Fixed orthodontic device for distally moving molar

Abstract

The utility model discloses a fixed orthodontic device for distally moving molar teeth, which comprises an orthodontic arch wire and a plurality of brackets fixed on teeth, the brackets are respectively fixed on different teeth, the orthodontic arch wire sequentially penetrates through each bracket, the fixed orthodontic device further comprises a transverse palatal bar, at least one traction rubber chain and at least one micro-implant, at least one traction hook is arranged on the transverse palatal bar, one end of the traction rubber chain is clamped with the traction hook, the other end of the traction rubber chain is connected with the micro-implant, the transverse palatal bar is positioned on the upper jaw of an oral cavity, and two ends of the transverse palatal bar are respectively fixed on the inner sides of teeth at opposite positions. The micro-implant is mounted at a proper position of the palate. The micro-implant has the characteristics of simple structure and high aesthetic degree after correction.

Description

Technical Field

[0001] This utility model relates to the technical field of oral medical devices, and in particular to a fixed orthodontic device for distalizing molars. Background Technology

[0002] In conventional fixed orthodontic treatment, the usual methods for distalizing molars include extraoral orthodontic archwires + intraoral fixation devices or brackets + micro-implants (MIA) placed in the maxillary bilateral zygomatic alveolar ridges. The former requires patients to wear the extraoral archwires and headgear themselves, which is not comfortable and the effect depends on patient compliance. The latter has problems such as difficulty in implanting MIA when the patient's zygomatic alveolar ridge area is insufficient, or the implant is very easy to loosen and fall out after implantation, affecting the molar distalization effect, and the micro-implant colliding with the tooth root as the molar is distalized.

[0003] Therefore, based on the above-mentioned technical problems, this application proposes a fixed orthodontic device with high stability and wide applicability. Utility Model Content

[0004] The purpose of this invention is to overcome the shortcomings of the prior art and provide a fixed orthodontic device with high stability and wide applicability.

[0005] To achieve the above objectives, this utility model provides a fixed orthodontic device for distal molar retraction, comprising an orthodontic archwire and brackets fixed to the teeth. Multiple brackets are fixed to different teeth, and the archwire passes sequentially through each bracket. The device also includes a palatal bar, at least one traction rubber chain, and at least one micro-implant. The palatal bar is equipped with at least one traction hook. One end of the traction rubber chain is engaged with the traction hook, and the other end is connected to the micro-implant. The palatal bar is located on the upper palate, and its two ends are fixed to the inner surfaces of teeth at opposite positions. The micro-implant is installed at an appropriate position on the upper palate.

[0006] Furthermore, it also includes at least one push spring for relative pushing of the teeth.

[0007] Furthermore, at least one pair of said brackets are connected only by a push spring.

[0008] Furthermore, the push spring is sleeved on the orthodontic archwire between at least one pair of brackets.

[0009] Furthermore, a lingual sheath is provided between the end of the transpalatal bar and the inner side of the tooth.

[0010] Furthermore, there are two traction rubber chains, one end of which is engaged with traction hooks located on both sides of the U-shaped bend of the transverse palatine bar.

[0011] The present invention adopts the above-described solution, and its beneficial effects are as follows:

[0012] By applying force simultaneously on the labial and palatal sides, the molars can be moved distally, providing appropriate space for the correction of crowded or protruding teeth, thereby improving practicality.

[0013] By optimizing the installation location of the micro-implant, the installation difficulty of the micro-implant is relatively reduced, making it easier for patients with insufficient bone volume in the zygomatic alveolar ridge area to achieve stable installation and reducing installation requirements. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the fixed orthodontic device in this embodiment.

[0015] Among them, 11-first premolar, 12-first molar, 13-bracket, 2-orthodontic archwire, 3-palatal bar, 31-U-shaped bend, 32-traction hook, 4-traction rubber chain, 5-micro-implant, 6-push spring, 7-lingual sheath, 8-ligature wire. Detailed Implementation

[0016] To facilitate understanding of this utility model, a more complete description of it is provided below with reference to the accompanying drawings. The drawings illustrate preferred embodiments of the utility model. However, this utility model can be implemented in many different forms and is not limited to the embodiments described herein. These embodiments are provided to provide a more thorough and complete understanding of the disclosure of this utility model.

[0017] See appendix Figure 1 As shown, the relative directions (front and back) are explained. In this embodiment, a fixed orthodontic device for distal molar retraction includes an orthodontic archwire 2 and brackets 13 fixed on the teeth. There are multiple brackets 13, which are fixed on different teeth respectively. The orthodontic archwire 2 passes through each bracket 13 in sequence. Specifically, the six anterior teeth (i.e., the canines on both sides and the teeth between the canines) are generally tied together in a figure-eight manner with ligature wires 8, thereby relatively balancing the forward orthodontic force of the orthodontic archwire 2 and avoiding the situation where the entire row of teeth protrudes excessively forward (buck teeth), thereby enhancing the anchorage of the anterior teeth and ensuring the aesthetics after correction.

[0018] In this embodiment, the device also includes a transpalatal bar 3, at least one traction rubber chain 4, and at least one micro-implant 5. The transpalatal bar 3 is provided with at least one traction hook 32. One end of the traction rubber chain 4 is engaged with the traction hook 32, and the other end of the traction rubber chain 4 is connected to the micro-implant 5. The transpalatal bar 3 is located on the upper palate of the oral cavity, and the two ends of the transpalatal bar 3 are respectively fixed to the inner side of the teeth at opposite positions. A lingual sheath 7 is provided between the end of the transpalatal bar 3 and the inner side of the teeth. The micro-implant 5 (MIA) is installed at an appropriate position on the upper palate.

[0019] Specifically, by setting up a transpalatal bar 3 (TPA), the maxillary molars on both sides are connected as one unit, thereby enabling the maxillary molars to move distally synchronously. Secondly, the end of the transpalatal bar 3 is inserted into the lingual sheath 7, and the lingual sheath 7 is welded to the palatal side of the first molars 12 on both sides for relative fixation. By adjusting the angle at which the end of the transpalatal bar 3 is inserted into the lingual sheath 7, torque control of the first molars 12 is achieved, preventing the first molars 12 from tilting buccally during distalization (posterior). At the same time, by setting up the lingual sheath 7, the length of the transpalatal bar can be adjusted according to the actual change in the width of the dental arch after the molars are distalized (posterior), thereby ensuring that the transpalatal bar can be stably installed in the palate. In addition, the transpalatal bar 3 also has a depressor effect, which can prevent the molars from elongating and the palatal cusp from drooping during distalization (posterior), thereby enhancing vertical control during the orthodontic process.

[0020] See appendix Figure 1 As shown, in this embodiment, there are two traction rubber chains 4 (the micro-implant 5 is preferably located on the palatal mucosa distal to the transpalatal bar 3). One end of each traction rubber chain 4 is engaged with the traction hooks 32 located on both sides of the U-shaped bend 31 of the transpalatal bar 3. The traction rubber chains 4 are set in an inclined manner.

[0021] See appendix Figure 1 As shown, in this embodiment, at least one, preferably two, pairs of push springs 6 are also included for pushing the teeth relative to each other. At least one, preferably two, pairs of brackets 13 arranged opposite to each other on the first premolar 11 and the first molar 12 are connected only by push springs 6. Through the elastic potential energy of push springs 6, the above-mentioned six anterior teeth ligation and the cooperation between transpalatal bar 3, the forward force of the orthodontic archwire 2 is balanced, thereby ensuring the aesthetics of the entire row of teeth after correction.

[0022] Example 2: In this example 2, the difference from example 1 is that the push spring 6 is sleeved on at least one pair, preferably two pairs, of orthodontic archwires 2 between the brackets 13 of the first premolar 11 and the first molar 12.

[0023] The embodiments described above are merely preferred embodiments of this utility model and are not intended to limit the utility model in any way. Any modifications or alterations made by those skilled in the art to the technical solution of this utility model without departing from its scope are equivalent embodiments of this utility model. Therefore, all equivalent changes made based on the concept of this utility model without departing from its scope should be covered within the protection scope of this utility model.

Claims

1. A fixed orthodontic device for distal molar retraction, comprising an archwire (2) and brackets (13) fixed to the teeth, wherein there are multiple brackets (13) and each bracket is fixed to a different tooth, and the archwire (2) passes through each bracket (13) in sequence, characterized in that: It also includes a palatal bar (3), at least one traction rubber chain (4) and at least one micro-implant (5). The palatal bar (3) is provided with at least one traction hook (32). One end of the traction rubber chain (4) is engaged with the traction hook (32), and the other end of the traction rubber chain (4) is connected to the micro-implant (5). The palatal bar (3) is located on the upper palate of the oral cavity, and the two ends of the palatal bar (3) are respectively fixed on the inner side of the teeth at opposite positions. The micro-implant (5) is installed in an appropriate position on the upper palate.

2. The fixed orthodontic device for distal molar retraction according to claim 1, characterized in that: It also includes at least one push spring (6) for use with relative pushing teeth.

3. A fixed orthodontic device for distal molar retraction according to claim 2, characterized in that: At least one pair of said brackets (13) are connected only by push springs (6).

4. A fixed orthodontic device for distal molar retraction according to claim 2, characterized in that: The push spring (6) is fitted onto the straightening bowwire (2) between at least one pair of brackets (13).

5. A fixed orthodontic device for distal molar retraction according to claim 1, characterized in that: The end of the transpalatal bar (3) is provided with a lingual sheath (7) between the end and the inside of the teeth.

6. A fixed orthodontic device for distal molar retraction according to claim 1, characterized in that: The number of the traction rubber chains (4) is two, and one end of each of the two traction rubber chains (4) is engaged with the traction hooks (32) on both sides of the U-shaped bend (31) of the transverse palatine bar (3).

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