Mandibular premolar residual root traction device

Abstract

The invention provides an underjaw premolar teeth residual root traction device, and relates to the field of orthodontic instruments. The device uses first molar teeth and second molar teeth at the same side as anchorage teeth and comprises two platy bottom plates, a steel wire, a buccal tube, an Niti wire, a thrust spring and a tongue side button; two opposite side surfaces of the platy bottom plates are connected by the steel wire; the buccal tube is arranged on the steel wire; an included angle between the side wall, parallel with the bottom plates, of the inner wall of the cavity of the buccal tube and a sagittal surface is 30-45 degrees; an included angle between the side wall vertical to the bottom plates and a crown-shaped surface is 45-90 degrees; the inlet end of the buccal tube faces an occlusion direction and the outlet end faces a root direction; one end of the Niti wire is connected with the tongue side button, the other end of the Niti wire penetrates through the buccal tube and is bent backwards, the thrust spring sleeves outside the Niti wire between the inlet end of the buccal tube and the tongue side button, the Niti wire is in a stretching state; the thrust spring is in a compressed state. The traction device can provide continuous correction force, effectively draws a residual root to the occlusion direction and is favorable for the recovery treatment of a post crown.

Description

Technical field [0001] The invention relates to the field of orthodontic appliances, in particular to a traction device for the residual root of a mandibular premolar. Background technique [0002] In oral clinics, there are more residual roots of mandibular premolars caused by large-scale caries. For cases with long roots, you can choose to traction the residual roots when they meet the restoration conditions (dentin shoulder collar, biological width ) Later, post crown repair treatment. In the prior art, the residual roots of mandibular premolars are often drawn with micro-implant nails combined with auxiliary arches. Although the correction force is relatively continuous, micro-implant nails are traumatic treatments. Once they fall off, they require a second operation and the patient suffers more pain; Adhesive brackets in adjacent teeth are used with Niti wire to gradually increase the force, but the consistency of the orthodontic force is poor and the traction effect is not...

AI Technical Summary

Problems solved by technology

In the prior art, the residual root of the mandibular premolar is often tracted with micro-implantation screws and auxiliary arches. Although the correction force is relatively continuous, the micro-implantation screws are traumatic treatments. Adjacent teeth are bonded to the bracket and Niti wire is used to gradually increase the force, but the orthodontic force is not sustainable and the traction effect is not ideal

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