Abstract: Objective To establish mathematical models which are used to assess bone age of living subjects in Chinese Han female teenagers.Methods Radiographs were taken from 838 normal Chinese female subjects aged from 11 to 20 years old including sternal end of clavical and the left side of shoulder,elbow,carpal,hip,knee and ankle joints,which were from Middle China,South China and East China.Then read and grade the 24 osteal loci in accordance with the grading criteria of skeletal growth of teenagers.Meanwhile,the influencing factors such as:height,body mass and location are all taken into account.To explore the associativity between each index and chronological age,all the statistic procedures were finished by SAS 8.1 and SPSS 11.0.Results To construct several combining multiple regression mathematical models that use the arrested extent of epiphysis of sternal end of clavical and six joints to assess the chronological age of living subjects in Chinese Han female teenagers,and establish some Fisher's discriminatory analysis equations which are used to determine whether the chronological age of Chinese Han female teenagers has been to 14,16 and 18 years old or not.Conclusion These mathematical models which used to assess the age of living subjects has profused the methods of forensic bone age identification of living subjects.It also made the methods and conclusions much more scientific and accurate.

Key words: forensic anthropology, female teenager, bone age, epiphysis, mathematical models