Objective :In this study , regression equations (prediction equations) were established for the purpose of accurately predicting the mesiodistal widths of the crowns of unerupted lateral incisors .

• 目的：建立在混合牙列早期预测恒侧切牙牙冠及恒侧切牙至第二前磨牙冠宽和的回归方程。