Fluorescence characteristics of sound and carious human dentine preparations

Armstrong, W.G.

doi:10.1016/0003-9969(63)90045-1

Cited by 40 publications

(16 citation statements)

References 9 publications

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“…The maximum dentin fluorescence emission recorded also corresponded with the earliest excellent contributions by Laurila et al 43) and Armstrong 44) analyzing this issue in the 1960s. In spite of the fact that the amount of studied biological samples of dental hard tissue was small -as this analysis was not the main aim of the study-and that the achieved results may only represent a rough estimate of the average human enamel and dentin fluorescence properties, the significant concordance of the results with previous research validates the presented data.…”

Section: Discussionsupporting

confidence: 74%

Fluorescence properties of commercial composite resin restorative materials in dentistry

Meller¹,

Klein²

2012

Dent. Mater. J.

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The objective was to assess the fluorescence properties of current commercial resin composites. Sixteen light-curing resin composites, representing a total number of 241 shades, were analyzed. Fluorescence measurements of all samples were taken using the monochromator-based fluorescence reader Synergy TM Mx (BioTek Instruments Inc.). Additionally, samples of dentin and enamel were analyzed for comparison. The mean of the maximum excitation wavelength was (398±5) nm and the mean of the resulting emission wavelength was (452±9) nm for all composite shades. The maximum fluorescence varied widely between 50 and 70,808 RFU with a mean of (28,948±15,380) RFU. The maximum for dentin was (9,308±3,676) RFU and enamel (5,467±506) RFU. The results showed that the analyzed composites fluoresced at nearly the same excitation-emission wavelengths combination but with varying optical intensities. These results provide useful reference for optimal fluorescence induction and may help to develop better fluorescence diagnostic methods needed for treatment, forensic investigations and epidemiological research/analyses.

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Section: Discussionsupporting

confidence: 74%

Fluorescence properties of commercial composite resin restorative materials in dentistry

Meller¹,

Klein²

2012

Dent. Mater. J.

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“…On the other hand, under optimal excitation and emission conditions, visible red fl uorescence is probably a good indicator of the presence and activity of bacteria in dentin caries. The use of bacterial green fl uorescence for caries detection would be diffi cult because of the intense green background fl uorescence of dental hard tissues [Stübel, 1911;Kvaal and Solheim, 1989;Armstrong, 1963]. The results of the present study are limited in that they were found in vitro; the fl uorescence properties of oral microorganisms still need to be investigated in the clinical situation.…”

Section: Discussionmentioning

confidence: 65%

The Ability of Selected Oral Microorganisms to Emit Red Fluorescence

et al. 2005

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Some novel caries detection and excavation devices rely on the ability of bacteria to produce red fluorescing compounds. The aim of this study was to examine the ability of selected oral microorganisms to emit red fluorescence. Streptococcus mutans, S. oralis, S. salivarius, S. sobrinus, Lactobacillus fermentans, L. casei, L. rhamnosus, Actinomyces naeslundi, A. israelii, Prevotella intermedia, and Fusobacterium nucleatum were inoculated onto Columbia agar with haemin and vitamin K and incubated anaerobically for up to 7 days in the dark. The resulting bacterial colonies were excited using filtered xenon light (405 ± 20 nm) and digitally photographed through a 530-nm high-pass filter. The red and green portions of the colony fluorescence were analyzed using a computer program and the red/green ratio was calculated. All colonies emitted both red and green fluorescence. The green outweighed the red portion for the following species (in descending order) S. oralis, S. salivarius, S. mutans, F. nucleatum and S. sobrinus. The red portion was higher for the following species (in descending order) P. intermedia, A. naeslundi, A. israelii, L. fermentans, L. rhamnosus and L. casei. With all the bacteria examined, one color portion generally outweighed the other, giving the visual impression of either red or green fluorescence. We conclude that red fluorescence is well suited to detection of the bacteria which cause dentin caries but it is not suitable as an indicator of the presence and activity of the streptococci involved in initial caries.

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“…The fluorescent properties of tooth enamel, cementum and dentin are well known [27][28][29][30][31][32][33][34][35][36][37][38][39][40] and have been the focus of detailed studies in efforts to leverage these as non invasive diagnostics for caries. [41][42][43] The fluorescence of enamel and dentin are generally a nuisance in Raman spectroscopic applications as the intensity of emitted fluorescence can ruin resolution of spectral bands in analysis.…”

Section: Discussionmentioning

confidence: 99%