Vertical molar fixation device

Abstract

The application relates to the field of orthodontics, in particular to a vertical molar fixing device, which comprises a fixing ring, a traction connecting rod and a traction member. The fixing ring is matched with a target premolar, the fixing ring is used for sleeving the premolar, one end of the traction connecting rod is connected with the side wall of the outer circumferential surface of the fixing ring, the other end of the traction connecting rod extends away from the fixing ring, a pulling hook is arranged at the end of the traction connecting rod away from the fixing ring, one end of the traction member is detachably connected with the pulling hook, and the other end of the traction member is connected with the target tooth; the traction member pulls the target tooth when being tensioned. The fixing ring is arranged on the premolar to fix the traction connecting rod. The traction member connected with the traction connecting rod is used for pulling the supernumerary tooth. The fixing ring has a simple structure and can be directly fixed on the tooth without the aid of additional screws, so that the installation steps and the device structure are simplified, and the experience of the patient after installation is improved.

Description

Technical Field

[0001] This application relates to the field of orthodontic equipment, and in particular to a vertical molar fixation device. Background Technology

[0002] Mesial impaction of terminal molars is a common case in orthodontic clinics. It often presents as mesial tilting of the molar, insufficient eruption height, and most of the crown surface covered by gingival and bone tissue. Orthodontic methods are needed to move the tooth distally and vertically. Currently, commonly used traction methods in clinical practice include traditional archwires, chains, rubber bands, and mini-implant anchorage, but all have significant limitations: traditional archwire traction relies on single adjacent tooth anchorage, which can easily lead to loosening or displacement of the anchored tooth, and the inaccurate force line control can easily cause tooth tilting; although chains and rubber bands are simple to operate, the force value is unstable and the distribution of the point of action is uneven, which can easily cause soft tissue compression or gingival recession; although mini-implant anchorage provides independent anchorage, it has surgical trauma, complex operation, and postoperative infection risks.

[0003] Meanwhile, existing technologies generally suffer from insufficient mechanical design, lack dynamic force line adjustment mechanisms, and are prone to deviating from the center of tooth impedance, leading to pathological movement; the anchorage system has poor stability, especially prone to anchorage failure in multi-tooth traction; the device structure is highly complex, with some requiring integration with denture bases or skeletal anchorage, increasing size and causing patient discomfort; biocompatibility is also lacking, with metal components easily inducing inflammation and elastic materials easily degrading and breaking. Although the academic community has attempted to optimize through techniques such as finite element analysis and detachable accessories, a standardized solution that balances mechanical rationality, ease of operation, and patient comfort has not yet been formed, especially among children and adolescents, where mucosal irritation and compliance issues are more prominent. Utility Model Content

[0004] To solve, or at least partially solve, the aforementioned technical problems, this application provides a vertical molar fixation device, comprising: a fixing ring, a traction rod, and a pulling member. The fixing ring is matched with a target premolar, or a premolar and a molar, and is used to fit over the premolar or the premolar and the molar. One end of the traction rod is connected to the side wall of the outer peripheral surface of the fixing ring, and the other end of the traction rod extends away from the fixing ring, with a hook provided at the end of the traction rod away from the fixing ring. One end of the pulling member is detachably connected to the hook, and the other end of the pulling member is connected to the target tooth; when tensioned, the pulling member pulls the target tooth.

[0005] Preferably, the fixing ring includes a first ring and a second ring. A traction link is connected to the first ring, and the second ring is connected to the outer circumferential surface of the first ring on the side away from the traction link. The first and second rings are respectively fitted onto two adjacent premolars, with the second ring being smaller than the first ring.

[0006] Preferably, the outer circumferential surface of the first belt ring is provided with multiple mounting holes, which are matched with the traction link. The traction link is inserted into different mounting holes and fixed so that the traction link forms different traction angles.

[0007] Preferably, the traction link includes a first link portion and a second link portion. One end of the first link portion matches the mounting hole and is connected to the first belt loop, and the other end of the first link portion is provided with a hook. The second link portion also matches the mounting hole and is connected to the first belt loop at one end, and the other end of the second link portion is provided with a hook. The hooks of the first link portion and the hooks of the second link portion are symmetrically arranged.

[0008] Preferably, the first link portion and the second link portion are curved, and the curvature of the first link portion and the second link portion increases first and then decreases from the connection point with the first belt ring, and matches the gums in the oral cavity.

[0009] Preferably, the range of the arc values ​​of the first link section and the second link section is greater than 0 and less than π / 6.

[0010] Preferably, the hook includes: a first vertical section, a first curved section, and a second vertical section. The first vertical section is connected to the end of the traction link away from the fixed belt loop, one end of the first curved section is connected to the first vertical section, and the second vertical section is connected to the end of the first curved section away from the first vertical section. The first vertical section, the first curved section, and the second vertical section form a first U-shaped hook.

[0011] Preferably, the hook further includes: a second curved section and a third vertical section, one end of the second curved section is connected to the second vertical section, the second curved section has the opposite bending direction to the first curved section, the third vertical section is connected to the second curved section, and the second vertical section, the second curved section and the third vertical section form a second U-shaped hook;

[0012] The first and second curved sections can change their curvature under the action of external force, thereby changing the opening size of the first and second U-shaped hooks.

[0013] Preferably, the hook has spaced winding positions so that the pulling member can be engaged in the winding positions and wound.

[0014] Preferably, the fixing device further includes: an elastic pad, evenly distributed on the inner sidewall of the inner ring of the fixing belt ring, the elastic pad having a matrix of protrusions distributed on it.

[0015] Compared to existing technologies, this application utilizes a fixing band that is fitted onto the premolar, or a combination of premolar and molar. This fixing band secures the traction link, allowing the traction direction and angle to be adjusted according to the patient's individual needs. Combined with the traction device, it effectively pulls the impacted tooth. The simplified structure of the fixing band streamlines the setup of other components during fixation, eliminating the need for screws or other fastening methods. This reduces the number of steps involved in the fixation process, avoids secondary injury to the patient, and significantly improves the user experience. Attached Figure Description

[0016] To more clearly illustrate the embodiments of this application, the relevant drawings will be briefly described below. It is understood that the drawings described below are only for illustrating some embodiments of this application, and those skilled in the art can obtain many other technical features and connections not mentioned herein based on these drawings.

[0017] Figure 1 This is a three-dimensional structural schematic diagram of a vertical molar fixing device according to an embodiment of this application;

[0018] Figure 2 This is a three-dimensional structural schematic diagram of a vertical molar fixing device according to an embodiment of this application;

[0019] Figure 3 This is a three-dimensional structural diagram of the side of a vertical molar fixing device according to an embodiment of this application;

[0020] Figure 4 This is a three-dimensional structural schematic diagram of a vertical molar fixing device according to an embodiment of this application;

[0021] Figure 5 This is a three-dimensional structural schematic diagram of a vertical molar fixing device according to an embodiment of this application;

[0022] Figure 6 This is a schematic diagram of the structure of a vertical molar fixing device according to an embodiment of this application, in which the pulling member is wound around the hook.

[0023] Explanation of reference numerals in the attached figures:

[0024] 1. Fixed belt ring; 11. First belt ring; 111. Mounting hole; 12. Second belt ring; 2. Traction link; 21. First link section; 22. Second link section; 3. Hook; 31. First vertical section; 32. Second vertical section; 33. Third vertical section; 34. First curved section; 35. Second curved section; 4. Pulling component; 41. Pulling chain; 42. Suction cup. Detailed Implementation

[0025] The present application will now be described in detail with reference to the accompanying drawings.

[0026] Mesial impaction of terminal molars is a common case in orthodontic clinics. It often presents as mesial tilting of the molar with insufficient eruption height, and most of the crown surface is covered by gingival and bone tissue. Orthodontic methods are needed to move the tooth distally and vertically. Among the clinical repositioning methods for impacted teeth, mechanical traction is a core technology for preserving natural tooth function, and the precision of its biomechanical control is a key factor affecting the treatment efficacy.

[0027] While current traction techniques have established operational systems such as archwire elastic ligation, leather chain suspension, or combined traction with mini-implant implants, they suffer from the following technical bottlenecks: Inaccurate vector control of traction force, with three-dimensional spatial deviations between the force application point and the center of tooth impedance, easily inducing abnormal eruption patterns such as tilting, movement, or rotation of impacted teeth. Anchorage design is often limited to the natural tooth anchorage of a single molar, resulting in insufficient stability during long-term traction and a tendency for anchorage tooth loosening or displacement. While skeletal anchorage techniques such as mini-implant implantation can enhance anchorage, they often require secondary surgery for implantation and removal, increasing treatment costs and posing risks of postoperative complications such as peri-implantitis. The size and shape of traditional traction components are insufficient to meet the needs of narrow intraoral spaces, and long-term wear can cause chronic mechanical irritation of the buccal mucosa or tongue soft tissues, directly affecting patient compliance.

[0028] In view of this, the first embodiment of this application proposes a vertical molar fixing device to solve the above-mentioned technical problems.

[0029] First Implementation Method

[0030] refer to Figure 1 , Figure 2 , Figure 3 and Figure 4 This application provides a vertical molar fixation device, which includes: a fixing ring 1, a traction rod 2, and a pulling member 4. The fixing ring 1 is matched with the target premolar, or the premolar and the molar, and is used to fit on the premolar. One end of the traction rod 2 is connected to the side wall of the outer peripheral surface of the fixing ring 1, and the other end of the traction rod 2 extends away from the fixing ring 1. A hook 3 is provided at the end of the traction rod 2 away from the fixing ring 1. One end of the pulling member 4 is detachably connected to the hook 3, and the other end of the pulling member 4 is connected to the target tooth; when tensioned, the pulling member 4 pulls the target tooth.

[0031] When performing impacted tooth traction, firstly, the fixing band 1 is placed on the target premolar, or premolar and molar. The fixing band 1 matches the shape of the premolar, or premolar and molar, and through the friction between them, the fixing band 1 is firmly fixed to the premolar, or premolar and molar. Since the fixing band 1 is fixed, the traction rod 2 connected to the fixing band 1 is also correspondingly fixed. Next, refer to... Figure 6As shown, one end of the traction member 4 is fixed to the hook 3 of the traction link 2, and the other end is fixed to the target impacted tooth via the suction cup 42. By tensioning the traction member 4, traction of the impacted tooth can be achieved. The hook 3 at the end of the traction link 2 is designed to facilitate the winding and fixing of the traction member 4, thereby meeting the tensioning requirements of the traction member 4.

[0032] Since the traction link 2 is fixed by the fixing band 1, it can obtain traction force by means of the fixing band 1, which is sleeved on the premolar or on both premolars and molars. The fixing band 1 is kept stationary by the fixation of the premolars and molars to maintain a continuous output of traction force, thereby helping to pull out the impacted tooth. The fixing band 1 is not only simple in structure, but its design of being sleeved on the premolar simplifies the fixation method and avoids the need for implants during the fixation of the traction link 2, thereby reducing damage to the patient's oral cavity and improving the patient's wearing experience. In addition, the length of the traction link 2 can be adjusted according to the patient's actual situation. For example, when it is necessary to pull from the distal end of the impacted tooth, a longer traction link 2 can be set to cross over and fix the traction member 4 from the top of the impacted tooth, so that the traction member 4 can pull the impacted tooth from the distal end, thereby adapting to the needs of different traction directions and better meeting the needs of more patients.

[0033] Second Implementation Method

[0034] In the first embodiment of this application, the combination of the fixing band 1 and the traction link 2 achieves fixation of the traction link 2 on the premolar or between the premolar and molar. This not only simplifies the fixation process of the traction link 2 but also reduces damage to the patient. Specifically, during the traction of impacted teeth, the traction force mainly depends on the premolar and molar. The fixation between the traction link 2 and the premolar and molar is achieved through the fixing band 1. Therefore, the firmness of the fixation between the fixing band 1 and the premolar and molar directly affects the traction effect during the traction process. For impacted teeth with more extreme orientations, a more stable and firm connection between the fixing band 1 and the premolar and molar may be required to ensure that more traction force can be obtained.

[0035] In view of this, refer to Figure 1 , Figure 2 , Figure 5 The improvement of the second embodiment of this application compared to the first embodiment is that the fixing ring 1 includes a first ring 11 and a second ring 12. The traction link 2 is connected to the first ring 11, and the second ring 12 is connected to the outer peripheral surface of the first ring 11 on the side away from the traction link 2. The first ring 11 and the second ring 12 are used to be respectively fitted onto two adjacent premolars, or a premolar and a molar, and the second ring 12 is smaller than the first ring 11.

[0036] When preparing for the traction of impacted teeth, the first band 11 and the second band 12 must first be simultaneously fitted onto the premolars, or the premolars and molars. Considering the physiological characteristic that human teeth gradually increase in size from the inside out, the second band 12 is designed to be smaller than the first band 11 to better match the structure of human teeth. By fitting the first band 11 and the second band 12 together onto the corresponding premolars or molars, a more stable fixing base can be provided for the traction link 2. In addition, the interaction between the first band 11 and the second band 12 can effectively prevent the anchorage teeth from loosening and shifting.

[0037] This design ensures that the traction link 2 remains in the predetermined target fixed posture, thus guaranteeing the normal progress of the impacted tooth traction process. Simultaneously, it improves the quality of impacted tooth traction, allowing the impacted tooth to grow in the predetermined direction. Through this precise fixation and coordination, not only is the traction effect enhanced, but the treatment also provides greater safety and reliability for the patient.

[0038] Furthermore, refer to Figure 2 and Figure 4 The outer circumferential surface of the first belt ring 11 shown has multiple mounting holes 111. The mounting holes 111 are matched with the traction link 2. The traction link 2 is inserted into different mounting holes 111 and fixed so that the traction link 2 forms different traction angles.

[0039] Different patients have different tilting directions and required traction directions for their impacted teeth. Therefore, to accommodate these individual needs, the traction link 2 needs to be set with different lengths and tilt angles. This design aims to ensure that the traction member 4 can achieve an appropriate tension and be firmly fixed, while also better adapting to the patient's oral condition. Multiple mounting holes 111 are provided on the traction link 2, allowing the traction link 2 to match different mounting holes 111, thus enabling the fixed traction link 2 to form different angles with the first band 11. By adjusting the positional relationship between the traction link 2 and the first band 11, the traction angle for the impacted tooth can be further optimized. This flexible adjustment mechanism can meet the personalized needs of different patients, ensuring that the traction process is both precise and efficient, ultimately achieving the best treatment results.

[0040] In addition, refer to Figure 1 The traction link 2 shown includes a first link portion 21 and a second link portion 22. One end of the first link portion 21 matches the mounting hole 111 and is connected to the first belt loop 11, while the other end of the first link portion 21 is provided with a hook 3. The second link portion 22 also matches the mounting hole 111 and is connected to the first belt loop 11 at one end, while the other end of the second link portion 22 is provided with a hook 3. The hooks 3 of the first link portion 21 and the second link portion 22 are symmetrically arranged.

[0041] During the traction of impacted teeth, one end of the traction component 4 is connected to the hook 3 of the traction link 2, while the other end is fixed to the target impacted tooth. Specifically, the traction component 4 consists of a traction chain 41 and a suction cup 42. One end of the traction chain 41 is wrapped around and fixed to the traction link 2, while the other end is fitted with the suction cup 42, which is directly connected to the target impacted tooth. When the traction chain 41 is tensioned, the impacted tooth connected to the suction cup 42 will grow along the tension direction of the traction chain 41. This design ensures that the impacted tooth can be effectively pulled in the predetermined direction, thereby achieving the treatment goal. In this way, the traction component 4 not only provides stable fixation but also precisely controls the growth direction of the impacted tooth, providing a strong guarantee for the success of the treatment.

[0042] In some cases, impacted teeth may tilt, and this tilting direction often does not follow the extended line of the tooth arrangement, but rather presents a complex state with multiple different directions. Therefore, the design needs to be flexible enough to adapt to impacted teeth with various orientations to ensure effective traction. To achieve this goal, the system includes a first link 21 and a second link 22, which can be positioned on the cheek side and the lingual side, respectively. Hooks 3 are provided at the ends of the first link 21 and the second link 22 to fix one end of the traction member 4. The orientation of the first link 21 and the second link 22 can be adjusted according to the tilting direction of the impacted tooth, allowing the traction member 4 to adapt to different tooth positions.

[0043] Since the first connecting rod 21 and the second connecting rod 22 are located on opposite sides and work together to simultaneously fix the traction member 4, at least one hook 3 is always located distal to the impacted tooth, while the other hook 3 plays an auxiliary role, making the traction direction more stable. This design not only forms a traction force line passing through the center of the impacted tooth's resistance during traction, thus effectively ensuring a uniform distribution of traction force, but also enhances the traction effect on the impacted tooth, ensuring the stability and efficiency of the treatment process.

[0044] At the same time, refer to Figure 3 The first link portion 21 and the second link portion 22 shown have an arc. The arc of the first link portion 21 and the second link portion 22 increases first and then decreases from the connection point with the first belt loop 11, and matches the gums in the oral cavity.

[0045] Considering the slight inclination of the gums in the human oral cavity, the first connecting rod 21 and the second connecting rod 22 are designed with a corresponding curvature to better adapt to the patient's gum shape. Once the vertical molar fixation device is installed and secured, the first connecting rod 21 and the second connecting rod 22 will naturally lie above the patient's gums. The curvature design cleverly avoids direct contact with the gums, thus preventing potential interference. This adaptive design not only ensures a comfortable experience for the user when wearing the vertical molar fixation device, significantly reducing the foreign body sensation, but also further stabilizes the positioning of the first connecting rod 21 and the second connecting rod 22 by reducing the probability of contact between the gums and these connecting rods. This stable positioning is a key factor in ensuring the quality of impacted tooth traction, ensuring a smooth traction process and achieving the desired treatment effect. Through this series of meticulous designs, both the comfort of the device and the effectiveness of the treatment are enhanced.

[0046] Specifically, the curvature of the first connecting rod portion 21 and the second connecting rod portion 22 is greater than 0 and less than π / 6. When the curvature of the first connecting rod portion 21 and the second connecting rod portion 22 is too large, the space occupied by the first connecting rod portion 21 and the second connecting rod portion 22 in the vertical direction will also increase. By setting the curvature range to be greater than 0 and less than π / 6, contact between the first connecting rod portion 21, the second connecting rod portion 22 and the gum can be effectively avoided.

[0047] Third Implementation Method

[0048] In the second embodiment of this application, a vertical molar fixation device is proposed, which enhances the stability of the device after fixation by setting two fixing bands 1. However, in actual treatment, as the traction process of impacted teeth progresses, it is often necessary to adaptively adjust the traction direction to maintain the tension of the traction member 4. However, in some cases during the treatment process, the posture of the hook 3 may not meet the subsequent traction requirements, which requires setting up a new traction device, a process that may be cumbersome. To solve this problem, the device design should fully consider the flexible adjustment of the traction direction, and optimize the design of the hook 3 so that the posture can be quickly adjusted as needed during treatment, reducing unnecessary reset steps, thereby improving treatment efficiency and user experience.

[0049] In view of this, refer to Figure 1 , Figure 2The improvement of the third embodiment of this application compared to the second embodiment is that the hook 3 includes: a first vertical section 31, a first curved section 34, and a second vertical section 32. The first vertical section 31 is connected to the end of the traction link 2 away from the fixing ring 1, one end of the first curved section 34 is connected to the first vertical section 31, and the second vertical section 32 is connected to the end of the first curved section 34 away from the first vertical section 31. The first vertical section 31, the first curved section 34, and the second vertical section 32 form a first U-shaped hook.

[0050] A first U-shaped hook is formed by combining the first vertical segment 31, the first curved segment 34, and the second vertical segment 32. This design not only increases the overall size and space occupied by the hook but also provides more ample space for the traction member 4 to be wrapped and fixed. Simultaneously, the U-shaped hook 3 has the ability to be adjusted in shape according to the actual needs of the patient. Specifically, the distance between the first vertical segment 31 and the second vertical segment 32 can be increased by bending the first curved segment 34, thereby changing the posture of the traction member 4 after wrapping and fixing. This design can better adapt to the growth conditions of different impacted teeth, providing a more flexible traction solution. Through this adjustability, the device can more precisely adapt to individual patient differences, ensuring the smooth progress of the traction process and improving treatment outcomes. The overall design considers both functionality and human needs, providing a more flexible and effective option for the treatment of impacted teeth.

[0051] Further reference Figure 1 , Figure 2 As shown, the hook 3 also includes: a second curved section 35 and a third vertical section 33. One end of the second curved section 35 is connected to the second vertical section 32. The bending direction of the second curved section 35 is opposite to that of the first curved section 34. The third vertical section 33 is connected to the second curved section 35. The second vertical section 32, the second curved section 35 and the third vertical section 33 form a second U-shaped hook.

[0052] With the addition of the second curved section 35 and the third vertical section 33, the structure of the hook 3 evolves into two mutually centrally symmetrical U-shaped hooks. This design allows for adjustments to the curvature of the first curved section 34 and the second curved section 35 to change the opening size of the two U-shaped hooks, adapting to different hanging requirements. Furthermore, this design not only improves the fixation effect of the traction member 4 but also simplifies the doctor's operating procedure.

[0053] To ensure successful traction of impacted teeth, the traction member 4 needs to be securely wrapped around the hook 3 and kept under appropriate tension. The S-shaped hook design formed by two U-shaped hooks allows for double-layer wrapping, effectively preventing the traction member 4 from detaching from the hook 3. To further enhance the wrapping effect, the traction member 4 can be wrapped around the first vertical section 31 and the first curved section 34. After wrapping, external force is used to bring the first vertical section 31, the second vertical section 32, and the third vertical section 33 together, thus closing the opening of the U-shaped hook and significantly reducing the risk of separation between the traction member 4 and the hook 3 during traction.

[0054] Furthermore, the first bending segment 34 and the second bending segment 35 can change their bending arc under the action of external force, so as to change the opening size of the first U-shaped hook and the second U-shaped hook.

[0055] To ensure that the first U-shaped hook and the second U-shaped hook can be easily adjusted in shape, shape memory alloy materials can be used to make the first bending segment 34 and the second bending segment 35. For example, using nickel-titanium alloy to make these two bending segments not only gives the first bending segment 34 and the second bending segment 35 sufficient strength, but also makes their shape easy to change, thus better adapting to different usage scenarios.

[0056] By using shape memory alloys, especially nickel-titanium alloys, excellent shape memory properties can be provided while ensuring structural strength. This material can deform under stress but return to its preset shape after the external force is removed. This means that the first bending segment 34 and the second bending segment 35 can flexibly change their shape to adapt to different traction requirements and individual patient differences, whether through manual adjustment or the application of external force.

[0057] This design not only improves the adaptability and practicality of the device but also provides doctors with greater flexibility in actual operation, ensuring the safety and effectiveness of the traction process. Simultaneously, the use of shape memory alloys such as nickel-titanium alloys meets the material performance requirements of modern medical devices, guaranteeing both functional realization and long-term reliability and safety. Overall, this material selection strategy adds more innovative elements to the U-shaped hook design, enhancing its performance in practical applications.

[0058] In addition, the hook 3 has spaced winding positions to allow the pulling member 4 to engage with and wind around the hook. These winding positions on the hook 3 ensure that the pulling member 4 engages within them during winding, increasing the friction between the hook 3 and the pulling member 4. This also ensures that the pulling member 4 remains connected to the hook 3 throughout the process of pulling the impacted tooth, preventing separation between them.

[0059] Finally, the fixing device also includes: an elastic pad, evenly distributed on the inner sidewall of the inner ring of the fixing belt 1, with a matrix of protrusions distributed on the elastic pad.

[0060] During the wearing process, the fixation band 1 needs to be accurately fitted onto the patient's premolars. To ensure a secure connection between the fixation band 1 and the premolars, we have specially designed an elastic pad located on the inner side of the fixation band 1. This elastic pad effectively increases the friction between the fixation band 1 and the premolars and molars after wearing, thereby significantly improving the stability of the traction link 2 after fixation.

[0061] Furthermore, the addition of the elastic pad serves another important function. During traction, it avoids direct contact and potential abrasion with the outer surface of the premolars. This design not only protects the patient's premolars and molars from unnecessary damage but also extends the lifespan of the fixation band 1, ensuring the safety and comfort of the treatment process. In summary, by cleverly utilizing the elastic pad, we have not only improved the gripping force and traction stability of the fixation band 1 but also enhanced the device's protective effect on the patient's premolars. This design detail reflects our profound understanding of functionality and human-centered considerations in medical device design, aiming to provide patients with a higher quality and safer treatment experience.

[0062] Finally, it should be noted that those skilled in the art will understand that many technical details have been presented in the embodiments of this application to facilitate a better understanding of the present application. However, even without these technical details and various changes and modifications based on the above embodiments, the technical solutions claimed in the claims of this application can be substantially achieved. Therefore, in practical applications, various changes can be made to the above embodiments in form and detail without departing from the spirit and scope of this application.

Claims

1. A vertical molar fixing device, characterized in that, The fixing device includes: A fixing band (1) is matched with the target premolar, and the fixing band (1) is used to be sleeved on the premolar; The traction link (2) is connected at one end to the side wall of the outer peripheral surface of the fixed belt ring (1), and the other end of the traction link (2) extends away from the fixed belt ring (1). A hook (3) is provided at the end of the traction link (2) away from the fixed belt ring (1). The traction member (4) is detachably connected at one end to the hook (3) and at the other end to the target tooth; when the traction member (4) is tensioned, it pulls the target tooth.

2. The vertical molar fixing device according to claim 1, characterized in that, The fixing ring (1) includes: The first belt loop (11) is connected to the traction link (2); The second belt loop (12) is connected to the outer peripheral surface of the first belt loop (11) on the side away from the traction link (2); The first band (11) and the second band (12) are respectively fitted onto two adjacent premolars, and the second band (12) is smaller than the first band (11).

3. The vertical molar fixing device according to claim 2, characterized in that, The outer circumferential surface of the first belt ring (11) is provided with a plurality of mounting holes (111), which are matched with the traction link (2); The traction link (2) is inserted into different mounting holes (111) and fixed so that the traction link (2) forms different traction angles.

4. The vertical molar fixing device according to claim 3, characterized in that, The traction link (2) includes: The first connecting rod (21) has one end matched with the mounting hole (111) and connected to the first belt ring (11), and the other end of the first connecting rod (21) is provided with a hook (3); The second connecting rod (22) has one end matched with the mounting hole (111) and connected to the first belt ring (11), and the other end of the second connecting rod (22) is provided with a hook (3); The hook (3) of the first connecting rod part (21) and the hook (3) of the second connecting rod part (22) are arranged symmetrically to each other.

5. The vertical molar fixing device according to claim 4, characterized in that, The first connecting rod portion (21) and the second connecting rod portion (22) have an arc. The arc of the first connecting rod portion (21) and the second connecting rod portion (22) increases first and then decreases from the connection point with the first belt loop (11), and matches the gums in the oral cavity.

6. The vertical molar fixing device according to claim 4, characterized in that, The range of the arc values ​​of the first connecting rod part (21) and the second connecting rod part (22) is greater than 0 and less than π / 6.

7. The vertical molar fixing device according to claim 1, characterized in that, The hook (3) includes: The first vertical section (31) is connected to the end of the traction link (2) away from the fixed belt ring (1); The first curved section (34) has one end connected to the first vertical section (31); The second vertical segment (32) is connected to the end of the first curved segment (34) away from the first vertical segment (31); The first vertical segment (31), the first curved segment (34), and the second vertical segment (32) form a first U-shaped hook.

8. The vertical molar fixing device according to claim 7, characterized in that, The hook (3) also includes: The second curved section (35) has one end connected to the second vertical section (32), and the bending direction of the second curved section (35) is opposite to that of the first curved section (34). The third vertical segment (33) is connected to the second curved segment (35), and the second vertical segment (32), the second curved segment (35) and the third vertical segment (33) form a second U-shaped hook; The first curved section (34) and the second curved section (35) can change their curvature under the action of external force, so as to change the opening size of the first U-shaped hook and the second U-shaped hook.

9. The vertical molar fixing device according to claim 1, characterized in that, The hook (3) has winding positions distributed at intervals so that the pulling member (4) can be engaged in the winding positions and wound.

10. The vertical molar fixing device according to claim 1, characterized in that, The fixing device also includes: The elastic pads are evenly distributed on the inner sidewall of the inner ring of the fixed belt ring (1), and the elastic pads are distributed with protrusions arranged in a matrix.

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