“2×4”矫治器是指在替牙期前牙反患者上下恒磨牙上粘着带环 ,4个恒切牙上粘着方丝弓托槽 ,使用多用唇弓矫治前牙反的一种固定矫治方法 [1]。近年来临床上此固定矫治方法运用于正畸较多 ,为探讨“2×4”矫治器与传统颏兜矫治器在阻断替牙期前牙反中的作用异同 ,笔者对临 “2 × 4” orthodontic appliance refers to the patient in the period before the molar teeth on the upper and lower permanent molars with adhesive ring, four permanent incisors on the square arch brackets, the use of multi-purpose lip appliance for the correction of anterior crossbite Fixed correction method [1]. In recent years, clinical practice of orthodontics more fixed correction methods, in order to explore the “2 × 4” appliance and the traditional chinchill appliance in blocking the periodontal anterior crossbite in the role of similarities and differences, the author of Pro