Forensic applications: fluorescence properties of tooth-coloured restorative materials using a fluorescence DSLR camera

Kiran, Ramya, Walsh, Laurence J., Forrest, Alexander, Tennant, Marc and Chapman, James (2017) Forensic applications: fluorescence properties of tooth-coloured restorative materials using a fluorescence DSLR camera. Forensic Science International, 273 20-28. doi:10.1016/j.forsciint.2017.01.022

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Author Kiran, Ramya
Walsh, Laurence J.
Forrest, Alexander
Tennant, Marc
Chapman, James
Title Forensic applications: fluorescence properties of tooth-coloured restorative materials using a fluorescence DSLR camera
Journal name Forensic Science International   Check publisher's open access policy
ISSN 1872-6283
0379-0738
Publication date 2017-04-01
Sub-type Article (original research)
DOI 10.1016/j.forsciint.2017.01.022
Open Access Status File (Author Post-print)
Volume 273
Start page 20
End page 28
Total pages 9
Place of publication E Park, Shannon, Clare Ireland
Publisher Elsevier Ireland
Language eng
Subject 2734 Pathology and Forensic Medicine
Abstract The objective of this study was to compare the fluorescence properties of dry and wet samples of contemporary tooth-coloured restorative materials using a fluorescence based DSLR camera and a variety of LEDs emitting different wavelengths of visible light as excitation sources. The materials examined included resin composites; ceramics and hybrid restorative materials such as ormocers, Vita Enamic™ and resin reinforced glass-ionomer cements. The levels of fluorescence for each sample under different combinations of incident light wavelengths and filters was analysed by using histogram data for colour channels from Adobe Photoshop software. Fluorescence patterns were influenced by water sorption of the materials. UV-A/Violet light (405± nm) produced the greatest range of luminosity values (10–204) amongst the tooth-coloured restorative materials, and showed the greatest differences between restorations and tooth structure. The best filter combinations with violet light were orange or yellow filters. Under ultraviolet excitation, Fuji VIII A2 exhibited a unique bright pink fluorescence emission, while VitaEnamic™, ormocer and glass-ionomer cements emitted bluish-pink fluorescence emissions. In conclusion, restorative materials exhibited varied emission pattern under UV-A (405 nm) light, which enables their detection and differentiation from natural tooth structure.
Keyword Ceramics
Composite
Fluorescence
LED lights
Photography
UV light
Q-Index Code C1
Q-Index Status Provisional Code
Grant ID 83-2015
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: HERDC Pre-Audit
School of Dentistry Publications
 
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