利用数字全景X线摄影术通过伊朗人群中犬齿的牙髓/牙齿比例进行年龄估计。
Age estimation by canines' pulp/tooth ratio in an Iranian population using digital panoramic radiography.
作者信息
Dehghani Mahdieh, Shadkam Elaheh, Ahrari Farzaneh, Dehghani Mahboobe
机构信息
Department of Oral and Maxillofacial Radiology, Faculty of Dentistry, Shahid Sadoughi University of Medical Sciences, Yazd, Iran.
Department of Orthodontics, School of Dentistry, Mashhad University of Medical Sciences, Vakilabad Blvd., Mashhad, Iran.
出版信息
Forensic Sci Int. 2018 Apr;285:44-49. doi: 10.1016/j.forsciint.2018.01.016. Epub 2018 Feb 1.
OBJECTIVE
Age estimation in adults is an important issue in forensic science. This study aimed to estimate the chronological age of Iranians by means of pulp/tooth area ratio (AR) of canines in digital panoramic radiographs.
MATERIALS AND METHODS
The sample consisted of panoramic radiographs of 271 male and female subjects aged 16-64 years. The pulp/tooth area ratio (AR) of upper and lower canines was calculated by AutoCAD software. Data were subjected to correlation and regression analysis.
RESULTS
There was a significant and inverse correlation between age and pulp/tooth area ratio of upper and lower canines (r=-0.794 for upper canine and r=-0.282 for lower canine; p-value<0.001). Linear regression equations were derived separately for upper, lower and both canines. The mean difference between actual and estimated age using upper canine was 6.07±1.7.
CONCLUSION
The results showed that the pulp/tooth area ratios of canines are a reliable method for age estimation in Iranians. The pulp/tooth area ratio of upper canine was better correlated with chronological age than that of lower canine.
目的
在法医学中，成年人年龄估计是一个重要问题。本研究旨在通过数字化全景X线片中犬齿的牙髓/牙齿面积比（AR）来估计伊朗人的实际年龄。
材料与方法
样本包括271名年龄在16 - 64岁之间的男性和女性的全景X线片。上下颌犬齿的牙髓/牙齿面积比（AR）通过AutoCAD软件计算得出。数据进行了相关性和回归分析。
结果
年龄与上下颌犬齿的牙髓/牙齿面积比之间存在显著的负相关（上颌犬齿r = -0.794，下颌犬齿r = -0.282；p值<0.001）。分别得出了上颌、下颌以及双侧犬齿的线性回归方程。使用上颌犬齿估计实际年龄与估计年龄的平均差值为6.07±1.7。
结论
结果表明，犬齿的牙髓/牙齿面积比是估计伊朗人年龄的可靠方法。上颌犬齿的牙髓/牙齿面积比与实际年龄的相关性优于下颌犬齿。
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