Assessment of dental maturity of children aged 7-15 years using demirjian method in a selected Iranian population.
BACKGROUND
Dental age can be estimated on the basis of the tooth mineralization level during the developmental process of the teeth. Among various radiological methods reported for the dental age determination in children, Demirjian method is widely used.


OBJECTIVE
To evaluate the applicability of Demirjian method in age estimation of the children aged 7-15 years in Babol, a northern city of Iran.


METHODS
A cross sectional study was performed on the panoramic radiographs of 168 individuals with 7-15 years old. Maturation of the seven permanent teeth on the left side of the mandible was determined according to the crown and root development stages; described by Demirjian method. The mean of the dental age (DA) according to the Demirjian was compared to the mean of chronological age (CA). Data were collected and analyzed using SPSS, V18. P-values<0.05 were considered significance.


RESULTS
The mean and the SD of CA was 11.06±2.29 (boys: 11.08±2.31, girls: 11.03±2.28). The mean and the SD of DA was 11.44±2.85 (boys: 11.81±2.93, girls: 11.08±2.73) and the mean and the SD of DA minus CA for all of the children were 0.38±1.24 (boys: 0.72±1.2, girls: 0.05±1.21). Also, t-Test analysis showed the differences of the mean value of the estimated - chronological age difference was statistically significant between the boys and the girls group (p< 0.001).


CONCLUSIONS
Considering the determined differences between estimated dental age and chronological age in this study; Demirjian method can be applicable for estimation of dental age in girls and boys before their puberty in northern of Iran.
Dental Material Research Center, Dept. of Oral and Maxillofacial Radiology, Dental School, Babol University of Medical Sciences, Babol, Iran.
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Abesi
Dental Material Research Center, Dept. of Oral and Maxillofacial Radiology, Dental School, Babol University of Medical Sciences, Babol, Iran.
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Haghanifar
Academic member, Dept. of Social Medicine, Medical School, Babol University of Medical Sciences, Babol, Iran.
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Sajadi
Dentist, Dental School, Babol University of Medical Sciences, Babol, Iran.
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Valizadeh
Dept. of Social Medicine, Medical School, Babol University of Medical Sciences, Babol, Iran.
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Khafri
Age determination by teeth; Calcification; Panoramic Radiography