BDJ Open ( IF 2.5 ) Pub Date : 2019-03-21 , DOI: 10.1038/s41405-019-0015-y Amro M Moness Ali 1 , Wael H Ahmed 1 , Nagwa M Khattab 1
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Aims
The aims of this study were to evaluate the applicability of Demirjian’s method for dental age assessment in a group of Egyptian children in Minia city and to develop an age predictive equation suitable for the studied group.
Subjects and methods
In this retrospective, blind, cross-sectional study, 160 dental panoramic radiographs (DPTs) were selected from 420 DPTs from healthy children aged between three and 10 years old from the archived medical files of patients attending Minia University Dental Hospital (MUDH) and evaluated to estimate dental ages.
Results
Age was overestimated for almost all of the studied subjects with an accuracy range from 0.18 to 1.19 years for males and from 0.08 to 0.87 years for females, with the exception of two age subgroups (9–10-year-old males and 10–11-year-old females, for which the mean difference values were −0.06 and −0.008 years, respectively). A Logistic regression was used to generate a suggested formula for dental age estimation.
Conclusions
Demirjian’s method may be unsuitable for Egyptian children living in Minia city. Development of a predication equation and the introduction of adaptable conversion tables to transform the maturity score into a dental age for Egyptian children may be suitable alternatives. The validity of the newly developed prediction equation must be tested among all Egyptian children.
中文翻译：
Demirjian 方法在一组埃及儿童牙齿年龄估计中的适用性
目标
本研究的目的是评估 Demirjian 方法在 Minia 市的一组埃及儿童中进行牙齿年龄评估的适用性，并制定适合研究组的年龄预测方程。
主题和方法
在这项回顾性、盲法、横断面研究中，从 3 至 10 岁健康儿童的 420 份 DPT 中选择了 160 份牙科全景 X 光片 (DPT)，这些照片来自于米尼亚大学牙科医院 (MUDH) 就诊的患者的存档医疗档案，并进行了评估估计牙齿年龄。
结果
几乎所有研究对象的年龄都被高估了，男性的准确度范围为 0.18 至 1.19 岁，女性的准确度范围为 0.08 至 0.87 岁，但两个年龄亚组（9-10 岁男性和 10-11 岁）除外岁女性，平均差值分别为 -0.06 和 -0.008 岁）。逻辑回归用于生成牙齿年龄估计的建议公式。
结论
Demirjian 的方法可能不适合居住在米尼亚市的埃及儿童。开发预测方程和引入可调整的转换表以将成熟度分数转换为埃及儿童的牙齿年龄可能是合适的替代方案。必须在所有埃及儿童中检验新开发的预测方程的有效性。
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