使用螺旋弹簧移动正畸的牙齿已有多年,对移动特定牙齿所需最合适的力量有不少研究。但对于螺旋弹簧在口内产生矫治力方面的实验研究则很少。通常介绍使用螺旋弹簧时是,直接拉长原螺旋弹簧长度的1/3～1/2,但没有谈及所产生的力的大小。本文目的是通过研究确定螺旋弹簧产生的力的大小,以帮助临床医师对移动牙齿时适当选用。有些论文谈及对特定牙齿移动时所需的力量,Storey等报告,150～200克力是拉 It has been many years since helical springs have been used to move orthodontic teeth and there have been many studies on the most appropriate forces needed to move a particular tooth. However, there are few experimental studies on the coercive force of coil springs in the mouth. The general introduction of the use of helical springs is the direct elongation of the original length of the helical spring 1/3 ~ 1/2, but did not talk about the size of the force generated. The purpose of this paper is to determine the size of the force generated by the coil spring, to help clinicians choose the right move teeth. Some papers talk about the force needed to move a particular tooth, and Storey et al. Report that 150 to 200 grams of force are pulled