关键词: 转矩, 夹装式门形辅弓, 固定正畸矫治器

Abstract:

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.

Key words: torque, crimpable gate spring, fixed appliance