Rai Balwant, Kaur Jasdeep, Jafarzadeh Hamid
Oral Imaging center, School of Dentistry, Oral Pathology and Maxillofacial Surgery, Catholic University Leuven, Leuven, Belgium.
J Forensic Leg Med. 2010 Aug;17(6):309-11. doi: 10.1016/j.jflm.2010.04.010. Epub 2010 May 15.
A sharp increase in forensic age estimation of living persons has been observed in recent years. However, ethnic populations residing in different countries have been insufficiently analyzed. The aim of this study was to achieve a referral database and regression equations for dental age estimation of unaccompanied minors of Iran nationality. A total of 1200 orthopantomograms were collected from original Iran and equally divided in age categories between 10 and 27 years. On the radiographs, the developmental stage of the third molars was scored applying a Demirjian et al. scoring technique. Inter- and intra-observer reliabilities were tested using kappa statistics. Correlation between the scores of all four wisdom maxillary and mandibular third molars teeth and left/right symmetry were evaluated with spearman correlation coefficient. Student's t-test on asymmetry was performed and regression formulas were calculated. The present database was the first to assemble third molar developmental scores on radiographs of Iran individuals and provided more appropriate dental age estimation of unaccompanied Iran minors. To enhance the accuracy of forensic age estimates based on third molars mineralization, the use of population-specific standards is recommended.
近年来，活体法医年龄估计数量急剧增加。然而，对居住在不同国家的不同种族人群的分析还不够充分。本研究的目的是建立一个参考数据库和回归方程，用于估计伊朗籍无人陪伴未成年人的牙齿年龄。共收集了1200张来自伊朗本土的曲面断层片，并将其按年龄分为10至27岁的年龄段。在X光片上，应用Demirjian等人的评分技术对第三磨牙的发育阶段进行评分。使用kappa统计量测试观察者间和观察者内的可靠性。用斯皮尔曼相关系数评估上颌和下颌四颗智齿的得分与左右对称性之间的相关性。对不对称性进行了学生t检验并计算了回归公式。本数据库首次收集了伊朗人X光片上第三磨牙的发育评分，为无人陪伴的伊朗未成年人提供了更合适的牙齿年龄估计。为提高基于第三磨牙矿化的法医年龄估计的准确性，建议使用特定人群的标准。
