Pol Chetan A, Ghige Suvarna K, Gosavi Suchitra R, Hazarey Vinay K
Department of Oral Pathology and Microbiology, Government Dental College and Hospital, Nagpur, Maharashtra, India.
J Forensic Dent Sci. 2015 May-Aug;7(2):148-52. doi: 10.4103/0975-1475.154591.
Heat-induced alterations to dental and restorative materials can be of great interest to forensic dentistry. Knowing the specific optical behavior of dental materials can be of high importance as recognition of changes induced by high temperatures can lead to the determination of material which was used in a dental restoration, facilitating identification of burned human remains.
To observe the effects of predetermined temperatures (200°C-400°C-600°C-800°C-1000°C) on unrestored teeth and different restorative materials macroscopically and then examine them under a stereomicroscope for the purpose of identification.
The study was conducted on 375 extracted teeth which were divided into five groups of 75 teeth each as follows: group 1- unrestored teeth, group 2- teeth restored with all-ceramic crowns, Group 3- with class I silver amalgam filling, group 4- with class I composite restoration, and group 5- with class I glass ionomer cement restoration.
Unrestored and restored teeth display a series of specific macroscopic & stereomicroscopic structural changes for each range of temperature.
Dental tissues and restorative materials undergo a series of changes which correlate well with the various temperatures to which they were exposed. These changes are a consequence of the nature of the materials and their physicochemical characteristics.
热致牙科及修复材料的变化对法医牙科学具有重要意义。了解牙科材料的特定光学行为至关重要，因为识别高温引起的变化可有助于确定牙科修复中使用的材料，从而便于识别烧焦的人体遗骸。
宏观观察预定温度（200°C - 400°C - 600°C - 800°C - 1000°C）对未修复牙齿和不同修复材料的影响，然后在体视显微镜下进行检查以进行识别。
对375颗拔除的牙齿进行研究，将其分为五组，每组75颗牙齿，如下：第1组 - 未修复牙齿，第2组 - 全瓷冠修复的牙齿，第3组 - I类银汞合金充填，第4组 - I类复合树脂修复，第5组 - I类玻璃离子水门汀修复。
未修复和修复的牙齿在每个温度范围内均表现出一系列特定的宏观和体视显微镜下的结构变化。
牙科组织和修复材料会发生一系列变化，这些变化与它们所暴露的各种温度密切相关。这些变化是材料性质及其物理化学特性的结果。
