Christopher Vineetha, Murthy Sarvani, Ashwinirani S R, Prasad Kulkarni, Girish Suragimath, Vinit Shashikanth Patil
Department of Stem Cell Laboratory, Narayana Nethralaya Foundation, Stem Cell Laboratory, Bommasandra, Bengaluru, India.
Department of Oral Pathology and Microbiology, Sri Hasanamba Dental College and Hospital, Hassan, Karnataka, India.
J Forensic Dent Sci. 2017 Jan-Apr;9(1):47. doi: 10.4103/jfo.jfds_24_16.
We know that teeth trouble us a lot when we are alive, but they last longer for thousands of years even after we are dead. Teeth being the strongest and resistant structure are the most significant tool in forensic investigations. Patterns of enamel rod end on the tooth surface are known as tooth prints.
This study is aimed to know whether these tooth prints can become a forensic tool in personal identification such as finger prints. A study has been targeted toward the same.
In the present study, acetate peel technique has been used to obtain the replica of enamel rod end patterns.
Tooth prints of upper first premolars were recorded from 80 individuals after acid etching using cellulose acetate strips. Then, digital images of the tooth prints obtained at two different intervals were subjected to biometric conversion using Verifinger standard software development kit version 6.5 software followed by the use of Automated Fingerprint Identification System (AFIS) software for comparison of the tooth prints. Similarly, each individual's finger prints were also recorded and were subjected to the same software.
Further, recordings of AFIS scores obtained from images were statistically analyzed using Cronbach's test.
We observed that comparing two tooth prints taken from an individual at two intervals exhibited similarity in many cases, with wavy pattern tooth print being the predominant type. However, the same prints showed dissimilarity when compared with other individuals. We also found that most of the individuals with whorl pattern finger print showed wavy pattern tooth print and few loop type fingerprints showed linear pattern of tooth prints.
Further more experiments on both tooth prints and finger prints are required in establishing an individual's identity.
我们知道，牙齿在我们活着的时候给我们带来很多困扰，但即使在我们死后，它们也能保存数千年之久。牙齿作为最坚固且具有抗性的结构，是法医调查中最重要的工具。牙齿表面釉柱末端的形态被称为牙印。
本研究旨在了解这些牙印是否能像指纹一样成为个人身份识别的法医工具。针对此开展了一项研究。
在本研究中，采用醋酸盐剥离技术获取釉柱末端形态的复制品。
使用醋酸纤维素条对80名个体的上颌第一前磨牙进行酸蚀后记录牙印。然后，使用Verifinger标准软件开发工具包6.5版软件对在两个不同时间段获取的牙印数字图像进行生物特征转换，随后使用自动指纹识别系统（AFIS）软件对牙印进行比较。同样，每个个体的指纹也被记录并使用相同软件进行处理。
此外，使用Cronbach检验对从图像中获得的AFIS分数记录进行统计分析。
我们观察到，在许多情况下，比较同一个体在两个不同时间段获取的两个牙印显示出相似性，其中波浪形牙印是主要类型。然而，与其他个体的牙印相比时，相同的牙印显示出差异。我们还发现，大多数具有涡纹型指纹的个体显示出波浪形牙印，少数箕型指纹显示出直线形牙印。
在确定个体身份方面，还需要对牙印和指纹进行更多实验。
