IBRAHIM H. ELKALLA¹, ABEER M. ABD ELLATIF ²,& AHMED H. IBRAHIM³, ¹Professor of Pediatric Dentistry and Head of Pediatric Dentistry and Dental Public Health Department, Faculty of Dentistry, Mansoura University, Mansoura, Egypt. ²Associate Professor of Pediatric Dentistry, Faculty of Dentistry, Mansoura University, Mansoura, Egypt. ³Assistant Lecturer of Pediatric Dentistry, Faculty of Dentistry, Mansoura University, and Mansoura, Egypt Abstract: Objectives:To develop standards for assessment of dental development in Egyptian population and to evaluate the nature of the interrelationship between chronological and dental ages.. Methods:The study was conducted on 4420 panoramic radiographs for Egyptian children and adolescents aged 3 to 17 years males and females. The panoramic radiographs were interpretated and the stages of teeth development were determined according to Demrijian's system. The dental age was compared with the chronological age, and deviations were calculated. For estimation of Egyptian population standard, logistic curve was constructed using the equation; Y = 100*{eα +βx/ (1 + eα + βx)}. Graphs and tables were produced to transfer the maturity scores calculated by the method of Demirjian into Egyptian dental age. Results:Statistical analysis of the data revealed significant difference between the chronological and the dental age of the Egyptian children when based on Demirjian's tables. Chronological age and dental age showed high correlation with no sgnificant difference when based on the special tables constructed. Conclusions:The dental age for Egyptian children should be assessed using our equations and tables.