Bagdey Shubhangi P, Moharil Rohit Balwant, Dive Alka M, Thakur Samantha, Bodhade Ashish, Dhobley Akshay A
Department of Oral and Maxillofacial Pathology, Vidya Shikshan Prasarak Mandal's Dental College and Research Centre, Nagpur, Maharashtra, India.
J Forensic Dent Sci. 2014 Jan;6(1):62-6. doi: 10.4103/0975-1475.127777.
In large scale disasters associated with fire the damage caused by heat can make medico legal identification of human remains difficult. Teeth, restorations, and prostheses all of which are resistant to quite high temperatures and can be used as aids in identification process.
Aim of the study was to investigate the macroscopic and microscopic changes of teeth and several dental filling materials exposed to a range of high temperature (200-800°C). Dental restorations include filling materials, crown, and bridges.
Restored and unrestored teeth were placed in a furnace and heated at a rate of 30°C/min and the effects of the predetermined temperatures 200, 400, 600, and 800°C were observed. Macroscopic and stereo microscope findings were observed.
Our results showed that teeth and restorative materials resist higher temperatures than theoretically predicted and that even when a restoration is lost because of detachment or change of state, its ante-mortem presence can be confirmed and detected by stereo microscopic examination of the residual cavity.
We further conclude that a reasonably reliable estimation of the temperature of exposure can be made from an analysis of the teeth and restorative materials.
在与火灾相关的大规模灾难中，高温造成的损害会使对人类遗骸进行法医鉴定变得困难。牙齿、修复体和假体都能耐受相当高的温度，可用于辅助鉴定过程。
本研究的目的是调查牙齿及几种牙科填充材料在一系列高温（200 - 800°C）下的宏观和微观变化。牙科修复体包括填充材料、牙冠和牙桥。
将有修复体和无修复体的牙齿放入炉中，以每分钟30°C的速度加热，并观察200、400、600和800°C这几个预定温度的影响。观察宏观和体视显微镜下的结果。
我们的结果表明，牙齿和修复材料耐受的温度高于理论预测，并且即使修复体因脱离或状态改变而丢失，其生前存在情况也可通过对残留窝洞的体视显微镜检查得到确认和检测。
我们进一步得出结论，通过对牙齿和修复材料的分析，可以对暴露温度进行合理可靠的估计。
