Red-shifted fluorescence of sound dental hard tissue

Zhang, Liang; Nelson, Leonard Y.; Seibel, Eric J.

doi:10.1117/1.3606572

Cited by 20 publications

(18 citation statements)

References 19 publications

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“…The latter phenomenon is used for the detection of dental caries and the identification of esthetic restorative materials that are in contact with teeth. [7][8][9] Fluorescence is a form of photoluminescence and is defined as the absorption of UV light (1 to 400 nm invisible light) by an object and its spontaneous emission in longer wavelengths (430 to 450 nm visible light). 1,10 Autofluorescence is the natural emission of light by biological structures when they absorb light and is used to distinguish the light emission originating from artificially added fluorescent markers (= fluorophores).…”

Section: Fluorescence Of Human Teeth and Its Variationmentioning

confidence: 99%

Fluorescence properties of human teeth and dental calculus for clinical applications

Lee¹

2015

J. Biomed. Opt

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Abstract. Fluorescent emission of human teeth and dental calculus is important for the esthetic rehabilitation of teeth, diagnosis of dental caries, and detection of dental calculus. The purposes of this review were to summarize the fluorescence and phosphorescence of human teeth by ambient ultraviolet (UV) light, to investigate the clinically relevant fluorescence measurement methods in dentistry, and to review the fluorescence of teeth and dental calculus by specific wavelength light. Dentine was three times more phosphorescent than enamel. When exposed to light sources containing UV components, the fluorescence of human teeth gives them the quality of vitality, and fluorescent emission with a peak of 440 nm is observed. Esthetic restorative materials should have fluorescence properties similar to those of natural teeth. Based on the fluorescence of teeth and restorative materials as determined with a spectrophotometer, a fluorescence parameter was defined. As to the fluorescence spectra by a specific wavelength, varied wavelengths were investigated for clinical applications, and several methods for the diagnosis of dental caries and the detection of dental calculus were developed. Since fluorescent properties of dental hard tissues have been used and would be expanded in diverse fields of clinical practice, these properties should be investigated further, embracing newly developed optical techniques.

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Section: Fluorescence Of Human Teeth and Its Variationmentioning

confidence: 99%

Fluorescence properties of human teeth and dental calculus for clinical applications

Lee¹

2015

J. Biomed. Opt

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“…It is this change in relative AF intensity that the dual laser technique detects. 10 Histology via PLM confirmed the presence of enamel demineralization in extracted specimens. The PLM technique involves cutting thin sections ∼250 μm in thickness from each specimen embedded in epoxy.…”

Section: Discussionmentioning

confidence: 99%

“…Figure 8 shows typical AF emission spectra recorded from a healthy (left) and diseased (right) tooth specimen in vivo, which matched the expected behavior of AF described in previous studies. 7,8,10 The AF spectrum from 405-nm excitation has a broad emission curve centered around 480 nm and gradually tapers off toward longer wavelengths. The 532-nm emission curve is similar in shape to the 405-nm emission curve.…”

Section: Resultsmentioning

confidence: 99%

“…More recently, we have developed a quantitative fluorescence spectroscopic technique that employs two laser wavelengths in order to quantitatively distinguish between sound and demineralized enamel. 9,10 In this study, we developed a multimodal clinical prototype device for testing in the clinic. The device allows the user to quickly and easily screen all teeth by first imaging using 405-nm reflectance, autofluorescence (AF), and bacterial fluorescence.…”

Section: Introductionmentioning

confidence: 99%

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Trimodal detection of early childhood caries using laser light scanning and fluorescence spectroscopy: clinical prototype

et al. 2013

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Abstract. There is currently a need for a safe and effective way to detect and diagnose early stages of childhood caries. A multimodal optical clinical prototype for diagnosing caries demineralization in vivo has been developed. The device can be used to quickly image and screen for any signs of demineralized enamel by obtaining highresolution and high-contrast surface images using a 405-nm laser as the illumination source, as well as obtaining autofluorescence and bacterial fluorescence images. When a suspicious region of demineralization is located, the device also performs dual laser fluorescence spectroscopy using 405-and 532-nm laser excitation. An autofluorescence ratio of the two excitation lasers is computed and used to quantitatively diagnose enamel health. The device was tested on five patients in vivo as well as on 28 extracted teeth with clinically diagnosed carious lesions. The device was able to provide detailed images that highlighted the lesions identified by the clinicians. The autofluorescence spectroscopic ratios obtained from the extracted teeth successfully quantitatively discriminated between sound and demineralized enamel.

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“…The peak of 405-nm AF is centered around 480 nm. 18 Finally, 635-nm backscattered light was collected in the red channel.…”

Section: Sfe Imaging Platformmentioning

confidence: 99%

Spectrally enhanced imaging of occlusal surfaces and artificial shallow enamel erosions with a scanning fiber endoscope

2012

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Red-shifted fluorescence of sound dental hard tissue

Cited by 20 publications

References 19 publications

Fluorescence properties of human teeth and dental calculus for clinical applications

Fluorescence properties of human teeth and dental calculus for clinical applications

Trimodal detection of early childhood caries using laser light scanning and fluorescence spectroscopy: clinical prototype

Spectrally enhanced imaging of occlusal surfaces and artificial shallow enamel erosions with a scanning fiber endoscope

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