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J Forensic Sci

Title:		Effect of Heat on the Fluorescence Properties of Tooth-Colored Restorative Materials and Their Forensic Implications
Author(s):		Kiran R; Chapman J; Tennant M; Forrest A; Walsh LJ;
Address:		"School of Health, Medical and Applied Sciences, Central Queensland University, Bruce Highway, Rockhampton, 4701, Queensland, Australia. School of Science, RMIT University, GPO Box 2476, Melbourne, Victoria, Australia. International Research Collaborative, Oral Health and Equity, School of Human Sciences, The University of Western Australia, 35 Stirling Highway, Crawley, 6009, Western Australia, Australia. UQ Oral Health Centre, The University of Queensland School of Dentistry, 288 Herston Road, Herston, 4006, Australia"
Journal Title:		J Forensic Sci
Year:		2019
Volume:		20190710
Issue:		6
Page Number:		1698 - 1706
DOI:		10.1111/1556-4029.14122
ISSN/ISBN:		1556-4029 (Electronic) 0022-1198 (Linking)
Abstract:		"During antemortem and postmortem comparison of dental records of carbonized victims, restorations may be part of such records. The objective of this study was to evaluate the effect of heat on the fluorescence behavior of contemporary tooth-colored restorative materials and natural tooth structure when subjected to range of temperatures, using illumination with 405 nm wavelength light. A total of 132 human extracted teeth restored with tooth-colored restorative materials were exposed to heat (200, 500, 900, 1200 degrees C) in an oven for 30 min. Samples were imaged before and after heat treatment. All tooth-colored restorative materials underwent changes in color and in fluorescence properties, at each of the temperatures used. Resin-based restorative materials still fluoresced at 200 degrees C, and at 500 degrees C underwent major color changes due to volatilization of resin. Materials containing inorganic fluorophores still fluoresced at 900 degrees C, while at 1200 degrees C, none of the materials tested in this study showed any fluorescence"
Keywords:		"Aluminum Silicates Color Composite Resins *Dental Materials Dental Porcelain *Dental Restoration, Permanent *Fluorescence Forensic Dentistry Glass Ionomer Cements *Hot Temperature Humans Organically Modified Ceramics Potassium Compounds fluorescence foren;"
Notes:		"MedlineKiran, Ramya Chapman, James Tennant, Marc Forrest, Alexander Walsh, Laurence J eng 2019/11/02 J Forensic Sci. 2019 Nov; 64(6):1698-1706. doi: 10.1111/1556-4029.14122. Epub 2019 Jul 10"