Objective The purpose of this study was to investigate the center height of clinical crowns and the difference among individuals, togetherwiththe regularity of the Spee curve inmandible and compensating curve inmaxilla forthe peoplewith normal occlusion in Chengdu area.Methods The datawere derived from systematically collected people with normal occlusion in Chengdu area, including 36 males and 39 females (ranged from18 to 35 years ). The values of center height of clinical crowns, the depths of Spee curve and curve formed by the center of clinical crowns in mandible were obtained by measurement. After- wards, the distribution of the center height of clinical crowns was analyzed, as well as the depth of curve formed by the center of clinical crowns in mandible and its correlation with depth of Spee.Results (1) The distribution of the center height of clinical crowns accord with normal distribution and the standard deviation was minor(
