Dental age assessment in a northern Chinese population.
Dental age assessment in a northern Chinese population.
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DOI：
10.1016/j.jflm.2015.11.011
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发表时间：
2016-02
影响因子：
1.5
通讯作者：
Yue Zhai;Hyun Park;Junli Han;Haining Wang;Fang Ji;J. Tao
中科院分区：
文献类型：
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作者：
Yue Zhai;Hyun Park;Junli Han;Haining Wang;Fang Ji;J. Tao
简介年龄估计在儿科牙科、正畸和法医学领域势在必行。研究表明，通过放射学方法估算牙龄是可靠且非破坏性的。尽管 Demirjian 方法是使用最广泛的估计方法，但在最近的研究中，发现 Willems 方法更为准确。本研究的目的是比较牙齿年龄估计方法的准确性，并修改 Demirjian 方法，使其更适用于中国北方人群。材料和方法对年龄在 11 至 18 岁的中国北方人群（392 名男孩和 612 名女孩）的 1004 幅数字正畸影像进行了评估。使用 Demirjian 方法和 Willems 方法计算牙齿年龄。通过配对 t 检验和 Wilcoxon 符号秩检验对实际年龄和牙龄之间的差异进行统计分析。采用非线性拟合方法构建数学模型，对Demirjian方法进行修正。结果Demirjian方法低估男孩年龄0.47岁，低估女孩0.63岁，而Willems方法低估男孩年龄0.54岁，女孩年龄1.01岁。 Demirjian方法的平均绝对误差为1.08 y，Willems方法的平均绝对误差为1.22 y。结论与Willems方法相比，Demirjian方法在估计牙龄方面更准确。然而，Demirjian方法可能并不适合中国北方人群；因此，应该对其进行修改，以便可以用于该人群。
IntroductionAge estimation is imperative in the fields of paediatric dentistry, orthodontics and forensic science. Studies have shown that dental age estimation by the radiological method is reliable and non-destructive. Although Demirjian's method was the most widely used estimation method, in recent studies, the Willems' method has been found to be more accurate. The aim of this study was to compare the accuracy of dental age estimation methods and to modify the Demirjian method to make it more applicable for a northern Chinese population.Materials and methodsAn assessment was made of 1004 digital orthopantomographs of a northern Chinese population (392 boys and 612 girls) ranging in age from 11 to 18 years old. Dental ages were calculated using both the Demirjian method and the Willems method. Discrepancies between chronological ages and dental ages were statistically analysed by the paired t-test and the Wilcoxon signed rank test. A nonlinear fitting method was applied to construct a mathematical model to modify the Demirjian method.ResultsThe Demirjian method underestimated age by 0.47 y in boys and 0.63 y in girls, while the Willems method underestimated age by 0.54 y and 1.01 y in boys and girls, respectively. The mean absolute error was 1.08 y for the Demirjian method and 1.22 y for the Willems method.ConclusionThe Demirjian method was more accurate for estimating dental age compared with the Willems method. However, the Demirjian method may not be suitable for the northern Chinese population; therefore, it should be modified so that it can be used for this population.