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本研究的目的是 :1.根据四种已报告的流行病学调查结果计算出的前牙比、全牙比数值与Ｂｏｌｔｏｎ数值相比较。 2 .评价测量牙齿大小不调的方法的精确性。 3.考察牙齿大小不调究竟在多大程度上影响最终关系。 4.考察整平Ｓｐｅｅ曲线对关系的影响。 5 .评价拔除四个第一前
The purpose of this study was to: 1. Compare anterior teeth ratio, total teeth ratios with Bolton values based on four reported epidemiological findings. 2. Evaluate the accuracy of the method for measuring tooth size. 3. Examine the extent to which tooth size does not affect the final relationship. 4. Investigate the effect of flattening Spee curve on the relationship. 5. Evaluation of the first four removed