Effects of elevated temperatures on various restorative materials: an in vitro study.
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.
Bose
Raison S
RS
Department of Conservative Dentistry and Endodontics, Saveetha Dental College and Hospitals, Chennai. bose_raison@yahoo.com
Mohan
B
B
Lakshminarayanan
L
L
D000180:Acrylic Resins / Q000737:chemistry; D002516:Ceramics / Q000737:chemistry; D003116:Color; D003188:Composite Resins / Q000737:chemistry; D003442:Crowns; D003723:Dental Amalgam / Q000737:chemistry; D003739:Dental Cementum / Q000473:pathology; D003743:Dental Enamel / Q000473:pathology; D003764:Dental Materials / Q000737:chemistry*; D003776:Dental Porcelain / Q000737:chemistry; D003793:Dental Restoration, Permanent; D003801:Dental Veneers; D003804:Dentin / Q000473:pathology; D005899:Glass Ionomer Cements / Q000737:chemistry; D006358:Hot Temperature; D006801:Humans; D016876:Metal Ceramic Alloys / Q000737:chemistry; D013499:Surface Properties; D019228:Tooth Crown / Q000473:pathology; D014092:Tooth Root / Q000473:pathology; D015036:Zinc Phosphate Cement / Q000737:chemistry
D000180:Acrylic Resins; D003188:Composite Resins; D003764:Dental Materials; D005899:Glass Ionomer Cements; D016876:Metal Ceramic Alloys; D003776:Dental Porcelain; D015036:Zinc Phosphate Cement; D003723:Dental Amalgam