Comparing the accuracy of Demirjian and Nolla methods and establishing a new method for dental age estimation in northeastern Chinese children.
Comparing the accuracy of Demirjian and Nolla methods and establishing a new method for dental age estimation in northeastern Chinese children.
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DOI：
10.1080/20961790.2021.2024655
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发表时间：
2022
影响因子：
1.3
通讯作者：
中科院分区：
文献类型：
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作者：
牙龄推断在临床医学和法医学领域具有重要意义。Demirjian法和Nolla法是牙龄估计的常用评分方法，但这两种方法在中国东北地区儿童中的准确性比较研究尚未见报道。因此，在本研究中，我们比较了这两种方法的准确性，以探索更适合我们研究人群的方法。我们收集了535张北方6 - 15岁儿童的正射断层图像，并将其按7：3的比例分为训练数据集和测试数据集。分别使用Demirjian和Nolla方法估计训练数据集的牙龄。结果表明，两种方法的平均差分别为0.24和-0.40年，平均绝对差分别为0.65和0.59年。为了进一步提高牙龄评估的准确性，在分析Nolla法的总分与训练数据集的年代年龄之间关系的基础上，建立了新的改进公式和牙龄换算表。该方法在数据集检验中得到的平均差和平均绝对差的最小值分别为0.00和0.49，大大小于Demirjian和Nolla方法。新方法和牙龄换算表可能更适合于东北地区儿童的牙龄估计。我们收集了535张北方6 - 15岁儿童的正射断层图像，并将其按7：3的比例分为训练数据集和测试数据集。Demirjian和Nolla方法在训练数据集中的平均差异为0.24和-0.40年，平均绝对差异为0.65和0.59年。通过分析Nolla法的总分与训练数据中的年龄关系，建立了新的改进公式和牙龄换算表。该方法在数据集检验中得到的平均差和平均绝对差的最小值分别为0.00和0.49，大大小于Demirjian和Nolla方法。
Dental age estimation plays an important role in the field of clinic medicine and forensic medicine. The Demirjian and Nolla methods are common scoring methods for dental age estimation but there was no research about the comparison of accuracy of these two methods in northeastern Chinese children. Hence, in this study, we compared the accuracy of these two methods to explore more suitable method for our studied population. We collected 535 orthopantomograms from northern Chinese children aged from 6 to 15 years and divided them into training dataset and testing dataset according to the ratio of 7:3. The dental age of training dataset were estimated using Demirjian and Nolla methods, respectively. The results suggested that the mean differences of these two methods were 0.24 and −0.40 years, and mean absolute difference were 0.65 and 0.59 years. Then to further improve the accuracy of dental age assessment, the new improved formulas and dental age conversion tables were established after analyzing the relationship between the sum scores based on Nolla method and chronology age in training dataset. According to the new method used in testing dataset, the minimum value of mean difference (0.00) and mean absolute difference (0.49) were obtained, which are largely smaller than that of Demirjian and Nolla methods. The new developed method and dental age conversion scales may be more suitable dental age estimation method for northeastern Chinese children. We collected 535 orthopantomograms from northern Chinese children aged from 6 to 15 years and divided them into training dataset and testing dataset according to the ratio of 7:3. The mean differences of Demirjian and Nolla methods in training dataset were 0.24 and −0.40 years, and mean absolute difference were 0.65 and 0.59 years. The new improved formulas and dental age conversion tables were established after analyzing the relationship between the sum score based on Nolla method and chronology age in training dataset. According to the new method used in testing dataset, the minimum value of mean difference (0.00) and mean absolute difference (0.49) were obtained, which are largely smaller than that of Demirjian and Nolla methods.
Cameriere法在华南地区儿童牙龄估算中的应用
影响因子：
1.3
作者：
通讯作者：
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