东莞市15～22岁男性青少年牙齿钙化及其法医学意义  

Dental calcification of 15-22 years old male in Dongguan city and its forensic significance

作　　者：卢玫瑰[1] 赖小平[1] 谭琦瑄[2] 丁镇丰[1] 邓敏[1] 梁彩萍[1] 陈驰[1] 吴灿[1] 钟建玲[1] 何鑫耀[1] 

机构地区：[1]广东医学院法医学教研室,广东东莞523808 [2]东莞东华医院放射科,广东东莞523110

出　　处：《中国法医学杂志》2013年第4期310-314,共5页Chinese Journal of Forensic Medicine

基　　金：2008年东莞市高等院校科技计划资助项目(2008108101052);2010年广东省大学生创新实验项目(KY1002)

摘　　要：目的调查东莞市15～22岁男性青少年牙齿钙化情况,为法医年龄推断提供新的基础数据。方法拍摄310名东莞市15～22岁男性青少年全口曲面断层片,参照田雪梅牙齿钙化分级评分标准,分别对下颌第1-7恒牙及上下颌第三磨牙钙化程度进行评分。利用SPSS 17.0进行配对样本T检验、与年龄的相关性分析及Fisher's两类判别分析。结果下颌第1-7恒牙在16.5岁均已发育完全,第三磨牙从16岁开始出现8级钙化,上、下颌第三磨牙分别从17.5岁及18岁开始出现9级钙化;上颌第三磨牙间钙化程度存在差异(P<0.01),下颌左右侧同名牙齿钙化无差异(P>0.05);第三磨牙与年龄的Spearman相关系数为0.5～0.64,根据第二、三磨牙发育建立的16、17、18岁Fisher's线性两类判别综合判别率分别为84.8%、75.2%、73.1%。结论第1-7恒牙对17岁以上青少年的年龄推断有局限性,第三磨牙与年龄之间呈中度相关,需综合机体其他年龄特征进行年龄判别。Objective To provide new evidences for age estimation,dental calcification of 15~22years old male in Dongguan city were investigated.Methods The 310 samples of orthopantomograms were collected from 15-22 years old male in Dongguan city,China,and the dental calcification was estimated according to the standard established by Tian Xumei.Paired-Samples T test,Spearman correlation analysis and Fisher＇s discriminant analysis were performed by using SPSS 17.0.Results The 1-7 permanent mandibular teeth of the 16.5 years old male were fully developed.The calcification of grade 8 of the third molar began at the age of 16 and the calcification of grade 9 of the upper third molar and lower third molar began at 17.5 and 18 years old respectively.There was statistic difference between the calcification of the upper third molars（P 0.01） but no statistic difference between the lower homonymic teeth（P 0.05）.The Spearman correlation coefficient between the age and the third molar calcification was 0.5-0.64.The discriminatory functions were established on the development of second and third molars in order to distinguish the age of 16,17 or 18 years and the discriminant rate were 84.8%,75.2%,and 73.1% respectively.Conclusion There was a limitation to distinguish the age of over 17 years old according the dental calcification.Other age features should be considered with dental calcification for age estimation.

关 键 词：法医人类学 牙龄 牙齿钙化 第三磨牙 年龄推断 

分 类 号：D919[医药卫生—法医学]