Augusto Diana, Pereira Cristiana Palmela, Rodrigues Ana, Cameriere Roberto, Salvado Francisco, Santos Rui
- Faculty of Dental Medicine, University of Lisbon, Portugal. Orcid Number: 0000-0003-2698-6210, Student of master's in dental medicine.
- Faculty of Dental Medicine, University of Lisbon, Portugal. Orcid Number: 0000 0002 9164 7189.
Acta Stomatol Croat. 2021 Mar;55(1):45-55. doi: 10.15644/asc55/1/6.
Better understanding of dental age assessment may help in cases of age estimation in Forensic Clinics. The first aim was to provide essential information on method reliability for upcoming studies using dental age assessment by second molar index (I), and third molar index (I) for age estimation on legal ages of 12 - 14 years. The second aim was to document forensic method outcomes of the Demirjian method which has already been used in forensic clinic.
Two samples were used for this purpose: for I, 633 orthopantomographs (270 females / 363 males), the age range from 7 to 17 years and for I, 471 orthopantomographs (253 females / 218 males), the age range from 10 to 23 years, from the database population of Lisbon North University Hospital Center, approved by the Ethic Committee.
The I cut-off point (1.133) for 12- year- olds obtained better results than the cut-off point stated by the I (0.135). Besides, I cut-off point (0.001) for 14- year- olds showed better results when compared with the cut-off point (0.705) established by the I. Both methods are reliable for the legal age thresholds of 12 and 14 years. However, using I and I allows us to vary the cut-off value to privilege sensitivities or specificity, depending on which is more appropriate to the intended application.
The accuracy (88.94%) of I obtained better results for the 12- year- old cut-off point (1.133) and the accuracy (90.21%) of the I performed better for the 14- year- old cut-off point (0.001).
更好地理解牙龄评估有助于法医诊所进行年龄估计。首要目的是为即将开展的研究提供有关方法可靠性的基本信息，这些研究使用第二磨牙指数（I）和第三磨牙指数（I）来估计12至14岁法定年龄的年龄。第二个目的是记录已在法医诊所使用的德米尔jian方法的法医方法结果。
为此使用了两个样本：对于I，633张口腔全景片（女性270例/男性363例），年龄范围为7至17岁；对于I，471张口腔全景片（女性253例/男性218例），年龄范围为10至23岁，来自里斯本北部大学医院中心的数据库人群，经伦理委员会批准。
12岁儿童的I截断点（1.133）比I规定的截断点（0.135）取得了更好的结果。此外，14岁儿童的I截断点（0.001）与I确定的截断点（0.705）相比显示出更好的结果。两种方法对于12岁和14岁的法定年龄阈值都是可靠的。然而，使用I和I使我们能够根据预期应用中更合适的情况来改变截断值以优先考虑敏感性或特异性。
I的准确性（88.94%）在12岁截断点（1.133）取得了更好的结果，I的准确性（90.21%）在14岁截断点（0.001）表现更好。
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