新型正畸转矩簧夹装式门形辅弓及其临床应用

Clinical application of a novel torque control auxiliary:crimpable gate spring

转矩控制对正畸疗效尤为重要,然而传统的转矩控制方法有时无法获得理想的效果。本文介绍一种新型的成品夹装式门形辅弓,利用其独特的力学原理与结构设计,用于高效、便捷地改正目标牙转矩。夹装式门形辅弓由不锈钢圆丝弯制的U形曲与2个固位金属夹组成,根据U形曲高度分为6和8 mm 2种型号。夹闭金属夹将门形辅弓固定于主弓丝后,通过弯曲U形曲呈一定角度即可加力,U形曲位于主弓丝龈方或切方分别施加根舌向或根唇向转矩,弯曲角度越大则加力越大。通常加力2~3个月目标牙转矩即可发生明显改变。

Torque control is critical for orthodontic treatment.However,current torque control approaches are still unsatisfactory.This article aims to introduce crimpable gate spring,a novel,customizable torquing auxiliary that comprises a U loop and two crimpable clips.According to the height of the U loop,the spring has two types:6 and 8 mm.The large arm of the force contributes to its high efficiency for torque control,and crimpable clips facilitate easy repair.Force is applied by bending the U loop at a certain angle;the force is substantial when the bending angle is large.Lingual and labial root torques are produced by placing the U loop in the gingival and incisal directions,respectively.The torque of the target tooth can generally be changed two to three months after force application.