A device for pushing molars backward

Abstract

A device for pushing molars backwards, the invention relates to the technical field of medical instruments; the lower end of a traction hook is fixed on the upper surface of a retaining ring, a square groove is provided inside the retaining ring, a connecting rod is fixed on the lower end of a rear side wall of the retaining ring, the connecting rod is composed of a No. 1 cross bar, a No. 2 cross bar and an arc-shaped rod, the front end of the No. 1 cross bar is fixed on the rear side wall of the retaining ring, the rear end of the No. 1 cross bar is provided with an arc-shaped rod, the rear end of the arc-shaped rod is provided with a No. 2 cross bar, the No. 2 cross bar, the arc-shaped rod and the No. 1 cross bar are an integrated structure, the retaining ring is sleeved on the main arch wire, and conflicts with a circular tube with a ring on the molar, the force pushing the molar to move distally is adjusted by adjusting the length of the connecting rod, and the molar is driven to move backwards by the circular tube with a ring, thereby solving the problems of large volume, poor comfort, and unfavorable factors of distal inclination of the crown in the existing device for pushing molars backwards, and poor stable correction effect. The invention has the advantages of reasonable arrangement and low manufacturing cost.

Description

Technical Field

[0001] The invention relates to the technical field of medical instruments, and in particular to a device for pushing molars backwards. Background Art

[0002] In orthodontic clinical practice, the incidence of Class II malocclusion is relatively high, and it is one of the important types of malocclusion in orthodontic treatment. This type of patient is often accompanied by crowded dentition, and is generally treated clinically by tooth extraction or pushing the molars backwards. For patients who have lost their deciduous molars prematurely and have their permanent molars mesialized, pushing the molars backwards is a commonly used correction method. Its advantage is that it maintains the natural physiological state of the oral and maxillofacial system and is conducive to the stability of the occlusal relationship. For patients with good facial shape and mild crowding, pushing the molars backwards can provide space to solve the crowding of the anterior teeth, or slightly retract the anterior teeth. However, the existing molar-pushing devices need to rely on the patient's compliance, and lack traction devices. The crowns are tilted distally and cannot achieve the overall backward effect of the molars. The aesthetics and comfort are extremely poor and need to be improved urgently. Summary of the invention

[0003] The purpose of the present invention is to provide a molar-pushing backward device with a reasonable design and easy use in view of the defects and shortcomings of the prior art. The retaining ring is mounted on the main arch wire and contacts the circular tube with a ring on the molar. The force pushing the molar to move distally is adjusted by adjusting the length of the connecting rod, and the molar is driven to move backward by the circular tube with a ring, thereby solving the problems of large size, poor comfort, distal inclination of the crown, and poor stable correction effect in the existing molar-pushing backward device.

[0004] To achieve the above-mentioned purpose, the technical solution adopted by the present invention is: it includes a towing hook, a retaining ring and a connecting rod, the lower end of the towing hook is fixed on the upper surface of the retaining ring, a square groove is opened inside the retaining ring, a connecting rod is fixed on the lower end of the rear side wall of the retaining ring, and the connecting rod is composed of a No. 1 cross bar, a No. 2 cross bar and an arc-shaped rod, the front end of the No. 1 cross bar is fixed on the rear side wall of the retaining ring, the rear end of the No. 1 cross bar is provided with an arc-shaped rod, and the rear end of the arc-shaped rod is provided with a No. 2 cross bar, and the No. 2 cross bar, the arc-shaped rod and the No. 1 cross bar are an integrated structure.

[0005] Furthermore, an archwire inlet is provided on the left side wall of the retaining ring.

[0006] Furthermore, the width of the square groove is 0.022 inches and the height is 0.028 inches.

[0007] After adopting the above structure, the beneficial effects of the present invention are as follows: the device for pushing molars backwards described in the present invention, the retaining ring is sleeved on the main arch wire, and conflicts with the circular tube with a ring on the molar. The force for pushing the molars to move distally is adjusted by adjusting the length of the connecting rod, and the molars are driven to move backwards by the circular tube with a ring, thereby solving the problems of large size, poor comfort, and distal inclination of the crown in the existing device for pushing molars backwards, and poor stable correction effect. The present invention has the advantages of reasonable setting and low production cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] Figure 1 It is a schematic diagram of the structure of the present invention.

[0009] Figure 2 It is a side view of the present invention.

[0010] Figure 3 It is the installation schematic diagram of the present invention.

[0011] Description of reference numerals:

[0012] Traction hook 1, retaining ring 2, square groove 2-1, connecting rod 3, cross bar No. 1 3-1, cross bar No. 2 3-2, arc rod 3-3, arch wire inlet 4, main arch wire 5, fixing groove 6, rubber band 7, fixing block 8. DETAILED DESCRIPTION

[0013] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0014] like Figure 1-Figure 3 As shown, this specific embodiment adopts the following technical scheme: it includes a traction hook 1, a retaining ring 2 and a connecting rod 3, the lower end of the traction hook 1 is welded and fixed on the upper surface of the retaining ring 2, a square groove 2-1 is opened inside the retaining ring 2, and an arch wire inlet 4 is opened on the left side wall of the retaining ring 2, which can facilitate the retaining ring 2 to be put on the main arch wire 5, and a connecting rod 3 is welded and fixed on the lower end of the rear side wall of the retaining ring 2, and the connecting rod 3 is composed of a No. 1 cross bar 3-1, a No. 2 cross bar 3-2 and an arc rod 3-3, the front end of the No. 1 cross bar 3-1 is welded and fixed on the rear side wall of the retaining ring 2, the rear end of the No. 1 cross bar 3-1 is provided with an arc rod 3-3, the rear end of the arc rod 3-3 is provided with a No. 2 cross bar 3-2, and the No. 2 cross bar 3-2, the arc rod 3-3 and the No. 1 cross bar 3-1 are integrally formed.

[0015] Furthermore, the width D of the square groove 2 - 1 is 0.022 inches, and the height H thereof is 0.028 inches.

[0016] The working principle of this specific embodiment is as follows: when in use, the archwire inlet 4 on the retaining ring 2 is put onto the main archwire 5, and it conflicts with the ring tube on the molar, then the rear end of the No. 2 crossbar 3-2 is inserted into the fixing groove 6 on the posterior teeth, and the traction hook 1 is hung on the rubber belt 7. The rear end of the rubber belt 7 is fixed to the gums through the fixing block 8. When adjustment is needed, it is only necessary to adjust the distance between the lower ends of the arc rods 3-3, thereby driving the No. 1 crossbar 3-1 to move in the direction of the No. 2 crossbar 3-2, thereby driving the bracket to move through the retaining ring 2, thereby achieving the effect of adjusting the teeth.

[0017] After adopting the above structure, the beneficial effects of this specific implementation are as follows:

[0018] 1. The retaining ring 2 is sleeved on the main arch wire 5 and conflicts with the circular tube with a ring on the molar. The force pushing the molar to move far is adjusted by adjusting the length of the connecting rod 3. The molar is driven to move backward by the circular tube with a ring, thereby solving the problems of large volume, poor comfort, and distal inclination of the crown in the existing device for pushing the molar backward, and poor stable correction effect;

[0019] 2. An archwire inlet 4 is provided on the left side wall of the retaining ring 2, so as to facilitate the device to be put on the main archwire 5;

[0020] Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A device for pushing molars backwards, characterized in that: It comprises a traction hook (1), a retaining ring (2) and a connecting rod (3), wherein the lower end of the traction hook (1) is fixed on the upper surface of the retaining ring (2), a square groove (2-1) is provided inside the retaining ring (2), and a connecting rod (3) is fixed on the lower end of the rear side wall of the retaining ring (2), and the connecting rod (3) is composed of a first cross bar (3-1), a second cross bar (3-2) and an arc-shaped rod (3-3), the front end of the first cross bar (3-1) is fixed on the rear side wall of the retaining ring (2), the rear end of the first cross bar (3-1) is provided with an arc-shaped rod (3-3), the rear end of the arc-shaped rod (3-3) is provided with a second cross bar (3-2), and the second cross bar (3-2), the arc-shaped rod (3-3) and the first cross bar (3-1) are an integrated structure; An arch wire inlet (4) is provided on the left side wall of the retaining ring (2), and the main arch wire (5) enters the retaining ring (2) through the arch wire inlet (4); The width of the square groove (2-1) is 0.022 inches and the height is 0.028 inches; When in use, the retaining ring (2) is put onto the main arch wire (5) and contacts the ring tube on the molar, then the rear end of the second cross bar (3-2) is inserted into the fixing groove (6) on the rear teeth, the traction hook (1) is hung on the rubber band (7), and the rear end of the rubber band (7) is fixed on the gums through the fixing block (8). When adjustment is required, it is only necessary to adjust the distance between the lower ends of the arc rods (3-3), thereby driving the first cross bar (3-1) to move in the direction of the second cross bar (3-2), thereby driving the bracket to move through the retaining ring (2), thereby achieving the effect of adjusting the teeth.

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