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https://www.readbyqxmd.com/read/28817127/ten-year-nonsurgical-periodontal-treatment-protocol-with-adjunctive-use-of-diode-laser-monitoring-clinical-outcomes-in-%C3%A2-6-mm-pockets-a-retrospective-controlled-case-series
#1
Marisa Roncati, Annalisa Roncati, Cinzia Barbieri, Paolo Vescovi
The clinical effects of treatment with 808- and 980-nm diode lasers as an adjunct to a uniform and consistent nonsurgical periodontal treatment protocol (NSPTP) for initial probing pockets ≥ 6 mm with a 10-year follow-up were evaluated. In total, 24 patients (16 test cases and 8 control cases) were treated with the NSPTP. The control group (CG) was treated only with nonsurgical conventional therapy, while the test group (TG) received treatment with thermal diode lasers (wavelength of 808 or 980 nm). All patients had recall visits every 3 months and were reevaluated at 1 year after NSPTP...
September 2017: International Journal of Periodontics & Restorative Dentistry
https://www.readbyqxmd.com/read/28817080/feasibility-study-of-an-optical-caustic-plasmonic-light-scattering-sensor-for-human-serum-anti-dengue-protein-e-antibody-detection
#2
Antonio A García, Lina S Franco, Miguel A Pirez-Gomez, José L Pech-Pacheco, Jorge F Mendez-Galvan, Carlos Machain-Williams, Lourdes Talavera-Aguilar, José H Espinosa-Carrillo, Miriam M Duarte-Villaseñor, Christian Be-Ortiz, Luz E Espinosa-de Los Monteros, Ariel Castillo-Pacheco, Julian E Garcina-Rejon
Antibody detection and accurate diagnosis of tropical diseases is essential to help prevent the spread of disease. However, most detection methods lack cost-effectiveness and field portability, which are essential features for achieving diagnosis in a timely manner. To address this, 3D-printed oblate spheroid sample chambers were fabricated to measure green light scattering of gold nanoparticles using an optical caustic focus to detect antibodies. Scattering signals of 20-200 nm gold nanoparticles using a green laser were compared to green light emitting diode (LED) light source signals and to Mie theory...
August 17, 2017: Diagnostics
https://www.readbyqxmd.com/read/28815239/-elimination-of-entercoccus-faecalis-with-different-disinfection-methods-in-root-canals-in-vitro
#3
Chu-Wen Sun, Ya-Qin Zhu
PURPOSE: To compare the elimination effect against E.faecalis in root canals with different methods. METHODS: Fifty extracted premolars with single root canal were selected. After cleaning and autoclaving, they were contaminated by E.faecalis and incubated for 28 days as models. Then the models were randomly and equally divided into 5 groups and treated as below: specimens in group A were treated with saline irrigation, specimens in group B were treated with 3% NaClO irrigation (as positive control), specimens in group C were treated with PUI, specimens in group D were treated with diode laser radiation, specimens in group E were treated with combination of PUI and diode laser radiation...
April 2017: Shanghai Kou Qiang Yi Xue, Shanghai Journal of Stomatology
https://www.readbyqxmd.com/read/28815057/giant-retinal-tear-after-intra-arterial-chemotherapy-for-advanced-unilateral-retinoblastoma
#4
Camila V Ventura, Audina M Berrocal, Jennifer Thomson, Fiona J Ehlies, Azeema Latiff, Timothy G Murray
BACKGROUND: Retinoblastoma is considered the most common intraocular malignancy in childhood, comprising 4% of all pediatric cancers. Management of retinoblastoma has evolved over the past two decades and intra-ophthalmic artery chemotherapy has emerged as a new modality of globe-conserving treatment with excellent results. This treatment achieves effective tumor reduction by delivering localized chemotherapy, decreases enucleation rate, and minimizes systemic and local side effects. CASE PRESENTATION: We report the case of an 8-year-old girl with a late presentation of an advanced unilateral retinoblastoma associated to diffuse exudative retinal detachment in the right eye, classified as group E by the International Classification of Retinoblastoma...
2017: International Journal of Retina and Vitreous
https://www.readbyqxmd.com/read/28812913/transcanalicular-laser-assisted-dacryocystorhinostomy-with-diode-laser
#5
Deepesh Mourya, Roshija Khanal Rijal
This article compares the efficacy of transcanalicular laser assisted dacryocystorhinostomy (TL DCR) with conventional external dacryocystorhinostomy (Ex DCR). All patients were randomly divided into two groups - Group A included patients who underwent TL DCR and Group B included patients who underwent Ex DCR. 168 operations were done in a total of 163 patients; 79 patients in group A and 84 patients in group B. The overall success rate was 90.12% in group A and 95.40% in group B. The mean total surgical time was 17...
August 16, 2017: Orbit
https://www.readbyqxmd.com/read/28809895/1-5%C3%A2-%C3%A2-kw-efficient-cw-nd-yag-planar-waveguide-mopa-laser
#6
Juntao Wang, Zhenhai Wu, Hua Su, Tangjian Zhou, Jun Lei, Wenqiang Lv, Jing He, Liu Xu, Yuejian Chen, Dan Wang, Lixin Tong, Hao Hu, Qingsong Gao, Chun Tang
In this Letter, we report a 1064 nm continuous wave Nd:YAG planar waveguide laser with an output power of 1544 W based on the structure of the master oscillator power amplification. A fiber laser is used as the master oscillator, and diode laser arrays are used as the pump source of the waveguide laser amplifier. The dimension of the waveguide is 1  mm (T)×10  mm (W)×60  mm (L), and the dual end oblique pumping is adopted with different angles. After a single-pass amplification, the power is scaled from 323 to 1544 W with the pump power of 2480 W, leading to an optical-to-optical efficiency of 49%...
August 15, 2017: Optics Letters
https://www.readbyqxmd.com/read/28802354/a-novel-management-of-streptococcal-pharyngotonsillar-infections-by-laser-activated-silver-nanoparticles-and-methylene-blue-conjugate-in%C3%A2-vitro-study
#7
Ahmed Kassab, Ola Dabous, Mona Morsy
INTRODUCTION: Species of Streptococcus are classified based on their hemolytic properties into alpha and beta types. And, since antimicrobial drug resistance is an increasingly problematic issue, the efforts to develop modalities that would overcome this obstacle and avoid antibiotic side effects is an ongoing challenge. METHODS AND MATERIALS: 20 patients from both sexes were selected. The isolated organisms were identified according to standard laboratory methods...
September 2017: International Journal of Pediatric Otorhinolaryngology
https://www.readbyqxmd.com/read/28800107/sequestration-effect-on-the-open-cyclic-switchable-property-of-warfarin-induced-by-cyclodextrin-time-resolved-fluorescence-study
#8
Naji Al-Dubaili, Na'il Saleh
The excited-state lifetimes of the anticoagulant drug warfarin (W) in water and in the absence and presence of methyl-β-cyclodextrins (Me-β-CD) were recorded using time-resolved fluorescence measurements. Selective excitation of the open and cyclic protonated isomers of W were acquired with laser emitting diodes (LED) producing 320 and 280 nm excitation pulses, respectively. Formation of the inclusion complex was checked by UV-visible absorption spectroscopy, and the values of binding constants (2.9 × 10³ M(-1) and 4...
August 11, 2017: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://www.readbyqxmd.com/read/28791605/laser-and-light-treatments-for-hair-reduction-in-fitzpatrick-skin-types-iv-vi-a-comprehensive-review-of-the-literature
#9
REVIEW
Rachel A Fayne, Marina Perper, Ariel E Eber, Adam S Aldahan, Keyvan Nouri
Unwanted facial and body hair presents as a common finding in many patients, such as females with hirsutism. With advances in laser and light technology, a clinically significant reduction in hair can be achieved in patients with light skin. However, in patients with darker skin, Fitzpatrick skin types (FST) IV-VI, the higher melanin content of the skin interferes with the proposed mechanism of laser-induced selective photothermolysis, which is to target the melanin in the hair follicle to cause permanent destruction of hair bulge stem cells...
August 8, 2017: American Journal of Clinical Dermatology
https://www.readbyqxmd.com/read/28780623/effect-of-a-photosensitization-reaction-performed-during-the-first-3%C3%A2-min-after-exposure-of-rat-myocardial-cells-to-talaporfin-sodium-in-vitro
#10
Marika Doi, Emiyu Ogawa, Tsunenori Arai
To better understand the mechanism of photodynamic cardiac ablation, we studied the effects of a photosensitization reaction (PR) performed during the first 3 min after rat myocardial cells were exposed to talaporfin sodium. A 3-mm-square microelectrode array with 64 electrodes was used to continuously measure the action potentials of the myocardial cells. A 30 μg/mL talaporfin sodium solution, a chlorine photosensitizer, was used, along with a 663-nm red diode laser (86 mW/cm(2) for up to 600 s). The first trough of the measured action potential waveform corresponding to Na(+) dynamics decreased exponentially with increasing PR duration...
August 5, 2017: Lasers in Medical Science
https://www.readbyqxmd.com/read/28774032/inkjet-printing-of-functional-materials-for-optical-and-photonic-applications
#11
REVIEW
Jorge Alamán, Raquel Alicante, Jose Ignacio Peña, Carlos Sánchez-Somolinos
Inkjet printing, traditionally used in graphics, has been widely investigated as a valuable tool in the preparation of functional surfaces and devices. This review focuses on the use of inkjet printing technology for the manufacturing of different optical elements and photonic devices. The presented overview mainly surveys work done in the fabrication of micro-optical components such as microlenses, waveguides and integrated lasers; the manufacturing of large area light emitting diodes displays, liquid crystal displays and solar cells; as well as the preparation of liquid crystal and colloidal crystal based photonic devices working as lasers or optical sensors...
November 10, 2016: Materials
https://www.readbyqxmd.com/read/28773227/characterization-of-gallium-indium-phosphide-and-progress-of-aluminum-gallium-indium-phosphide-system-quantum-well-laser-diode
#12
REVIEW
Hiroki Hamada
Highly ordered gallium indium phosphide layers with the low bandgap have been successfully grown on the (100) GaAs substrates, the misorientation toward [01-1] direction, using the low-pressure metal organic chemical vapor deposition method. It is found that the optical properties of the layers are same as those of the disordered ones, essentially different from the ordered ones having two orientations towards [1-11] and [11-1] directions grown on (100) gallium arsenide substrates, which were previously reported...
July 28, 2017: Materials
https://www.readbyqxmd.com/read/28773152/cultured-human-fibroblast-biostimulation-using-a-940-nm-diode-laser
#13
Rebeca Illescas-Montes, Lucía Melguizo-Rodríguez, Francisco Javier Manzano-Moreno, Olga García-Martínez, Concepción Ruiz, Javier Ramos-Torrecillas
BACKGROUND: Fibroblasts are the main cells involved in regeneration during wound healing. The objective was to determine the effect of 940 nm diode laser on cultured human fibroblasts using different irradiation regimens. METHODS: The CCD-1064Sk human epithelial fibroblast cell line was treated with a 940 nm diode laser at different energy doses (power: 0.2-1 W and energy density: 1-7 J/cm²) using different transmission modes (continuous or pulsed). The effect on cell growth at 24 and 72 h post-treatment was examined by measuring the proliferative capacity, the impact on the cell cycle, and the effect on cell differentiation...
July 13, 2017: Materials
https://www.readbyqxmd.com/read/28772842/a-study-of-efficiency-droop-phenomenon-in-gan-based-laser-diodes-before-lasing
#14
Mei-Xin Feng, Qian Sun, Jian-Ping Liu, Zeng-Cheng Li, Yu Zhou, Shu-Ming Zhang, Hui Yang
Carrier recombination behavior in c-plane GaN-based laser diodes (LDs) is numerically investigated by using the commercial software LASTIP. It is found that efficiency droop phenomenon does exist in GaN-based LDs before lasing, which is confirmed by experimental results. However, the current density corresponding to the peak efficiency of GaN-based LDs before lasing, Jmax, is nearly 40 A/cm², which is much lower than that reported by other studies. The reported Jmax, measured from the cavity facet side is modulated by the absorption of quantum wells, which shifts the Jmax to a higher value...
April 30, 2017: Materials
https://www.readbyqxmd.com/read/28772571/vibration-assisted-femtosecond-laser-drilling-with-controllable-taper-angles-for-amoled-fine-metal-mask-fabrication
#15
Wonsuk Choi, Hoon Young Kim, Jin Woo Jeon, Won Seok Chang, Sung-Hak Cho
This study investigates the effect of focal plane variation using vibration in a femtosecond laser hole drilling process on Invar alloy fabrication quality for the production of fine metal masks (FMMs). FMMs are used in the red, green, blue (RGB) evaporation process in Active Matrix Organic Light-Emitting Diode (AMOLED) manufacturing. The taper angle of the hole is adjusted by attaching the objective lens to a micro-vibrator and continuously changing the focal plane position. Eight laser pulses were used to examine how the hole characteristics vary with the first focal plane's position, where the first pulse is focused at an initial position and the focal planes of subsequent pulses move downward...
February 21, 2017: Materials
https://www.readbyqxmd.com/read/28772008/dual-wavelength-reflectance-spectroscopy-of-the-superior-vena-cava-a-method-for-placing-central-venous-catheters-at-the-cavoatrial-junction
#16
Bradley J Stringer, Spencer B Shumway, Matthew D Holbrook, Cameron G Copeland, Alexander A Gosch, Kai Kück
There are a limited number of methods to guide and confirm the placement of a peripherally-inserted central catheter (PICC) at the cavoatrial junction. The aim of this study was to design, test, and validate a dual wavelength, diode laser-based, single optical fiber instrument that would accurately confirm PICC tip location at the cavoatrial junction of an animal heart, in vivo. This was accomplished by inserting the optical fiber into a PICC and ratiometrically comparing simultaneous visible and near-infrared reflection intensities of venous and atrial tissues found near the cavoatrial junction...
August 3, 2017: Journal of Biophotonics
https://www.readbyqxmd.com/read/28770995/short-term-environmental-effects-and-their-influence-on-spatial-homogeneity-of-organic-solar-cell-functionality
#17
Huei-Ting Chien, Peter Wilhelm Zach, Bettina Friedel
In this study, we focus on induced degradation and spatial inhomogeneity of organic photovoltaic devices under different environmental conditions, uncoupled from the influence of any auxiliary hole-transport (HT) layer. During testing of according devices comprising the standard photoactive layer of poly(3-hexylthiophene) (P3HT) as donor, blended with phenyl-C61-butyric acid methyl ester (PC60BM) as acceptor, a comparison was made between non-encapsulated devices upon exposure to argon in the dark, dry air in the dark, dry air with illumination and humid air in the dark...
August 3, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28769094/enhanced-performance-of-gan-based-ultraviolet-light-emitting-diodes-by-photon-recycling-using-graphene-quantum-dots
#18
Tzu-Neng Lin, Svette Reina Merden Santiago, Chi-Tsu Yuan, Kuo-Pin Chiu, Ji-Lin Shen, Ting-Chun Wang, Hao-Chung Kuo, Ching-Hsueh Chiu, Yung-Chi Yao, Ya-Ju Lee
Graphene quantum dots (GQDs) with an average diameter of 3.5 nm were prepared via pulsed laser ablation. The synthesized GQDs can improve the optical and electrical properties of InGaN/InAlGaN UV light emitting diodes (LEDs) remarkably. An enhancement of electroluminescence and a decrease of series resistance of LEDs were observed after incorporation of GQDs on the LED surface. As the GQD concentration is increased, the emitted light (series resistance) in the LED increases (decreases) accordingly. The light output power achieved a maximum increase as high as 71% after introducing GQDs with the concentration of 0...
August 2, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28767808/preliminary-results-of-severe-venous-insufficiency-treatment-with-thermal-ablation-of-the-great-saphenous-vein-by-endovascular-technique-with-laser-diode-980nm-developed-in-brazil-associated-with-sclerotherapy-with-polidocanol
#19
Matheus Bertanha, Marcone Lima Sobreira, Paula Angelelli Bueno Camargo, Rafael Elias Farres Pimenta, Jamil Victor Oliveira Mariúba, Regina Moura, Vanderlei Salvador Bagnato, Winston Bonetti Yoshida
The endovenous laser ablation (EVLA) of the insufficient saphenous vein has similar results to open conventional surgery, but less morbidity. The echo-guided polidocanol foam sclerotherapy technique has been used for the same purpose. The combined techniques may play a role for more severe diseases, such as those with varicose ulcers. An EVLA device (called VELAS) has been developed in the Optics and Photonics Research Center of USP-São Carlos in agreement with FMB-UNESP. In this study, we present the preliminary results of the VELAS device (MMO 980nm diode) in patients with chronic venous ulcer, associated with echo-guided polidocanol foam sclerotherapy for the treatment of varicosities...
May 2017: Revista do Colégio Brasileiro de Cirurgiões
https://www.readbyqxmd.com/read/28765671/evaluation-of-the-diode-laser-810nm-980-nm-on-color-change-of-teeth-after-external-bleaching
#20
Nazanin Kiomars, Pouneh Azarpour, Mansooreh Mirzaei, Sedighe Sadat Hashemi Kamangar, Mohammad Javad Kharazifard, Nasim Chiniforush
Subject and aim: The aim of this study was to evaluate the efficiency of diode laser-activated bleaching systems for color change of teeth. Materials & Methods: 40 premolars with intact enamel surfaces were selected for five external bleaching protocols (n=8). Two different wavelengths of diode laser (810 and 980 nm) with two different hydrogen peroxide concentrations (30% and 46%) were selected for laser bleaching. Group 1 received bleaching (Heydent- Germany) with a 810 nm diode laser; Group 2 received bleaching (Heydent- Germany) with a 980 nm diode laser; Group 3 received bleaching (laser white*20- Biolase) with a 810 nm diode laser; Group 4 received bleaching (laser white*20- Biolase) with a 980 nm diode laser, with an output power of 1...
December 30, 2016: Laser Therapy
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