A clear aligner for maxillary protrusion
By setting "︵"-shaped anti-slip grooves on the inner wall of the alveolar bone, using light-cured resin adhesive, and using raised and swirling parts made of elastic material, the problems of poor aesthetics, easy fall-off, and low comfort of invisible aligners in the treatment of maxillary protrusion have been solved, thus improving stability and comfort.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- GUANGZHOU HENGHAO TECHNOLOGY CO LTD
- Filing Date
- 2025-08-14
- Publication Date
- 2026-07-24
AI Technical Summary
Existing invisible aligners have problems such as poor aesthetics, low comfort, easy to fall off, difficult to clean, and easy to be damaged when correcting maxillary protrusion, which affect the orthodontic effect and the patient's wearing experience.
A clear aligner for maxillary protrusion was designed, which features an "︵"-shaped anti-slip groove on the inner wall of the alveolar bone, light-cured resin adhesive, threaded connectors, and protrusions and retractors made of elastic material to enhance stability and comfort.
It effectively prevents the orthodontic appliance from falling off, improves wearing stability, reduces patient discomfort, extends its service life, and enhances the comfort and effectiveness of the orthodontic process.
Smart Images

Figure CN224540337U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of invisible orthodontic appliances, specifically to an invisible orthodontic appliance for maxillary protrusion. Background Technology
[0002] In the field of orthodontics, maxillary protrusion is a common dentofacial deformity that not only affects facial aesthetics but can also lead to functional disorders such as chewing and speech impairment. Traditional metal bracket orthodontic appliances apply corrective force to the teeth by ligating the archwire to the bracket. However, the exposed metal brackets and archwire severely affect aesthetics, often causing psychological burden for patients in social and daily life. Furthermore, the ligature wire can easily scratch the oral mucosa during treatment, causing ulcers and other discomfort, resulting in poor wearing comfort. They are also difficult to clean and can easily lead to enamel demineralization. While ceramic bracket orthodontic appliances offer some improvement in aesthetics, they still require archwire ligation to apply force, resulting in similar difficulties in cleaning and low comfort as traditional metal brackets. Additionally, ceramic is relatively brittle, making brackets prone to breakage during treatment.
[0003] With the optimization of materials and treatment systems for clear aligners, the indications for clear aligners have become increasingly broad, and they can be used for early functional correction, conventional systematic orthodontics, and combined orthodontic and orthognathic treatment. Clear aligners have the advantages of being transparent, comfortable, and removable, and do not affect social activities, eating, or sports. However, during treatment, the aligners are prone to displacement and deformation due to uneven force, which can further affect the treatment effect and the patient's wearing experience. Summary of the Invention
[0004] The technical problem to be solved by this utility model is to provide an invisible orthodontic appliance for maxillary protrusion, which can effectively solve the problems in the prior art.
[0005] The technical solution adopted by this utility model is: an invisible orthodontic appliance for maxillary protrusion, comprising an appliance body and teeth, wherein an alveolar groove is formed on the inner side of the appliance body, a fixing sleeve is fixedly installed on the inner surface of the appliance body, a reinforcing wire is slidably installed on the inner side of the fixing sleeve, an adhesive layer is coated on one end of the fixing sleeve near the appliance body, threaded connectors are fixedly installed on both ends of the reinforcing wire, a threaded cap is provided on the side of the threaded connector away from the reinforcing wire, a protrusion is provided on the top of the appliance body, and a rotating part is provided on the side of the protrusion away from the appliance body.
[0006] Preferably, the inner wall of the tooth socket is provided with anti-slip grooves that are evenly distributed, and the cross-sectional shape of the anti-slip grooves is a "︵" shape.
[0007] By using the above technical solution, the contact friction between the orthodontic appliance and the tooth surface is enhanced by setting an "︵"-shaped anti-slip groove on the inner wall of the alveolar bone. This effectively prevents the appliance from falling off due to oral activity during wear, further ensuring the stability of the orthodontic process and reducing the inconvenience of frequent adjustments to the appliance for the patient.
[0008] Preferably, the adhesive layer is a light-cured resin adhesive.
[0009] The above technical solution uses a light-curing resin adhesive as the bonding layer. This light-curing resin adhesive can cure in a short time, which facilitates the quick fixation of the fixing sleeve to the orthodontic appliance body. Moreover, its high bonding strength ensures that the fixing sleeve is stably fixed during the orthodontic process, prevents the displacement of the reinforcing wire, and ensures the accurate transmission of orthodontic force.
[0010] Preferably, the threaded caps are provided in two identical sets, and both sets of threaded caps are threadedly connected to both sets of threaded connectors.
[0011] By employing the above technical solution, and using two sets of threaded caps connected to both ends of the reinforcing wire, the reinforcing wire can be evenly stressed within the orthodontic appliance, avoiding displacement or loosening of the reinforcing wire due to unilateral stress, and ensuring that the reinforcing wire continues to provide support and assist in correction of the appliance body.
[0012] Preferably, the cross-section of the protrusion is semi-circular, and the cross-section of the swirling part is arc-shaped.
[0013] By using the above technical solution, and by setting the cross-section of the protrusion to be "semi-circular", the edge of the orthodontic appliance body can be reduced to reduce the stimulation of the oral mucosa by the edge of the appliance body when the patient wears it, thus improving the wearing comfort. In addition, the cross-section of the rotating part is "arc-shaped", which can keep the appliance body away from the tooth root and reduce the probability of complications such as oral ulcers.
[0014] Preferably, both the protrusion and the swivel portion are made of elastic material.
[0015] The above technical solution uses elastic materials for both the protrusion and the rotation part, which can buffer the reaction force generated when the teeth move, reduce the patient's discomfort during the orthodontic process, and reduce the risk of damage to the orthodontic appliance due to excessive force, thereby extending the service life of the orthodontic appliance and improving the patient's wearing comfort.
[0016] Compared with the prior art, this utility model provides an invisible orthodontic appliance for maxillary protrusion, which has the following beneficial effects: 1. This invisible aligner for maxillary protrusion reduces irritation to the oral mucosa by featuring a semi-circular protrusion at the top of the aligner body, thus reducing bleeding at the tooth root caused by wearing the aligner. The arc-shaped rotating section keeps the top of the aligner body away from the tooth root, further reducing damage to the patient's oral cavity and improving wearing comfort. Furthermore, the use of elastic materials for both the protrusion and the rotating section buffers the reaction force generated during tooth movement, reducing discomfort during treatment and lowering the risk of damage due to excessive force, thereby extending the aligner's lifespan and further enhancing patient comfort.
[0017] 2. This invisible aligner for maxillary protrusion enhances the contact friction between the aligner and the tooth surface by setting "︵"-shaped anti-slip grooves on the inner wall of the alveolar bone. This effectively prevents the aligner from falling off due to oral activity during wear, further ensuring the stability of the orthodontic process and reducing the inconvenience of frequent adjustments for patients. Attached Figure Description
[0018] Figure 1 This is a schematic diagram of the three-dimensional structure of the present invention. Figure 1 ; Figure 2 This is a schematic diagram of the three-dimensional structure of the present invention. Figure 2 ; Figure 3 This is a schematic diagram of the installation structure of the fixing sleeve and reinforcing wire of this utility model; Figure 4 This is a schematic diagram of the connection structure between the reinforcing wire and the threaded cap of this utility model; Figure 5 This is a cross-sectional structural diagram of the body of the orthodontic appliance of this utility model.
[0019] The components are: 1. Orthodontic appliance body; 2. Alveolar bone; 3. Fixing sleeve; 4. Reinforcing wire; 5. Adhesive layer; 6. Threaded connector; 7. Threaded cap; 8. Protrusion; 9. Rotation part; 10. Teeth; 11. Anti-slip groove. Detailed Implementation
[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model. Example 1
[0021] like Figure 1-5As shown, the present invention provides an invisible orthodontic appliance for maxillary protrusion, comprising an appliance body 1 and teeth 10. An alveolar groove 2 is formed on the inner side of the appliance body 1. A fixing sleeve 3 is fixedly installed on the inner surface of the appliance body 1. A reinforcing wire 4 is slidably installed on the inner side of the fixing sleeve 3. An adhesive layer 5 is coated on one end of the fixing sleeve 3 near the appliance body 1. Threaded connectors 6 are fixedly installed on both ends of the reinforcing wire 4. A threaded cap 7 is provided on the side of the threaded connector 6 away from the reinforcing wire 4. A protrusion 8 is provided on the top of the appliance body 1. A rotating part 9 is provided on the side of the protrusion 8 away from the appliance body 1.
[0022] Specifically, the inner wall of the alveolar 2 is provided with anti-slip grooves 11 distributed at equal intervals, and the cross-sectional shape of the anti-slip grooves 11 is "︵" shaped. The advantage is that by setting the "︵" shaped anti-slip grooves 11 on the inner wall of the alveolar 2, the contact friction between the orthodontic appliance body 1 and the surface of the tooth 10 is enhanced, effectively preventing the orthodontic appliance body 1 from falling off due to oral activity during wearing, further ensuring the stability of the orthodontic process, and reducing the inconvenience of patients frequently adjusting the orthodontic appliance.
[0023] Specifically, the adhesive layer 5 is a light-cured resin adhesive. The advantage is that by using a light-cured resin adhesive for the adhesive layer 5, the adhesive can cure quickly, facilitating the rapid fixation of the fixing sleeve 3 to the orthodontic body 1. Furthermore, its high adhesive strength ensures stable fixation of the fixing sleeve 3 during orthodontic treatment, preventing displacement of the reinforcing wire 4 and ensuring accurate transmission of orthodontic force.
[0024] Specifically, there are two identical sets of threaded caps 7, and both sets of threaded caps 7 are threadedly connected to both sets of threaded connectors 6. The advantage is that by using two sets of threaded caps 7 threadedly connected to both ends of the reinforcing wire 4, it is easy to ensure that the reinforcing wire 4 is evenly stressed in the orthodontic appliance, avoiding the reinforcing wire 4 from shifting or loosening due to unilateral stress, and ensuring that the reinforcing wire 4 continues to play a supporting and auxiliary corrective role for the orthodontic appliance body 1. Example 2
[0025] like Figure 2-5 As shown, as an improvement on the previous embodiment, the comfort of the patient wearing the orthodontic appliance body 1 is further enhanced. Specifically, the cross-section of the protrusion 8 is semi-circular, and the cross-section of the retractable part 9 is arc-shaped. The advantage is that by setting the cross-section of the protrusion 8 to be semi-circular, the edge of the orthodontic appliance body 1 reduces irritation to the oral mucosa when the patient wears it, improving wearing comfort. Furthermore, the arc-shaped cross-section of the retractable part 9 allows the orthodontic appliance body 1 to be moved away from the tooth root, reducing the probability of complications such as oral ulcers.
[0026] Specifically, both the protrusion 8 and the revolute 9 are made of elastic material. The advantage is that by using elastic material for both the protrusion 8 and the revolute 9, the reaction force generated when the teeth 10 move can be buffered, reducing patient discomfort during orthodontic treatment and lowering the risk of damage to the appliance due to excessive force, thereby extending the appliance's lifespan and improving patient comfort.
[0027] Working principle: In use, the reinforcing wire 4 is first passed through the fixing sleeve 3 and distributed in a ring on the inner surface of the appliance body 1. Then, two sets of threaded caps 7 are threaded to both ends of the reinforcing wire 4, which facilitates the even distribution of force on the reinforcing wire 4 in the appliance and avoids the reinforcing wire 4 shifting or loosening due to unilateral force. This ensures that the reinforcing wire 4 continuously provides support and assists in the orthodontic treatment of the appliance body 1. Subsequently, when the patient wears the appliance body 1, the "︵"-shaped anti-slip groove 11 set in the inner wall of the alveolar 2 enhances the contact friction between the appliance body 1 and the tooth surface 10, effectively preventing the appliance body 1 from falling off due to oral movements during wearing, further ensuring the stability of the orthodontic process, and reducing the frequency of adjustments by the patient. The inconvenience of traditional orthodontic appliances is mitigated by incorporating a semi-circular protrusion 8 at the top of the appliance body 1. This reduces the irritation of the edge of the appliance body 1 to the oral mucosa, decreasing bleeding at the tooth root caused by wearing the appliance body 1. Subsequently, the arc-shaped rotating part 9 keeps the top of the appliance body 1 away from the tooth root, thereby reducing damage to the patient's oral cavity and improving patient comfort. Furthermore, by using elastic materials for both the protrusion 8 and the rotating part 9, the reaction force generated when the teeth 10 move can be buffered, reducing patient discomfort during treatment and lowering the risk of damage to the appliance due to excessive force, thus extending the appliance's lifespan and further improving patient comfort.
[0028] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.
Claims
1. A clear aligner for maxillary protrusion, comprising an aligner body (1) and teeth (10), characterized in that: The orthodontic appliance body (1) has an alveolar groove (2) on its inner side. A fixing sleeve (3) is fixedly installed on the inner surface of the orthodontic appliance body (1). A reinforcing wire (4) is slidably installed on the inner side of the fixing sleeve (3). An adhesive layer (5) is applied to one end of the fixing sleeve (3) near the orthodontic appliance body (1). Threaded connectors (6) are fixedly installed at both ends of the reinforcing wire (4). A threaded cap (7) is provided on the side of the threaded connector (6) away from the reinforcing wire (4). A protrusion (8) is provided on the top of the orthodontic appliance body (1). A rotating part (9) is provided on the side of the protrusion (8) away from the orthodontic appliance body (1).
2. The invisible orthodontic appliance for maxillary protrusion according to claim 1, characterized in that: The inner wall of the tooth socket (2) is provided with anti-slip grooves (11) that are evenly distributed, and the cross-sectional shape of the anti-slip grooves (11) is a "︵" shaped structure.
3. The invisible orthodontic appliance for maxillary protrusion according to claim 1, characterized in that: The adhesive layer (5) is a light-cured resin adhesive.
4. The invisible orthodontic appliance for maxillary protrusion according to claim 1, characterized in that: The threaded cap (7) is provided in two identical sets, and both sets of threaded caps (7) and two sets of threaded connectors (6) are threaded connections.
5. The invisible orthodontic appliance for maxillary protrusion according to claim 1, characterized in that: The cross-section of the protrusion (8) is a "semi-circular" structure, and the cross-section of the swirling part (9) is an "arc" structure.
6. The invisible orthodontic appliance for maxillary protrusion according to claim 1, characterized in that: Both the protrusion (8) and the swivel (9) are made of elastic material.