Dental functional appliance

Abstract

A dental functional appliance comprises a base and a bracket body. The upper side and the lower side of the bracket body are respectively provided with a pair of ligation wings, and the middle of the bracket body is internally provided with a transverse arch wire slot. The dental functional appliance also comprises an E-shaped locking sheet made of a flexible material, the length of the locking sheet is more than that of the ligation wing, the side arms of the locking sheet are respectively arranged on the downside ligation wings of the bracket body in a penetrating way, the two downside ligation wings are respectively provided with a guide slot which allows the side arms of the locking sheet to penetrate through to slide therein, and the middle arm of the locking sheet is in a T shape, and is located between the ligation wings. The bracket body is provided with a first occulting bar and a second occulting bar which are contacted with he middle arm, the first occulting bar is close tothe transverse arch wire slot, the second transverse arch wire slot is far away from the transverse arch wire slot, the section of the first occulting bar is in an arc shape, the section of the second occulting bar is in a right angle triangle, a vertical surface of the second occulting bar face to the transverse arch wire slot, the length of the upright end of the middle arm of the locking sheetis equal to the distance from the lower edge of the downside ligation wings to the upper edge of the first occulting bar. The invention has simple structure, good handfeel and small foreign body sensation in the oral cavity of a patient.

Description

technical field [0001] The invention relates to a dental appliance. technical background [0002] In the 1960s, Andrews studied 120 normal joints without orthodontic treatment, and proposed six normal joint standards. On this basis, a series of brackets and buccal tubes for straight wire appliance were designed in the early 1970s. The new appliance is derived from the square wire arch appliance, but it eliminates the need to bend the first, second, and third sequences on the archwire. A straight archwire with a basic arch shape can be inserted into the bracket to complete The teeth move in three directions; at the end of the treatment, the finished arch wire is completely straight, so it is called a Straight Wire Appliance (SWA for short). Straight wire appliance is also called preset appliance (Preadjusted Appliance). This appliance uses brackets to position teeth and seldom bends archwires. The back-and-forth movement of the teeth caused by the error makes the positioni...

AI Technical Summary

Problems solved by technology

[0004] In order to overcome the disadvantages of the prior art, such as cumbersome operation, high requirements for doctors’ operation skills, and strong foreign body sensation in the patient’s mouth, the present invention provides a dental appliance with simple operation, good hand feeling, and little foreign body sensation in the patient’s oral cavity

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