本研究对一组错牙模型临床冠轴倾角（ｔｉｐ）进行测量，并与各种流派直丝弓矫治器（ＳＷＡ）托槽轴倾角进行比较分析。结果说明了在牙齿排齐过程中，前牙是否唇倾主要取决于错病例牙齿自身的临床冠轴倾角，而与直丝弓矫治器托槽轴倾角的设计无直接关系 In this study, we measured the clinical crown inclinations of a group of malocclusion brachial plexus models and compared them with the tilt angle of brackets of various genital straight wire appliances (SWA). The results show that whether the anterior lip is lip-depressed or not depends mainly on the clinical crown angle of the tooth in the wrong tooth, and is not directly related to the design of the straight shaft appliance bracket axis inclination