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The comparison of coincidence rate of dental age based on Demirjian and Nolla methods by chronological age in 5 to 16 years old children in Hamedan city
Arghavan Kamali Sabeti , Fahimeh Daneshyar *, Hamid Yazdanfar , Artin Kamali Sabeti
Pediatric Resident , fa.daneshyar70@gmail.com
Abstract:   (303 Views)
Background: Considering the different results of dental age estimation tests in different populations and lack of sufficient studies on the Iranian race, this study was designed to compare the coincidence rate of Demirjian and Nolla Methods in dental age estimation.
Materials and Methods: 185 panoramic radiographs from medical documents of pediatric and orthodontic department of dentistry faculty were assessed. The maturation of each mandible left side permanent teeth except the third molars was determined. According to their development stage, teeth were categorized from A to H in Demirjian and from 0 to 10 in Nolla method. Data were analyzed by SPSS-16 software and the results were reported.
Results: The mean age was 9.6±2.8. For both genders, the Nolla and Demirjian methods have underestimation and overestimation respectively compared to chronological age. Pearson correlation coefficient for chronological age and Nolla was (ρmale=0.982, ρfemale=0.985) and for chronological age and Demirjian was (ρmale=0.987, ρfemale=0.988). Difference between chronological age and dental age for Nolla method in boys was from -0.02 to 0.77 and in girls was from -0.1 to 0.70 and for Demirjian method in boys was from 0.02 to 0.76 and in girls was from 0.05 to 0.9.
Conclusion: The Demirjian and Nolla methods tend to overestimate and underestimate the real age respectively. According to the mean differences between chronological age and dental age in two methods, Nolla was lower in comparison to Demirjian, So Nolla method has more accurate estimation of chronological age. Therefore, the preference of Nolla method is resulted.
Keywords: Age Determination by Teeth, Chronology, Methods, Pediatric dentistry
     
Type of Study: Research | Subject: medicine, paraclinic
Received: 2017/09/22 | Accepted: 2018/01/15 | Published: 2018/01/15
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Kamali Sabeti A, Daneshyar F, Yazdanfar H, Kamali Sabeti A. The comparison of coincidence rate of dental age based on Demirjian and Nolla methods by chronological age in 5 to 16 years old children in Hamedan city. Feyz. 2018; 22 (1)
URL: http://feyz.kaums.ac.ir/article-1-3434-en.html


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