Mesial tipping occurred in all teeth except the upper second molars, the lower central incisors, and the lower lateral incisors.

• 测量牙冠舌侧近远心倾斜与颊舌侧斜角度，结果显示，上颚除第二大臼齿以外，其他牙齿皆为近心倾斜，最大近心倾斜为犬齿。