Age assessment 1 Article 1 Cronbach alpha coefficient 1 Demirjian method 1 Demirjian's method 1 Forensic science 1 Omani Omani children 1 Student t test 1 adolescent 1 age 1 child 1 controlled study 1 correlation coefficient 1 cross-sectional study dental age estimation 1 dental procedure 1 female 1 human 1 intraobserver reliability 1 male 1 mathematical analysis 1 military medicine 1 panoramic radiography 1 plots and curves 1 preschool child 1 reliability 1 school child 1 scoring system 1 sex difference 1