关键词: 自锁托槽, 摩擦力, 转矩, 扩弓

Abstract: brackets, self?ligating brackets have lower frictional resistance and can provide persistent low force. Meanwhile, they help with better torque control, pain alleviation, chair time reduction, fewer visits and better periodontal health. However, self?ligating brackets have a problem that they are not in favor of correcting rotation and they have no obvious in terms of arch expansion. Based on clinical applica? tion and the authors?? experience, this article presents the advantages, limitations and development trend of self?ligating brackets, in or? der to provide reference for its clinical application.

Key words: self-ligating brackets, frictional force, torque, arch expansion