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热诱导改变后牙髓治疗牙的法医鉴定:一项体外研究。

Forensic Identification of Endodontically Treated Teeth after Heat-Induced Alterations: An In Vitro Study.

机构信息

Department of Conservative Dentistry and Endodontics, Karnavati School of Dentistry, Gujarat, India.

Department of Forensic Odontology, School of Forensic Science, National Forensic Sciences University, Gujarat, India.

出版信息

Eur Endod J. 2020 Dec;5(3):271-276. doi: 10.14744/eej.2020.37450.

Abstract

OBJECTIVE

The study aimed to highlight the relationship between forensic science and endodontics by illustrating CBCT records can be used as legal evidence for forensic analysis and evaluate the effect of elevated temperature on the endodontically treated teeth.

METHODS

The present study was conducted on 40 extracted permanent mandibular premolars, which were divided into two groups based on predetermined incineration temperature: Group I - 400°C & Group II - 800°C subjected for 15 minutes holding time in a digital burnout furnace. The root canal treatment was performed for both the groups and a Pre-incineration CBCT scan was taken for both the groups as an ante-mortem data. Following heating analysis, root canal treated teeth were examined using a stereomicroscope at 20x resolution to evaluate the morphological changes. The post-incineration CBCT scan was taken as the post-mortem record for each group. Both ante-mortem records and post-mortem records were compared for the forensic analysis.

RESULTS

The endodontically treated teeth display a series of macroscopic and stereo-microscopic changes for each temperature scale. The CBCT records identify the thermal stress-induced 3D alterations in the gutta-percha filled teeth.

CONCLUSION

Knowledge of changes in human dentition and traces of the endodontically treated teeth can help forensic experts for the identification of the fire victims.

摘要

目的

本研究旨在通过说明 CBCT 记录可作为法医分析的法律证据,并评估高温对牙髓治疗牙齿的影响,来强调法医学与牙髓学之间的关系。

方法

本研究共纳入 40 颗下颌前磨牙,根据预定的焚烧温度将其分为两组:I 组-400°C 和 II 组-800°C,在数字焚化炉中保持 15 分钟。对两组均进行根管治疗,并对每组进行预焚烧 CBCT 扫描作为生前数据。加热分析后,使用立体显微镜在 20x 分辨率下检查根管治疗后的牙齿,以评估形态变化。对每组进行焚烧后 CBCT 扫描作为死后记录。对生前记录和死后记录进行法医分析比较。

结果

牙髓治疗后的牙齿在每个温度范围内均表现出一系列宏观和立体显微镜下的变化。CBCT 记录可识别热应力引起的牙胶填充牙齿的 3D 改变。

结论

了解人类牙列的变化和牙髓治疗牙齿的痕迹可以帮助法医专家识别火灾受害者。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/2bdb/7881380/99e65be47ee8/EEJ-5-271-g001.jpg

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