Blue and blue-violet diode lasers (450 and 405 nm) seem to represent an interesting approach for several clinical treatments today. The aim of this narrative review is to describe and comment on the literature regarding the utilization of blue and blue-violet lasers in dentistry. A search for "blue laser AND dentistry" was conducted using the PubMed database, and all the papers referring to this topic, ranging from 1990 to April 2020, were analyzed in the review. All the original and studies using 450 nm or 405 nm lasers were included in this study. All the articles on the LED light, laser wavelengths other than 405 and 450 nm and using lasers in specialties other than dentistry, as well as case reports, guideline papers and reviews were excluded. From a total of 519 results, 47 articles met the inclusion criteria and were divided into 8 groups based on their fields of application: disinfection (10), photobiomodulation (PBM) (4), bleaching (1), resin curing (20), surgery (7), periodontics (1), endodontics (1) and orthodontics (3). Blue and blue-violet diode lasers may represent new and effective devices to be used in a large number of applications in dentistry, even if further studies will be necessary to fully clarify the potentialities of these laser wavelengths.
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http://dx.doi.org/10.34172/jlms.2021.31 | DOI Listing |
RSC Adv
December 2024
Department of Chemistry, Faculty of Science, Tokyo University of Science 1-3 Kagurazaka Shinjyuku-ku Tokyo 162-8601 Japan
A novel photochromic system was discovered, in which leucomethylene blue, reduced by l-ascorbic acid, was irradiated with 405 nm visible light, resulting in the solution undergoing a colorless-to-blue transition. The process was then repeated, with the solution returning to its colorless state when left undisturbed. This photochromic reaction is sensitive enough to be driven by a blue-violet LED lamp and enables figures to be drawn in solution with a laser pointer.
View Article and Find Full Text PDFFood Chem X
October 2024
Technical University of Cluj Napoca, North University Center of Baia Mare, Victoriei Str. 76, Baia Mare, Romania.
Beads made of sodium alginate, whey protein concentrate, and red grape seed extract powder were exposed to white light and its red-orange, yellow-green-cyan, and cyan-blue-violet bands. The chemical analysis showed that encapsulation in the alginate-whey protein matrix protected polyphenols, flavonoids and cyanidin-3--glucoside when exposed to red-orange light. The reflectance spectra acquired from grape seed extract powder and grape seed extract beads were deconvoluted and anthocyanins-based moieties which contribute to the expression of bathochromic or hypsochromic effects were identified.
View Article and Find Full Text PDFAdv Mater
December 2024
Institute of Molecular Plus, Department of Chemistry and Haihe Laboratory of Sustainable Chemical Transformations, Key Laboratory of Organic Integrated Circuits, Ministry of Education, Tianjin University, Tianjin, 300072, China.
Organic photodiodes (OPDs) that utilize wavelength-selective absorbing molecules offer a direct approach to capturing specific wavelengths of light in multispectral sensors/imaging systems without filters. However, they exhibit broad response bandwidths, low external quantum efficiency (EQE), and often require compromises in two-component photoactive materials. Herein, the first utility of boron-nitrogen (BN) single-component photoabsorbers, leveraging a multi-resonance effect are introduced to attain OPDs with both record-high EQE of 33.
View Article and Find Full Text PDFJ Phys Chem Lett
December 2024
State Key Laboratory of Rare Earth Resource Utilization, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, P. R. China.
J Phys Condens Matter
December 2024
Department of Physics, Indian Institute of Technology (Indian School of Mines), Dhanbad 826004, India.
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