A clinically applicable laser luminescence method for the early detection of dental caries

Bjelkhagen, Hans I.; Sundström, F

doi:10.1109/jqe.1981.1071024

Cited by 28 publications

(15 citation statements)

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“…In the 1980s, a clinically applicable visual detection 33,34 method focussing on the natural green fl uorescence of tooth tissue was developed. The technique used a 488 nm excitation wavelength from an argon-ion laser to discriminate bright green fl uorescing healthy tooth tissue from poorly fl uorescing caries lesions.…”

Section: Caries Detectionmentioning

confidence: 99%

Low-level laser use in dentistry

Parker

2007

Br Dent J

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Section: Caries Detectionmentioning

confidence: 99%

Low-level laser use in dentistry

Parker

2007

Br Dent J

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“…The quantitative light-induced fluorescence (QLF) method has been tested in several in vitro [Bjelkhagen and Sundström, 1981;Bjelkhagen et al, 1982;Hafström-Björkman et al, 1992;Emami et al, 1996;Al-Khateeb et al, 1997a], in situ [Al-Khateeb et al, 1997b] and in vivo studies [de Josselin de Jong et al, 1995;Al-Khateeb et al, 1998a;Tranaeus et al, 1999Ferreira Zandoná et al, 2000] for smooth surface Tranaeus/Shi/Lindgren/Trollsås/ Angmar-Månsson caries lesions. The possibility of adapting the QLF method for occlusal caries diagnosis is under investigation [Tranaeus et al, unpubl.…”

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confidence: 99%

In vivo Repeatability and Reproducibility of the Quantitative Light-Induced Fluorescence Method

et al. 2002

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In vivo repeatability and reproducibility of the quantitative light-induced fluorescence (QLF) method were tested with respect to three variables: lesion area, and average and maximum changes in lesion fluorescence. To test the image-capturing stages, three analysts each captured images of 15 incipient smooth surface lesions in vivo, and the images were analysed by one of the analysts. To test the analytical stage of the method, three analysts analysed the images of 15 in vivo incipient smooth surface lesions. For the image-capturing stage, inter-examiner reliability showed an intra-class correlation coefficient (r) between 0.95 and 0.98. For the analytical stage, intra-examiner reliability for all three analysts showed a value of r between 0.93 and 0.99. Inter-examiner reliability showed a value of r between 0.95 and 0.99. It was concluded that the in vivo repeatability and reproducibility of the QLF method are excellent.

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“…The same is found when fluorescence images from a tooth with a white-spot lesion are compared with white light scattering images of the same tooth [Bjelkhagen et al, 1981[Bjelkhagen et al, , 1982.…”

Section: Discussionmentioning

confidence: 66%

“…Light-induced fluorescence (LF) was first introduced in the early 1980s [Bjelkhagen and Sundström, 1981;Bjelkhagen et al, 1982;Sundström et al, 1985] as a promising optical technique enhancing the visibility of early enamel caries. LF imaging of teeth is based on the dark appearance of a white spot in otherwise bright fluorescent enamel [Hafström-Björkman et al, 1992].…”

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A Monte Carlo Simulation of the Influence of Sound Enamel Scattering Coefficient on Lesion Visibility in Light-Induced Fluorescence

Veen

Ando²,

Stookey³

et al. 2002

Caries Res

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Quantitative light-induced fluorescence (QLF) is based on the dark appearance of a white spot in otherwise highly fluorescent enamel. This can be explained by the increased scattering coefficient in the white spot compared with that of sound enamel. The aim of this study was to estimate the effect of different sound enamel scattering coefficients (s_SE) and enamel thickness d, caused by developmental enamel differences, on the fluorescence appearance of white-spot lesions. We ran a Monte Carlo simulation of a 4 × 4 mm² illuminated enamel slab on a highly fluorescent background. The slab had a 0.7 × 0.7 mm², 100-µm-deep, white spot in the center. Fluorescent and back-scattered photons re-emitted from the central 2 × 2 mm² were recorded. We found that the fluorescence photon excitance from the white spot (F_WS) was less than that of sound enamel (F_SE), with an optimum difference for S_SE between 20 and 80/mm. For s_SE <20/mm, both F_SE and F_WS decreased with d. We found no relation with d for s_SE >20/mm. The results indicate that for small s_SE, we are suffering from edge losses, which explains why the optimum for lesion visibility is not found at s_SE = 0/mm, as would be expected.

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A clinically applicable laser luminescence method for the early detection of dental caries

Cited by 28 publications

References 0 publications

Low-level laser use in dentistry

Low-level laser use in dentistry

In vivo Repeatability and Reproducibility of the Quantitative Light-Induced Fluorescence Method

A Monte Carlo Simulation of the Influence of Sound Enamel Scattering Coefficient on Lesion Visibility in Light-Induced Fluorescence

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