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

被引：17

作者：

Kiran, Ramya ^{[1
]}

Walsh, Laurence J. ^{[4
]}

Forrest, Alexander ^{[2
]}

Tennant, Marc ^{[3
]}

Chapman, James ^{[1
]}

机构：

[1] Cent Queensland Univ, Sch Hlth Med & Appl Sci, Rockhampton, Qld 4701, Australia

[2] Griffith Univ, Sch Nat Sci, Nathan Campus,170 Kessels Rd, Griffith, NSW 4111, Australia

[3] Univ Western Australia, Sch Anat Physiol & Human Biol, Int Res Collaborat Oral Hlth & Equ, 35 Stirling Highway, Crawley 6009, Australia

[4] Univ Queensland, UQ Oral Hlth Ctr, Sch Dent, 288 Herston Rd, Herston, Qld 4006, Australia

来源：

FORENSIC SCIENCE INTERNATIONAL | 2017年 / 273卷

关键词：

Fluorescence; Photography; Composite; Ceramics; LED lights; UV light; RESIN COMPOSITES;

D O I：

10.1016/j.forsciint.2017.01.022

中图分类号：

DF [法律]; D9 [法律]; R [医药、卫生];

学科分类号：

0301 ; 10 ;

摘要：

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 (TM) 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 (TM), 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. (C) 2017 Elsevier B.V. All rights reserved.

引用

页码：20 / 28

页数：9

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