Abstract: Objective: To measure length and width-to-length ratio of clinical crown of upper anterior teeth in Chinese Han adults. Methods: Ninety-one college students of Chinese Han (32 males and 59 females) from Wuhan University were recruited during the year 2011 to 2012. Dental casts were obtained to measure the clinical crown width (CCW) and length (CCL) and width-to-length ratio (CCW/CCL) of upper bilateral central (U1) and lateral (U2) incisors and canines (U3). Results: CCLs of U1, U2 and U3 were 10.27, 8.87 and 10.19 mm in male and 9.72, 8.36 and 9.46 mm in female, respectively. CCW/CCLs of U1, U2 and U3 were 0.82, 0.79 and 0.80 in male and 0.86, 0.83 and 0.84 in female, respectively. Regarding CCL, there were significant bilateral differences (left>right, P<0.05) and sex differences (male>female, P<0.01). The CCW/CCLs of U1, U2 and U3 were different between male (U1=U3>U2) and female (U1>U3>U2). In terms of tooth size proportion, there was no sex differences for either CCL (117∶100∶114) or CCW (120∶100∶115). Conclusion: The data regarding CCL and CCW/CCL of upper anterior teeth of Chinese Han adults would provide references for esthetic management of periodontist and prosthodontist and development of related commercial products.

Key words: Clinical crown, Length Width , Width-to-length ratio, Chinese Han