Real-time detection of dental calculus by blue-LED-induced fluorescence spectroscopy

Yue, Qin; Luan, X.L.; Bi, Liangjia; Zhilin, Lu; Sheng, Yanru; Somesfalean, Gabriel; Zhou, Chunhui; Zhang, Z.G.

doi:10.1016/j.jphotobiol.2007.03.002

Cited by 39 publications

(26 citation statements)

References 34 publications

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“…50 Fluorescence detection is a noncontact, nondestructive probing technique which has received increasing attention due to its high sensitivity and specificity. 51 In this section, fluorescence emitted by specific wavelength light of sound and caries tooth structures and dental calculus and the application of this property to the clinical application for the diagnosis of dental caries and the determination of the extent of surgical removal of caries-affected tooth tissue was considered. For caries diagnosis, wavelength-dependent fluorescence properties are used instead of fluorescent emission under ambient lights that contain UV light.…”

Section: Wavelength-dependent Fluorescence Of Teethmentioning

confidence: 99%

“…63 Successful periodontal therapy requires sensitive techniques to discriminate dental calculus from healthy teeth. 51 Therefore, the possibility of detecting subgingival calculus should be evaluated to control complete calculus removal after scaling and root planing. 64 In 1953, it was noted that dental calculus on teeth surfaces showed reddish-orange fluorescence under the UV light.…”

Section: Fluorescence Of Dental Calculusmentioning

confidence: 99%

“…The results indicated that this method enabled cost-effective and reliable calculus detection, and can be further developed for imaging applications. 51 A fluorescence-based procedure to enable real-time detection and quantification of dental calculus was developed. 51 …”

Section: Fluorescence Of Dental Calculusmentioning

confidence: 99%

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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: Wavelength-dependent Fluorescence Of Teethmentioning

confidence: 99%

Section: Fluorescence Of Dental Calculusmentioning

confidence: 99%

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Fluorescence properties of human teeth and dental calculus for clinical applications

Lee¹

2015

J. Biomed. Opt

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“…6) supports the interpretation of the blue-light microscope images of a photobleached calculus surface after laser irradiation. The absence of the porphyrin Soret band 29,32,33 in the fluorescence spectrum of photobleached calculus [ Fig. 6(d)] between 615 and 725 nm shows that endogenous porphyrins (e.g., protoporphyrin IX and coporphyrin) in oral bacteria (e.g., Prevotella intermedia, Prevotella nigrescens, and Prevotella melaninogenica) are the primary Trend lines through data are from a linear regression.…”

Section: Discussionmentioning

confidence: 99%

Pulsed laser ablation of dental calculus in the near ultraviolet

2014

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Abstract. Pulsed lasers emitting wavelengths near 400 nm can selectively ablate dental calculus without damaging underlying and surrounding sound dental hard tissue. Our results indicate that calculus ablation at this wavelength relies on the absorption of porphyrins endogenous to oral bacteria commonly found in calculus. Suband supragingival calculus on extracted human teeth, irradiated with 400-nm, 60-ns laser pulses at ≤8 J∕cm 2 , exhibits a photobleached surface layer. Blue-light microscopy indicates this layer highly scatters 400-nm photons, whereas fluorescence spectroscopy indicates that bacterial porphyrins are permanently photobleached. A modified blow-off model for ablation is proposed that is based upon these observations and also reproduces our calculus ablation rates measured from laser profilometry. Tissue scattering and a stratified layering of absorbers within the calculus medium explain the gradual decrease in ablation rate from successive pulses. Depending on the calculus thickness, ablation stalling may occur at <5 J∕cm 2 but has not been observed above this fluence.

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“…Detection of dental calculus by ultraviolet excitation has the reliability of distinguishing calculus from a healthy and unaffected tooth surface. 9 Although autofluorescence detection has recently become an alternative method to detect subgingival calculus, the precision and accuracy are still questionable. 10 The examination usually suffers from shallow penetration depth, especially when it is used in the detection of subgingival calculus.…”

Section: Introductionmentioning

confidence: 99%

Characteristics of subgingival calculus detection by multiphoton fluorescence microscopy

Tung

Lee²,

Lai

et al. 2011

J. Biomed. Opt.

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Abstract. Subgingival calculus has been recognized as a major cause of periodontitis, which is one of the main chronic infectious diseases of oral cavities and a principal cause of tooth loss in humans. Bacteria deposited in subgingival calculus or plaque cause gingival inflammation, function deterioration, and then periodontitis. However, subgingival calculus within the periodontal pocket is a complicated and potentially delicate structure to be detected with current dental armamentaria, namely dental x-rays and dental probes. Consequently, complete removal of subgingival calculus remains a challenge to periodontal therapies. In this study, the detection of subgingival calculus employing a multiphoton autofluorescence imaging method was characterized in comparison with a one-photon confocal fluorescence imaging technique. Feasibility of such a system was studied based on fluorescence response of gingiva, healthy teeth, and calculus with and without gingiva covered. The multiphoton fluorescence technology perceived the tissue-covered subgingival calculus that cannot be observed by the onephoton confocal fluorescence method. C 2011 Society of Photo-Optical Instrumentation Engineers (SPIE).

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Real-time detection of dental calculus by blue-LED-induced fluorescence spectroscopy

Cited by 39 publications

References 34 publications

Fluorescence properties of human teeth and dental calculus for clinical applications

Fluorescence properties of human teeth and dental calculus for clinical applications

Pulsed laser ablation of dental calculus in the near ultraviolet

Characteristics of subgingival calculus detection by multiphoton fluorescence microscopy

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