An orthodontic device for simultaneous control of vertical mandibular molar and molar elongation

Abstract

This utility model discloses an orthodontic device for vertically controlling mandibular molar elongation, relating to the field of orthodontic equipment technology. It includes: a first lever arm whose free end applies a distal gingival vertical force to the target molar under the torque generated by a first torque element; a second torque element that causes a third and fourth lever arm to move away from each other, resulting in the third lever arm generating a distal occlusal corrective force that is transmitted to the second lever arm and then acts on the target molar; a sixth lever arm whose end is away from the third torque element is semi-fixed to the second lever arm, and the torque generated by the third torque element provides a distal gingival corrective force to the sixth lever arm to counteract the occlusal elongation force in the distal occlusal corrective force transmitted from the third lever arm to the second lever arm. This orthodontic device for vertically controlling mandibular molar elongation solves the problem of molar elongation caused by existing vertical molar methods, shortens the treatment cycle, reduces treatment costs, and achieves ideal orthodontic results.

Description

Technical Field

[0001] This utility model relates to the field of orthodontic equipment technology, and in particular to an orthodontic device that verticalizes the mandibular molars while controlling the elongation of the molars. Background Technology

[0002] Orthodontics is dedicated to the comprehensive research and treatment of malocclusion. Malocclusion is caused by genetic and environmental factors and encompasses various deformities of the teeth, jawbone, and craniofacial region. It not only affects normal oral function but also negatively impacts facial aesthetics.

[0003] In clinical practice, some mandibular molars exhibit mesial tilting, often caused by factors such as premature loss of deciduous teeth, prolonged absence of permanent teeth, or abnormal tooth eruption. This disrupts the normal occlusal relationship and affects oral function and aesthetics. Currently, there are various methods and devices for verticalizing molars, such as T-shaped bending, distal implant placement to pull the teeth vertical, NITI square wire alignment, and segmental arch combined with micro-implant anchorage for vertically tilted molars.

[0004] T-shaped bends: Made of stainless steel square wire bent into a "T" shape, the vertical part provides force, and the horizontal part is used for connection. They are mainly used to close gaps, depress, raise, and straighten teeth. When verticalizing molars, they apply a distal thrust through elastic deformation.

[0005] Distal implantation of molars for vertical traction: The implant is a small, cylindrical titanium implant that is surgically inserted into the alveolar bone as an anchorage point, providing stable traction to straighten tilted molars. It is suitable for orthodontic treatment with a large range of movement.

[0006] NITI square wire alignment: The archwire is made of nickel-titanium alloy, which has good elasticity, memory and fatigue resistance. It has a square cross section and uses its properties to apply a gentle and continuous orthodontic force to align the teeth vertically.

[0007] Segmented archwire combined with micro-implant anchorage for upright tilted molars: Segmented archwires divide orthodontic wires to achieve precise local tooth control, while micro-implants provide stable anchorage. The combination of the two uprights the molars and avoids adverse effects on other teeth.

[0008] However, existing technologies have significant shortcomings. T-shaped curved molar alignment is inefficient and consumes a significant amount of clinical chair time; distal molar implant anchorage requires highly skilled and risky procedures, easily stimulating soft tissue hyperplasia and leading to a high failure rate; NITI (Non-Invasive Implant Therapy) requires full-mouth bracket archwire treatment, making it difficult to meet local orthodontic needs. Furthermore, all of the above methods can cause mandibular molar elongation. While traditional segmental archwire techniques can locally correct molar elongation, the placement of micro-implants can lead to molar elongation, increasing the mandibular plane angle, mandibular rotation, and occlusal trauma, thus prolonging the treatment period and increasing costs. Utility Model Content

[0009] The purpose of this invention is to provide an orthodontic device that verticalizes the mandibular molars while controlling their elongation, in order to solve the problem of molar elongation caused by vertical molar methods in the prior art, shorten the treatment cycle, reduce treatment costs, and achieve ideal orthodontic results.

[0010] To achieve the above objectives, this utility model provides the following solution:

[0011] This utility model provides an orthodontic device for verticalizing mandibular molars while simultaneously controlling molar elongation, comprising: a first force-applying part, a second force-applying part, a fixing part, and a third force-applying part integrally connected; the fixing part is detachably connected to the apical region of the premolar; the first force-applying part includes a first lever arm, a first torque member, and a second lever arm, the first lever arm and the second lever arm being integrally connected to the torque point of the first torque member, the free end of the first lever arm being used for a semi-fixed connection to a fixing connector of the target molar, and applying a distal gingival vertical force to the target molar under the torque generated by the first torque member; the second force-applying part includes a third lever arm, a second torque member, and a fourth lever arm, the third lever arm and the fourth lever arm being integrally connected to the torque point of the second torque member, the third lever arm and the second lever arm... The fourth lever arm is integrally connected to the fixed part. The torque generated by the second torque member causes the third lever arm and the fourth lever arm to move away from each other, so that the third lever arm generates a distal occlusal corrective force and transmits it to the second lever arm, thereby acting on the target molar. The third force-applying part includes a fifth lever arm, a third torque member, and a sixth lever arm. The fifth lever arm and the sixth lever arm are integrally connected to the torque point of the third torque member. The fifth lever arm is integrally connected to the fixed part. The end of the sixth lever arm away from the third torque member is used for semi-fixed connection to the second lever arm. The torque generated by the third torque member provides a distal gingival corrective force to the sixth lever arm and acts on the second lever arm to counteract the occlusal elongation force in the distal occlusal corrective force transmitted from the third lever arm to the second lever arm.

[0012] Preferably, it further includes a pressure-lowering hook, which includes an integrally connected straight segment and a semi-circular segment. The end of the straight segment away from the semi-circular segment is used for integral connection with the sixth lever arm, and the semi-circular segment is used for circumferential connection with the second lever arm.

[0013] Preferably, the first torque member and / or the second torque member and / or the third torque member are annular loops comprising at least one annular ring.

[0014] Preferably, it also includes an anchorage, which is used for implantation in the root region of the premolar, and the fixation is connected to the anchorage by a ligature wire.

[0015] Preferably, the anchorage is a micro-implant anchorage nail.

[0016] Preferably, the first force-applying part, the second force-applying part, the fixing part, the third force-applying part, and the pressure-reducing hook are made of orthogonal stainless steel wire.

[0017] Preferably, the orthodontic stainless steel wire has a square cross-section, the fixing connector for the target molar is a buccal tube, the buccal tube has a square hole matching the orthodontic stainless steel wire, and the free end of the first lever arm is inserted into the square hole.

[0018] Preferably, the angle between the first lever arm and the second lever arm after the reverse force is applied is an obtuse angle.

[0019] Preferably, the angle between the third lever arm and the fourth lever arm is 180°.

[0020] Preferably, the angle between the fifth lever arm and the sixth lever arm is less than or equal to 90°.

[0021] The present invention achieves the following technical advantages over the prior art:

[0022] This invention provides an orthodontic device that verticalizes the mandibular molars while controlling molar elongation. The detachable connection of the fixing part allows for flexible installation and adjustment based on the patient's oral condition, facilitating clinical operation and providing a stable support position for the device, thus aiding in the subsequent force application structure's smooth application of force to the target molars. The first force application part precisely applies a vertical force in a specific direction (distal gingival direction) to the target molars, helping to gradually verticalize the tilted target molars, improving their position, and thereby optimizing the occlusal relationship between the molars and adjacent and opposing teeth. The second force application part provides a distal occlusal corrective force to the target molars, working in conjunction with the first force application part to apply force to the target molars, promoting positional adjustment and improving treatment effectiveness. This structure of the third force application part effectively counteracts the elongation force that may be caused by the second force application part, precisely controlling the vertical positional changes of the molars while adjusting them vertically and distally, avoiding a series of adverse oral problems caused by molar elongation, and comprehensively improving the accuracy and treatment effect of orthodontic treatment. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0024] Figure 1 A schematic diagram of the orthodontic device for simultaneously controlling the elongation of the mandibular molars provided by this utility model;

[0025] Figure 2 A schematic diagram of the corrective force during use of the orthodontic device for simultaneously controlling the elongation of the mandibular molars provided by this utility model;

[0026] In the diagram: 100. Orthodontic device for vertically controlling mandibular molar elongation; 1. First force application unit; 2. Second force application unit; 3. Third force application unit; 4. Depressing force application hook; 5. Fixing unit; 10. First torque element; 11. First lever arm; 12. Second lever arm; 20. Second torque element; 21. Third lever arm; 22. Fourth lever arm; 30. Third torque element; 31. Fifth lever arm; 32. Sixth lever arm; TAD, micro-implant anchorage screw; 6. Target molar. Detailed Implementation

[0027] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0028] The purpose of this invention is to provide an orthodontic device that verticalizes the mandibular molars while controlling their elongation, in order to solve the problem of molar elongation caused by vertical molar methods in the prior art, shorten the treatment cycle, reduce treatment costs, and achieve ideal orthodontic results.

[0029] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0030] This invention provides an orthodontic device that verticalizes the mandibular molars while simultaneously controlling molar elongation, such as... Figures 1-2 As shown, it includes: a first force-applying part 1, a second force-applying part 2, a fixing part 5, and a third force-applying part 3 integrally connected; the fixing part 5 is detachably connected to the root region of the premolar; the first force-applying part 1 includes a first lever arm 11, a first torque member 10, and a second lever arm 12, the first lever arm 11 and the second lever arm 12 being integrally connected to both ends of the first torque member 10, the free end of the first lever arm 11 being used as a fixing connector for semi-fixed connection to the target molar, and applying a vertical force in the distal gingival direction (e.g., under the action of the torque generated by the first torque member 10) to the target molar. Figure 2(F1 in the text); The second force-applying part 2 includes a third force arm 21, a second torque member 20, and a fourth force arm 22. The third force arm 21 and the fourth force arm 22 are integrally connected to both ends of the second torque member 20. The third force arm 21 is integrally connected to the second force arm 12, and the fourth force arm 22 is integrally connected to the fixing part 5. The torque generated by the second torque member 20 causes the third force arm 21 and the fourth force arm 22 to move away from each other, so that the third force arm 21 generates a distal occlusal orthodontic force (such as...). Figure 2 The force (F2) is transmitted to the second lever arm 12, and then acts on the target molar; the third force application part 3 includes a fifth lever arm 31, a third torque member 30, and a sixth lever arm 32. The fifth lever arm 31 and the sixth lever arm 32 are integrally connected to both ends of the third torque member 30. The fifth lever arm 31 is integrally connected to the fixation part 5. The end of the sixth lever arm 32 away from the third torque member 30 is used for semi-fixed connection to the second lever arm 12. The torque generated by the third torque provides the sixth lever arm 32 with a distal gingival orthodontic force (such as F2) to the sixth lever arm 32. Figure 2 The force applied to the second lever arm 12 (F3) counteracts the occlusal elongation force transmitted from the third lever arm 21 to the second lever arm 12 in the distal occlusal orthodontic direction. The detachable connection of the fixing part 5 allows for flexible installation and adjustment of the orthodontic appliance according to the patient's oral condition, facilitating clinical operation and providing a stable support position for the appliance, which helps subsequent force-applying structures to apply force smoothly to the target molar. The first force-applying part 1 can precisely apply a vertical force in a specific direction (distal gingival direction) to the target molar, helping to gradually straighten the tilted target molar, improve its position, and thus optimize the occlusal relationship between the molar and adjacent teeth and opposing teeth. The second force-applying part 2 provides a distal occlusal orthodontic force to the target molar, working in conjunction with the first force-applying part 1 to apply force to the target molar, promoting positional adjustment and improving the orthodontic effect. This structure of the third force application section 3 can effectively counteract the elongation force of the molars that may be caused by the second force application section 2. While adjusting the target molars in the vertical and distal directions, it can precisely control the positional changes of the molars in the vertical direction, avoid a series of adverse oral problems caused by molar elongation, and comprehensively improve the accuracy and treatment effect of orthodontic treatment.

[0031] In a preferred embodiment, the system further includes a depressor hook 4, which comprises an integrally connected straight segment and a semi-circular segment. The end of the straight segment away from the semi-circular segment is integrally connected to the sixth lever arm 32, and the semi-circular segment is used for circumferential connection to the second lever arm 12. The depressor hook 4 works in conjunction with other force-applying structures to further enhance the control over molar elongation. Its unique shape and connection method help to better adjust the direction and magnitude of the force applied to the target molar throughout the orthodontic process, ensuring that the molar maintains an appropriate height during vertical alignment and optimizing the orthodontic effect.

[0032] In a preferred embodiment, the first torque member 10 and / or the second torque member 20 and / or the third torque member 30 are annular loops comprising at least one ring. The annular loop design increases the elasticity and deformation capacity of the torque member, enabling more precise control and adjustment of the magnitude and direction of the generated torque. With this structure, the orthodontic appliance can more flexibly apply appropriate force to the target molars according to the specific condition of the patient's teeth and the needs of orthodontic treatment, improving the personalization and effectiveness of treatment.

[0033] In a preferred embodiment, the device further includes anchorage for implantation in the apical region of the premolar. The fixation unit 5 is connected to the anchorage via ligature wires. The anchorage provides a stable support point and reaction force basis for the entire orthodontic device. By connecting the fixation unit 5 to the anchorage, the overall structure of the device remains stable when force is applied to the target molar, making the force application process smoother and more accurate, effectively improving the efficiency of orthodontic force transmission and treatment results.

[0034] In a preferred embodiment, the anchorage is a micro-implant anchorage screw (TAD). The TAD, as anchorage, possesses good stability and biocompatibility. It can provide strong and stable anchorage within a small space, facilitating precise control of tooth movement. It is particularly suitable for cases requiring greater orthodontic force or high precision, thus improving the effectiveness and success rate of orthodontic treatment.

[0035] In a preferred embodiment, the first force-applying part 1, the second force-applying part 2, the fixing part 5, the third force-applying part 3, and the depressing force-applying hook 4 are orthodontic stainless steel wires. Orthodontic stainless steel wires possess good strength and elasticity, enabling them to deform appropriately according to the patient's oral cavity condition while ensuring the stability of the device structure, thereby generating and transmitting the required orthodontic force. Their excellent material properties help maintain the shape and force application effect of the orthodontic device over a long period, ensuring the stability and reliability of the orthodontic process.

[0036] In a preferred embodiment, the orthodontic stainless steel wire has a square cross-section, and the fixed connector for the target molar is a buccal tube. The buccal tube has a square hole that matches the orthodontic stainless steel wire. The free end of the first lever arm 11 is inserted into the square hole. The matching design of the square cross-section stainless steel wire and the square hole makes the connection between the first lever arm 11 and the buccal tube more stable, which can effectively transmit the orthodontic force and better control the direction of force application, reduce force dispersion and loss, and improve orthodontic efficiency and accuracy.

[0037] In a preferred embodiment, the angle between the first lever arm 11 and the second lever arm 12 after the reverse force is applied is an obtuse angle. This obtuse angle design allows the first lever arm 11 and the second lever arm 12 to work synergistically at a specific angle, generating a resultant force direction that is more favorable for the verticality of the target molar. This obtuse angle can optimize the distribution and transmission of force according to orthodontic needs, enhance the vertical effect on the target molar, and improve the effectiveness of orthodontic treatment.

[0038] In a preferred embodiment, the angle between the third lever arm 21 and the fourth lever arm 22 is 180°. This 180° angle ensures that the third lever arm 21 and the fourth lever arm 22 are linearly opposite each other. When the second torque member 20 generates torque, this structure allows for a more direct and stable transmission of force between the third lever arm 21 and the fourth lever arm 22. This enables more effective conversion of the torque generated by the second torque member 20 into power that generates the distal occlusal orthodontic force on the third lever arm 21, and stable and efficient transmission to the second lever arm 12, thereby accurately acting on the target molar. This helps enhance the application effect of the distal occlusal orthodontic force on the target molar, improving the stability and accuracy of the orthodontic treatment.

[0039] In a preferred embodiment, the angle between the fifth lever arm 31 and the sixth lever arm 32 is less than or equal to 90°. The magnitude and direction of the distal gingival force applied to the target molar can be flexibly adjusted according to the actual oral condition and orthodontic needs of different patients. This angle setting allows for better precise control of multi-directional forces on the target molar, enhances the inhibition of molar elongation, and comprehensively improves the orthodontic function and treatment effect of the orthodontic appliance.

[0040] This utility model uses specific examples to illustrate its principles and implementation methods. The above description of the embodiments is only for the purpose of helping to understand the method and core idea of ​​this utility model. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the idea of ​​this utility model. In summary, the content of this specification should not be construed as a limitation of this utility model.

Claims

1. An orthodontic device for verticalizing mandibular molars while simultaneously controlling molar elongation, characterized in that: include: The first force-applying part (1), the second force-applying part (2), the fixing part (5), and the third force-applying part (3) are integrally connected; The fixing part (5) is detachably connected to the root region of the premolar; The first force-applying part (1) includes a first lever arm (11), a first torque member (10), and a second lever arm (12). One end of the first lever arm (11) and the second lever arm (12) are integrally connected to the torque point of the first torque member (10). The free end of the first lever arm (11) is used for a semi-fixed connection to the fixed connector of the target molar, and a vertical force in the distal gingival direction is applied to the target molar under the action of the torque generated by the first torque member (10). The second force-applying part (2) includes a third force arm (21), a second torque member (20), and a fourth force arm (22). One end of the third force arm (21) and the fourth force arm (22) are integrally connected to the torque point of the second torque member (20). The other end of the third force arm (21) is integrally connected to the second force arm (12). The other end of the fourth force arm (22) is integrally connected to one end of the fixing part (5). The torque generated by the second torque member (20) causes the third force arm (21) and the fourth force arm (22) to move away from each other, so that the third force arm (21) generates a distal maxillary orthodontic force and transmits it to the second force arm (12), thereby acting on the target molar. The third force-applying part (3) includes a fifth lever arm (31), a third torque member (30), and a sixth lever arm (32). One end of the fifth lever arm (31) and the sixth lever arm (32) are integrally connected to the torque point of the third torque member (30). The other end of the fifth lever arm (31) is integrally connected to the other end of the fixing part (5). The end of the sixth lever arm (32) away from the third torque member (30) is used for semi-fixed connection of the second lever arm (12). The torque generated by the third torque member (30) provides the sixth lever arm (32) with a distal gingival correction force and acts on the second lever arm (12) to counteract the gnathic elongation force in the distal gnathic correction force transmitted from the third lever arm (21) to the second lever arm (12).

2. The orthodontic device for vertically controlling mandibular molar elongation according to claim 1, characterized in that: It also includes a pressure-lowering hook (4), which includes an integrally connected straight section and a semi-circular section. The end of the straight section away from the semi-circular section is used to be integrally connected with the sixth lever arm (32), and the semi-circular section is used to be circumferentially connected to the second lever arm (12).

3. The orthodontic device for vertically controlling mandibular molar elongation according to claim 2, characterized in that: The first torque member (10) and / or the second torque member (20) and / or the third torque member (30) are annular loops including at least one ring.

4. The orthodontic device for verticalizing mandibular molars and simultaneously controlling molar elongation according to claim 3, characterized in that: It also includes an anchorage for implantation in the root region of the premolar, and the fixation part (5) is connected to the anchorage by a ligature wire.

5. The orthodontic device for vertically controlling mandibular molar elongation according to claim 4, characterized in that: The anchorage is a micro-implant anchorage nail (TAD).

6. The orthodontic device for verticalizing mandibular molars and simultaneously controlling molar elongation according to claim 5, characterized in that: The first force-applying part (1), the second force-applying part (2), the fixing part (5), the third force-applying part (3) and the pressure-reducing hook (4) are made of orthogonal stainless steel wire.

7. The orthodontic device for verticalizing mandibular molars and simultaneously controlling molar elongation according to claim 6, characterized in that: The cross-section of the orthodontic stainless steel wire is square, the fixing connector of the target molar is a buccal tube, and the buccal tube is provided with a square hole that matches the orthodontic stainless steel wire. The free end of the first lever arm (11) is inserted into the square hole.

8. The orthodontic device for vertically controlling mandibular molar elongation according to claim 7, characterized in that: The angle between the first lever arm (11) and the second lever arm (12) after being subjected to a reverse force is an obtuse angle.

9. The orthodontic device for vertically controlling mandibular molar elongation according to claim 8, characterized in that: The angle between the third lever arm (21) and the fourth lever arm (22) is 180°.

10. The orthodontic device for simultaneously controlling the elongation of mandibular molars according to claim 9, characterized in that: The angle between the fifth lever arm (31) and the sixth lever arm (32) is less than or equal to 90°.

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