河南省安阳市6-15周岁汉族人牙龄的研究

目的建立利用牙齿钙化程度推断未成年人年龄的方法。方法选取河南省安阳市1575名（男性900名，女性675名）6～15周岁人群的全口曲面断层影像片，依照牙齿钙化分级标准对下颌恒牙钙化程度进行评分分级；所得数据经SPSS13．0软件统计分析，建立根据牙齿钙化程度推断年龄的方程；采用拟合优度检验、模型方差分析、回归系数检验和共线性诊断、残差分析对方程的合理性进行检验及盲测。结果下颌同名牙间钙化分级评分值无统计学差异（P〉0．05），而下颌同名牙性别间钙化评分值在部分年龄组存在差异（P〈0．05）；下颌恒牙的钙化程度与年龄相关系数r均大于0．7；所建方程模型调整决定系数均大于0．8，估计值标准误男性为0．92岁至1．04岁、女性为0．92岁至1．00岁；推测年龄与真实年龄的平均误差男性为0．433±0．288岁、女性为0．502±0．297岁。结论本研究建立的方法在推断相关地区、相关年龄段人群的年龄推断中有较好的应用前景。

A study on low mandibula dental age of Chinese Han nationality adolescents age from 6 to 15 years old in Anyang of Henan province

Objective This study was to set up methods for estimating age by studying the low mandibula between the degree of dental calcification and age with orthopantomographs.Methods According to the standard to grade the degree of low mandibular dental calcification showing in the digital orthopantomogram belonging to 1575(male 900,female 675) samples aged 6～15 years old,then we input the figure to SPSS 13.0 to do statistics analysis and set up the equation for age estimation,finally to do blind test based on 120 samples.Results There were no significant statistic differences in dental calcification degree between homonymic teeth,but there were statistic differences between gender;furthermore,there was a perfect relation between chronological age and dental calcification,the mean error of blind test was 0.433±0.288 year for male and 0.502±0.297 year for female.Conclusion The methods set up in this study would have a perfect foreground in age estimation for Chinese Han nationality adolescents and youths aged from 6 to 15 years old in forensic science.