Gandaki Medical College Teaching Hospital and Research Center Pvt Ltd, Gandaki Province, Pokhara, Nepal.
College of Medical Sciences, Bharatpur, Chitwan, Bagmati Province, Nepal.
J Nepal Health Res Counc. 2021 Apr 23;19(1):101-106. doi: 10.33314/jnhrc.v19i1.3397.
The average stage of attrition in permanent first and second molars is an established method of age estimation in the adult population. The study was conducted with an objective of age estimation from the average stage of attrition of permanent molars.
A total of 451 individuals of age more than 20 years were examined. Nepalese individuals with intact first and second permanent molars in the maxillary and mandibular arch on either side were included. The average stage of attrition of the maxillary first and second permanent molars on either side was calculated and subjected to regression analysis to derive equations.
Among a total of 451 participants, 231 (51.22%) were females and 220 (48.78%) males, with a mean age of 44.3 ± 13.9 years. There was a strong correlation between age and average stage of attrition of molars. The correlation was stronger for upper molars compared to the lowers. Additionally, the mean of the difference between real age and estimated age was lower for maxillary compared to mandibular molars. Compared to age estimation by univariable regression, multivariable regression had greater accuracy. Similarly, estimation of age from maxillary molars was more accurate as compared to mandibular (difference in years: 3.82 ± 3.03 for maxillary molars and 5.17 ± 4.2 for mandibular molars).
Maxillary teeth are better for age estimation and using both maxillary first and second permanent molars gives better accuracy.
恒磨牙磨耗平均阶段是成人年龄推断的既定方法。本研究旨在通过恒磨牙磨耗平均阶段来进行年龄推断。
共检查了 451 名年龄在 20 岁以上的个体。纳入了双侧上颌和下颌弓中具有完整第一和第二恒磨牙的尼泊尔个体。计算了双侧上颌第一和第二恒磨牙的平均磨耗阶段，并进行回归分析以推导出方程。
在总共 451 名参与者中，231 名（51.22%）为女性，220 名（48.78%）为男性，平均年龄为 44.3 ± 13.9 岁。年龄与磨牙平均磨耗阶段之间存在很强的相关性。上颌磨牙的相关性强于下颌磨牙。此外，真实年龄与估计年龄之间的差异平均值上颌磨牙低于下颌磨牙。与单变量回归相比，多变量回归具有更高的准确性。同样，上颌磨牙的年龄估计比下颌磨牙更准确（差异年数：上颌磨牙为 3.82 ± 3.03，下颌磨牙为 5.17 ± 4.2）。
上颌牙齿更适合年龄估计，使用上颌第一和第二恒磨牙可以提高准确性。
