&lt;title&gt;Penetration parameters of low-intensity laser light in dental configurations for therapeutic applications&lt;/title&gt;

Uzunov, Ts.; Gizbreht, Alexander I.; Nenchev, Marin N.

doi:10.1117/12.262966

Cited by 6 publications

(6 citation statements)

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“…The normal enamel layer has a prism structure 40 with waveguide properties, and if one irradiates the tooth surface, the light will penetrate deeply. 41 When the tooth surface is etched, the structure of the enamel layer is changed and its waveguide properties disappear, so that the excitation light cannot penetrate as deeply as in the case of normally structured enamel. Therefore, the fluorescent signal obtained has lower intensity compared with sound tooth fluorescence.…”

Section: Discussionmentioning

confidence: 99%

Combining casein phosphopeptide-amorphous calcium phosphate with fluoride: synergistic remineralization potential of artificially demineralized enamel or not?

2009

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Recaldent is a product of casein phosphopeptide-amorphous calcium phosphate (CPP-ACP). The remineralizing potential of CPP-ACP per se, or when combined with 0.22% Fl gel on artificially demineralized enamel using laser florescence, is investigated. Mesial surfaces of 15 sound human molars are tested using a He-Cd laser beam at 441.5 nm with 18-mW power as an excitation source on a suitable setup based on a Spex 750-M monochromator provided with a photomultiplier tube (PMT) for detection of collected autofluorescence from sound enamel. Mesial surfaces are subjected to demineralization for ten days. The spectra from demineralized enamel are measured. Teeth are divided into three groups according to the remineralizing regimen: group 1 Recaldent per se, group 2 Recaldent combined with fluoride gel and ACP, and group 3 artificial saliva as a positive control. After following these protocols for three weeks, the spectra from the remineralized enamel are measured. The spectra of enamel autofluorescence are recorded and normalized to peak intensity at about 540 nm to compare spectra from sound, demineralized, and remineralized enamel surfaces. A slight red shift occurred in spectra from demineralized enamel, while a blue shift may occur in remineralized enamel. Group 2 shows the highest remineralizing potential. Combining fluoride and ACP with CPP-ACP can give a synergistic effect on enamel remineralization.

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Section: Discussionmentioning

confidence: 99%

Combining casein phosphopeptide-amorphous calcium phosphate with fluoride: synergistic remineralization potential of artificially demineralized enamel or not?

2009

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“…18 When the tooth surface is destructed, the prism structure of the enamel layer is damaged and its waveguide properties disappear so that the light cannot penetrate as deeply as in the case of normally structured enamel and the signal obtained has intensity decreased in comparison with sound tooth reflectance. 19 Lesions appear darker than sound enamel.…”

Section: Resultsmentioning

confidence: 98%

“…Enamel scattering coefficient is also reduced from short wavelength to long wavelength regions and its values are respectively µ s = 11 mm -1 at 543 nm, µ s = 6 mm -1 at 632 nm, µ s = 2 mm -1 at 1053 nm. [15][16][17][18] Enamel appears as semitransparent layer.…”

Section: Resultsmentioning

confidence: 99%

<title>Light diffuse reflectance for detection and differentiation of teeth caries lesions</title>

Borisova¹,

Uzunov

Valkanov

et al. 2007

SPIE Proceedings

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One of the goals of the contemporary dentistry is differentiation between carious stages that must be fast, non-invasive procedure, which will allow to the dentists to make reliable judgments. One suitable candidate for such method is reflectance spectroscopy. The objectives of current study are to determine the feasibility of applying the light reflectance spectroscopy technique for detection of different carious stages; therefore reflectance spectra of teeth illuminated at 450-900 nm light were recorded. There are obtained reflectance signals from the healthy enamel, dentine and different lesion stages of the investigated teeth. These spectra are compared to that, obtained by non-carious tooth lesions -fluorosa and odontolithiasis, resembling on initial carious stages. There is observed a significant decrease of the intensity of the reflected light in blue region in the case of caries. Reflectance signals, obtained from non-carious lesions also have significantly different character and could be used for differentiation between them and initial carious stages. An algorithm for differentiation between carious stages is proposed with diagnostic accuracy achieved up to 86,1% between precarious stage and sound tooth and 100% for determination of deep cavitation. Some comments about role of teeth enamel structure and anisotropy factor of dental layers on the results obtained are also made.

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“…Normal enamel is made up of enamel rods which have a prismatic structure and possess wave guide properties 20 . When a normal tooth is irradiated with a laser beam, exited light penetrates much deeper and the resultant fluorescence is greater 21 , but in carious tooth the wave guide properties are destroyed and reduce the penetration of the beam thereby reducing the fluorescence.…”

Section: Discussionmentioning

confidence: 98%

Does ozone enhance the remineralizing potential of nanohydroxyapatite on artificially demineralized enamel? A laser induced fluorescence study

Srinivasan

Prabhu

Chandra

et al. 2014

Lasers in Dentistry XX

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The present era of minimal invasive dentistry emphasizes the early detection and remineralization of initial enamel caries. Ozone has been shown to reverse the initial demineralization before the integrity of the enamel surface is lost. Nano-hydroxyapatite is a proven remineralizing agent for early enamel caries. In the present study, the effect of ozone in enhancing the remineralizing potential of nano-hydroxyapatite on artificially demineralized enamel was investigated using laser induced fluorescence. Thirty five sound human premolars were collected from healthy subjects undergoing orthodontic treatment. Fluorescence was recorded by exciting the mesial surfaces using 325 nm He-Cd laser with 2 mW power. Tooth specimens were subjected to demineralization to create initial enamel caries. Following which the specimens were divided into three groups, i.e ozone (ozonated water for 2 min), without ozone and artificial saliva. Remineralization regimen was followed for 3 weeks. The fluorescence spectra of the specimens were recorded from all the three experimental groups at baseline, after demineralization and remineralization. The average spectrum for each experimental group was used for statistical analysis. Fluorescence intensities of Ozone treated specimens following remineralization were higher than that of artificial saliva, and this difference was found to be statistically significant (P<0.0001). In a nutshell, ozone enhanced the remineralizing potential of nanohydroxyapatite, and laser induced fluorescence was found to be effective in assessing the surface mineral changes in enamel. Ozone can be considered an effective agent in reversing the initial enamel caries there by preventing the tooth from entering into the repetitive restorative cycle.

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<title>Penetration parameters of low-intensity laser light in dental configurations for therapeutic applications</title>

Cited by 6 publications

References 0 publications

Combining casein phosphopeptide-amorphous calcium phosphate with fluoride: synergistic remineralization potential of artificially demineralized enamel or not?

Combining casein phosphopeptide-amorphous calcium phosphate with fluoride: synergistic remineralization potential of artificially demineralized enamel or not?

<title>Light diffuse reflectance for detection and differentiation of teeth caries lesions</title>

Does ozone enhance the remineralizing potential of nanohydroxyapatite on artificially demineralized enamel? A laser induced fluorescence study

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