导弓矫治器的改良与应用姜世同导弓矫治器是最常用的功能性矫治器之一［１］，并兼有机械性矫治器的性能。主要用于前牙反或前后牙均反，且下颌可后退至切对切的安氏Ⅲ类错患者的矫治。笔者在临床使用中发现一些问题，如导弓易造成下前牙舌倾及导弓水平段压迫下前牙唇侧牙... The improvement and application of guide bow appliance JIANG Shi with guide bow appliance is one of the most commonly used functional appliance [1], and both mechanical appliance performance. Mainly for the anterior or posterior teeth anti-tooth both before and after, and the mandible can be retreated to cut the right Angle Class III malocclusion correction. I found some problems in clinical use, such as guide bow easy to cause the lower part of the tongue and the bow before the level of bow pressure oppression of the anterior teeth lips side ...