One-piece molar-back-pushing device

A one-piece, connecting body technology, used in dentistry, orthodontics, prosthetics, etc., can solve the problems of molar buccal tilt, limit movement, etc., to enhance stability, improve comfort, and facilitate clinical application. Effect

Pending Publication Date: 2020-08-14
PEKING UNIV SCHOOL OF STOMATOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In traditional methods, such as extraoral arches and class II traction, the effect of molar distalization largely depends on the patient's cooperation. In contrast, the use of microscrews to assist molar pushback has high patient comfort and absolute control over the molars. However, in use, there are still problems such as molar buccal inclination, and the amount of movement is limited by the position of the microscrew implantation.

Method used

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  • One-piece molar-back-pushing device
  • One-piece molar-back-pushing device
  • One-piece molar-back-pushing device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0052] figure 1 A schematic structural view of the one-piece retromolar device of this embodiment is shown; figure 2 A schematic structural view of the one-piece retromolar device of this embodiment is shown.

[0053] Such as figure 1 , figure 2 As shown, the one-piece pushback molar device includes:

[0054]A pair of retainers 1 are respectively fixed on the crown-palatal sides of the premolars 8, first molars 9 and second molars 10 on both sides of the oral cavity by resin adhesive. The palatal side of the crowns of the molars, first molars, and second molars, whose shape matches the corresponding crowns and does not affect the occlusion with the opposing jaw, has a thickness of 0.4mm; the connector 2 is a round rod with a diameter of 1.5mm, and its two ends They are respectively connected to the proximal ends of a pair of retainers 1, the radian of the connecting body 2 fits the palate, and the distance between the connecting body 2 and the palatal mucosa is 2mm; the ...

Embodiment 2

[0061] image 3 A schematic structural view of the one-piece retromolar device of this embodiment is shown; Figure 4 A schematic structural view of the one-piece retromolar device of this embodiment is shown.

[0062] Such as image 3 , Figure 4 As shown, the difference between the present embodiment and the first embodiment is that there are two microscrews 5 , and they are respectively located between the palatal apex of the first molar 9 and the second molar 10 on both sides of the palate. For some patients with high-arched palatal cover, using the microscrew 5 in the palatal suture to move the molars away may bring about the effect of molar depression, so you can choose to insert between the apices of the first molar 9 and the second molar 10 on both sides. The microscrew 5 achieves a better mechanical effect on the remote movement of the molars.

[0063] When designing, fit the retainer 1 on the palatal side of the molar crown of the patient, and design the connecti...

Embodiment 3

[0067] Figure 5 A schematic structural view of the one-piece retromolar device of this embodiment is shown.

[0068] Such as Figure 5 As shown, the difference between the present embodiment and the first embodiment is that the connector 6 is a nickel-titanium extension spring.

[0069] The one-piece push-back molar device of this program, the corresponding retainer and connector are individually designed according to the patient's dental arch data, and the retainer, connector, lateral traction hook and forward traction hook are integrated through 3D printing technology Molding; fix the retainer on the palatal side of the maxillary posterior teeth with resin adhesive, use a chain ring or nickel-titanium tension spring to connect the front traction hook or the side traction hook to the microscrew anchorage of the palate according to clinical needs. Molars move away.

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Abstract

The invention discloses a one-piece molar-back-pushing device. The device comprises: a pair of retention pieces, wherein a pair of the retention pieces is separately fixed at the palate side of dentalcrowns of molars at the two side of the oral cavity; a connecting body which is arranged between a pair of the retention pieces in a connection mode; traction hooks, wherein a plurality of the traction hooks comprise front traction hooks and side traction hooks, the front traction hooks are arranged on the connecting body, and the side traction hooks are respectively arranged on the retention pieces; at least one micro screw which is fixed at the palate part of the oral cavity and is positioned at the far middle side of the connecting body; and at least one connecting piece, wherein each connecting piece is arranged between one micro screw and one traction hook in a connection mode. The one-piece molar-back-pushing device is simple in structure and convenient to use, can push back molarsas far as possible within the physiological limit, can effectively overcome the defects of lip inclination of anterior teeth, cheek inclination of posterior teeth, tooth rotation and the like, and reduces the implantation number of micro screws.

Description

technical field [0001] The invention belongs to the technical field of orthodontics, and more specifically relates to a one-piece pushback molar device. Background technique [0002] Distal pushing of molars is a commonly used orthodontic treatment method in clinical orthodontics. It has a good treatment effect on Angle’s Class II patients with mild to moderate crowding, and can change the borderline cases between tooth extraction and non-extraction into non-extraction range, making the correction process easier. In traditional methods, such as extraoral arches and class II traction, the effect of molar distalization largely depends on the patient's cooperation. In contrast, the use of microscrews to assist molar pushback has high patient comfort and absolute control over the molars. However, in use, there are still problems such as molar buccal inclination and limited movement due to the position of microscrew implantation. [0003] Therefore, it is expected to develop a ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61C7/00A61C7/08
CPCA61C7/00A61C7/08
Inventor 韩冰宋广瀛卫彦陈贵吕汶諠余婷婷张云帆彭丽颖
Owner PEKING UNIV SCHOOL OF STOMATOLOGY
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