ArticleChildren (Basel, Switzerland)2025
Evaluating the Nolla Method for Dental Age Estimation in Children from Northwestern Romania.
Article in Children (Basel, Switzerland), 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 3 papers.
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3 citing papers in PubMed.
- Population-adapted Nolla method for dental age estimation in Northwestern Romanian children.BMC oral health · 2026Article
- Exploratory Analysis of Dental Age Differences in Children with Type 1 Diabetes Using the Demirjian Method.Diagnostics (Basel, Switzerland) · 2026Article
- Assessment of Apical Patency in Permanent First Molars Using Deep Learning on CBCT-Derived Pseudopanoramic Images: A Retrospective Study.Bioengineering (Basel, Switzerland) · 2025Article
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5 authors.
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Abstract
BACKGROUND/
objectivesDental age estimation plays a critical role in pediatric dentistry, orthodontics, and forensic medicine. The Nolla method, widely applied globally, has shown variable accuracy across different populations. This study aimed to evaluate the applicability and accuracy of the Nolla method in estimating the dental age of Romanian children and to identify potential discrepancies between dental and chronological ages.
methodsA retrospective analysis was conducted on 860 panoramic radiographs from pediatric patients aged 3-15.9 years in Oradea, Romania. The Nolla method was applied to estimate dental age, and the results were compared with chronological age. Statistical analyses, including Wilcoxon signed-rank and Mann-Whitney U tests, were performed to evaluate the accuracy and consistency of the Nolla method.
resultsThe study analyzed 860 panoramic radiographs (356 boys and 504 girls). The average chronological age was 9.95 ± 2.48 years, while the average dental age, as estimated using the Nolla method, was 8.43 ± 2.13 years. Dental age was consistently lower than chronological age, with a median difference of 1.5 years (IQR: 0.9-2.2 years). Among the 13 age groups, the highest representation was found in the 8-8.9-year (14.7%) and 9-9.9-year (13.3%) groups. Gender differences were statistically significant (
conclusionsThe Nolla method consistently underestimated dental age in Romanian children, with greater discrepancies in older age groups and among girls. These findings highlight the need for the population-specific calibration of the method to improve its accuracy in both clinical and forensic contexts.
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