External validation of a country-specific model for radiographic dental age assessment of Brazilian children and adolescents

IF 1.5 Q3 Medicine

Morphologie Pub Date : 2026-03-01 Epub Date: 2025-12-05 DOI:10.1016/j.morpho.2025.101099

A.F. de Oliveira , B.P. Zanovello , D.D. Moreira , A. Franco

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引用次数: 0

Abstract

Dental age assessment may have important clinical and forensic applications. Testing the existing methods is fundamental to promoting best clinical and forensic practices. The present study aimed to test a Brazilian country-specific model for dental age assessment in a population of Bahia State, Brazil. A total of 1009 panoramic radiographs of Brazilian individuals (n = 556, 55.1% females and 453, 44.9% males) aged between 6 and 15.99 years were collected. The seven permanent left mandibular teeth from central incisor to second molar were analyzed in each radiograph. Demirjian's dental staging technique was applied followed by age estimation through Franco's dental age assessment model. Differences between chronological and estimated ages were quantified as mean error (ME), mean absolute error (MAE), and root means squared error (RMSE). The overall (sex combined) ME, MAE, RMSE were −0.51, 1.11, 1.63, respectively. For females and males separately, the error metrics were: −0.55, 1.16, 1.65 and −0.45, 1.05, 1.59, respectively. Bland-Altman plots showed narrower age limits among males, while higher discrepancies were observed for females. The analysis based on age categories showed the worst predictions between the ages of 6 and 6.99 years. The tested country-specific model was applicable to individuals aged above 7 years in the target population, being an alternative for dental age assessment.

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巴西儿童和青少年放射学牙齿年龄评估的国家特定模型的外部验证

牙齿年龄评估可能具有重要的临床和法医应用。测试现有方法是促进最佳临床和法医实践的基础。本研究旨在测试巴西巴伊亚州人口牙齿年龄评估的巴西国家特定模型。收集了年龄在6 ~ 15.99岁之间的巴西个体（n = 556，女性占55.1%,4553，男性占44.9%）的全景x线片1009张。从中切牙到第二磨牙共7颗左下颌恒牙进行x线片分析。采用Demirjian牙龄分期技术，通过Franco牙龄评估模型进行牙龄估计。实足年龄和估计年龄之间的差异量化为平均误差（ME）、平均绝对误差（MAE）和均方根误差（RMSE）。总ME、MAE、RMSE分别为- 0.51、1.11、1.63。对于女性和男性，误差指标分别为：- 0.55、1.16、1.65和- 0.45、1.05、1.59。Bland-Altman图显示，男性的年龄界限较窄，而女性的差异较大。基于年龄类别的分析显示，6岁至6.99岁之间的预测最差。所测试的国家特定模型适用于目标人群中7岁以上的个体，是牙齿年龄评估的替代方法。

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来源期刊

Morphologie Medicine-Anatomy

CiteScore

2.30

自引率

0.00%

发文量

150

审稿时长

25 days

期刊介绍： Morphologie est une revue universitaire avec une ouverture médicale qui sa adresse aux enseignants, aux étudiants, aux chercheurs et aux cliniciens en anatomie et en morphologie. Vous y trouverez les développements les plus actuels de votre spécialité, en France comme a international. Le objectif de Morphologie est d?offrir des lectures privilégiées sous forme de revues générales, d?articles originaux, de mises au point didactiques et de revues de la littérature, qui permettront notamment aux enseignants de optimiser leurs cours et aux spécialistes d?enrichir leurs connaissances.