Effect of Heat on the Fluorescence Properties of Tooth-Colored Restorative Materials and Their Forensic Implications.

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°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°C, and at 500°C underwent major color changes due to volatilization of resin. Materials containing inorganic fluorophores still fluoresced at 900°C, while at 1200°C, none of the materials tested in this study showed any fluorescence. PMID: 31674673 [PubMed - in process]
Source: Journal of Forensic Sciences - Category: Forensic Medicine Authors: Tags: J Forensic Sci Source Type: research