Akademik Veri Yönetim Sistemi
29th International Congress of Turkish Society of Paediatric Dentistry, Ankara, Türkiye, 12 - 15 Ekim 2023, ss.71
Aim: The chronological age estimation method,which is performed by determining the dental age,is one of the easy and reliable methods to use.
The aim of this study was to evaluate the accuracy between dental age determined by the Nolla method and chronological age in a group of children living in the Northwest Anatolian region.
Methods: A total of 1014 panoramic radiographs of 528 boys and 486 girls aged 6 to 14 years were retrospectively analyzed in this study. “Chronological age” was calculated by subtracting the date of birth from the date the panoramic radiograph was taken,and “dental age” was calculated
using the Nolla method. Mean dental age and chronological age were analyzed by Paired Sample T-test and Wilcoxon Signed-Rank test according
to sex and age groups.The closeness of the dental age to the chronological age was found by calculating the mean absolute error and the accuracy of the Nolla method was determined.
Results: It was found that Nolla method overestimated the chronological age in the whole group (0.04) and boys (0.31),and underestimated the
chronological age in girls (-0.25). With Nolla method,age was underestimated in boys only in the 13-year-old group (-0.06), while in girls, age was
underestimated in all age groups. Mean absolute error in both girls and boys was the lowest in the age group of 7 years and was found to be
statistically significant (p<0.05).
Conclusions: Although the Nolla method may not be entirely accurate for children living in the Northwest Anatolian region,it can provide results
that are close to chronological age.
Keywords: age estimation, dental age, nolla method, panoramic radiographs