Lopez Thais Torralbo, Arruda Caroline Parducci, Rocha Marcos, Rosin Ana Silvia André de Oliveira, Michel-Crosato Edgard, Biazevic Maria Gabriela Haye
Universidade de São Paulo, Faculdade de Odontologia, Departamento de Odontologia Social, Avenida Professor Lineu Prestes 2227, 0550800 São Paulo-SP, Brazil.
J Forensic Leg Med. 2013 Jul;20(5):412-8. doi: 10.1016/j.jflm.2012.12.001. Epub 2013 Jan 18.
The purpose of this study was to estimate age through the analysis of third molar stages of development in Brazilian young adults. A cross-sectional study was conducted by analyzing 659 panoramic X-rays. Two techniques were used to establish the stages: Modified Scoring (MST) and Demirjian (DT). Regression formulas were calculated. Statistical analyses were conducted by t, Kappa tests, and simple and multiple linear regressions (5% level of significance). Out of the participants, 40.7% were female and 59.3% were male, with ages from 15-22 years. The Kappa test showed good results for intra-observer (0.84 for MST and 0.95 for DT) and inter-observer examination (0.81 for MST and 0.92 for DT). Differences were found in the stages of tooth formation between male and female, but differences were not observed between the left and right sides. We found that both DT and MST underestimated the ages in about 6 months, depending on the used classification and number of teeth. These methods are appropriate for assessing the ages of young Brazilians, although the DT showed better reproducibility.
本研究的目的是通过分析巴西年轻成年人第三磨牙的发育阶段来估计年龄。通过分析659张全景X线片进行了一项横断面研究。采用两种技术确定发育阶段：改良评分法（MST）和德米尔坚法（DT）。计算了回归公式。通过t检验、卡方检验以及简单和多元线性回归进行统计分析（显著性水平为5%）。参与者中，40.7%为女性，59.3%为男性，年龄在15至22岁之间。卡方检验显示观察者内（MST为0.84，DT为0.95）和观察者间检查（MST为0.81，DT为0.92）结果良好。在牙齿形成阶段发现了男女之间的差异，但左右两侧未观察到差异。我们发现，根据所使用的分类和牙齿数量，DT和MST都会低估年龄约6个月。这些方法适用于评估巴西年轻人的年龄，尽管DT显示出更好的可重复性。
