A Bracketless Invisible Appliance for Correcting Jaw Protrusion

Abstract

The invention relates to an invisible bracketless appliance for correcting protruding premaxilla. The invisible braketless appliance comprises an appliance body, a traction hook connected onto the appliance body, an elastomer and an anchorage piece, and is characterized in that the traction hood comprises a pillar connected onto the appliance body, and a triangular plate arranged on the pillar, and the elastomer comprises a spring and a triangular sleeve connected onto one end of the spring; the shape of a hole of the triangular sleeve is the same as that of the triangular plate, and the hole of the triangular sleeve is larger than the triangular plate; the hole of the triangular sleeve and the triangular plate are staggered in a traction treatment state. Compared with the prior art, the invisible bracketless appliance provided by invention has the advantages that the elasticity is not changed in the use process, the operation is easy, the size of elasticity is easily mastered, and the elastomeris not easily damaged and does not easily come off from the traction hook.

Description

Technical field: [0001] The invention relates to a medical device. Background technique: [0002] The clinical manifestations of bimaxillary protrusion malocclusion are open lips and teeth, the long axis inclination of the upper and lower teeth is large, the nasolabial is laborious and unnatural, the middle 1 / 3 of the face protrudes forward, and the chin is small, which seriously affects the patient's facial features. According to reports, the incidence of bony bimaxillary protrusion in the Chinese population is significantly higher than that of Caucasians and Japanese. For patients with maxillary protrusion and dental arch protrusion, satisfactory results can be obtained through orthodontic treatment. The purpose of bimaxillary protrusion treatment is to maximally retract the upper and lower anterior teeth and alveolar process, thereby indirectly changing the soft tissue. face shape. Therefore, in the process of adduction of the anterior teeth or the overall distal moveme...

AI Technical Summary

Problems solved by technology

As disclosed in patent 201520688306.0, the attachment on the conventional invisible aligner uses a traction hook, and the elastic body uses a rubber band. Since the rubber band will creep during use, the elastic force will initially become smaller, thereby affecting the effect of traction. , Moreover, the rubber band is easy to be worn and broken. If the traction hook is used, the rubber band must cross the hook head. First, it is not easy to make the rubber band hook on the hook head. The elastic force is different, therefore, it is not easy to grasp the elastic force, and third, since the elastic band is only constrained in one direction, the elastic band is easy to fall off from the hook head

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