A pre-molar dismounting pendulum appliance

Abstract

The utility model relates to the field of pendulum appliance, disclose a kind of exempt from premolar disassembly pendulum appliance, including base plate, base plate is connected with pendulum spring and front section steel wire, pendulum spring and first molar are connected, further include bracket, bracket is set in premolar palatine side, and front section steel wire is detachably connected in bracket.Including first steel wire and second steel wire, bracket includes first bracket and second bracket, first bracket and second bracket are respectively set in first premolar palatine side and second premolar palatine side, and first steel wire and second steel wire are respectively detachably connected in first bracket and second bracket.In order to realize the modularization of the retention unit and the force unit of pendulum appliance, separable connection.

Description

Technical Field

[0001] This utility model relates to the field of pendulum orthodontic appliances, specifically to a pendulum orthodontic appliance that does not require removal of premolars. Background Technology

[0002] Pendulum appliances are commonly used in orthodontic treatment to move molars distally. They utilize the mechanical effect of springs or coil springs to move the maxillary first molar distally, providing alignment space for the anterior teeth. Traditional pendulum appliances typically consist of a retention unit in the premolar region (such as a resin base, band, or adhesive pad) and a distally extending force arm (such as a pendulum spring, or pendulum spring). Traditional pendulum appliances use a monolithic adhesive design in the premolar region, typically bonded to the occlusal surface of the teeth. Each application of force requires complete removal of the appliance, which presents the following problems: 1. Cumbersome operation and low clinical efficiency: Direct intraoral force application is ineffective for some patients, requiring complete removal of the entire appliance from the mouth at each follow-up visit, a complex procedure. Each removal and re-adhesion process takes an average of 15–20 minutes, significantly increasing the physician's chairside time and workload. Furthermore, the procedure is highly dependent on the physician's manual skills, leading to inconsistent operation.

[0003] 2. Material waste and interface damage risk: Repeated bonding-removal cycles increase the consumption of bonding resin, which not only drives up treatment costs but also easily leaves bonding agent residue on the tooth surface, increasing the difficulty of subsequent cleaning. More seriously, long-term or frequent bonding operations may damage the enamel surface of premolars, increasing the risk of microcracks and affecting tooth health.

[0004] 3. Patient experience and burden of follow-up visits: Due to the above issues, patients have to go through the removal process every time they visit, resulting in poor treatment comfort, which can easily lead to anxiety and resistance, and challenge compliance.

[0005] 4. An integral bonding design is used in the premolar area. After the first tooth is moved distally into place, the orthodontic appliance must be completely removed first, and a new impression must be taken to make a Nance bracket to maintain the position of the distally moved molar. Utility Model Content

[0006] The present invention aims to provide a pendulum orthodontic appliance that eliminates the need for premolar removal, thereby enabling modular and separable connection of the retention unit and the force application unit.

[0007] To achieve the above objectives, the present invention adopts the following technical solution: a pendulum orthodontic appliance that does not require the removal of premolars, comprising a base, on which a pendulum spring and a front wire are connected, the pendulum spring being connected to the first molar, characterized in that: it further comprises a bracket, the bracket being disposed on the palatal side of the premolar, and the front wire being detachably connected to the bracket.

[0008] The beneficial effects of this plan are: 1. Traditional pendulum orthotics have a highly integrated structure and function between the "force application unit" and the "base," failing to achieve modular separation. Once the retention part (base) is bonded, it forms a single unit with the force application part (spring arm) that cannot be easily separated in clinical practice. This rigid, integrated design is the fundamental reason why adjusting the force application requires complete removal, reflecting the shortcomings of existing technology in terms of maintainability and user experience.

[0009] Brackets are typically placed on the labial or buccal side of the teeth as force application points in orthodontic treatment. This innovative approach places brackets on the palatal side of the premolars to connect with the pendulum appliance, serving as a fixation point and maintaining the stability of the retention unit. This achieves a modular and separable connection between the base and the force application unit.

[0010] 2. Allows physicians to easily adjust, replace, or increase the force of the booster unit without removing the baseplate.

[0011] 3. Minimize clinical operation time, reduce material consumption, avoid damage to tooth tissue, and maintain the continuity of orthodontic force.

[0012] Furthermore, the front wire includes a first wire and a second wire, and the bracket includes a first bracket and a second bracket. The first bracket and the second bracket are respectively located on the palatal side of the first premolar and the palatal side of the second premolar. The first wire and the second wire are detachably connected to the first bracket and the second bracket, respectively.

[0013] This configuration makes full use of the two first and second premolars for fixing the base.

[0014] Furthermore, both the first and second steel wires are L-shaped, and one end of each wire is connected to the base. In this design, the L-shape refers to the steel wire being bent at an angle less than or equal to 135°.

[0015] Furthermore, both the first and second steel wires extend distally from the base.

[0016] Furthermore, the end of the first steel wire is bent towards the cheek to form a small loop, the diameter of which is smaller than the thickness of the bracket.

[0017] Brackets typically use self-locking brackets, which rely on their self-locking function to clamp the first and second steel wires, but also allow for some slippage when the external force is too great. If the physician prefers the ends of the first and second steel wires to extend distally, small loops are set at the ends so that in extreme cases the first and second steel wires can slide relative to the bracket. The small loops and the self-locking brackets make contact and limit the sliding, thereby preventing further slippage and maintaining the force application effect.

[0018] Furthermore, both the first and second steel wires extend towards the midline from the end furthest from the base.

[0019] With this setup, during the correction process, the reaction force of the pendulum spring will push the first and second steel wires closer to the center. In extreme cases, the first and second steel wires will slide relative to the bracket. The bending position of the first and second steel wires and the contact limit with the bracket will prevent further sliding and maintain the force application effect.

[0020] Furthermore, the first steel wire extends distally to the center at the end furthest from the base, while the second steel wire extends proximally to the center at the end furthest from the base.

[0021] With this configuration, the first and second steel wires are set in opposite directions and work together. The bends of the first and second steel wires respectively contact and limit the position of the bracket, further restricting the position of the base and preventing the base from shifting due to chewing, teeth grinding, etc., thereby avoiding uneven force on the left and right sides of the oral cavity and affecting the treatment effect.

[0022] Furthermore, it includes a band that fits over the first molar. The palatal side of the band and the pendulum spring are detachably connected, and the buccal side of the band has a buccal tube that serves as a connection point for other orthodontic structures. During treatment, the band remains on the first molar, and the buccal tube on the band can serve as a connection point for other orthodontic structures. Even when the pendulum spring is removed, the effect of other orthodontic structures is not affected, thus ensuring a continuous and uninterrupted effect for better orthodontic results.

[0023] Once the first tooth has been moved distally into place, unlike existing technologies where the orthodontic appliance needs to be completely removed and a new impression taken to create a Nance brace to maintain the position of the distally moved molar, only the base and self-ligating brackets need to be removed. The buccal tube can be used to achieve alignment and distal movement of the premolars, whereas existing technologies do not have a buccal tube and therefore cannot achieve this effect.

[0024] Furthermore, the bracket is a self-locking bracket, making it easier and faster to secure the steel wire. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of Example 1; Figure 2 This is a schematic diagram of Example 2; Figure 3 This is a schematic diagram of Example 3. Detailed Implementation

[0026] The following detailed description illustrates the specific implementation method: The reference numerals in the accompanying drawings include: base 1, first steel wire 21, second steel wire 22, first bracket 23, second bracket 24, pendulum spring 31, belt ring 32, cheek tube 33, sheath tube 34, first molar 4, first premolar 5, and second premolar 6.

[0027] Example 1 Example 1 is basically as follows Figure 1 The image shows a pendulum orthodontic appliance that allows for the removal of premolars. It includes a resin base 1, on which two pendulum springs 31, two first steel wires 21, and two second steel wires 22 are cast and connected. The pendulum springs 31, first steel wires 21, and second steel wires 22 are respectively located on both sides of the base 1. Both the first steel wires 21 and the second steel wires 22 are 0.018-inch Australian wires, illustrated by lines.

[0028] The treatment target in this embodiment is the first molar 4. The labial adjacent to the first molar 4 is the second premolar 6, and the adjacent to the second premolar 6 is the first premolar 5. The palatal side of the first premolar 5 and the palatal side of the second premolar 6 are respectively attached to the first bracket 23 and the second bracket 24. The first bracket 23 and the second bracket 24 are both self-ligating brackets. In this embodiment, the self-ligating bracket is a 0.022-inch groove. The self-ligating bracket is a structure commonly used in existing orthodontics for bonding with archwires and has a self-ligating function.

[0029] Both the first steel wire 21 and the second steel wire 22 are L-shaped. One end of the first steel wire 21 and the second steel wire 22 are connected to the base 1, and the other end is bent and extended in the opposite direction, and is locked in the first bracket 23 and the second bracket 24 respectively.

[0030] It also includes a band 32, which is fitted onto the first molar 4. A sheath 34 is welded to the palatal side of the band 32. One end of the pendulum spring 31 is connected to the base 1, and the other end is bent and extends distally to pass through the sheath 34. A buccal tube 33 is welded to the buccal side of the band 32. The buccal tube 33 is used as a connection point for other orthodontic structures.

[0031] In this embodiment, the pendulum spring 31, the ring 32, and the sheath 34 are a molar force-applying module, which applies a thrust to the first molar 4. The four brackets are premolar retention modules, which remain in the patient's mouth permanently as connecting fasteners. The first steel wire 21 and the second steel wire 22 are connecting modules, which are used to connect the molar force application module and the premolar retention module.

[0032] The following is a method for using a pendulum orthodontic appliance that allows for the removal of premolars: 1. First, metal self-ligating brackets are bonded to the palatal side of both premolars, with the brackets positioned 3mm from the gingival margin. 2. Then, take an impression, bend the wire according to the existing palatal metal bracket position, and take an impression to make a personalized pendulum orthodontic appliance that does not require the removal of premolars; 3. The ring 32 is bonded to the first molar 4 with adhesive, the first steel wire 21 and the second steel wire 22 are locked into the self-locking bracket respectively, and the pendulum spring 31 is inserted into the sheath 34 of the ring 32 after applying force; 4. Applying force: a. Open the self-ligating bracket cover, remove the first wire 21 and the second wire 22 in the premolar area, and remove a pendulum orthodontic appliance that does not require premolar removal; b. Adjust the length of the pendulum spring 31; c. Reinsert the first wire 21 and the second wire 22 into the self-locking bracket and close the sliding cover.

[0033] After the initial bonding, force is applied every 4 weeks, with each molar distalized by 0.5 mm. After 6 months of force application, the first wire 21, the second wire 22, and the bracket are removed, leaving the band 32 and the base 1 as retainers. Stage II orthodontic treatment can then be performed, using the buccal tube 33 on the buccal side of the maxillary first molar 4 for anterior tooth retraction.

[0034] Example 2 The difference between Example 2 and Example 1 is as follows: Figure 2 As shown, the first steel wire 21 extends distally to the center at the end furthest from the base 1, and the second steel wire extends proximally to the center at the end furthest from the base 1.

[0035] Example 3 The difference between Example 3 and Example 1 is as follows: Figure 3 As shown, the first steel wire 21 and the second steel wire 22 both extend towards the center from the end away from the base 1.

[0036] Example 4 The difference between Example 4 and Example 1 is that the end of the first steel wire 21 is bent toward the cheek to form a small loop, and the diameter of the small loop is smaller than the thickness of the bracket.

[0037] The above descriptions are merely embodiments of this utility model. Commonly known technical solutions and / or characteristics are not described in detail here. It should be noted that those skilled in the art can make various modifications and improvements without departing from the technical solution of this utility model. These modifications and improvements should also be considered within the scope of protection of this utility model, and will not affect the effectiveness of the implementation of this utility model or the practicality of the patent. The scope of protection claimed in this application should be determined by the content of its claims, and the specific embodiments described in the specification can be used to interpret the content of the claims.

Claims

1. A pendulum orthodontic appliance that allows for the removal of premolars, comprising a base, a pendulum spring and a front wire connected to the base, the pendulum spring being connected to the first molar, characterized in that: It also includes brackets, which are placed on the palatal side of the premolars, with the front wire detachably connected inside the brackets.

2. The pendulum orthodontic appliance for removing premolars according to claim 1, characterized in that: The front wire includes a first wire and a second wire, and the bracket includes a first bracket and a second bracket. The first bracket and the second bracket are respectively located on the palatal side of the first premolar and the palatal side of the second premolar. The first wire and the second wire are detachably connected to the first bracket and the second bracket, respectively.

3. The pendulum orthodontic appliance for removing premolars according to claim 2, characterized in that: Both the first and second steel wires are L-shaped, and one end of each wire is connected to the base.

4. The pendulum orthodontic appliance for removing premolars according to claim 3, characterized in that: Both the first and second steel wires extend far into the middle from the end furthest from the base.

5. A pendulum orthodontic appliance for removing premolars according to claim 4, characterized in that: The end of the first wire is bent toward the cheek to form a small loop, the diameter of which is smaller than the thickness of the bracket.

6. A pendulum orthodontic appliance for removing premolars according to claim 3, characterized in that: Both the first and second steel wires extend towards the center from the end furthest from the base.

7. A pendulum orthodontic appliance for removing premolars according to claim 3, characterized in that: The first steel wire extends distally towards the center from the end furthest from the base, while the second steel wire extends proximally towards the center from the end furthest from the base.

8. A pendulum orthodontic appliance for removing premolars according to claim 1, characterized in that: It also includes a band that fits over the first molar. The palatal side of the band and the pendulum spring are detachably connected. The buccal side of the band has a buccal tube, which serves as a connection point for other orthodontic structures.

9. A pendulum orthodontic appliance for removing premolars according to claim 1, characterized in that: The bracket is a self-locking bracket.

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