Author:

Keywords:

Science & Technology, Life Sciences & Biomedicine, Medicine, Legal, Legal Medicine, Forensic odontology, Forensic age estimation, Age determination, Dental development, Somali, Bayesian age estimation, CHRONOLOGICAL AGE, ESTIMATION CHARTS, TOOTH FORMATION, WILLEMS METHOD, WISDOM TOOTH, ACCURACY, MINERALIZATION, MATURITY, CALCULATE, SKELETAL, Adolescent, Age Determination by Teeth, Child, Child, Preschool, Dentition, Permanent, Female, Finland, Humans, Image Processing, Computer-Assisted, Male, Molar, Third, Radiography, Dental, Digital, Somalia, Young Adult, 0399 Other Chemical Sciences, 0699 Other Biological Sciences, 1103 Clinical Sciences, Legal & Forensic Medicine, 3199 Other biological sciences, 3202 Clinical sciences, 3499 Other chemical sciences

Abstract:

Estimation of an individual’s age has important applications in forensics. In young individuals, it often relies on separate evaluations of permanent teeth (PT) and third molars (TM) development. Here we analysed the age prediction performance of combined information from PT and TM in an unusual sample of healthy Somalis, born and living in Finland. PT development was staged according to Demirjian et al. (Hum Biol, 1973) and TM development according to Köhler et al. (Ann Anat, 1994), using panoramic radiographs from 803 subjects (397 males, 406 females) aged 3-23 years. A sex-specific Bayesian age-estimation model for the multivariate distribution of the stages conditional on age was fitted on PT, TM, and PT and TM combined. The age-estimation performances were validated and quantified. The approach combining PT and TM only overestimated age with an ME of -0.031 years in males and -0.011 years in females, indicating the best age prediction performance.