Combining the third molar mineralization to further improve the accuracy of the Kvaal's method in dental age estimation of subadults in northern China.
Combining the third molar mineralization to further improve the accuracy of the Kvaal's method in dental age estimation of subadults in northern China.
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DOI：
10.1093/fsr/owad013
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发表时间：
2023-03
影响因子：
1.3
通讯作者：
中科院分区：
文献类型：
--
作者：
第二牙本质的沉积和第三磨牙的矿化所引起的形态变化已被证明与实足年龄有关。然而，在最近的研究中，Kvaal关于次生牙本质沉积理论的方法在牙龄估计方面存在争议。本研究的目的是将Kvaal方法的相关系数较高的参数与第三磨牙的矿化阶段相结合，以提高预测中国北方亚成人牙龄的准确性。本文分析了340例15 ~ 21岁亚成人的数字骨断层摄影。采用训练组对原Kvaal方法的准确性进行了检验，并建立了适用于中国北方亚成虫的新方法。用一个测试组来比较新建立的方法与Kvaal的原始方法和中国北方专门使用的已发表方法的准确性。为了提高估算模型的可行性，我们将第三摩尔的矿化结合起来，建立了一个组合的具体公式。结果表明，联合具体模型将决定系数提高到0.513，估计的标准误差降低到1.482年。结果表明，基于次牙本质沉积和第三磨牙矿化的组合特异性模型可以提高中国北方亚成人牙龄评估的准确性。基于次牙本质沉积的牙髓腔的减少是评估年龄的有用变量。本研究共使用340台骨科断层扫描仪，其中训练组278台，试验组62台。原Kvaal的方法低估了中国北方亚成虫的牙龄。结果表明，本研究构建的联合特异法方程更适合北方亚成人牙龄的计算。
The morphological changes based on deposition of secondary dentin and mineralization of the third molar have been proven to be related to chronological age. However, Kvaal’s method on the theory of deposition of secondary dentin was controversial with respect to dental age estimation in the recent research. The aim of this study was to combine the parameters of Kvaal’s method with relatively high correlation coefficients and mineralization stages of the third molar to improve the accuracy of predicting the dental age of subadults in northern China. A total of 340 digital orthopantomograms of subadults aged from 15 to 21 years were analysed. A training group was used to test the accuracy of the original Kvaal’s method and to establish novel methods for subadults in northern China. A testing group was used to compare the accuracy of the newly established methods with the Kvaal’s original method and with published method specifically used in northern China. To increase the feasibility of our estimation model, we combined the mineralization of the third molar to build a combined specific formula. The results showed that the combined specific model increased the coefficient of determination to 0.513, and the standard error of the estimate was reduced to 1.482 years. We concluded that the combined specific model based on the deposition of secondary dentin and mineralization of the third molar could improve the accuracy of dental age assessment of subadults in northern China. The decrease in the dental pulp cavity based on deposition of secondary dentin is a useful variable for assessing age. A total of 340 orthopantomographs were used in this research, including 278 in training groups and 62 in testing groups. Original Kvaal’s method underestimated the dental age for subadults in northern China. The equation of combined specific method constructed in our study was proved more suitable to calculate dental age for subadults in northern China.
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影响因子：
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