对照中性包括正常与Ⅰ类的错同远中(包括Ⅱ类1分类与2分类错),探索以颅面测量为基础的分类与型的相关性及型间最佳判别的测量指标。共有85例未经正畸治疗的生长期儿童在5岁、10岁、15岁所摄X线侧位头影测量片作纵向研究。定16点,引出17个线、 Control neutral , including normal  and Ⅰ misdiagnosis 远 far   (including Ⅱ class 1 and 2 classification  ), to explore the classification based on craniofacial measurement and  type of correlation between the type and type Good distinction between the measurement indicators. A total of 85 non-orthodontic treatment of children in the growing age of 5 years old, 10 years old, 15 years old taken by X-ray cephalometric films for longitudinal study. Set 16 points, leads to 17 lines,