Tóth Zsuzsanna Olga, Udvar Orsolya, Angyal János
Fogorv Sz. 2014 Sep;107(3):93-8.
Determination of the dental age is a valuable tool in planning of orthodontic treatment and could be used to estimate the chronological age of unidentified human beings. Among the various age estimation methods one of the most accepted one is the Demirjian method, which has already been modified to selected Hungarian population. In this study we have evaluated the association between the dental age determined by panoramic radiography and the chronological age. 199 panoramic radiographs taken from persons between the ages of 2,8 and 20,3 years were selected to the study. The dental ages of persons were estimated either with the Demirjian or the modified Demirjian method adapted to Hungarian population and the results were compared to the chronological ages in selected age groups. Furthermore the angle of the mandible was registered on both sides with an image analysing software. Statistical analysis of data was performed using SPSS software. Our results show that mean values of mandibular angles exhibited a decreasing trend with age. The two age determination methods resulted in different values. Between 3 and 9 years and the age group between 15 and 17,3 years the adapted Hungarian method proved to be more accurate than the Demirjian method. We have established a mathematical function between the two methods. We could conclude that the panoramic radiography based dental age calculation is a reliable method to estimate the chronological age, but the utility of gonial angle has not been proved.
确定牙齿年龄是正畸治疗计划中的一项重要工具,可用于估计身份不明人员的实际年龄。在各种年龄估计方法中,最常用的方法之一是Demirjian法,该方法已针对匈牙利人群进行了修改。在本研究中,我们评估了全景X线片确定的牙齿年龄与实际年龄之间的关联。本研究选取了199张年龄在2.8岁至20.3岁之间的人群的全景X线片。使用Demirjian法或适用于匈牙利人群的改良Demirjian法估计受试者的牙齿年龄,并将结果与选定年龄组的实际年龄进行比较。此外,使用图像分析软件记录双侧下颌角的角度。使用SPSS软件对数据进行统计分析。我们的结果表明,下颌角的平均值随年龄增长呈下降趋势。两种年龄确定方法得出的值不同。在3岁至9岁以及15岁至17.3岁年龄组中,改良的匈牙利方法比Demirjian方法更准确。我们建立了两种方法之间的数学函数。我们可以得出结论,基于全景X线片计算牙齿年龄是估计实际年龄的可靠方法,但下颌角的效用尚未得到证实。