Muscle agonist and manufacturing method thereof

Abstract

The muscle activator comprises an upper jaw part and a lower jaw part, the upper jaw part and the lower jaw part are connected through a connecting part, and the upper jaw part, the lower jaw part and the connecting part are integrally manufactured; the upper jaw part at least wraps upper jaw anterior teeth, and the lower jaw part at least wraps lower anterior teeth. The invention further discloses a manufacturing method of the muscle agonist, and particularly discloses a 3D printing method. The retention effect is better, direct control over movement of the upper anterior teeth is increased, and limitation to the position of the lower jaw is higher; and the manufacturing process of the muscle agonist is greatly simplified, the muscle agonist manufactured through direct 3D printing can be directly and integrally formed after design, and compared with an existing manual manufacturing method, the manufacturing method has the advantage that the manufacturing process is greatly simplified.

Description

Technical Field

[0001] The present invention relates to the field of medical devices, and in particular to a myoelectric actuator and a manufacturing method thereof. Background Art

[0002] The activator was designed by Andresen in 1908, so it is also called the Andresen appliance. Subsequently, it has been continuously improved and perfected in the long-term clinical application process. It is mainly used to correct Angle's Class II malocclusion during the peak of puberty. The activator controls tooth eruption while moving the mandible forward, thereby adjusting the sagittal relationship between the upper and lower jaws. The activator can also be used to treat Angle's Class III Division 2, Angle's Class III, and open bite deformity, but it is not suitable for Angle's Class I cases of crowded dentition and maxillary protrusion.

[0003] The main body of the existing activator is a plastic base without a specific retention device or a force-adding device that generates mechanical force. The maxillary part of the base can cover the entire upper palate (or not), with the end reaching the distal end of the first permanent molar; the mandibular part can extend downward to the bottom of the mouth, and the posterior part reaches the distal end of the lingual surface of the mandibular molar. The bases of the upper and lower jaw parts are connected to form a plastic cap for the lower incisor in the anterior area, guiding the mandible to move forward and hindering the vertical eruption of the lower incisor. The degree of wrapping of the plastic cap of the lower incisor on the lower incisor determines its movement mode. If the wrapping degree of the plastic cap exceeds 1 / 3 of the length of the crown of the lower incisor, it can prevent the labial tilting of the lower anterior teeth caused by the activator; if the wrapping degree is less than 1 / 3 of the crown of the lower incisor, it may cause the labial tilting of the lower anterior teeth after correction.

[0004] To further strengthen the control of the upper front teeth, traditional muscle activators also use hard stainless steel wire with a diameter of 0.9-1.0mm to bend it into a common hyperbolic lip bow. The lip bow can transmit the correction force of the muscles to the upper front teeth. If the base of the alveolar part of the palatal side of the upper front teeth is adjusted and ground, the upper front teeth will tilt and move toward the palate under the influence of the lip bow.

[0005] The existing method for manufacturing a muscle activator comprises the following steps:

[0006] (1) Making a plaster model;

[0007] (2) Draw the labial arch and palatal arch wires;

[0008] (3) Use wax-up to leave room for mandibular teeth to grow;

[0009] (4) bending the labial and palatal arches;

[0010] (5) Making a wax-up of the base edge;

[0011] (6) Immersion model;

[0012] (7) Applying self-curing base resin;

[0013] (8) Wait for solidification before polishing;

[0014] Existing muscle activators have the following defects:

[0015] (1) Structural defects

[0016] A. Poor retention effect. Traditional muscle activators have no retention effect by themselves, and only rely on the interaction between the upper and lower jaws and the muscle activators to achieve retention.

[0017] B. Poor control over teeth. Traditional activators have no control over the retraction of the upper front teeth, and require the help of a hyperbolic lip bow to achieve further control over the upper front teeth. The bending process of the hyperbolic lip bow is complicated, which further increases the manufacturing cost of the activator.

[0018] (2) Defects in the manufacturing method: The manufacturing method of traditional muscle activators is very complicated, involving multiple processes, taking a long time to make, high cost, and difficult to replace. Summary of the invention

[0019] In order to overcome the above-mentioned defects, the present invention aims to provide a muscle activator and a manufacturing method thereof, which can enhance the retention effect, realize direct control of the movement of the upper front teeth, and greatly simplify the manufacturing process of the muscle activator.

[0020] To achieve the above purpose, the technical solution adopted by the present invention is as follows:

[0021] Firstly, in terms of structure, the present invention discloses a muscle activator, comprising an upper jaw part and a lower jaw part, wherein the upper jaw part and the lower jaw part are connected by a connecting part, and the upper jaw part, the lower jaw part and the connecting part are manufactured in one piece;

[0022] The maxillary portion at least covers the maxillary front teeth, and the mandibular portion at least covers the lower front teeth.

[0023] As a preferred embodiment, the maxillary part includes clinical crowns A corresponding one-to-one to the upper front teeth or the entire maxillary dentition, and the mandibular part includes clinical crowns B corresponding one-to-one to the lower front teeth or the entire mandibular dentition;

[0024] The inner wall of the clinical crown A fits with the outer wall of the corresponding upper teeth, and the inner wall of the clinical crown B fits with the outer wall of the corresponding lower front teeth.

[0025] As another preferred embodiment, the maxillary part includes clinical crowns A corresponding to the upper front teeth or the entire maxillary dentition, and the mandibular part includes clinical crowns B corresponding to the lower front teeth or the entire mandibular dentition;

[0026] A gap is left between the clinical crown A of the activator and the corresponding upper teeth and / or between the clinical crown B and the corresponding lower teeth, which is beneficial to the movement of the upper teeth and / or lower teeth.

[0027] As a preferred embodiment, the connecting portion is a stress dispersion structure, and the stress dispersion structure is one of the following three forms:

[0028] Method 1: The clinical crown B corresponding to the lower front teeth is connected to the clinical crown A closest to itself through a connecting rod and / or is respectively connected to two clinical crowns A closest to itself through two connecting rods, and the adjacent connecting rods are not parallel;

[0029] Method 2: All clinical crowns B are connected to the clinical crown A closest to them through a connecting rod and / or are respectively connected to two clinical crowns A closest to them through two connecting rods, and adjacent connecting rods are not parallel;

[0030] Mode three: the stress dispersion structure is a hollow structure.

[0031] As another preferred embodiment, the connecting portion is an integral structure, the bottom of the connecting portion is connected to the top of the clinical crown B corresponding to the mandibular anterior teeth and the occlusal surface of the clinical crown B corresponding to the mandibular posterior teeth, and the top of the connecting portion is connected to the bottom of the clinical crown A of the maxillary anterior teeth and the occlusal surface of the clinical crown A of the maxillary posterior teeth.

[0032] As a preferred embodiment, the maxillary part and the mandibular part are located so that the incisal edges of the maxillary dentition are directly opposite to the incisal edges of the mandibular dentition, and the vertical distance between the maxillary dentition and the mandibular dentition is adjustable.

[0033] As another preferred embodiment, the upper jaw part and the lower jaw part are located so as to move the lower jaw as a whole forward by a predetermined distance.

[0034] Furthermore, the clinical crowns A and B corresponding to the canines are provided with rectangular attachments for retention.

[0035] Preferably, the upper jaw part, the lower jaw part and the connecting part are all made of resin, preferably a flexible resin.

[0036] Secondly, in terms of manufacturing methods, the manufacturing methods of the activator disclosed in the present invention include 3D printing, casting, hot pressing or injection molding.

[0037] Among them, 3D printing includes the following steps performed in sequence:

[0038] s1. Establish oral digital model: Reconstruct the digital 3D model of the patient's oral cavity based on the patient's oral data;

[0039] s2. Generate a digital treatment plan: In the digital plan, the digital three-dimensional model is used to simulate the movement of the mandible, so that the mandible is moved forward to the tangential position, and a target position oral model is obtained;

[0040] s3. Generate myoelectric activator model:

[0041] Use one of the following methods:

[0042] Method 1: Based on the target oral model, the maxillary part of the muscle activator model covering the maxillary dentition and the mandibular part of the muscle activator model covering the mandibular anterior teeth are generated respectively, and the muscle activator model is derived;

[0043] Method 2: Based on the target oral model, the maxillary part of the activator model covering the maxillary dentition and the mandibular part of the activator model covering the mandibular anterior teeth are generated respectively, and the connecting part between the upper and lower mandibular parts of the activator is designed using CAD modeling technology. The maxillary part, connecting part, and mandibular part models of the activator are integrated into an integrated model to export the activator model.

[0044] s4. Printing: According to the myoelectric actuator model, the myoelectric actuator is printed using resin material by using light-curing 3D printing technology;

[0045] For the activator model generated by method 1, a self-curing resin is used to make a connecting part after printing, and the upper jaw part and the lower jaw part of the activator are bonded together.

[0046] Furthermore, in step s2, the reconstructing the digital three-dimensional model of the patient's oral cavity includes adding a digital tooth arrangement design for orthodontic correction of tooth movement.

[0047] Preferably, in step s1, the patient's oral data is CBCT and / or oral scan data.

[0048] Furthermore, in step s3, the connection area between the upper jaw part, the connection part and the lower jaw part is smoothed.

[0049] The beneficial effects of the present invention are as follows:

[0050] 1. Stronger retention effect. The traditional muscle activator itself has no retention effect and only relies on the interaction between the upper and lower jaws and the muscle activator to achieve retention. The muscle activator involved in the present invention can achieve a complete fit with the crown and achieve a better retention effect through the structure of the appliance.

[0051] 2. Direct control of the movement of the upper front teeth. In order to transmit force to the upper front teeth, the traditional muscle activator needs to use an induction wire to bend a hyperbolic labial arch. The muscle activator involved in the present invention completely wraps the clinical crown of the upper front teeth and can control the labial and lingual movement of the upper front teeth without using an induction wire.

[0052] 3. Stronger restrictions on the position of the mandible. The traditional design has limited restrictions on the lower front teeth, and there is still room for the mandible to move. The present invention wraps the lower front teeth to completely fix the positions of the upper and lower jaws, thereby achieving better restrictions on the position of the mandible.

[0053] 4. The present invention can control the vertical height of the maxillary and mandibular posterior teeth, and different implementation methods can be used to meet the needs of vertical control of the posterior teeth in high-angle, low-angle and even-angle cases.

[0054] 5. The present invention can reduce the inter-mandibular force through the stress dispersion structure, providing a gentler traction force for mandibular advancement. In order to prevent the traction force of mandibular advancement from being too large, the traditional muscle activator needs to design the mandibular advancement process into multiple steps according to the advancement amount, and each step moves a certain distance. However, the light traction force provided by the stress dispersion of this patent can greatly increase the amount of mandibular advancement involved, effectively improving the treatment efficiency.

[0055] 6. The manufacturing process of the muscle activator has been greatly simplified. The muscle activator produced by direct 3D printing can be directly formed in one piece after design, which is greatly simplified compared to the traditional manual production method.

[0056] 7. Teeth correction can be performed simultaneously. The direct 3D printed activator can be combined with the tooth arrangement plan during design. While achieving mandibular advancement and controlling tooth eruption, it can also achieve tooth movement for orthodontic correction. BRIEF DESCRIPTION OF THE DRAWINGS

[0057] Figure 1 This is a schematic diagram of the structure of Example 1.

[0058] Figure 2 for Figure 1 Left view of .

[0059] Figure 3 This is a schematic diagram of the structure of Example 2.

[0060] Figure 4 This is a schematic diagram of the structure of Example 3.

[0061] Figure 5 This is a schematic diagram of the structure of Example 4.

[0062] Figure 6 This is a schematic diagram of the structure of Example 5.

[0063] Figure 7 This is a schematic diagram of the structure of Example 6.

[0064] Figure 8 This is a schematic diagram of the structure of Example 7.

[0065] Fig. 9Schematic diagram of displacement of digital tooth arrangement designed for orthodontic correction to increase tooth movement. DETAILED DESCRIPTION

[0066] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings.

[0067] Example 1

[0068] This embodiment discloses a muscle activator, see Figure 1 , Figure 2 , as follows:

[0069] This embodiment can use a resin material that is similar to or exactly the same as the invisible braces and retainers used clinically, and can be integrally formed without the need to use other connecting materials or manufacturing processes.

[0070] Its structure is an integrated upper and lower jaw, wherein the maxillary part 1 covers the complete maxillary dentition, including a clinical crown A11 corresponding to the maxillary dentition, the end of which extends to the distal end of the molar, and the inner wall of the clinical crown A11 is in close contact with the outer wall of the maxillary dentition; the mandibular part 2 covers the lower front tooth area, namely the central incisor, lateral incisor and canine, and the mandibular part 2 includes a clinical crown B21 corresponding to the lower front teeth, and the inner wall of the clinical crown B2 is in close contact with the outer wall of the lower front teeth.

[0071] The maxillary portion 1 and the mandibular portion 2 are located so that the incisal edges of the maxillary dentition are directly opposite to the incisal edges of the mandibular dentition.

[0072] The connecting part 3 is a stress dispersion structure. The stress dispersion structure of this embodiment is: the clinical crown B21 is connected to the clinical crown A closest to itself through a connecting rod 31 and / or is connected to two clinical crowns A11 closest to itself through two connecting rods 31 respectively, and adjacent connecting rods 31 are not parallel.

[0073] The resin material may be a hard resin or a flexible resin; or the upper jaw part 1 and the lower jaw part 2 may be made of a hard resin, and the connecting part 3 may be made of a flexible resin.

[0074] The mandibular portion 2 of this embodiment is designed to be in a forward and downward protruding position, that is, the mandibular anterior teeth area is in a position directly opposite to the incisal end direction of the teeth in the maxillary anterior teeth area. The maxillary portion 1 is configured to lower the upper anterior teeth for tooth movement. Since it completely wraps the maxillary dentition, the maxillary portion 1 can be used to guide the mandibular forward movement. The reaction force generated during the mandibular forward movement acts on the upper dental arch through the muscle activator, which in turn generates an adduction force on the upper anterior teeth, thereby achieving the therapeutic effect of mandibular forward movement and lowering and adducting the maxillary anterior teeth.

[0075] The maxillary anterior and posterior teeth and the lower front teeth are completely covered by the muscle activators. Under the action of the mouth-closing muscles, the upper and lower front teeth tend to be maintained or depressed. The lower posterior teeth are not covered, which is conducive to natural extension and the realization of open bite.

[0076] This embodiment is mainly applicable to clinical cases that require the treatment purpose of raising the posterior teeth and advancing the mandible, such as low-angle cases.

[0077] Example 2

[0078] This embodiment discloses a muscle activator, such as Figure 3 As shown, the difference between this embodiment and embodiment 1 lies in the mandibular part 2. The mandibular part 2 of this embodiment covers the complete mandibular dentition. The mandibular part 2 is provided with a clinical crown B21 corresponding to the entire mandibular dentition, and the end extends to the distal end of the molar.

[0079] In this embodiment, the mandibular part 2 is provided with a tooth movement for leveling the occlusal curve, and the mandibular front is moved forward to achieve alignment. The maxillary part 1 is provided with a tooth movement for lowering the upper front teeth. Since the maxillary dentition is completely wrapped, the maxillary part 1 can be used to guide the mandibular front movement. The reaction force generated during the mandibular front movement acts on the upper dental arch through the muscle activator, and an inward force is generated on the upper front teeth, thereby achieving the therapeutic effect of mandibular front movement and upper front teeth inward movement.

[0080] At this time, the upper and lower anterior teeth and posterior teeth are all wrapped by the mandibular part of the muscle activator, and there is an interactive connection part 3. Under the action of the mouth closing muscles, the height of the posterior teeth can be maintained. At the same time, the tooth movement of the Spee curve of the upper anterior teeth lowering and the mandibular leveling is set in the orthodontic appliance, which can achieve the effect of reverse rotation of the upper occlusal plane and leveling of the lower occlusal plane, and finally open the bite and reverse rotation of the mandible.

[0081] This embodiment is mainly applicable to clinical cases with high angles, which require the treatment purpose of reverse rotation of the maxillary plane, flattening of the mandibular spee curve, reverse rotation of the mandible and advancement of the mandible.

[0082] The other parts of this embodiment are the same as those of Embodiment 1, and thus will not be described in detail.

[0083] Example 3

[0084] This embodiment discloses a muscle activator, such as Figure 4 As shown, the difference between this embodiment and embodiment 2 lies in the stress dispersion structure. In this embodiment, only the clinical crown B21 corresponding to the lower front teeth is connected to the corresponding clinical crown A11 through the connecting rod 31.

[0085] The maxillary part 1 is set to move the upper front teeth downward. Since it completely covers the maxillary dentition, the maxillary part 1 can be used to guide the mandibular forward movement. The reaction force generated during the mandibular forward movement acts on the upper dental arch through the muscle activator, and generates an inward force on the upper front teeth, thereby achieving the treatment effect of overall forward movement of the mandible and inward retraction of the maxillary front teeth.

[0086] At this time, the mandibular anterior teeth and posterior teeth are both wrapped by the mandibular part of the muscle activator. Since the connecting part is located between the upper and lower anterior teeth, under the action of the mouth closing muscles, the upper and lower anterior teeth tend to maintain or be depressed. The orthodontic appliance is set inside to level the longitudinal occlusal curve of the upper and lower jaws.

[0087] This embodiment is mainly applicable to clinical cases where the posterior teeth are raised by lowering the anterior teeth and the mandible needs to be advanced for treatment purposes, such as cases with even angles.

[0088] The other parts of this embodiment are the same as those of Embodiment 2, and thus will not be described in detail.

[0089] Example 4

[0090] This embodiment discloses a muscle activator, such as Figure 5 As shown, the difference between this embodiment and embodiment 1 lies in the maxillary part 1. The maxillary part 1 of this embodiment only covers the maxillary anterior teeth. The maxillary part 1 only has clinical crowns A11 corresponding to the maxillary anterior teeth one by one. There is no contact between the maxillary and mandibular posterior teeth, which can promote the eruption of the upper and lower posterior teeth.

[0091] The other parts of this embodiment are the same as those of Embodiment 1, and thus will not be described in detail.

[0092] Example 5

[0093] The muscle activator disclosed in this embodiment is different from that of Embodiments 1, 2 or 3 in the positional relationship between the maxillary part 1 and the mandibular part 2. The maxillary part 1 and the mandibular part 2 of this embodiment are in a position to move the entire mandible forward a predetermined distance.

[0094] In this embodiment, the same activator can be configured in multiple configurations, with different predetermined distances set, such as Figure 6 As shown, the mandibular advancement is divided into multiple steps, and each pair of muscle activators is set with a certain mandibular advancement amount until the incisal edge of the maxillary dentition is opposite to the incisal edge of the mandibular dentition.

[0095] Example 6

[0096] like Figure 7 As shown, the activator disclosed in this embodiment is different from embodiments 1, 2, 3, 4 or 5 in that the clinical crowns A11 and B21 corresponding to the canines are provided with rectangular attachments 4 for retention. This embodiment can prevent the activator from falling off for patients with shorter crowns.

[0097] Example 7

[0098] like Figure 8 As shown, the muscle activator disclosed in this embodiment is different from the above-mentioned embodiments in the connecting part 3. The connecting part 3 of this embodiment is an integral structure, and the bottom of the connecting part 3 is connected to the top of the clinical crown B21 corresponding to the lower front teeth, and the top of the connecting part 3 is connected to the bottom of the partial clinical crown A11.

[0099] Example 8

[0100] The muscle activator disclosed in the above embodiment can add a traction hook or a buccal tube of the extraoral arch to the canines for patients with severe high angles who need auxiliary implants and extraoral arches, and assist in lowering the front teeth by means of implant traction or extraoral traction.

[0101] Example 9

[0102] This embodiment discloses a 3D printing method for producing a muscle activator applicable to the above embodiment, including the following steps:

[0103] s1. Establishing a digital oral model: reconstructing a digital three-dimensional model of the patient's oral cavity based on the patient's oral cavity data; in this embodiment, the patient's oral cavity data adopts CBCT and / or oral cavity scanning data.

[0104] s2. Generate a digital treatment plan: In the digital plan, the digital three-dimensional model is used to simulate the movement of the mandible, so that the mandible is moved forward to the tangential position, and a target position oral model is obtained;

[0105] s3. Generate myoelectric activator model:

[0106] Use one of the following methods:

[0107] Method 1: Based on the target oral model, the maxillary part of the muscle activator model covering the maxillary dentition and the mandibular part of the muscle activator model covering the mandibular anterior teeth are generated respectively, and the muscle activator model is derived;

[0108] Method 2: Based on the target oral model, the maxillary part of the muscle activator model covering the maxillary dentition and the mandibular part of the muscle activator model covering the mandibular anterior teeth are generated respectively, and the connecting part between the upper and lower mandibular parts of the muscle activator is designed using CAD modeling technology. The maxillary, connecting and mandibular models of the muscle activator are merged into an integrated model, and the connecting areas among the maxillary, connecting and mandibular parts are smoothed to derive the muscle activator model.

[0109] s4. Printing: According to the myoelectric actuator model, the myoelectric actuator is printed using resin material by using light-curing 3D printing technology;

[0110] For the activator model generated by method 1, a self-curing resin is used to make a connecting part after printing, and the upper jaw part and the lower jaw part of the activator are bonded together.

[0111] like Fig. 9 As shown, as an application case, in the digital treatment plan described in step S2, the orthodontic digital tooth arrangement design for tooth movement can be added, and invisible correction and functional correction can be achieved at the same time.

[0112] In addition to the 3D printing production method disclosed in this embodiment, casting, hot pressing, injection molding and other similar molding methods can also be used as production means.

[0113] As an embodiment, dual-material 3D printing technology can be used, that is, the crown covering part uses hard resin to provide stable support with moderate hardness to ensure good retention effect, and the connecting part uses flexible material or elastic photosensitive resin material with low elastic modulus and hardness to improve wearing comfort.

[0114] Of course, the present invention may have many other embodiments. Without departing from the spirit and essence of the present invention, technicians familiar with the field may make various corresponding changes and deformations based on the present invention, but these corresponding changes and deformations should all fall within the scope of protection of the claims attached to the present invention.

Claims

1. A muscle activator, characterized in that: It comprises an upper jaw part and a lower jaw part, wherein the upper jaw part and the lower jaw part are connected by a connecting part, and the upper jaw part, the lower jaw part and the connecting part are manufactured as one piece; The maxillary portion at least covers the maxillary front teeth, and the mandibular portion at least covers the lower front teeth.

2. The muscle activator according to claim 1, characterized in that: The maxillary part includes a clinical crown A corresponding to the upper front teeth or the entire maxillary dentition, and the mandibular part includes a clinical crown B corresponding to the lower front teeth or the entire mandibular dentition; The inner wall of the clinical crown A fits with the outer wall of the corresponding upper teeth, and the inner wall of the clinical crown B fits with the outer wall of the corresponding lower front teeth.

3. The muscle activator according to claim 1, characterized in that: The maxillary part includes a clinical crown A corresponding to the upper front teeth or the entire maxillary dentition, and the mandibular part includes a clinical crown B corresponding to the lower front teeth or the entire mandibular dentition; A gap is left between the clinical crown A of the activator and the corresponding upper teeth and / or between the clinical crown B and the corresponding lower teeth, which is beneficial to the movement of the upper teeth and / or lower teeth.

4. The muscle activator according to claim 2 or 3, characterized in that: The connecting portion is a stress dispersion structure, and the stress dispersion structure is one of the following three types: Method 1: The clinical crown B corresponding to the lower front teeth is connected to the clinical crown A closest to itself through a connecting rod and / or is respectively connected to two clinical crowns A closest to itself through two connecting rods, and the adjacent connecting rods are not parallel; Method 2: All clinical crowns B are connected to the clinical crown A closest to them through a connecting rod and / or are respectively connected to two clinical crowns A closest to them through two connecting rods, and adjacent connecting rods are not parallel; Mode three: the stress dispersion structure is a hollow structure.

5. The muscle activator according to claim 2 or 3, characterized in that: The connecting part is an integral structure, the bottom of the connecting part is connected to the top of the clinical crown B corresponding to the mandibular anterior teeth and the occlusal surface of the clinical crown B corresponding to the mandibular posterior teeth, and the top of the connecting part is connected to the bottom of the clinical crown A of the maxillary anterior teeth and the occlusal surface of the clinical crown A of the maxillary posterior teeth.

6. The muscle activator according to claim 4, characterized in that: The maxillary part and the mandibular part are in positions where the incisal edges of the maxillary dentition are directly opposite to the incisal edges of the mandibular dentition, and the vertical distance between the maxillary dentition and the mandibular dentition is adjustable.

7. The muscle activator according to claim 4, characterized in that: The upper jaw part and the lower jaw part are located so that the lower jaw as a whole moves forward a predetermined distance.

8. The muscle activator according to claim 2 or 3, characterized in that: Clinical crowns A and B corresponding to the canines are provided with rectangular attachments for retention.

9. The muscle activator according to claim 1, characterized in that: The upper jaw part, the lower jaw part and the connecting part are all made of resin, preferably a flexible resin.

10. A method for manufacturing a muscle activator according to claim 2, characterized in that: The manufacturing method is 3D printing, casting, hot pressing or injection molding.

11. The manufacturing method according to claim 9, characterized in that: The 3D printing comprises the following steps performed in sequence: s1. Establish oral digital model: Reconstruct the digital 3D model of the patient's oral cavity based on the patient's oral data; s2. Generate a digital treatment plan: In the digital plan, the digital three-dimensional model is used to simulate the movement of the mandible, so that the mandible is moved forward to the tangential position, and a target position oral model is obtained; s3. Generate myoelectric activator model: Use one of the following methods: Method 1: Based on the target oral model, the maxillary part of the muscle activator model covering the maxillary dentition and the mandibular part of the muscle activator model covering the mandibular anterior teeth are generated respectively, and the muscle activator model is derived; Method 2: Based on the target oral model, the maxillary part of the activator model covering the maxillary dentition and the mandibular part of the activator model covering the mandibular anterior teeth are generated respectively, and the connecting part between the upper and lower mandibular parts of the activator is designed using CAD modeling technology. The maxillary part, connecting part, and mandibular part models of the activator are integrated into an integrated model to export the activator model. s4. Printing: According to the myoelectric actuator model, the myoelectric actuator is printed using resin material by using light-curing 3D printing technology; For the activator model generated by method 1, a self-curing resin is used to make a connecting part after printing, and the upper jaw part and the lower jaw part of the activator are bonded together.

12. The manufacturing method according to claim 11, characterized in that: In step s2, the reconstruction of the digital three-dimensional model of the patient's oral cavity includes adding a digital tooth arrangement design for orthodontic correction of tooth movement.

13. The manufacturing method according to claim 10, characterized in that: In step s1, the patient's oral data is CBCT and / or oral scan data.

14. The manufacturing method according to claim 10, characterized in that: In step s3, the connection area between the upper jaw part, the connection part and the lower jaw part is smoothed.

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