Methods: 66 adult patients who had finished orthodontic treatment with SWA and non-extracted were selected. 33 cases treated with FBP.They were matched to the other 33 cases with age and gender.

• 方法：随机选择66例经过直丝弓矫治的成年非拔牙患者，其中33例配合使用平面导板治疗。