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  • Title: Effects of elevated temperatures on various restorative materials: an in vitro study.
    Author: Bose RS, Mohan B, Lakshminarayanan L.
    Journal: Indian J Dent Res; 2005; 16(2):56-60. PubMed ID: 16372794.
    Abstract:
    In cases of mass disasters associated with fire, identification of the burnt victims can be a real challenge to the forensic team. Teeth and their restorations play a significant role to aid in the identification process, as various restorative materials have varying resistance to high temperatures. A study was undertaken to evaluate the changes taking place on teeth restored with amalgam, composites, glass ionomers, heat cure acrylic, and ceramics. The specimens were placed in a furnace and heated to predetermined temperatures of 200, 400, 600, 800, and 1000 degrees C and the changes were examined using a digital camera and stereomicroscope. Our observations show that while some restorations were able to withstand elevated temperatures, others were reduced to an unrecognizable mass at relatively low temperatures.
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