口外力远中移动磨牙的作用已被广泛接受，但它的缺点是需要患者的配合。因为这一原因及不拔牙矫治趋势的上升，许多研究都转向发展新的口内远中移动磨牙技术，如使用镍钛螺簧与互斥磁铁。已有研究表明镍钛螺责与互斥磁铁都能有效地远中移动磨牙，本研究的目的是比较这两种远中 The role of molars moving away from the external force has been widely accepted, but its disadvantage is the need for patient cooperation. Because of this and the trend toward non-extraction treatment, many studies have turned to the development of new molars for molars, such as nickel-titanium coil springs and mutex magnets. It has been shown that NiTi screwed magnets and mutex magnets can effectively move molars away from each other. The purpose of this study is to compare the two far