Angle Class III functional appliance suitable for high-angle patients and manufacturing method

Abstract

The present invention belongs to the field of oral orthodontics, and specifically relates to providing an Angle Class III functional orthodontic appliance suitable for patients with high angles, comprising: a cast band, respectively provided on the upper and lower posterior teeth; a maxillary TPA transverse palatal rod, the two ends of which are fixedly connected to the cast band in the maxillary position; an anterior teeth elastic support assembly, provided on the posterior side of the maxillary anterior teeth, fixedly connected to the cast band via a bracket, and used to support the cast band between the molars; a mandibular labial arch, provided on the labial surface of the mandibular anterior teeth, the two ends of which are connected to the cast band in the mandibular position, so that the mandible is maintained in a retracted position; a traction hook, one end of which is fixedly connected to the cast band and the other end is free, and is used to restrict the growth and development of the mandible and promote the growth and development of the maxillary bone. The purpose is to make the orthodontic appliance suitable for patients with low angles, average angles, and high angles, and to be used in conjunction with anterior traction to treat skeletal and dental Class III malocclusions from the growth and development period to the early stage of permanent teeth.

Description

Technical Field

[0001] The present invention belongs to the field of oral orthodontics, and in particular relates to an Angle Class III functional appliance suitable for high-angle patients and a method for manufacturing the functional appliance. Background Art

[0002] Angle Class III malocclusion is the most common malocclusion, with an incidence of 12% among adolescents in my country. It refers to the mesiodistal dislocation of the maxillary and mandibular bones and dental arches, with the mandible and mandibular dental arch positioned mesiodistal, and the molars positioned mesiodistal. This can manifest as anterior teeth opposition, crossbite, or open bite, maxillary retrusion, or mandibular protrusion. It has a serious impact on the patient's dentofacial development, oral health, oral function, and facial aesthetics. The deformity often worsens with growth and development, and can also cause varying degrees of psychological and psychiatric impairment. Therefore, early treatment of Angle Class III malocclusion is crucial.

[0003] Functional appliances are a type of orthodontic device that uses muscle function (such as muscle strength and bite force) to adjust the jaw relationship. They are an effective treatment for Angle Class III malocclusion in the early stages of growth and development. After the appliance is worn in the mouth, the components on the appliance use muscle tension and bite force as the source of force, which is transmitted to the teeth and jaws, changing the position of the jaws, stretching the perioral muscles and mucosa, or changing the force balance of the masticatory muscles, so as to adjust the abnormal muscle dynamic balance, block bad lip and tongue habits, change abnormal jaw growth, and use growth potential to guide normal maxillofacial growth in the early stages of growth and development.

[0004] Functional appliances such as Frankle III appliance, muscle activator, anterior traction appliance, occlusal reed appliance and reverse Twin-block appliance can be used for the early correction of Angle Class III malocclusion, but they all have certain application defects. For example, anterior traction appliances may cause molar protrusion and anterior crowding. The commonly used Frankle III appliance has the advantages of good efficacy, low patient compliance requirements, simple wear, easy cleaning, and no impact on root development. However, the Frankle III appliance induces and restricts functional changes in oral soft tissues, promoting posterior tooth elongation and clockwise rotation of the mandible. This leads to posterior tooth elongation and increased mandibular height in patients with high-angle dysmorphia, and a decrease in the aesthetics and coordination of the lower third of the face and profile. Therefore, it should not be used for patients with high-angle dysmorphia. Myoelectric devices are large and, when worn, can affect chewing and pronunciation, sometimes causing pain. Functional appliances such as occlusal reed appliances and reverse twin-block appliances primarily regulate perioral muscle balance and reshape the dental arch and jaw relationship. Their main effect is to promote or inhibit jaw development, but they cannot change the inclination of the anterior teeth. Currently, there is a lack of convenient, feasible, and effective functional appliances suitable for patients with Class III high-angle dysmorphia. Summary of the Invention

[0005] In order to solve the defects of the above-mentioned prior art, the purpose of the present invention is to provide an Angle III functional orthodontic appliance and a manufacturing method that can be used by patients with low angle, average angle and high angle, and can be used in conjunction with anterior traction to treat skeletal and dental Class III malocclusion from the growth and development period to the early stage of permanent teeth.

[0006] The technical solution adopted in the present invention is as follows:

[0007] An Angle Class III functional orthodontic appliance suitable for patients with high angles, comprising:

[0008] Cast bands are placed on the upper and lower posterior teeth;

[0009] The maxillary TPA transverse palatal rod is set between the posterior teeth on both sides of the maxilla. Its two ends are fixedly connected to the cast band ring in the maxilla, supporting the cast band ring between the molars and maintaining the width between the molars.

[0010] The front teeth elastic support component is set on the back side of the maxillary front teeth and is fixedly connected to the casting band ring through the bracket to elastically support the canines from the left to the right side of the front teeth;

[0011] The mandibular labial arch is set on the labial surface of the mandibular anterior teeth, and its two ends are connected to the casting band ring in the mandibular area to maintain the mandible in a retracted position;

[0012] The traction hook has one end fixedly connected to the casting band and the other end is free. During correction, it is combined with the rubber band to apply traction to the casting to limit the growth and development of the mandible and promote the growth and development of the maxilla.

[0013] In the preferred technical solution, the maxillary TPA transverse palatal rod is made of bent stainless steel wire, with both ends fixedly connected to the casting band ring at the maxillary first molar, and the middle part is a U-shaped structure protruding forward.

[0014] In the preferred technical solution, the anterior teeth elastic support component includes an anterior teeth palatal base and a hyperbolic tongue spring. The anterior teeth palatal base is connected to the casting band rings at the first premolars on both sides of the maxillary teeth through a bracket. One end of the hyperbolic tongue spring is embedded in the anterior teeth palatal base, and the other end is fixed to the back side of the maxillary canines and incisors respectively.

[0015] Furthermore, the palatal base of the anterior teeth is made of self-curing resin, and the hyperbolic tongue reed is bent from 0.018-0.020 mm Australian wire or 0.4-0.6 mm ordinary stainless steel wire.

[0016] In the preferred technical solution, the mandibular labial arch is formed by bending 1.0-1.2 mm stainless steel wire, and has an arc shape that matches the shape of the mandibular anterior teeth, and is arranged close to the lower anterior gingival margin.

[0017] Furthermore, the traction hook includes a first traction hook, a second traction hook and a third traction hook arranged at different positions, the first traction hook is respectively arranged on the casting band ring at the first premolars on both sides of the maxillary teeth, the second traction hook is respectively arranged on the casting band ring at the first molars on both sides of the maxillary teeth, and the third traction hook is respectively arranged on the casting band ring at the first premolars on both sides of the mandibular teeth.

[0018] The preferred technical solution also includes an occlusal pad covering the maxillary posterior teeth casting ring, the occlusal pad is made of self-curing resin, and the occlusal pad extends the palatal base to the back of the jaw. The lingual surface of the tooth, and the lingual base and the anti The lingual surfaces of the teeth are in surface contact.

[0019] A method for manufacturing an Angle Class III functional appliance suitable for high-angle patients, comprising:

[0020] Impression: The original dental model of the patient is sampled through the impression tray and impression material, and the working model is poured with superhard plaster to make the Angle Class III malocclusion. Soak the plaster model with water and follow the wax of the upper and lower jaws. Align the recorded relationships, mix the plaster, and fix the model in a simple on the shelf;

[0021] Model finishing: remove the small nodules on the working surface of the plaster model, fill the small holes or concave areas that need to be buffered with wax, and trim the bottom surface of the model to the same level as the base. The model is trimmed into a saddle shape along the dental arch, and the plaster abutment teeth where the retainers are to be placed are trimmed. The position and range of the steel wire and the base are drawn on the model, a separating agent is applied, the undercut is filled, the cushioning is performed, and a refractory model is made.

[0022] Casting band production: wax is hot according to the design line to form the outer crown shape. The wax pattern should be consistent with the buccal and lingual shapes. The mesial and distal free ends should be connected to the lingual wax pattern. The flared spaces are connected with wax, and continuous metal casting bands are wrapped around the upper and lower posterior teeth respectively. The bilateral casting bands are connected through the mandibular labial arch. After the wax pattern is completed, it is removed and the wax pattern is checked for integrity. Conventional investment casting is performed. After the casting is completed, the sprue is cut by sandblasting, trimmed and inserted into the model, the appearance is trimmed, and polished.

[0023] Maxillary TPA transverse palatal bar bending: It is made of 1.2-1.5mm stainless steel wire, about 2mm away from the palatal vault mucosa, with the middle part U-shaped and convex forward and mesial, and the two ends are welded to the palatal side of the molar band ring;

[0024] Maxillary and mandibular traction hooks are bent and welded: The maxillary traction hook that bends distally from the distal canine is made of 1.2-1.5mm stainless steel wire, and the end is welded to the distal buccal side of the metal cast canine with a ring and bends distally. The traction hook that bends distally from the maxillary first molar and the traction hook that bends mesially from the distal canine are made of 1.2-1.5mm stainless steel wire, and the end of the maxillary traction hook is welded to the buccal side of the metal cast first molar with a ring and bends distally, and the end of the mandibular traction hook is welded to the distal buccal side of the metal cast canine with a ring and bends mesially.

[0025] Mandibular labial arch fabrication and welding: Made from 1.0-1.2mm stainless steel wire, it is placed on the labial surface of the lower anterior teeth, extending from the bilateral molar casting bands and then forming a U-shaped curve, as close to the lower anterior gingival margin as possible to prevent the lower incisors from tilting lingually.

[0026] Hyperbolic tongue spring bending and palatal base fabrication for anterior teeth: Six hyperbolic tongue springs are bent from the left to the right canine using 0.018mm Australian wire or 0.5mm ordinary stainless steel wire. The number of reeds can be increased or decreased based on actual conditions. A self-curing resin base is made in the hard palate area on the palatal side of the anterior teeth to embed the distal end of the hyperbolic tongue spring. This is then connected to the cast bands on both sides of the posterior teeth via a bracket made of bent stainless steel wire.

[0027] Production of maxillary posterior occlusal pad: Use self-curing resin to make maxillary pads to cover and wrap the maxillary posterior teeth casting bands, with a thickness of 1-3mm, thicker in the front and thinner in the back, so as to open the occlusion of the anterior teeth. The contact surface of the occlusal surface forms a smooth plane. After the self-curing resin solidifies, remove the orthodontic appliance and grind and polish it.

[0028] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are:

[0029] 1) The scope of indications is expanded, and it can be used for high-angle patients who are not suitable for Class III traction: The present invention uses the maxillary TPA transverse palatal rod to connect the molar band rings on both sides, which strengthens the posterior tooth support; prevents the elongation of the upper and lower posterior teeth, and has better vertical control for high-angle patients, so that the three-dimensional structure of the skull, occlusion, jaw, and face grows toward the normal type; at the same time, it can maintain the width between molars and prevent the arch width from changing during Class III traction. It reduces the crown-palatal tilting of the upper molars caused by the uncontrolled torque of the upper molars, the mesial tilting of the upper molars, and the elevation of the upper molars caused by Class III traction. It prevents the anterior and inferior clockwise rotation of the mandible caused by the elongation of the patient's posterior teeth, has better control over the face height, and is conducive to opening treatment.

[0030] 2) The scope of indications has been expanded, and patients in the early permanent dentition and replacement dentition stages can wear it: Children with Angle Class III malocclusion generally have the best correction age of 3-5 years in the deciduous dentition stage. At this time, the roots of the deciduous teeth have completed development and the bones are elastic. Currently, the functional orthodontic appliances commonly used in clinical practice are mostly suitable for patients in the deciduous dentition and replacement dentition stages. For example, the best age for maxillary anterior traction correction is generally 4-8 years old, and the clinically common Frankle III orthodontic appliance is mainly applicable to patients in the permanent dentition stage. It provides more treatment options for orthodontic patients in the permanent dentition stage.

[0031] 3) Fixed appliances use glass ionomer bonding, which requires lower patient compliance and reduces the risk of poor results due to children's non-cooperation in removing the appliances, thereby improving treatment efficiency. At the same time, fixed appliances have good retention, sufficient support, are small in size and more comfortable to wear, do not affect the patient's pronunciation and oral training, have long follow-up intervals, and do not affect the patient's life.

[0032] 4) Maxillary protraction, mandibular growth and development guidance, and maxillary anterior teeth alignment can be performed simultaneously. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] The present invention will now be described by way of example with reference to the accompanying drawings, in which:

[0034] Figure 1 Schematic diagram of the structure of the maxillary part of the Angle Class III functional appliance of the present invention;

[0035] Figure 2 Schematic diagram of the structure of the mandibular part of the Angle Class III functional appliance of the present invention;

[0036] Figure 3 This is a front view of the overall structure of the Angle Class III functional appliance of the present invention;

[0037] Figure 4 This is a side view of the overall structure of the Angle Class III functional appliance of the present invention;

[0038] Figure 5 It is a flow chart of the method for manufacturing Angle Class III functional orthodontic appliance in the present invention.

[0039] Reference numerals:

[0040] Casting band-1; maxillary TPA transverse palatal bar-2; bracket-3; mandibular labial arch-4; first traction hook-5; second traction hook-6; third traction hook-7; first premolar-8; casting band-1; hyperbolic tongue spring-15; canine-9; incisor-10; mandibular anterior teeth-11; first molar-12; occlusal splint-13; anterior palatal base-14; hyperbolic tongue spring-15. DETAILED DESCRIPTION

[0041] In order to make the purpose, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all of the embodiments. The components of the embodiments of the present application generally described and shown in the drawings here can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the application for protection, but merely represents the selected embodiments of the present application. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without making creative work are within the scope of protection of this application.

[0042] In the description of the embodiments of the present application, it should be noted that the terms "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings, or are the orientation or positional relationship in which the product of the invention is usually placed when in use. They are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation. Therefore, they cannot be understood as limiting the present application. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0043] The following combination Figures 1 to 5 The present invention is described in detail.

[0044] Example 1

[0045] In one aspect, the present invention provides an Angle Class III functional appliance suitable for high-angle patients, comprising:

[0046] A casting band 1, wherein the casting band 1 comprises a continuous casting band 1 for the bilateral posterior teeth of the maxillary teeth and a continuous casting band 1 for the bilateral posterior teeth of the mandibular teeth, which are respectively arranged on the bilateral posterior teeth of the maxillary teeth and the mandibular teeth, respectively; specifically, the continuous metal casting band 1 respectively wraps the bilateral posterior teeth of the maxillary teeth, from the first premolar 8 to the first molar 12, or from the bilateral first deciduous molar to the first molar 12, and the specific tooth names may change due to different tooth replacement periods, and the bilateral casting band 1 is connected through the maxillary TPA transverse palatal rod 2 and the anterior tooth palatal base 14; similarly, the continuous metal casting band 1 respectively wraps the bilateral posterior teeth of the mandibular teeth, from the mandibular first premolar 8 to the first molar 12, or from the bilateral mandibular first deciduous molar to the first molar 12, and the specific tooth names may change due to different tooth replacement periods, and the bilateral casting band 1 is connected through the mandibular labial arch 4. By connecting the entire posterior teeth through the casting band 1, the posterior teeth anchorage is enhanced, the overall parallel movement of the teeth is promoted, the torsion, lingual tilt, buccal tilt, mesiodistal movement of individual teeth are prevented, and the bone remodeling during the correction effect is promoted.

[0047] The maxillary TPA transverse palatal bar 2 is made of 1.2-1.5mm stainless steel wire, bent approximately 2mm from the palatal vault mucosa. The middle portion is U-shaped and convex, facing mesially forward. The two ends are welded to the palatal side of the molar band. By connecting the two molar bands, it mainly serves to strengthen the posterior anchorage and prevent the elongation of the upper and lower posterior teeth. For patients with high angles, it provides better vertical control, allowing the three-dimensional structure of the skull, occlusion, jaw, and face to grow normally. At the same time, it maintains the intermolar width and prevents changes in the dental arch width during Class III distraction.

[0048] Occlusal pad 13: The occlusal pad extends the palatal base to the back The lingual surface of the tooth, and the lingual base and the anti The lingual surfaces of the teeth are in surface contact and are made of self-curing resin. They cover and wrap the maxillary posterior teeth with cast bands 1, with a thickness of 1-3 mm, suitable for opening the anterior teeth occlusion. The contact surface of the occlusal surface forms a smooth plane, which is conducive to the relative movement between the upper and lower jaws.

[0049] The anterior teeth elastic support component is arranged on the posterior side of the maxillary anterior teeth and is fixedly connected to the casting band 1 through the bracket 3 to elastically support the canines 9 from the left to the right side of the anterior teeth; specifically, the anterior teeth elastic support component includes an anterior teeth palatal base 14 and a hyperbolic tongue spring 15, and the anterior teeth palatal base 14 is respectively connected to the casting band 1 at the first premolars 8 on both sides of the maxillary teeth through the bracket 3, one end of the hyperbolic tongue spring 15 is embedded in the anterior teeth palatal base 14, and the other end is respectively fixed on the posterior side of the maxillary canine 9 and the incisor 10, the hyperbolic tongue spring 15 can cooperate with Class III traction to quickly correct the anterior teeth crossbite, correct the anterior teeth torque, push the maxillary anterior teeth 3-3 to the buccal side, and relieve the crossbite; at the same time, it can have a certain effect of aligning the anterior teeth.

[0050] The mandibular labial arch 4 is made of 1.0-1.2mm stainless steel wire and has an arc shape that matches the shape of the mandibular anterior teeth 11. It is set close to the lower anterior gum margin and its two ends are connected to the casting band 1 on the mandibular part to maintain the mandible in a retracted position.

[0051] The traction hook is fixedly connected to the casting band 1 at one end and free at the other end. It is combined with the rubber band during correction to apply traction to the casting, which is used to limit the growth and development of the mandible and promote the growth and development of the maxilla. Specifically, the traction hook includes a first traction hook 5, a second traction hook 6 and a third traction hook 7 arranged at different positions. The first traction hook 5 is respectively arranged on the casting band 1 at the first premolars 8 on both sides of the maxilla, bent toward the distal end, and cooperated with the front traction of the face bow to treat skeletal Class III maxillary underdevelopment, traction the maxilla to grow forward, and limit the downward rotation of the mandible to prevent the lower height from increasing; the second traction hook 6 is respectively arranged on the casting band 1 at the first molars 12 on both sides of the maxilla, and the third traction hook 7 is respectively arranged on the casting band 1 at the first premolars 8 on both sides of the mandible. The end of the second traction hook 6 is welded to the buccal side of the first molar 12 of the metal casting band 1 and bent toward the distal end. The end of the third traction hook 7 is welded to the distal buccal side of the first premolar 8 of the metal casting band 1 and bent toward the mesial end. Used to cooperate with intraoral Class III traction to limit the growth and development of the mandible, promote the growth and development of the maxilla, and improve the patient's skeletal and dental Class III relationship.

[0052] In this embodiment, the maxillary TPA transverse palatal rod 2 is made of bent stainless steel wire, with both ends fixedly connected to the casting band ring 1 at the maxillary first molar 12, and the middle part is a U-shaped structure protruding forward.

[0053] In this embodiment, the anterior teeth elastic support component includes an anterior teeth palatal base 14 and a hyperbolic tongue spring 15. The anterior teeth palatal base 14 is connected to the casting band 1 at the first premolars 8 on both sides of the maxillary teeth through a bracket 3. One end of the hyperbolic tongue spring 15 is embedded in the anterior teeth palatal base 14, and the other end is fixed to the back side of the maxillary canine 9 and the incisor 10 respectively.

[0054] In this embodiment, the anterior tooth palatal base 14 is made of self-curing resin, and the hyperbolic tongue spring 15 is made of 0.018-0.020 mm Australian wire or 0.4-0.6 mm ordinary stainless steel wire.

[0055] In this embodiment, the traction hook is made of 1.2-1.5 mm stainless steel wire, and the end is welded to the distal buccal side of the metal casting ring-shaped canine 9.

[0056] Example 2

[0057] Another aspect of the present invention provides a method for manufacturing an Angle Class III functional appliance suitable for high-angle patients, specifically comprising:

[0058] Impression taking: The model must be clear and accurate, with the impression depth encompassing the entire alveolar ridge and maxillary tuberosity, reaching deep into the vestibular groove. The impression tray should be appropriately extended, with the edge of the tray 2-3 mm away from the teeth and alveolar ridge. When taking the impression, gently pull on the patient's lips and perioral muscles to press the impression material into the vestibular groove. Use superhard plaster to cast the working model. During reconstruction, the mandible is required to be in the most comfortable retracted position. Generally, the mandible should be retracted until the condyle is in the most posterior position in the glenoid fossa. The degree of the lock is determined by the degree of the lock. Generally, the interocclusal space between the upper and lower molars is 1 to 2 mm and can be placed. It is appropriate to support. Soak the plaster model with water and follow the wax of the upper and lower jaws. Align the recorded relationships, mix the plaster, and fix the model in a simple On the shelf.

[0059] Model finishing: remove the small nodules on the working surface of the plaster model, fill the small holes or concave areas that need to be buffered with wax when necessary, and trim the bottom surface of the model to the same level as the base. Using a parallel plane, trim the model into a saddle shape along the dental arch. After trimming, keep the bottom of the model at least 10 mm from the gingival margin of the prepared tissue. Then, trim the plaster abutments where the retainers will be placed. Draw the positions and ranges of the wires and bases on the model, and apply a release agent. Fill the undercuts, provide a cushion, and then create a refractory model.

[0060] Casting band 1 production: wax is hot according to the design line to form the outer crown shape. The wax pattern should be consistent with the buccal and lingual shape, with a thickness of 0.3mm. The mesial and distal free ends should be connected to the lingual wax pattern. The flared spaces are connected with wax. A continuous metal casting band (1) is applied to the maxillary posterior teeth, from the first premolar (8) to the first molar (12), or from the first deciduous molar (12) to the first molar (12) bilaterally. The bands are connected via the maxillary transpalatal bar (2) and the anterior palatal base (14). Similarly, a continuous metal casting band (1) is applied to the mandibular posterior teeth, from the first premolar (8) to the first molar (12), or from the first deciduous molar (12) to the first molar (12) bilaterally. The bands are connected via the mandibular labial arch (4). After the wax-up is completed, it is removed and inspected for integrity. Conventional investment casting is performed. After the casting is completed, the sprue is cut and sandblasted, trimmed, and then inserted into the model. The exterior morphology is then refined and polished.

[0061] Maxillary TPA transverse palatal bar 2 bends: It is made of 1.2-1.5mm stainless steel wire, about 2mm away from the palatal vault mucosa, with the middle U-shaped curve convex forward and mesial, and the two ends are welded to the palatal side of the molar band ring.

[0062] Maxillary and mandibular traction hooks are bent and welded: The maxillary traction hook extending distally from canine 9 is made of 1.2-1.5mm stainless steel wire, with the end welded to the buccal distal side of the metal-cast canine 9 and bent distally. The distal traction hook extending distally from the maxillary first molar 12 and the mesial traction hook extending distally from the mandibular canine 9 are made of 1.2-1.5mm stainless steel wire, with the end welded to the buccal distal side of the metal-cast canine 9 and bent distally. The end welded to the buccal distal side of the metal-cast canine 9 and bent mesially.

[0063] Mandibular labial arch 4 is made and welded: It is made of 1.0-1.2mm stainless steel wire and placed on the labial surface of the lower front teeth. It extends from the bilateral molar casting band 1 and then makes a U-shaped curve, as close to the lower front gingival margin as possible to prevent the lower incisor 10 from tilting to the lingual side.

[0064] Bending of the hyperbolic tongue spring 15 and fabrication of the palatal base 14 of the anterior teeth: Use 0.018mm Australian wire or 0.5mm ordinary stainless steel wire to bend the six hyperbolic tongue springs 15 from the left to the right canine 9 of the anterior teeth. The number of reeds can be increased or decreased according to the actual situation. Make a self-curing resin base in the hard palate area of ​​the anterior teeth to embed the distal end of the hyperbolic tongue spring 15. Connect it to the cast band 1 of the posterior teeth on both sides through a bracket 3 made of bent stainless steel wire.

[0065] Production of maxillary posterior occlusal pad 13: Use self-curing resin to make maxillary maxillary pads to cover and wrap the maxillary posterior teeth casting band ring 1, with a thickness of 1-3mm, thicker in the front and thinner in the back, so as to open the front teeth occlusion. The occlusal contact surface forms a smooth plane. After the self-curing resin solidifies, remove the orthodontic appliance and grind and polish it.

[0066] The manufacturing method of the functional appliance provided by the present invention has also made improvements compared with the prior art:

[0067] The traction hook is bent and then welded: the traditional cast traction hook is very rigid, with a fixed shape, angle and height, and cannot be adjusted after casting; this invention uses a bent traction hook and then welded, which can be avoided and adjusted according to the patient's soft and hard tissue conditions such as the vestibule groove height and the lip and cheek frenulum position.

[0068] The hyperbolic reed is made of Australian wire: Australian wire has the following advantages over traditional stainless steel wire. It can be fine-tuned and curved, and can also play a corresponding elastic role. It has good control over tooth movement and can effectively adjust the torque of individual teeth, with a wider adjustable range.

[0069] Use cast bands: Cast bands combine the casting technology of the restoration process with the standard band manufacturing method, effectively improving the band's retention. This manufacturing method is more suitable for deciduous teeth in the mixed dentition. It can not only overcome the undercut of the abutment teeth, but also easily realize the production of continuous bands for multiple abutment teeth.

[0070] Use of an improved occlusal pad: Traditional braces apply force by opening a hyperbolic tongue spring, making it difficult to control the force. Furthermore, as the tongue spring deforms, the direction and position of the force also change. During the force application process, the tongue spring is prone to deformation, which can lead to breakage and accidental ingestion. This invention uses an improved occlusal pad, where the lingual surface of the crossbite is in surface contact with the lingual base. This allows for sustained and stable force application, prevents deformation of the base, and minimizes the risk of breakage.

[0071] Example 3

[0072] Another aspect of the present invention further provides a method for using the functional appliance:

[0073] (1) Wearing of braces:

[0074] Oral examination: Check the tooth arrangement and occlusion, and check for caries, tartar, etc.

[0075] Tooth surface cleaning: remove soft plaque and food debris on the tooth surface;

[0076] Moisture isolation: Use a three-purpose gun to gently blow on the tooth surface and use a cotton roll to isolate moisture;

[0077] Wearing the braces: Glass ionomer bonds the upper and lower braces separately. Generally, it is chosen to wear the braces from the posterior teeth first. Use both hands to place the braces flat in the mouth. After the braces are aligned with the corresponding teeth, wear them slowly. Use the thumb (upper jaw) or index finger (mandibular) to push the incisal end and occlusal surface of the braces until the braces are fully in place. When the posterior teeth are obviously misaligned, you can choose to wear the braces from the posterior teeth on the side with obvious misalignment first, and then gradually put the braces in place from back to front. Use the thumb and index finger on the posterior teeth on the other side to push and pull the braces into place completely. After the upper and lower braces are in place, bite the upper and lower jaws tightly so that the braces are fully in place and fit the tooth surface fully. The patient can also bite a medical cotton roll to assist in the retention of the braces. After using a mouth mirror to check that the braces are fully in place in the buccal and lingual directions and in the occlusal directions, ask the patient to bite the cotton roll for 10 minutes and wait for the glass ionomer adhesive to cure.

[0078] (2) Class III traction:

[0079] Use a rubber band to connect the traction hook of the maxillary posterior teeth to the traction hook of the ipsilateral mandibular anterior teeth. The traction force applied by the rubber band is approximately 100g. The rubber band should be worn for at least 22 hours daily, and two rubber bands should be replaced daily, symmetrically on both sides. To prevent or minimize side effects such as mesial tilting and elevation of the upper molars, early Class III traction should be performed over a short distance. That is, the rubber band is placed not directly on the maxillary molars, but on the maxillary premolars. The traction force should be light, approximately 50-60g per side.

[0080] Suitable for Angle Class III malocclusion correction, it is primarily used to lip-extend the upper anterior teeth, retract the lower anterior teeth, and move the lower dentition backward, pulling the mandible backward and promoting the forward growth of the maxilla to assist in correcting anterior crossbite and mesial occlusion of the posterior teeth. It also relieves anterior crossbite, assists in retracting the lower anterior teeth, and prevents lip tilt of the lower anterior teeth.

[0081] (3) Face bow traction:

[0082] The intraoral device utilizes the orthodontic device described in this patented invention, eliminating the need for additional devices. One side of the rubber band is attached to the traction hook on the maxillary anterior teeth, while the other side is connected to a commercially available facebow anterior traction device. The traction force is typically applied downward at a 30-degree angle to the occlusal plane, with a force of 250-500g per side. The device should be worn for at least 12 hours daily. Two rubber bands should be replaced daily, symmetrically between the left and right sides.

[0083] The face bow anterior traction device is suitable for patients with maxillary hypoplasia, skeletal Class III, and those in the growth and development stage. It can also be used when maxillary molars need to be advanced but anterior teeth support is insufficient. Unlike traditional anterior traction devices, this invention is suitable for patients with high-angle long faces. It is generally not suitable for patients with anterior crossbite who have a normal maxillary development and anterior mandibular overgrowth.

[0084] It can be combined with a commercially available face bow to pull the maxilla forward, promoting maxillary growth and correcting skeletal malocclusion caused by maxillary and mandibular dislocation. It stimulates maxillary bone deposition and growth, leading to anterior maxillary displacement with a slight counterclockwise rotation, redirecting mandibular growth. The effects of anterior maxillary traction during growth and development have been extensively researched and recognized by clinical experts.

[0085] When pulling downward at an angle of -37° from the canine, the two will move horizontally along the pulling line. Studies have shown that the orthopedic force can be maximized at this angle. The anterior pulling force value varies with age: deciduous dentition: 300-400g / side; mixed dentition: 400-600g / side; early permanent dentition: 600-800g / side; young adults: 800-1000g / side, or even more than 1000g.

[0086] (4) End of treatment:

[0087] Use band-ring removal pliers to remove the band. Use your thumb or index finger to grasp the palatal edge of the posterior teeth of the contralateral appliance and gently pull downward, alternating between the two sides. Slowly dislocate the appliance from back to front, and remove the maxillary appliance. Use your thumb to push up the buccal edge of the posterior teeth of the appliance. Alternating between the two sides, slowly dislocate the appliance from back to front, and remove the mandibular appliance. If dislocation is difficult, you can also try grasping the lingual edge of the posterior teeth of the ipsilateral appliance with your index finger and pulling it upward and outward, alternating between the two sides. Follow up at 1, 3, 6, and 12 months after completion, and annually thereafter. Perform Phase II treatment if necessary.

[0088] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the invention can be embodied in other specific forms without departing from the spirit or essential characteristics of the invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the invention is defined by the appended claims, not the foregoing description, and it is intended that all variations within the meaning and scope of the appended claims be encompassed. Any reference sign in a claim should not be construed as limiting the claim to which it relates.

[0089] As described above, the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that the technical solutions described in the above embodiments can still be modified, or some of the technical features thereof can be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. An Angle Class III functional appliance suitable for high-angle patients, characterized in that: include: Casting bands (1) are respectively provided on the upper and lower jaw posterior teeth; The maxillary TPA transverse palatal rod (2) is arranged between the posterior teeth on both sides of the maxilla, and its two ends are fixedly connected to the cast band ring (1) in the maxillary part, supporting the cast band ring (1) between the molars and maintaining the width between the molars; Anterior teeth elastic support assembly, arranged at the rear side of the maxillary anterior teeth, fixedly connected to the casting band ring (1) via a bracket (3), elastically supporting the canines (9) from the left side to the right side of the anterior teeth; The mandibular labial arch (4) is provided on the labial surface of the mandibular anterior teeth (11), and the two ends are connected to the casting band (1) at the mandibular part to maintain the mandibular in a retracted position; A traction hook, one end of which is fixedly connected to the casting band (1) and the other end of which is free and is combined with a rubber band during correction to apply traction to the casting to restrict the growth and development of the mandible and promote the growth and development of the maxillary bone; The maxillary TPA transverse palatal rod (2) is made of bent stainless steel wire, with both ends fixedly connected to the casting band ring (1) at the maxillary first molar (12), and the middle part is a U-shaped structure protruding forward; The anterior teeth elastic support assembly comprises an anterior teeth palatal base (14) and a hyperbolic tongue spring (15), wherein the anterior teeth palatal base (14) is connected to the casting band ring (1) at the first premolars (8) on both sides of the maxillary teeth through a bracket (3), one end of the hyperbolic tongue spring (15) is embedded in the anterior teeth palatal base (14), and the other end is fixed to the back side of the maxillary canine (9) and the incisor (10); The traction hook comprises a first traction hook (5), a second traction hook (6) and a third traction hook (7) arranged at different positions, wherein the first traction hook (5) is respectively arranged on the casting band ring (1) at the first premolars (8) on both sides of the maxilla, the second traction hook (6) is respectively arranged on the casting band ring (1) at the first molars (12) on both sides of the maxilla, and the third traction hook (7) is respectively arranged on the casting band ring (1) at the first premolars (8) on both sides of the mandible; It also includes an occlusal pad (13) covering and wrapping the maxillary posterior teeth casting band ring (1), and the occlusal pad (13) is made of self-curing resin.

2. The Angle Class III functional appliance suitable for high-angle patients according to claim 1, characterized in that: The anterior tooth palatal base (14) is made of self-curing resin material, and the hyperbolic tongue reed (15) is made of 0.018-0.020 mm Australian wire or 0.4-0.6 mm stainless steel wire.

3. The Angle Class III functional appliance suitable for high-angle patients according to claim 1, characterized in that: The mandibular labial arch (4) is formed by bending a 1.0-1.2 mm stainless steel wire, and has an arc shape that matches the shape of the mandibular anterior teeth (11), and is arranged close to the lower anterior gum margin.

4. A method for manufacturing an Angle Class III functional orthodontic appliance suitable for high-angle patients according to any one of claims 1 to 3, characterized in that: The steps are: taking the mold, trimming the model, making the casting ring (1), bending the maxillary TPA transverse palatal rod (2), bending and welding the maxillary and mandibular traction hooks, making and welding the mandibular labial arch (4), bending the hyperbolic tongue spring (15) and making the anterior tooth palatal base (14), and making the maxillary posterior occlusal pad (13).

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