effect produced by the interaction between the rectangular attachment and the shell-shaped orthodontic appliance, the orthodontic unit can also interact with the shell-shaped orthodontic appliance to produce a retention effect. Therefore, the orthodontic effects of the orthodontic unit and the attachment are similar or substantially the same. Alternatively, the outer contour of the orthodontic unit can match a portion of the outer contour of the attachment, so that the auxiliary orthodontic device also has the same orthodontic effect as the attachment. For example, if the attachment is rectangular, only one surface of it interacts with the shell-shaped orthodontic appliance to produce the orthodontic effect. The auxiliary orthodontic device has the same surface that produces the corresponding orthodontic effect, but the remaining parts are different from the outer contour of the attachment, which can also achieve the same orthodontic effect.

[0099] The auxiliary orthodontic device receiving portion 111 on the shell-shaped orthodontic appliance 11 is used to accommodate the auxiliary orthodontic device 12 and enable the auxiliary orthodontic device 12 to be used in conjunction with the shell-shaped orthodontic appliance 11. The use in conjunction can include the following two situations: one situation is that the auxiliary orthodontic device functions as an accessory and cooperates with the auxiliary orthodontic device receiving portion 111 on the shell-shaped orthodontic appliance to generate orthodontic force; the other situation is that the auxiliary orthodontic device cooperates with the auxiliary orthodontic device receiving portion 111 on the shell-shaped orthodontic appliance but does not generate orthodontic force, and the function of the auxiliary orthodontic device as an accessory is only to retain the orthodontic appliance.

[0100] In order to achieve effective and uniform orthodontic force by cooperating with the fasteners to complete the orthodontic treatment, the channel on the orthodontic part of the above-mentioned auxiliary orthodontic device does not intersect with the reference part. If the channel intersects with the reference part, the fastener (such as the archwire) will come into contact with the tooth surface when passing through the channel, resulting in wear on the tooth surface and direct orthodontic force applied by the archwire, which increases discomfort. Furthermore, if the two intersect, the reference part will have a perforation or groove in the channel, which reduces the contact area between the reference part and the tooth surface and reduces the stability of the auxiliary orthodontic device.

[0101] In a preferred structure of the auxiliary orthodontic device, the channel is an internal perforation provided in the orthodontic part along the mesiodistal direction and / or a groove provided on the outer surface of the orthodontic part along the mesiodistal direction.

[0102] Please see Figure 2a , Figure 2b This illustration showcases a structure of an auxiliary orthodontic appliance 100. The auxiliary orthodontic appliance 100 includes a base portion 101, which is a surface close to the tooth surface and can be bonded to it. The portion excluding the base portion 101 is called the orthodontic portion 102. The orthodontic portion 102 is shaped like a conventional accessory used with clear aligners, and can be accommodated or partially accommodated within a corresponding auxiliary orthodontic appliance housing on a shell-shaped orthodontic appliance, enabling the auxiliary orthodontic appliance to be used in conjunction with the shell-shaped orthodontic appliance. The orthodontic portion 102 has an internal perforation 103 near the center of the clinical crown, running mesiodistally. The internal perforation 103 allows a fastener, such as an archwire, to pass through and be fixed to the auxiliary orthodontic appliance 100. The internal perforation 103 does not intersect with the base portion 101. The internal perforation 103 allows the archwire to be positioned on the auxiliary orthodontic appliance 100 and apply orthodontic force to the teeth.

[0103] Figure 3 The structure of another auxiliary orthodontic device 200 with built-in perforations is shown. Its outline is different from that of Figure 2, and it is generally rectangular.

[0104] Figure 2a , Figure 2b and Figure 3 The outer contours of auxiliary orthodontic appliances are such that their height along the long axis of the teeth is greater than their width along the mesiodistal direction; these can be called vertical attachments. Because... Figure 2a , Figure 2b Both Figure 3 and Figure 4 use an internal perforation channel. Therefore, a relatively small width along the mesiodistal direction and a relatively long length along the long axis of the tooth are chosen to facilitate the fabrication of the internal perforation and the insertion of the archwire. The auxiliary orthodontic device described above can be made of ceramic or metal. The vertical attachment can be placed in either the anterior or posterior region, depending on the specific treatment plan. It is preferably placed in the anterior region, as it is more suitable for teeth with a relatively long length along their long axis.

[0105] The "posterior region" is defined according to the tooth classification in the 2nd edition of *Introduction to Stomatology*, published by Peking University Medical Press, on pages 36-38. It includes premolars and molars, teeth marked as 4-8 using the FDI notation, and teeth marked as 1-3 using the FDI notation for the anterior region. The anterior region of the shell-shaped orthodontic appliance can accommodate the central incisors, lateral incisors, and canines of the maxilla or mandible. The posterior region of the shell-shaped orthodontic appliance can accommodate the first premolar, second premolar, first molar, second molar, and third molar of the maxilla or mandible.

[0106] Figure 4 Another type of orthodontic appliance 300 is shown, in which the channel is selected and located on the side of the appliance as a groove 304 along the mesiodistal direction. Furthermore, since the groove 304 is open, it is easy to manufacture and facilitates the insertion of the archwire. The outer contour of the orthodontic appliance 300 has a height along the long axis of the tooth that is less than its width along the mesiodistal direction, which can be referred to as a horizontal attachment. Therefore, the width of this orthodontic appliance along the mesiodistal horizontal direction can be set relatively wide, making it suitable for placement on teeth with a relatively wide mesiodistal direction, such as molars in the posterior region. After being bonded to the tooth, the contact area between the orthodontic appliance and the archwire in the mesiodistal direction is larger, which is more conducive to the interaction between the two to provide orthodontic force. The orthodontic appliance with the above structure can be made of ceramic or metal materials, and the specific location of the horizontal attachment can be in the anterior or posterior region, added adaptively according to the specific orthodontic plan, with placement in the posterior region being preferred.

[0107] Figures 5a-10b Several different structures of assistive orthodontic devices are shown, in which the channel is selected by simultaneously setting internal perforations and grooves along the mesiodistal direction. The advantages of simultaneously setting internal perforations and grooves are that, firstly, it can fix one or more archwires, providing more orthodontic force application options according to actual orthodontic needs; secondly, when fixing the archwire, a more suitable fixation position can be selected in the internal perforation or groove according to the orthodontic needs to pass the archwire through, thereby achieving the orthodontic purpose.

[0108] The built-in perforations and grooves can be set on different horizontal planes, such as... Figure 5a , Figure 5b Figure 6a Figure 6b , Figure 7a , Figure 7b , Figure 9a , Figure 9b , Figure 10a , Figure 10b Alternatively, built-in perforations and grooves can also be set on the same horizontal plane, for example... Figure 8 As shown.

[0109] In the preferred embodiment, the built-in perforations and grooves are staggered, meaning they are not on the same horizontal plane. This allows the auxiliary orthodontic device to be relatively thin along the lip / cheek-lingual direction, thereby reducing the foreign body sensation felt by the patient.

[0110] In order to obtain a better distribution of corrective force and appropriate strength of auxiliary orthodontic devices, when the channel includes an internal perforation, it is preferable that the distance between the internal perforation and the reference part is not greater than the distance between the internal perforation and the outer surface of the orthodontic part.

[0111] by Figure 5b For example, the distance between the built-in perforation 403 and the reference part 401 is the distance between the leftmost point of the built-in perforation 403 closest to the reference part 401 and the surface of the nearest reference part 401, denoted as a; the distance between the built-in perforation 403 and the adjacent lip / cheek or lingual side (also referred to as the outer surface of the correction part) of the correction part 402 is the distance between the rightmost point of the built-in perforation 403 furthest from the reference part 401 and the adjacent lip / cheek or lingual side of the auxiliary correction device, denoted as b. In this case, a ≤ b. More preferably, a = b. This is because when a > b (the left and right orientations are...), Figure 2a , Figure 2b , Figure 3 , Figures 5a-10b As shown in the left and right examples, when applying orthodontic force by inserting the archwire, the distance between the archwire and the teeth is relatively large, which makes it easy for the force to deviate. In addition, if b is too small, it will cause damage to the right side of the auxiliary orthodontic device when the force is too large. Therefore, the optimal design position for the internal perforation is at or near the center of the labial / buccal-lingual lateral section.

[0112] To optimize the orthodontic force scheme and better ensure the strength of the auxiliary orthodontic device, when the auxiliary orthodontic device has both the built-in perforation and the groove, the built-in perforation is positioned closer to the reference point than the groove. Specifically, the central axis of the built-in perforation is closer to the reference point than the centerline of the groove. This makes it easier to insert the archwire through the groove, and allows for more precise force application when inserting the archwire through the built-in perforation.

[0113] The cross-sectional shape of the built-in perforation on the auxiliary orthodontic device is selected to be suitable for the insertion of the archwire. For example, the cross-section of the built-in perforation along the labial / cheek-lingual side is one of a circle, a semi-circle, an ellipse, a semi-ellipse, a polygon, or a combination of the above shapes. The combination of the above shapes refers to a combination of two or more shapes, such as a combination of a semi-circle and a rectangle. Figures 2a-3 Figure 5- Figure 10b In this context, the built-in perforations on the auxiliary orthodontic device are all circular. Of course, combinations of other shapes can also achieve the same technical effect, which will not be elaborated here.

[0114] To achieve a balance between the strength and wearing comfort of the orthodontic device, when the cross-section of the internal perforation along the labial / buccal / lingual side is circular, the diameter of the cross-section is 0.25mm-0.78mm, which translates to 0.0098 inches-0.031 inches. When the cross-section of the internal perforation along the labial / buccal / lingual side is square / rectangular / regular hexagonal, the side length of the cross-section is 0.40-0.72mm. The size of the fasteners, such as the diameter of the archwire, can be selected as needed. There are many types of orthodontic archwires: classified by the thickness of the round wire (unit: inches) 0.012, 0.014, 0.016, 0.018, and 0.020. Common thicknesses for square wire include (in inches): 0.016*0.016, 0.017*0.022, 0.017*0.025, 0.018*0.025, 0.019*0.025, and 0.0215*0.028. Based on the material, commonly used bowwires are stainless steel and nickel-titanium wire. Nickel-titanium wire, depending on its performance, can be further divided into ordinary nickel-titanium wire and heat-activated nickel-titanium wire, as well as β-titanium wire. Based on the cross-sectional shape, bowwires include round wire (circular cross-section), square wire (rectangular or square cross-section), and twisted wire (composed of multiple strands twisted together, resembling a braid). Bowwires from different manufacturers exhibit slightly different performance characteristics. Imported stainless steel wire, especially square wire, generally has better performance. The cross-sectional shape of the groove on the auxiliary orthodontic device is selected to be suitable for the insertion of the archwire. For example, the cross-section of the groove along the labial / cheek-lingual side is one of the following: a circular arc, a semi-circular arc, an elliptical arc, a semi-elliptical arc, a polygon, or a combination of the above shapes. The combination of the above shapes refers to a combination of two or more shapes. Figure 4 As shown, the groove is designed with a semi-circular cross-section on the side near the reference section and a rectangular cross-section on the side near the labial / cheeky / lingual region. This is to ensure the semi-circular cross-section near the reference section conforms more closely to the archwire's outline, while the rectangular cross-section near the labial / cheeky / lingual region facilitates archwire insertion. Additionally, to prevent the archwire from slipping out after being inserted into the groove, an anti-dislodgement structure can be incorporated, such as... Figure 11a , 11b As shown, the anti-loosening structure is a combined structure consisting of a rectangle 10a and a semi-circular structure 10b. The cross-section near the reference part is set as a rectangle, and the cross-section near the lip / cheek or tongue side is set as a semi-circular structure. The archwire enters from the semi-circular structure into the rectangular structure, and its position is relatively stable. Because there is a bend at the connection between the two, the archwire is not easy to slip out of the rectangular structure after it is inserted, which increases the tight connection between the auxiliary orthodontic device and the fastener, thereby achieving a better orthodontic effect. Figures 5a-10bThe groove is arc-shaped or semi-circular, and its shape can match the diameter of the bowwire, which facilitates the installation and removal of the bowwire.

[0115] In a preferred embodiment, when the auxiliary orthodontic device simultaneously provides the built-in perforation and the groove, the line connecting the center of the cross-section of the built-in perforation along the labial / buccal / lingual side and the center of the cross-section of the groove along the labial / buccal / lingual side is not perpendicular to the long axis of the tooth fixed by the auxiliary orthodontic device. For example... Figure 7b As shown, the line c connecting the centers of the cross-sections of the built-in perforation 603 and the groove 604 of the auxiliary orthodontic device 600 is not perpendicular to the long axis d of the tooth. Specifically, the angle between the two lines is denoted as α, which is preferably an acute angle, more preferably 30°-60°. Other examples include... Figure 9b The included angle α shown. When the line c connecting the center of the cross-section of the built-in perforation along the labial / buccal / lingual side and the center of the cross-section of the groove along the labial / buccal / lingual side is perpendicular to the long axis d of the tooth fixed by the auxiliary orthodontic device, it is considered that... Figure 8 In the structure shown, in order to simultaneously arrange built-in perforations and grooves in the thickness direction of the labial / buccal-lingual sides, the thickness of the auxiliary orthodontic device needs to be large enough. This will result in the auxiliary orthodontic device being too thick, affecting the patient's wearing comfort.

[0116] In the corrective section of the aforementioned auxiliary orthodontic device, at least one internal perforation and / or groove are provided, meaning that one or more internal perforations and one or more grooves can be provided. When multiple internal perforations or grooves are provided, on the one hand, different positions of internal perforations, or different positions of grooves, or different positions of internal perforations and grooves can be selected according to specific orthodontic needs; on the other hand, different options can be made for the simultaneous installation of multiple archwires according to actual orthodontic needs.

[0117] In the aforementioned auxiliary orthodontic device, the reference portion is a planar structure or a curved structure that conforms to the tooth surface. When the reference portion is a planar structure, the internal perforation and / or the groove are arranged parallel to the reference portion in the mesiodistal direction. When the reference portion is a curved structure that conforms to the tooth surface, the curvature of the reference portion matches the curvature of the internal perforation and / or the groove in the mesiodistal direction, such as... Figure 12a As shown, the curvature of the reference portion 1301 matches the curvature of the groove 1304 along the proximal-distal direction; as Figure 12b As shown, the curvature 1403 of the reference portion 1401 matches the curvature in the near-to-far direction. In Figures 2a-10b In the structure of the auxiliary orthodontic device shown, Figure 3 , Figure 4The reference parts 201 and 301 in the figure are planar structures, while the reference parts in the other figures are curved structures. The curvature of each curved reference part can be selected as various suitable curvatures, and the present invention does not limit this.

[0118] In some preferred configurations, the reference portion of the auxiliary orthodontic device also has a surface structure on the side adjacent to the teeth to increase friction, for example... Figure 10a , Figure 10b The raised dot structure 908 shown in the figure makes the auxiliary orthodontic device more stable after contacting or attaching to the teeth, and it is not easy to fall off the teeth after being attached, thus avoiding further damage to the tooth surface caused by subsequent repairs.

[0119] To achieve a balance between strength and wearing comfort in the orthodontic device, the length of the orthodontic device, excluding the channel, in the lip / buccal-lingual lateral section is 0.2mm-4.0mm. In other words, the orthodontic device incorporates built-in perforations or grooves. To prevent the orthodontic device from losing stability due to these perforations or grooves, ensuring a certain length of the orthodontic device excluding the channel, in the lip / buccal-lingual lateral section, is crucial to guarantee a sufficient thickness for the orthodontic device to interact linearly with the fasteners and produce the desired corrective effect.

[0120] In a preferred embodiment, the lower end face (shown in the figure) of the auxiliary orthodontic device on the side adjacent to the gingival line extends towards the occlusal surface (shown in the figure) with a smoothly transitioning inclined curved surface, such as... Figure 10a , Figure 10b , Figure 7a , Figure 7b , Figure 6a , Figure 6b , Figure 2a , Figure 2b As shown, the inclined surfaces are labeled 905, 605, 505, and 105, respectively. The structure of the inclined surfaces makes it easy to insert and remove the shell-shaped orthodontic appliance that works with the auxiliary orthodontic device.

[0121] In a preferred embodiment, the auxiliary orthodontic device is further provided with an auxiliary receiving portion for accommodating the auxiliary orthodontic component on the side adjacent to the occlusal surface and / or the side adjacent to the gingival line. The auxiliary receiving portion can be a receiving groove recessed towards the center of the auxiliary orthodontic device. One receiving groove can be provided on the side adjacent to the occlusal surface and one on the side adjacent to the gingival line, and they are symmetrically arranged. Figures 2a-10bIn the auxiliary orthodontic appliance shown, a recessed receiving slot is provided on the side adjacent to the occlusal surface (the upper end face in the figure) and / or the side adjacent to the gingival line (the lower end face in the figure), respectively labeled 106, 107, 206, 207, 306, 307, 406, 407, 506, 507, 606, 607, 706, 707, 806, 807, 906, and 907. The two receiving slots are either mirror-symmetrical or asymmetrical. The receiving slots are designed to accommodate auxiliary fasteners (such as rubber chains) to fix fasteners (such as archwires) in the relative positional relationship of the labial / buccal-lingual sides, and also to allow several adjacent teeth to be fastened as a whole. This can be used when multiple teeth need to be fastened together as a whole anchorage.

[0122] Please see Figure 13 This embodiment also provides a specific structure 1000 for a shell-shaped orthodontic appliance 11, used to cooperate with the auxiliary orthodontic device placed on the patient's teeth to achieve the orthodontic goal. The shell-shaped orthodontic appliance 1000 is provided with at least two accessory receiving portions 1001 for accommodating any of the aforementioned auxiliary orthodontic devices. Figure 13 The shell-shaped orthodontic appliance 1000 shown has three accessory receiving portions 1001. Furthermore, the number and location of the accessory receiving portions can be selected from any other suitable number. The shell-shaped orthodontic appliance 1000 also has a connecting portion 1002 between adjacent accessory receiving portions 1001, communicating with the adjacent accessory receiving portions 1001 and accommodating the fasteners, such as archwires. The adjacent accessory receiving portions 1001 and the connecting portion 1002 are connected. Figure 13 Two connecting parts 1002 are provided in the middle. The shell-shaped orthodontic appliance 1000 provided in this embodiment can also be used in conjunction with the auxiliary orthodontic device 12 set on the dental model to achieve the simulated orthodontic goal. The orthodontic effect produced by the interaction between the auxiliary orthodontic device 12 and the shell-shaped orthodontic appliance 1000 simulates the movement of the teeth on the dental model towards the target orthodontic position, so as to realize part of the simulated orthodontic plan. For example, when simulating the translation of the teeth on the dental model, when moving the tooth model on the dental model from the starting point to the stage target position, the shell-shaped orthodontic appliance 1000 and the auxiliary orthodontic device 12 set on the dental model are used to achieve this.

[0123] In a preferred embodiment, when multiple accessory receiving portions 1001 are provided, both ends of the communicating space formed by the accessory receiving portion 1001 and the connecting portion 1002 are further provided with auxiliary fastening portions for accommodating and assisting in fixing the fasteners. This is because the fasteners (such as archwires) pass through the auxiliary orthodontic device and can be relatively fixed in the buccal-lingual direction, but are not easy to fix in the mesiodistal direction. Therefore, the fixing method used in the mesiodistal direction can be as follows: Figure 14aAs shown, the two ends of the archwire are bent to prevent relative slippage of the archwire in the proximal-distal direction. The auxiliary fastening part is the space 1003 that accommodates the bent archwire. Alternatively, another structure of the auxiliary fastening part is as follows: Figure 14b As shown, after the archwire passes through the auxiliary orthodontic device, the free ends on both sides of the archwire are not bent. The relative position is fixed by the friction between the archwire and the channel on the auxiliary orthodontic device. For example, the inner surface of the built-in perforation on the auxiliary orthodontic device and the outer surface of the archwire are provided with structures that can increase the friction, such as a frosted structure or a raised structure, to increase the friction between the inner surface of the built-in perforation and the outer surface of the archwire, thereby achieving fixation in the mesiodistal direction. The free ends on both sides of the archwire protrude from the auxiliary orthodontic device. The two ends of the connecting space formed by the corresponding second accommodating space and the third accommodating space have auxiliary fastening parts 1004 to assist in the fixation of the fasteners, which can accommodate the protruding archwire.

[0124] In the aforementioned shell-shaped orthodontic appliance, the connecting portion 1002 has a cross-section along the labial / buccal-lingual side that is one of a circular arc, an elliptical arc, or a polygon. The connecting portion 1002 is used to accommodate the archwire, and its shape can be selected to be consistent with the archwire, while its cross-sectional dimensions can be selected to be larger or slightly larger than the archwire.

[0125] In the shell-shaped orthodontic appliance, the side of the accessory receiving portion adjacent to the auxiliary orthodontic device cooperates with the outer surface of the auxiliary orthodontic device to produce an orthodontic effect, so as to better realize the receiving and mutual cooperation, thereby achieving the orthodontic effect.

[0126] During the process of invisible orthodontic treatment, conventional attachments are usually required to assist in the treatment. Therefore, the shell-shaped orthodontic appliance is also provided with one or more second attachment receptacles (not shown in the figure) to accommodate dental orthodontic attachments. The specific dental orthodontic attachments can be set according to the actual treatment needs.

[0127] Please see Figure 15 This embodiment also provides a set of orthodontic appliances, including a first orthodontic appliance and a second orthodontic appliance for wearing on the first dentition and the opposing dentition, respectively. The first orthodontic appliance includes a first shell-shaped orthodontic appliance 1101 and a plurality of auxiliary orthodontic devices 12 and fasteners 13 associated with it. The second orthodontic appliance includes a second shell-shaped orthodontic appliance 1102 and a plurality of auxiliary orthodontic devices 12 and fasteners 13 associated with it. The auxiliary orthodontic devices can be selected from any suitable shape and structure in the above embodiments. The first shell-shaped orthodontic appliance 1101 is any of the shell-shaped orthodontic appliances described above. The first shell-shaped orthodontic appliance can be worn on the maxilla or mandible. When the first shell-shaped orthodontic appliance is worn on the maxilla, the second shell-shaped orthodontic appliance is worn on its opposing dentition, i.e., the mandible. Figure 15The second shell-shaped orthodontic appliance 1102 shown includes a hollow structure for accommodating the opposing dentition, and the second shell-shaped orthodontic appliance 1102 is also any of the shell-shaped orthodontic appliances described above. The second shell-shaped orthodontic appliance can be worn on the maxilla or mandible. When the second shell-shaped orthodontic appliance is worn on the maxilla, the first shell-shaped orthodontic appliance is worn on its opposing dentition, i.e., the mandibular teeth.

[0128] Furthermore, in the two embodiments described above, the tooth receiving cavity in the first or second shell-shaped orthodontic appliance receives the teeth and provides orthodontic force to move the teeth to be treated without auxiliary orthodontic devices and fasteners from a first position to a second position. The auxiliary orthodontic device receiving part and the fastener receiving part included in the first or second shell-shaped orthodontic appliance are respectively used to receive the auxiliary orthodontic device and the fastener. Teeth equipped with the auxiliary orthodontic device and the fastener are moved from the first position to the second position by the orthodontic force provided by the fastener, or the orthodontic force jointly provided by the auxiliary orthodontic device and the fastener, or the orthodontic force jointly provided by the auxiliary orthodontic device, the fastener and the tooth receiving cavity.

[0129] Please see Figure 16a and Figure 16b This embodiment also provides an orthodontic system, including a first orthodontic appliance set 1, a plurality of intermediate orthodontic appliance sets (2…N-1) and a final orthodontic appliance set N, wherein at least one orthodontic appliance set is an orthodontic appliance set as described above.

[0130] More specifically, the orthodontic system includes multiple sets of orthodontic appliances that can be used as follows: Figure 16a The upper and lower jaws shown are both orthodontic appliance sets including shell-shaped orthodontic appliances 1201 and 1202, auxiliary orthodontic devices 12, and fasteners 13. Alternatively, they can be as follows: Figure 16b The single jaw shown uses an orthodontic appliance kit including shell-shaped orthodontic appliances 1101 and 1102, auxiliary orthodontic device 12, and fastener 13. The opposing teeth are only fitted with shell-shaped orthodontic appliances, or in combination with auxiliary orthodontic devices and fasteners that are bonded to the tooth surface.

[0131] In one embodiment, multiple orthodontic appliance sets, whether for single or double jaws, use an appliance set including a shell-shaped orthodontic appliance, an auxiliary orthodontic device, and fasteners. The following orthodontic methods can be employed: 1) When the auxiliary orthodontic device functions as an attachment, it cooperates with the auxiliary orthodontic device receiving portion on the shell-shaped orthodontic appliance to gradually move the teeth from a first position to a second position; 2) When the auxiliary orthodontic device functions as a bracket, the auxiliary orthodontic device interacts with the fasteners to gradually move the teeth from the first position to the second position; 3) When the auxiliary orthodontic device simultaneously functions as an attachment and a bracket, the interaction between the auxiliary orthodontic device and the fasteners generates a first orthodontic force, and the interaction between the auxiliary orthodontic device and the auxiliary orthodontic device receiving portion on the shell-shaped orthodontic appliance generates a second orthodontic force. The first and second orthodontic forces compensate for each other, working together to gradually move the teeth from the first position to the second position. The three implementation methods described above can be combined and reused in different sequences according to actual orthodontic needs. More specifically, for example, firstly, the interaction between the auxiliary orthodontic device and the auxiliary orthodontic device housing on the shell-shaped orthodontic appliance can move the teeth from their initial position to the first intermediate orthodontic position. At this point, the interaction between the shell-shaped orthodontic appliance and the teeth cannot achieve subsequent orthodontic treatment. Therefore, fasteners are inserted into the auxiliary orthodontic device to generate orthodontic force between the auxiliary orthodontic device and the fasteners. At this time, the auxiliary orthodontic device may or may not generate an interaction force with the auxiliary orthodontic device housing on the shell-shaped orthodontic appliance, thus moving the teeth to the correct orthodontic position. If the second intermediate orthodontic position is the target orthodontic position, then no further orthodontic treatment is required. If the second intermediate orthodontic position is not the target orthodontic position, then the auxiliary orthodontic device can interact with the auxiliary orthodontic device holder on the shell-shaped orthodontic appliance to generate orthodontic force to continue the treatment to the target position. Alternatively, the first orthodontic force generated by the interaction between the auxiliary orthodontic device and the fastener, and the second orthodontic force generated by the interaction between the auxiliary orthodontic device and the auxiliary orthodontic device holder on the shell-shaped orthodontic appliance can be used. The first and second orthodontic forces compensate for each other and work together to gradually move the teeth from the second intermediate orthodontic position to the target orthodontic position.Another approach is for cases of severe intraoral malocclusion. Based on the actual treatment needs, auxiliary orthodontic appliances can be attached to the teeth, with fasteners inserted between adjacent appliances. The auxiliary appliances initially function as brackets, gradually shifting the teeth from their initial position to the intermediate orthodontic position. This intermediate position is particularly suitable for shell-type orthodontic appliances. In this case, the shell-type appliance can be worn or not. The shell-type appliance and auxiliary appliances can either interact without generating any corrective force or generate a synergistic corrective force. This force can be digitally designed according to the treatment requirements. Afterward, the fasteners inserted into the auxiliary appliances can be removed, and the shell-type appliance can be worn directly. The interaction between the auxiliary appliances and the receiving portion of the shell-type appliance generates corrective force, gradually shifting the teeth from the intermediate orthodontic position to the target orthodontic position.

[0132] The above-mentioned combined application scenarios are applicable to cases such as preventing axial tilt in tooth extraction cases, severe malocclusion, and leveling the Spee curve. For example, in cases involving the extraction of the first premolar, an auxiliary orthodontic appliance is attached to the canine. In the early stages of treatment, the auxiliary appliance acts as an accessory, working in conjunction with the shell-shaped orthodontic appliance to move the canine distally. If it is necessary to accelerate the distal movement of the canine, an auxiliary appliance can also be attached to the second premolar. Archwires for fastening are inserted into the auxiliary appliances placed on the canine and the second premolar, and rubber chains can also be used to assist in pulling the canine distally. Later, during the canine distalization and anterior tooth retraction stages, auxiliary appliances are attached to the first and second molars. The auxiliary appliances attached to the second premolar, the first molar, and the second molar are interwoven with archwires to form a single segmental arch, preventing the teeth in the posterior region from tilting mesially (i.e., axial tilting). For example, in cases of severely rotated, misaligned, tilted, or low-positioned teeth, more specifically, such as a 90-degree rotation of the maxillary second premolar or a mesial tilt of the mandibular first and second molars, auxiliary orthodontic appliances are attached to the first to second molars of both the upper and lower jaws, with archwires inserted within them. This allows the misaligned teeth to gradually change from their initial position to an intermediate orthodontic position. Then, under the combined action of the shell-shaped orthodontic appliance, the auxiliary orthodontic appliance, and the fasteners, the teeth achieve de-rotation and vertical movement. Then, the next stage and subsequent N shell-shaped orthodontic appliances interact with the auxiliary orthodontic appliance and fasteners respectively until the teeth are completely rotated and vertically moved to the target orthodontic position. For example, in cases of cusp-fossa docking after Spee curve flattening, occlusal pads are typically used to assist in Spee curve flattening. In the initial stage of treatment, an auxiliary orthodontic appliance is attached between the first premolar and the second molar. The auxiliary orthodontic appliance serves only as an accessory, interacting with the auxiliary orthodontic appliance housing on the shell-shaped dental appliance. At this time, the posterior open bite is relatively large. Subsequently, archwires are inserted into the aforementioned auxiliary orthodontic appliance, and vertical traction between the jaws is used to accelerate the flattening of the Spee curve and the vertical cusp-fossa docking of the upper and lower posterior teeth. This achieves efficient flattening of the mandibular Spee curve and accelerates the cusp-fossa docking of the posterior teeth.

[0133] The orthodontic system provided by this invention can also be used to treat tooth extraction cases of alveolar skeletal facial deformities. Specifically, the method involves first wearing a shell-shaped orthodontic appliance to achieve initial alignment and leveling of the teeth. Then, during the anterior tooth retraction phase, an auxiliary orthodontic device is attached to the posterior teeth region, with a fastening archwire inserted within it. This makes the posterior teeth region a unified whole, effectively enhancing the posterior tooth anchorage and thus preventing mesial movement and tilting of the posterior teeth during anterior tooth retraction.

[0134] It should be noted that the above embodiments can be freely combined as needed. The above description is only a preferred embodiment of the present invention. It should be pointed out that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. An orthodontic appliance, characterized by, The application relates to a shell-shaped tooth appliance, which comprises tooth receiving cavities for accommodating teeth, wherein a plurality of the tooth receiving cavities are in communication; auxiliary correction devices are arranged on at least two of the teeth; each of the auxiliary correction devices is provided with at least one passage allowing a fastener to pass through and capable of fixing the fastener; the fastener can pass through the passage of the auxiliary correction device and connect at least two of the auxiliary correction devices; the shell-shaped tooth appliance cooperates with the auxiliary correction devices and the fastener to move the plurality of teeth from a first position to a second position; wherein the tooth receiving cavities of the shell-shaped tooth appliance accommodate teeth and provide correction force for moving the teeth without auxiliary correction devices and fasteners from a first position to a second position; the shell-shaped tooth appliance further comprises auxiliary correction device accommodating portions and fastener accommodating portions for accommodating the auxiliary correction devices and the fasteners respectively, the auxiliary correction device accommodating portions and the fastener accommodating portions are in communication with the tooth receiving cavities, the teeth provided with the auxiliary correction devices and the fasteners are moved from a first position to a second position by correction force provided by the fastener, or correction force provided by the auxiliary correction devices and the fasteners, or correction force provided by the auxiliary correction devices, the fasteners and the tooth receiving cavities; wherein the auxiliary correction device comprises a reference portion capable of being fixed on a tooth surface, and a correction portion extending from the reference portion to a side away from the tooth surface and cooperating with the shell-shaped tooth appliance, wherein the correction portion is at least partially accommodated in an auxiliary correction device accommodating portion corresponding to the correction portion in the shell-shaped tooth appliance, and the correction portion is provided with at least one passage allowing the fastener to pass through and capable of fixing the fastener, and the outer contour of the correction portion at least partially matches the outer contour of an accessory capable of cooperating with the auxiliary correction device accommodating portion to correct teeth, so that the auxiliary correction device has basically the same correction effect as the accessory; the passage is an internal perforation arranged in the correction portion along a mesial-distal direction and / or a groove arranged on the outer surface of the correction portion along the mesial-distal direction; the passage does not intersect the reference portion; when the passage is the internal perforation, the distance between the internal perforation and the reference portion is not less than the distance between the internal perforation and the outer surface of the correction portion; when the auxiliary correction device is provided with both the internal perforation and the groove, the internal perforation is arranged at a position closer to the reference portion than the groove; the cross section of the internal perforation along the labial / buccal and lingual sides is circular, semicircular, elliptical, semi-elliptical, polygonal or a combination of the above shapes. ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 2. The orthodontic appliance of claim 1, wherein, ​ 3. The orthodontic appliance of claim 1, wherein, ​ 4. The orthodontic appliance of claim 3, wherein, ​ 5. The orthodontic appliance of claim 1, wherein, ​ 6. The orthodontic appliance of claim 5, wherein, When the cross section of the built-in perforation along the labial / buccal lingual side is circular, the diameter of the cross section is 0.25mm-0.78mm; when the cross section of the built-in perforation along the labial / buccal lingual side is square / rectangular / regular hexagonal, the side length of the cross section is 0.40-0.72mm.

7. The orthodontic appliance of claim 1, wherein, The cross section of the groove along the labial / buccal lingual side is one of circular arc, semi-circular arc, elliptical arc, semi-elliptical arc, polygon, or one of the combinations of the above shapes.

8. The orthodontic appliance of claim 1, wherein, When the auxiliary orthodontic device is provided with both the built-in perforation and the groove, the line connecting the center of the cross section of the built-in perforation along the labial / buccal lingual side and the center of the cross section of the groove along the labial / buccal lingual side is not perpendicular to the long axis of the tooth fixed by the auxiliary orthodontic device.

9. The orthodontic appliance of claim 8, wherein, The angle α formed between the line connecting the center of the cross section of the built-in perforation along the labial / buccal lingual side and the center of the cross section of the groove along the labial / buccal lingual side and the long axis of the tooth fixed by the auxiliary orthodontic device is an acute angle.

10. The orthodontic appliance of claim 9, wherein, The angle α formed between the line connecting the center of the cross section of the built-in perforation along the labial / buccal lingual side and the center of the cross section of the groove along the labial / buccal lingual side and the long axis of the tooth fixed by the auxiliary orthodontic device is 30°-60°.

11. The orthodontic appliance of claim 1, wherein, The number of the built-in perforation and / or the groove is at least one.

12. The orthodontic appliance of claim 1, wherein, The reference part is a planar structure or a curved structure that is fitted to the tooth surface.

13. The orthodontic appliance of claim 12, wherein, When the reference part is a planar structure, the built-in perforation and / or the groove are arranged parallel to the reference part along the mesial-distal direction.

14. The orthodontic appliance of claim 12, wherein, When the reference part is a curved structure that is fitted to the tooth surface, the curvature of the reference part is consistent with the curvature of the built-in perforation and / or the groove along the mesial-distal direction.

15. The orthodontic appliance of claim 1, wherein, The reference part is further provided with a surface structure that increases friction near the tooth side.

16. The orthodontic appliance of claim 1, wherein, In the cross section of the auxiliary orthodontic device along the labial / buccal lingual side, the length of the auxiliary orthodontic device excluding the channel is 0.2mm-4.0mm.

17. The orthodontic appliance of claim 1, wherein, The profile of the lower end of the auxiliary orthodontic device adjacent to the gum line side extending to the occlusal surface side is a smooth transition inclined curved surface.

18. The orthodontic appliance of any one of claims 2-17, wherein, The auxiliary orthodontic device is further provided with an auxiliary accommodating part that accommodates an auxiliary orthodontic member near the occlusal surface side and / or near the gum line side.

19. The orthodontic appliance of claim 18, wherein, The auxiliary accommodating part is an accommodating groove that is recessed towards the center of the auxiliary orthodontic device.

20. The orthodontic appliance of claim 19, wherein, The accommodating groove is arranged symmetrically with one on each of the occlusal surface side and the gum line side.

21. The orthodontic appliance of claim 1, wherein, The outer profile of the orthodontic part is at least partially consistent with the outer profile of an accessory that can cooperate with the auxiliary accommodating part of the auxiliary orthodontic device to perform tooth orthodontic treatment, so that the auxiliary orthodontic device also has the same orthodontic effect as the accessory.

22. The orthodontic appliance of claim 1, wherein, The outer profile of the orthodontic part is consistent with the outer profile of an accessory that can cooperate with the auxiliary accommodating part of the auxiliary orthodontic device to perform tooth orthodontic treatment, so that the auxiliary orthodontic device also has substantially the same orthodontic effect as the accessory.

23. The orthodontic appliance of claim 1, wherein, The outer profile of the orthodontic part is consistent with the outer profile of an accessory that can cooperate with the auxiliary accommodating part of the auxiliary orthodontic device to perform tooth orthodontic treatment, so that the auxiliary orthodontic device also has the same orthodontic effect as the accessory.

24. The orthodontic appliance of claim 19, wherein, The auxiliary orthodontic device accommodating portion of the shell-shaped tooth appliance is adjacent to one side of the auxiliary orthodontic device and cooperates with the outer surface of the auxiliary orthodontic device to generate an orthodontic effect.

25. The orthodontic appliance of claim 1, wherein, The fastener accommodating portion on the shell-shaped tooth appliance is located between adjacent auxiliary orthodontic device accommodating portions and is in communication between the adjacent auxiliary orthodontic device accommodating portions.

26. The orthodontic appliance of claim 25, wherein, In the shell-shaped tooth appliance, when a plurality of auxiliary orthodontic device accommodating portions are provided, the two ends of the communication space formed by the auxiliary orthodontic device accommodating portions and the fastener accommodating portion are also provided with auxiliary fastening portions that accommodate the end portions of the fasteners and assist in fastening the fasteners.

27. The orthodontic appliance of claim 1, wherein, In the shell-shaped tooth appliance, the cross section of the fastener accommodating portion along the labial / lingual-buccal side is one of a circular arc, an elliptical arc, or a polygon.

28. The orthodontic appliance of claim 1, wherein, The shell-shaped tooth appliance is also provided with an accessory accommodating portion that accommodates a dental orthodontic accessory.

29. An appliance set comprising a first orthodontic appliance and a second orthodontic appliance to be worn on a first dentition and a counter-dentition, respectively, characterized in that, The first orthodontic appliance is the orthodontic appliance of any one of claims 1-28.

30. The set of orthodontic appliances of claim 29, wherein, The second orthodontic appliance comprises a shell-shaped tooth appliance comprising a cavity structure accommodating the opposite dental arch.

31. The set of orthodontic appliances of claim 29, wherein, The second orthodontic appliance is the orthodontic appliance of any one of claims 1-28.

32. An orthodontic system comprising a first aligner kit, a plurality of intermediate aligner kits, and a final aligner kit, wherein, At least one set of appliance sets is the appliance set of any one of claims 29-31.

33. An orthodontic system comprising a plurality of orthodontic appliances, wherein, At least one orthodontic appliance is the orthodontic appliance of any one of claims 1-28.

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