Rami Rabie¹, AmalAbd El-Salam El-Bakary², Menatalla M. Elhindawy³and El hawary Y.M^{4 1- General dentist at central security hospital, Egypt. 2- Professor of Forensic Medicine & Clinical Toxicology, Faculty of Medicine, Mansoura University, Egypt. 3- Lecturer of Oral Biology, Faculty of Dentistry, Mansoura University, Egypt. 4- Professor of  OralBiology, Faculty of Dentistry, Mansoura University, Egypt..} Abstract: Background: Tooth development is widely used in determining age and state of maturity. Dental age is of high importance in forensic and pediatric dentistry and also orthodontic treatment planning. Objective: This study was conducted to compare between three methods used for age assessment and to find the most appropriate method for estimation of age in the Egyptian children Materials& methods:Panoramic radiographs of 310 children (127 boys, 183 girls) aged between 5 and 16 years were evaluated. Dental age of the subjects was determined through Demirjian's, Willem's and Cameriere's methods. Differences and correlations between chronological and dental ages were assessed by statistical analysis. Results:The mean chronological age of the subjects was 11.22 ± 2.72 years. Overestimations of age were observed following the use of Demirjian's method (0.88 ± 2.8 years), and Willem's method (0.35 ± 2.75 years). However, Cameriere's method underestimated age by 0.53 ± 2.21 years. Pearson's correlation analysis suggested linear correlations between chronological age and dental age determined by all three methods. Conclusion: Our findings indicated willem's method to have the highest accuracy among the three assessed methods. However, all three methods can be used with acceptable accuracy.