利用游标卡尺测量青少年口腔模型100副,用直线回归方法进行统计学分析,建立了未萌双尖牙和尖牙牙冠宽度与同颌切牙牙冠宽度之和的直线回归方程。本方程与Moyers表预测的准确性无明显差异,但本方程所得的预测值更接近实测值,配合现有牙弓长度,可以方便地预测混合牙列期是否存在潜在的恒牙列拥挤。 100 oral adolescent models were measured by vernier calipers and analyzed by linear regression method. The linear regression equation was established for the sum of the widths of the non-adorable bicuspid and canine crowns and the maxillary coronal width of the maxillary incisors. The accuracy of this equation is not significantly different from that predicted by Moyers table. However, the predictive value obtained by this equation is closer to the measured value. With the existing length of dental arch, it is easy to predict whether there is potential crowding in the mixed dentition.