ABSTRACT
Sixty permanent mandibular teeth [individuals of both sexes aged 6-14 years] were used in this study to determine the dental age using digital radiographic analysis and racemization of aspartic acid in dentine. The results of digital radiographic analysis of various teeth showed that the estimated age of teeth was related to the chronological age within an error +/- 2 years around an estimated age. Also, the estimated age of teeth was correlated closely with the actual age within an error range of +/- 2-4 years. It was concluded that the digital radiographic analysis of teeth for age determination was easier and more accurate than the chemical method [racemization of aspartic acid]
Subject(s)
Humans , Male , Female , Radiography, Dental, Digital , Aspartic Acid , Dentin , Dentition, Permanent , ToothABSTRACT
Ultrasonographic examinations were performed to 189 pregnant Egyptian wome in Al-Zahraa and Said Galal University Hospital. Sonograhic identification and measurements of head and abdominal circumference. Liver. Kidney, femur and foot length were preformed between 20 and 40 weeks gestation. A highly significant correlation was found between the previous fetal biometrical parameters and gestational age and also between each other. An equation from each parameter was concluded by using simple linear regression to calculate the expected gestational age per week. A general equation was deduced from all previous fetal parameters to predict the gestational age