Automatic teenager bow expanding device with adjusting track

Abstract

A teenager automatic arch expanding device with an adjusting track comprises a belt ring fixed to any tooth from number 4 teeth to number 8 teeth of the upper jaw, and the belt ring is arranged at the lingual side position of the selected tooth in a welding or other fixing mode; the two metal rods are connected to the belt ring, the metal rods extend from the tongue side of the belt ring to the upper jaw direction, a rail cavity used for guiding the metal rods to move is formed in the movable rail, one end of each metal rod is inserted into the rail cavity and extends along the movable rail, and the positions of the metal rods are adjusted and fixed through the adjusting assembly; the spring is arranged in the movable track, the spring is arranged in the length direction of the movable track and connected with the metal rod inserted into the track cavity, and the metal rod is driven to move in the movable track through the elastic effect of the spring; and the stop valve is arranged on the movable track. The problems that an existing expansion device is tedious in manual adjustment, poor in fixing stability, poor in tooth comfort of teenagers and the like are effectively solved.

Description

Technical Field

[0001] The invention belongs to the field of medical devices, and in particular relates to an automatic arch expansion device for teenagers with an adjustment track. Background Art

[0002] In the field of orthodontics, common dental problems among teenagers, including crowded dentition and tilted front teeth, often need to be corrected through arch expansion and correction devices. At present, the commonly used arch expansion devices are mostly manually adjustable arch expanders, which mainly apply mechanical force through devices such as screws, arch wires and metal rods to gradually expand the width of the dental arch. However, there are some limitations in the application of such devices. First, the adjustment of traditional arch expanders usually relies on manual operation by orthodontists, and patients need regular follow-up visits after wearing them, which is time-consuming and labor-intensive, and increases the cost of use. Secondly, since these devices need to be adjusted frequently, they may cause increased discomfort to patients during wearing, especially for teenagers, and the discomfort of wearing for a long time will affect their daily life. In addition, traditional arch expanders mostly use a relatively rigid metal rod and arch wire connection method, which lacks the flexibility to adapt to the physiological structure of the oral cavity, causing patients to easily experience gum compression or discomfort when wearing them.

[0003] In addition, most current devices lack structural support for fine-tuning, such as the inability to achieve arch expansion automatically or gradually, which leads to low correction efficiency. Elastic adjustment in traditional devices mostly relies on the tension of the arch wire, but the elastic control method is single and lacks a refined adjustment mechanism, making it difficult to adapt to individual differences in patients. The connection between the metal rod and the band ring is usually fixed, and the angle and position cannot be freely adjusted, which also limits the flexibility of the device in actual wearing.

[0004] In response to the above problems, the present invention provides an automatic arch expansion device for teenagers with an adjustable track. By combining a metal rod with a movable track and coordinating a structure with an adjustable spring and a stop valve, automatic and flexible adjustment of arch expansion and anterior teeth correction can be achieved, thereby avoiding frequent follow-up visits and effectively improving wearing comfort and correction efficiency. Summary of the invention

[0005] In view of the deficiencies of the prior art, the present invention provides an automatic arch expansion device for teenagers with an adjustment track, which effectively solves the problems of the existing arch expansion device, such as cumbersome manual adjustment, poor fixing stability, and poor comfort for teenagers' teeth.

[0006] In order to solve the above problems, the technical solution adopted by the present invention is: An automatic bow expansion device for teenagers with an adjustment track, comprising: A band fixed to any of the maxillary teeth No. 4 to No. 8, wherein the band is set at the lingual side of the selected tooth by welding or other fixing methods; Two metal rods connected to the band ring, the metal rods extending from the lingual side of the band ring toward the palate and arranged in an arc-shaped structure conforming to the surface of the palate; An adjustment component with a movable track, the adjustment component is arranged in contact with the upper jaw surface, the movable track is provided with a track cavity for guiding the movement of the metal rod, one end of the metal rod is inserted into the track cavity and extends along the movable track, and the position of the metal rod is adjusted and fixed by the adjustment component; A spring is arranged in the movable track, the spring is arranged along the length direction of the movable track and is connected to a metal rod inserted into the track cavity, and the metal rod is driven to move in the movable track through the elastic action of the spring; A stop valve is arranged on the movable track, and the stop valve is used to control the elastic release state of the spring. When the stop valve is opened, the spring drives the metal rod to move along the movable track; when the stop valve is closed, the position of the metal rod is locked to prevent it from moving in the movable track.

[0007] Preferably, the metal rod is an arc-shaped rod, one end of which is fixedly connected to the belt ring by welding or embedding, and the other end is inserted into the track cavity of the movable track.

[0008] Preferably, the metal rod is made of stainless steel, and the surface is coated with a silver ion antibacterial coating.

[0009] Preferably, the band ring is made of medical stainless steel, and a connecting portion is provided on the tongue side, and the connecting portion is fixedly connected to the metal rod by welding or embedding.

[0010] Preferably, the spring is a helical compression spring, which is arranged inside the movable track, one end of which is fixed to the inner wall of the movable track, and the other end is connected to the metal rod; the elastic direction of the spring is consistent with the direction in which the metal rod is inserted into the movable track, and is used to drive the metal rod to move along the movable track.

[0011] Preferably, the stop valve is a screw structure, including a screw arranged on a movable track, and the metal rod is provided with a plurality of recesses along its length direction that cooperate with the end of the screw; when the screw is tightened, the end of the screw is stuck in the recess to locate and fix the position of the metal rod.

[0012] Preferably, the inner wall surface of the movable track is provided with a lubricating coating, and the lubricating coating is polytetrafluoroethylene or a similar material, which covers the inner wall of the entire track cavity and is used to reduce the friction between the inner wall and the metal rod.

[0013] Preferably, the inner surface of the band is formed with a plurality of uniformly arranged micro-protrusions or striped rough textures, and the rough texture is made by metal etching or embossing process to increase the surface friction between the band and the tooth surface in the contact area.

[0014] Preferably, a baffle structure is provided at the end of the metal rod, and a limiting groove is provided at the end of the movable track. The baffle structure cooperates with the limiting groove to prevent the metal rod from escaping from the movable track due to excessive movement; the limiting groove is a closed structure surrounding the track cavity, and its opening size is smaller than the outer diameter of the baffle structure.

[0015] The present invention has novel structure, ingenious design, simple and convenient operation, and has the following advantages compared with the prior art: Automatic adjustment improves correction efficiency: This device realizes automatic movement and adjustment of the metal rod by setting up an adjustment component with a spring and a movable track. Compared with traditional arch expansion devices that require manual operation, it can expand the width of the dental arch in a more precise and uniform manner, improve correction efficiency, and reduce the frequency of patient follow-up visits.

[0016] The structure fits the oral anatomy and improves wearing comfort: The metal rod adopts an arc design, which is close to the arc distribution of the upper jaw surface, avoiding the gum compression caused by the rigid design. Combined with the rough texture design on the inner surface of the band ring, the stability and wearing comfort of the device are enhanced, which is especially suitable for the long-term wearing needs of teenagers.

[0017] The stop valve function switches to meet diverse needs: The stop valve on the device adopts a screw structure, which controls the elastic release state of the spring to achieve free switching between automatic and manual expansion. When the stop valve is opened, the spring drives the metal rod to move automatically along the movable track to achieve efficient automatic expansion; when the stop valve is closed, the spring tension is locked, and the device can achieve more sophisticated expansion operations through manual adjustment, thereby meeting the correction needs of different patients and improving the flexibility and accuracy of correction.

[0018] Antibacterial coating design reduces the risk of oral infection: The surface of the metal rod is coated with a silver ion antibacterial coating to effectively inhibit bacterial growth. Combined with the use of medical stainless steel materials, it further reduces the risk of oral infection when worn by teenagers and meets the hygiene requirements of medical devices.

[0019] The limiting structure prevents the device from falling off and improves safety: a baffle structure is designed at the end of the metal rod, and cooperates with the limiting groove at the end of the movable track to prevent the metal rod from falling out due to excessive movement, ensuring that the device is stable and reliable during wearing and will not cause correction interruption or patient discomfort due to falling off.

[0020] Lubricating coating reduces friction and extends the service life of the device: The inner wall surface of the movable track is covered with a polytetrafluoroethylene lubricating coating, which effectively reduces the friction resistance during the movement of the metal rod, not only improving the smoothness of operation, but also extending the overall service life of the device and reducing the economic burden on patients. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1This is the first axonometric view of the automatic bow expansion device for teenagers with an adjustment track of the present invention.

[0022] Figure 2 This is a second axonometric view of the automatic bow expansion device for teenagers with an adjustment track of the present invention.

[0023] Figure 3 The present invention is a cross-sectional view of the adjustment track of the automatic arch expansion device for teenagers with the adjustment track.

[0024] In the attached drawings: 1-belt ring, 2-metal rod, 3-movable track, 4-stop valve, 5-arch wire, 6-spring. DETAILED DESCRIPTION

[0025] The following are specific embodiments of the present invention, and the technical solutions of the present invention are further described in conjunction with the accompanying drawings, but the present invention is not limited to these embodiments.

[0026] like Figure 1-3 As shown, the present invention provides a juvenile automatic arch expansion device with an adjustment track, which mainly comprises a band ring 1, a metal rod 2, a movable track 3, a spring 6 and a stop valve 4. The device realizes the automatic arch expansion and manual adjustment functions of the juvenile dental arch through the mutual cooperation of the above components, and has the characteristics of compact structure, convenient operation and comfortable wearing.

[0027] The band 1 of the device is fixed to any of the maxillary teeth 4-8 and is set on the lingual side of the selected tooth by welding or embedding, which has a good fixing effect. The inner surface of the band 1 forms a plurality of micro-convex points or striped rough textures, which are made by metal etching or embossing process, and can significantly increase the friction between the band 1 and the tooth surface, ensuring the stability of the device during wearing. By optimizing the material and design of the band, the correction deviation caused by the sliding of the device can be effectively avoided.

[0028] The two ends of the metal rod 2 are respectively connected between the belt ring 1 and the movable track 3. It extends from the lingual side of the belt ring 1 toward the palate. It adopts an arc design to fit the natural curvature of the palate surface, thereby reducing the discomfort of the patient during wearing. The metal rod 2 is made of stainless steel and coated with a silver ion antibacterial coating on the surface, which can effectively reduce the growth of bacteria in the oral cavity and reduce the risk of oral infection in patients. At the same time, one end of the metal rod 2 is inserted into the track cavity of the movable track 3, and it slides smoothly under the guidance of the track cavity. The other end is connected to the belt ring 1 by welding or embedding to form a stable structural support.

[0029] The movable track 3 is arranged in close contact with the surface of the upper jaw, and a track cavity is provided inside the track that runs through the entire length of the track to accommodate and guide the movement of the metal rod 2. The inner wall surface of the movable track 3 is coated with a polytetrafluoroethylene lubricating coating, which effectively reduces the friction resistance of the metal rod 2 during movement, not only ensuring the smooth operation of the device, but also extending the service life of the device. A limit groove is provided at the end of the track, and the limit groove cooperates with the baffle structure at the end of the metal rod 2 to prevent the metal rod 2 from falling out of the movable track 3 due to excessive movement, thereby improving the safety and reliability of the device.

[0030] The spring 6 is arranged in the track cavity of the movable track 3 and arranged along the length direction of the movable track 3. One end of the spring 6 is fixed to the inner wall of the track cavity, and the other end is connected to the metal rod 2 inserted into the track cavity. The spring 6 is a helical compression spring with excellent elastic recovery performance, and its elastic direction is consistent with the moving direction of the metal rod 2. When the stop valve 4 is opened, the elastic force of the spring 6 drives the metal rod 2 to move along the movable track 3, realizing an efficient automatic expansion function; when the stop valve 4 is closed, the elastic release of the spring 6 is locked, and the device can manually adjust the position of the metal rod 2 to achieve a more precise correction operation.

[0031] The stop valve 4 is located outside the movable track 3. It adopts a screw structure design and can control the elastic release state of the spring 6 by rotating the screw. The metal rod 2 is provided with multiple recesses along the length direction to cooperate with the stop valve 4. When the stop valve 4 is tightened, the end of the screw is stuck in the recess, which can accurately fix the position of the metal rod 2 and ensure the stability of the device during the correction process. By controlling the switch state of the stop valve 4, the user can freely switch between the automatic expansion mode and the manual expansion mode to meet the correction needs of different patients.

[0032] The present invention forms a functionally complete and scientifically designed automatic arch expansion device for adolescents through the stable fixation of the ring 1, the flexible connection of the metal rod 2, the smooth guidance of the movable track 3, and the precise control of the spring 6 and the stop valve 4, thereby providing a more efficient and comfortable correction solution for clinical practice.

[0033] The metal rod 2 is an arc-shaped rod, and its design fully considers the anatomical structure of the upper jaw. The arc-shaped distribution fits the upper jaw surface, ensuring the high adaptability of the device to the patient's oral cavity during wearing, and effectively reducing the discomfort and foreign body sensation caused by wearing. One end of the metal rod 2 is firmly connected to the belt ring 1 by welding or embedding. This connection method not only provides good stability, but also ensures the durability and tensile strength of the entire device, avoiding loosening or deformation caused by frequent use or stress.

[0034] The other end of the metal rod 2 is inserted into the track cavity of the movable track 3, and the track cavity provides precise guidance for the movement of the metal rod 2. The inner wall of the track cavity is coated with a lubricating coating of polytetrafluoroethylene or similar materials, which greatly reduces the friction of the metal rod 2 during movement, making it smoother during the expansion process, and effectively extending the service life of the device. In addition, a baffle structure is provided at the end of the metal rod 2, which cooperates with the limit groove of the movable track 3. The limit groove is a closed structure, and its opening size is smaller than the outer diameter of the baffle structure, which can effectively prevent the metal rod 2 from leaving the track cavity due to excessive movement, thereby improving the safety and reliability of the device.

[0035] The surface of the metal rod 2 is also coated with a silver ion antibacterial coating, which has excellent antibacterial properties and can significantly reduce the growth of bacteria in the oral cavity and reduce the risk of infection in patients. This coating not only enhances the hygienic performance of the device, but also further improves the safety and comfort of patients during wearing. In addition, the metal rod 2 is made of high-strength medical stainless steel material, which has excellent strength and toughness. It can withstand a certain amount of mechanical force during the correction process without deformation, providing reliable physical support for the device's arch expansion function.

[0036] The band 1 is made of medical stainless steel, which has high strength, corrosion resistance and biocompatibility, ensuring the safety and stability of the device during long-term use in the oral cavity. The design of the band 1 is based on the shape of maxillary teeth 4-8, and the precision manufacturing process ensures that its inner surface fits perfectly with the tooth surface, thereby effectively preventing discomfort or deviation in correction effect caused by looseness or sliding during wearing.

[0037] The tongue side of the band 1 is provided with a connection part, which serves as the main fixing structure between the metal rod 2 and the band 1, and is reliably connected to the metal rod 2 by welding or embedding. The welding method can form a permanent connection with high strength and good sealing, ensuring that the metal rod 2 is not easy to fall off during the operation of the device; the embedding method can provide a certain degree of flexibility, facilitate the installation and maintenance of the device, and also meet the personalized customization needs of different patients. Regardless of which method is used, the structure of the connection part is optimized to provide a stable connection while reducing the pressure on the tongue and surrounding soft tissues, further improving the wearing comfort.

[0038] In addition, the inner surface of the band 1 is provided with a layer of fine micro-convex dots or striped rough textures, which are made by metal etching or embossing, and can effectively increase the friction between the band 1 and the tooth surface, significantly improve the fixing effect of the band 1 during wearing, and prevent the device from sliding due to the moist oral environment. This design not only improves the stability of the device, but also reduces the inconvenience caused by the movement of the device in the patient's daily life, and is particularly suitable for the daily state of frequent activities of teenagers.

[0039] The spring 6 is a helical compression spring with a compact design structure and excellent elastic recovery performance. The spring 6 is arranged inside the movable track 3 and arranged along the length direction of the track cavity. It cooperates with the metal rod 2 and drives the metal rod 2 to move precisely along the movable track 3 by releasing the elastic energy of the spring, thereby realizing the automatic bow expansion function. The elastic direction of the spring 6 is consistent with the direction in which the metal rod 2 is inserted into the movable track 3, ensuring the efficient transmission of the driving force and avoiding deviation or power loss.

[0040] One end of the spring 6 is fixed to the inner wall of the movable track 3, and the fixing point is firmly connected by welding or embedding, etc., and can withstand continuous elastic stress without loosening or falling off. The other end of the spring 6 is connected to the metal rod 2 inserted into the track cavity, and the driving force is ensured to act in the axial direction of the metal rod 2 through precise matching. This design not only ensures the movement stability of the metal rod 2, but also avoids vibration or jamming caused by uneven elastic force.

[0041] In addition, the spiral compression characteristics of the spring 6 allow it to store sufficient elastic energy when compressed by external force. When the stop valve 4 is opened, the spring 6 will quickly release the elastic force, pushing the metal rod 2 to automatically move along the movable track 3, thereby realizing the expansion operation without manual intervention. This automated function significantly improves the correction efficiency, reduces the frequency of patient follow-up visits and manual adjustments, and reduces the errors that may be caused during the correction process.

[0042] When the stop valve 4 is closed, the elastic release of the spring 6 is locked, and the position of the metal rod 2 remains unchanged, providing precise operational support for manual arch expansion. This dual-function design enables the device to meet the needs of automated correction and achieve more precise correction operations through manual adjustment, greatly improving the flexibility and applicability of the device.

[0043] The stop valve 4 is a screw structure, and adopts a tightening screw with exquisite design and convenient operation, which can effectively realize the positioning and fixing function of the metal rod 2. The stop valve 4 is arranged outside the movable track 3, and is firmly connected to the movable track 3 through a precisely machined thread structure, and the end of the screw can be tightly matched with multiple recesses arranged along the length direction of the metal rod 2.

[0044] The depressions on the metal rod 2 are processed by precision cutting or stamping. The depressions are evenly spaced and have a moderate depth, which can ensure the stability of the engagement with the end of the screw. The design of the depressions not only provides multiple positioning options, but also meets the need for fine-tuning the position of the metal rod 2 during the correction process. When the screw is tightened, the end of the screw will be stuck in a depression on the metal rod 2, thereby locking the current position of the metal rod 2. The locking structure can withstand the external force generated during the expansion process, prevent the metal rod 2 from accidentally sliding or loosening in the movable track 3, and ensure the stability and safety of the correction process.

[0045] The screw structure of the stop valve 4 also supports flexible state switching. When automatic bow expansion is required, the user only needs to loosen the stop valve 4 to release the elastic effect of the spring 6, and the metal rod 2 can move freely along the movable track 3 to achieve the effect of automatic bow expansion; when manual bow expansion or fixing the position of the metal rod 2 is required, tightening the stop valve 4 can lock the position of the metal rod 2, providing accurate and stable manual adjustment function.

[0046] The stop valve 4 has a simple structural design but multiple functions, which not only improves the convenience of operation of the device, but also enhances the correction accuracy of the device. Through the adjustable positioning and locking mechanism, the stop valve 4 can adapt to the correction needs of different patients, provide personalized arch expansion solutions, and significantly reduce the trouble of frequent follow-up visits and manual operations, thereby improving the efficiency of clinical use and the comfort of patients.

[0047] The inner wall surface of the movable track 3 is provided with a lubricating coating, which is made of polytetrafluoroethylene (PTFE) or similar materials. Polytetrafluoroethylene is an ideal lubricating material due to its low friction coefficient and excellent wear resistance, which can significantly reduce the friction of the metal rod 2 when it moves in the track cavity. The coating evenly covers the inner wall of the entire track cavity, and the coating thickness is ensured to be consistent through precise processing, thereby ensuring the smooth movement of the metal rod 2 and the stability of the device operation.

[0048] The low friction property of the lubricating coating allows the metal rod 2 to slide smoothly under the drive of the spring 6, thereby realizing an efficient automatic arch expansion function, while reducing the vibration and noise caused by friction during the movement of the metal rod 2, thereby improving the comfort of the patient when wearing it. Especially in the case of repeated adjustment of the position of the metal rod 2 or long-term use of the device, the presence of the coating can effectively extend the service life of the movable track 3 and the metal rod 2 and reduce the wear of the components.

[0049] In addition, the coating material has good chemical resistance and biocompatibility. Even if it is used for a long time in a moist oral environment, it will not be affected by saliva or oral cleaners to affect its lubrication effect or safety. Its smooth surface and the characteristics of not easily adhering to dirt also reduce the possibility of bacterial growth, further improving the hygiene performance of the device and the patient's experience.

[0050] The end of the metal rod 2 is provided with a baffle structure, which is designed to provide effective limit protection when the metal rod 2 moves along the movable track 3. The baffle structure is made of high-strength material, integrally formed with the metal rod 2 or fixed by a precision connection process, and has good tensile strength and durability. The size of the baffle structure is precisely designed to ensure that while maintaining the flexibility of the metal rod 2, it can accurately match the limit groove of the movable track 3, thereby preventing the metal rod 2 from leaving the track cavity due to excessive movement.

[0051] A limit groove is provided at the end of the movable track 3. The limit groove is a closed structure surrounding the track cavity, and the opening size is smaller than the outer diameter of the baffle structure. When the metal rod 2 moves to the end of the track cavity during the drive of the spring 6 or manual adjustment, the baffle structure will come into contact with the limit groove, and prevent the metal rod 2 from moving further through mechanical locking to prevent it from escaping from the track cavity. The surrounding design of the limit groove provides an all-round limiting effect, ensuring that the metal rod 2 always remains in the movable track 3 even when it is subjected to forces in multiple directions.

[0052] The matching design of the baffle structure and the limit groove not only ensures the safety of the device during the correction process, but also improves the overall reliability of the device. Even under the strong elasticity of the spring 6, the metal rod 2 will not fall out of the track cavity due to inertia or excessive pushing, thereby avoiding unnecessary discomfort to the patient or interruption of the correction process due to the falling of components.

[0053] In addition, the matching design of the baffle structure and the limit groove also optimizes the operational flexibility of the device. When the user manually adjusts the position of the metal rod 2, there is no need to worry about the movement range exceeding the limit of the track cavity, which not only improves the convenience of operation, but also reduces the potential damage to the device components. This design fully considers the safety needs in actual use scenarios and provides important technical guarantees for the long-term use of the device.

[0054] The method of using this device is as follows: ① First, the orthodontist will conduct a comprehensive assessment of the patient's teeth and dental arches to determine the location of the fixed band (usually one of the maxillary teeth 4-8). The target tooth is thoroughly cleaned to ensure that the tooth surface is dry and free of dirt. Then, a suitable band 1 is selected according to the patient's tooth morphology and fixed on the lingual side of the target tooth. When fixing the band, it can be welded or embedded to ensure close contact with the tooth surface, thereby providing the stability required for long-term wear.

[0055] ② Next, fix one end of the metal rod 2 to the connecting part of the belt ring 1 by welding or embedding. During the installation process, the arc-shaped part of the metal rod 2 needs to fit the patient's upper jaw surface so that it is arranged along the natural curvature of the upper jaw, and the other end is inserted into the track cavity of the movable track 3 to ensure that the metal rod 2 can move smoothly in the track cavity. After installation, check the fixation of the metal rod 2 and its sliding effect with the track cavity.

[0056] ③ Fix the movable track 3 to the patient's upper jaw surface, ensuring that the lubricating coating on the inner wall of the track cavity is intact, so as to reduce the friction of the metal rod 2 and improve the smoothness of movement. At the same time, install the spring 6, fix one end of it to the inner wall of the track cavity, and connect the other end to the metal rod 2. Adjust the position of the spring 6 so that it is in a natural compression state, so that the elastic effect can be released to push the metal rod 2 to move when needed.

[0057] ④ After the device is installed, adjust the state of the stop valve 4 according to the correction requirements. If automatic arch expansion is required, loosen the stop valve 4, release the elastic effect of the spring 6, and move the metal rod 2 slowly along the movable track 3 to gradually expand the width of the dental arch. During the automatic arch expansion process, the doctor needs to regularly check the operating status of the device to confirm whether the arch expansion process is as expected, and observe whether the movement range of the metal rod 2 is effectively limited by the baffle structure and the limit groove.

[0058] ⑤ If you need to fine-tune or pause the automatic expansion, you can lock the position of the metal rod 2 by tightening the stop valve 4 to prevent it from moving in the active track 3. With this manual fixation function, doctors can achieve more precise expansion operations to meet special correction needs. In this state, the patient can still wear the device normally without additional operation.

[0059] ⑥ During long-term wearing, patients are advised to follow the doctor's instructions and maintain good oral hygiene habits, including daily cleaning of teeth and avoiding eating hard or sticky foods to reduce external force impact on the device. If the patient feels any discomfort or the device becomes loose, the doctor should be informed in time for adjustment.

[0060] ⑦ Regular follow-up is a key link in long-term wearing of the device. The doctor needs to evaluate the operating effect of the device according to the expansion progress of the patient's dental arch, and adjust the state of the stop valve 4 or change the elastic range of the spring 6 according to the specific situation. At the same time, check the integrity of the device, including whether the connection between the ring 1, metal rod 2, movable track 3 and stop valve 4 is firm, whether the lubricating coating is effective, and whether the limit groove and baffle structure are working properly.

[0061] ⑧ During the entire use period, the device does not need to be frequently disassembled. Through the fixed design of the belt ring 1 and the stable design of the movable track 3, the device can operate stably for a long time, meet the wearing needs of teenagers in daily life, and provide lasting support and effect for dental arch expansion and correction.

Claims

1. An automatic bow expansion device for teenagers with an adjustment track, characterized in that: include: A band (1) fixed to any of the maxillary teeth No. 4 to No. 8, wherein the band (1) is arranged at the lingual side of the selected tooth by welding or other fixing methods; Two metal rods (2) connected to the band ring (1), the metal rods (2) extending from the lingual side of the band ring (1) towards the palate and arranged in an arc-shaped structure conforming to the surface of the palate; An adjustment component with a movable track (3), the adjustment component being arranged in contact with the surface of the upper jaw, the movable track (3) being provided with a track cavity for guiding the movement of the metal rod (2), one end of the metal rod (2) being inserted into the track cavity and extending along the movable track (3), and the position of the metal rod (2) being adjusted and fixed by the adjustment component; A spring (6) is disposed in the movable track (3), the spring (6) being arranged along the length direction of the movable track (3) and connected to a metal rod (2) inserted into the track cavity, and the metal rod (2) is driven to move in the movable track (3) through the elastic action of the spring (6); A stop valve (4) is arranged on the movable track (3), and the stop valve (4) is used to control the elastic release state of the spring (6). When the stop valve (4) is opened, the spring (6) drives the metal rod (2) to move along the movable track (3); when the stop valve (4) is closed, the position of the metal rod (2) is locked to prevent it from moving in the movable track (3).

2. The automatic bow expansion device for teenagers with an adjustment track as claimed in claim 1, characterized in that: The metal rod (2) is an arc-shaped rod, one end of which is fixedly connected to the belt ring (1) by welding or embedding, and the other end of which is inserted into the track cavity of the movable track (3).

3. The automatic bow expansion device for teenagers with an adjustment track as claimed in claim 1, characterized in that: The metal rod (2) is made of stainless steel, and its surface is coated with a silver ion antibacterial coating.

4. The automatic bow expansion device for teenagers with an adjustment track as claimed in claim 1, characterized in that: The band ring (1) is made of medical stainless steel, and a connecting portion is provided on the tongue side, wherein the connecting portion is fixedly connected to the metal rod (2) by welding or embedding.

5. The automatic bow expansion device for teenagers with an adjustment track as claimed in claim 1, characterized in that: The spring (6) is a helical compression spring, which is arranged inside the movable track (3), one end of which is fixed to the inner wall of the movable track (3), and the other end of which is connected to the metal rod (2); the elastic direction of the spring (6) is consistent with the direction in which the metal rod (2) is inserted into the movable track (3), and is used to drive the metal rod (2) to move along the movable track (3).

6. The automatic bow expansion device for teenagers with an adjustment track as claimed in claim 1, characterized in that: The stop valve (4) is a screw structure, comprising a screw arranged on a movable track (3), and the metal rod (2) is provided with a plurality of recesses along its length direction for matching with the ends of the screw; when the screw is tightened, the ends of the screw are inserted into the recesses for positioning and fixing the position of the metal rod (2).

7. The automatic bow expansion device for teenagers with an adjustment track as claimed in claim 1, characterized in that: The inner wall surface of the movable track (3) is provided with a lubricating coating, which is made of polytetrafluoroethylene or a similar material and covers the inner wall of the entire track cavity, and is used to reduce friction between the inner wall and the metal rod (2).

8. The automatic bow expansion device for teenagers with an adjustment track as claimed in claim 1, characterized in that: The inner surface of the band (1) is formed with a plurality of uniformly arranged micro-convex points or striped rough textures, wherein the rough texture is produced by metal etching or embossing technology and is used to increase the surface friction of the contact area between the band (1) and the tooth surface.

9. The automatic bow expansion device for teenagers with an adjustment track as claimed in claim 1, characterized in that: A baffle structure is provided at the end of the metal rod (2), and a limit groove is provided at the end of the movable track (3). The baffle structure cooperates with the limit groove to prevent the metal rod (2) from escaping from the movable track (3) due to excessive movement. The limit groove is a closed structure surrounding the track cavity, and its opening size is smaller than the outer diameter of the baffle structure.

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