Accessory

Abstract

The invention discloses an accessory, and belongs to the technical field of orthodontics. The accessory is used for adhering to the surface of a tooth, and is matched with transparent orthodontic apparatus installed on the tooth, the transparent orthodontic apparatus is used to accommodate the accessory and apply an acting force to the accessory, the accessory comprises a connecting surface and four recessed portions, wherein the connecting surface is arranged at one end of the accessory, the connecting surface adheres to the tooth, the four recessed portions are arranged on the peripheral surface of the accessory at intervals, the acting force is decomposed on the recessed portions, component forces on the recessed portions act on the tooth, and thereby each recessed portion can make thetooth move in three-dimensional directions. According to the accessory of the invention, the force of the transparent orthodontic apparatus acting on the accessory is decomposed through the four recessed portions, the recessed portions can make the tooth move in three-dimensional directions, the applicability to different deformed teeth is improved, and the correction effect is improved. At the same time, the component forces on the recessed portions act on the tooth, the force couple is reduced, the tilt movement of the tooth is reduced, and the correction effect is further improved.

Description

technical field [0001] The invention relates to the technical field of orthodontics, in particular to an accessory. Background technique [0002] In the process of invisible orthodontics, accessories are generally needed to assist the movement of teeth. In the prior art, the following three attachments are usually used: [0003] Such as figure 1 As shown, the first type of attachment 200 is a rectangular attachment. When the tooth 100 needs to move horizontally, the rectangular attachment can apply force in the horizontal direction, but because the point of force application is far away from the impedance center, it will generate a force couple on the tooth 100, while the rectangular attachment There is no anti-force couple control, so that the tooth 100 will move obliquely during the horizontal movement, but translation cannot be achieved. [0004] Such as figure 2 As shown, the second type of attachment 300 is a double semicircle root control attachment. When the toot...

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Problems solved by technology

[0003] like figure 1 As shown, the first type of attachment 200 is a rectangular attachment. When the tooth 100 needs to move horizontally, the rectangular attachment can apply force in the horizontal direction, but because the point of force application is far away from the impedance center, it will generate a force couple on the tooth 100, while the rectangular attachment There is no anti-couple control, so that the teeth will move obliquely during the horizontal movement of the tooth 100, and cannot be translated

[0004] like figure 2 As shown, the second type of attachment 300 is a double semicircle root control attachment. When the tooth 100 moves horizontally, the double semicircle root control attachment exerts force on both sides, and the double semicircle root control attachment will generate two opposite force couples on the tooth 100. Well, it is better to align the teeth 100 and control the roots of the teeth 100; b

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