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Nd Yag laser

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https://www.readbyqxmd.com/read/28339548/enhancement-of-the-antidermatophytic-activity-of-silver-nanoparticles-by-q-switched-nd-yag-laser-and-monoclonal-antibody-conjugation
#1
Salama A Ouf, Abdel-Aleam H Mohamed, Amira A El-Adly
The objective of this research was to investigate the effect of silver nanoparticles (AgNPs), free or conjugated with monoclonal antibody and mediated by Q-switched Nd:YAG laser on five dermatophytes. The laser was applied for 45 s at 532 nm and 0.8 J/cm2. The application of AgNPs combined with laser caused an increase in fungal susceptibility compared to application of AgNPs alone. The MIC50 and MIC100 recorded 3 and 9 μg/ml in the case of E. floccosum (the most susceptible species), 10 and 19 μg/ml for T...
October 7, 2016: Medical Mycology: Official Publication of the International Society for Human and Animal Mycology
https://www.readbyqxmd.com/read/28339132/formation-of-endohedral-metallofullerene-emf-ions-of-mnc2m-m%C3%A2-%C3%A2-la-y-n%C3%A2-%C3%A2-%C3%A2-6-50%C3%A2-%C3%A2-%C3%A2-2%C3%A2-m%C3%A2-%C3%A2-%C3%A2-194-in-the-laser-ablation-process-with-graphene-as-precursor
#2
Xianglei Kong, Xiaodi Bao
RATIONALE: Graphene has been found to be a versatile precursor for the generation of mono-endohedral metallofullerenes (EMFs) of alkali and alkali earth metal atoms. Thus, it is important to investigate whether graphene is also a good precursor for the generation of EMFs including multi-metal atoms or some transition metal atoms. METHODS: Experiments were performed on a 7.0 T Fourier transform ion cyclotron resonance (FT ICR) mass spectrometer. Laser ablation mass spectra were obtained by laser irradiation on mixtures of graphene and LaCl3 , YCl3 or HAuCl4 on a stainless steel plate...
March 24, 2017: Rapid Communications in Mass Spectrometry: RCM
https://www.readbyqxmd.com/read/28336863/a-high-power-frequency-tunable-colloidal-quantum-dot-cdse-zns-laser
#3
Saradh Prasad, Hanan Saleh AlHesseny, Mohamad S AlSalhi, Durairaj Devaraj, Vadivel Masilamai
Tunable lasers are essential for medical, engineering and basic science research studies. Most conventional solid-state lasers are capable of producing a few million laser shots, but limited to specific wavelengths, which are bulky and very expensive. Dye lasers are continuously tunable, but exhibit very poor chemical stability. As new tunable, efficient lasers are always in demand, one such laser is designed with various sized CdSe/ZnS quantum dots. They were used as a colloid in tetrahydrofuran to produce a fluorescent broadband emission from 520 nm to 630 nm...
January 30, 2017: Nanomaterials
https://www.readbyqxmd.com/read/28333393/laser-generated-shockwaves-enhance-antibacterial-activity-against-biofilms-in-vitro
#4
William Yao, Edward C Kuan, Nathan C Francis, Maie A St John, Warren S Grundfest, Zachary D Taylor
BACKGROUND AND OBJECTIVES: Bacterial biofilm formation within chronic wound beds, which provides an effective barrier against antibiotics, is a known cause of recalcitrant infections and a significant healthcare burden, often requiring repeated surgical debridements. Laser-generated shockwaves (LGS) is a novel, minimally invasive, and nonthermal modality for biofilm mechanical debridement which utilizes compressive stress waves, generated by photonic absorption in thin titanium films to mechanically disrupt the biofilm...
March 23, 2017: Lasers in Surgery and Medicine
https://www.readbyqxmd.com/read/28332191/combined-application-of-er-yag-and-nd-yag-lasers-in-treatment-of-chronic-periodontitis-a-split-mouth-single-blind-randomized-controlled-trial
#5
M Sağlam, S Köseoğlu, I Taşdemir, H Erbak Yılmaz, L Savran, R Sütçü
BACKGROUND: The aim of the present study was to compare the effectiveness of combined Er:YAG and Nd:YAG laser therapy to that of scaling and root planing with hand instruments in non-surgical treatment of chronic periodontitis. MATERIAL AND METHODS: Twenty-five systemically healthy patients with chronic periodontitis were selected for this study. The quadrants were randomly allocated in a split-mouth design to either combined Er:YAG (160 mJ/pulse, 10 Hz) and Nd:YAG laser (100 mJ/pulse, 20 Hz) therapy (test group) or scaling and root planing alone (control group)...
March 23, 2017: Journal of Periodontal Research
https://www.readbyqxmd.com/read/28318157/-effects-of-nd-yag-laser-irradiation-on-the-root-surfaces-and-adhesion-of-streptococcus-mutans
#6
Li Yuanhong, Li Zhongcheng, Luo Mengqi, Shen Daonan, Zhang Shu, Meng Shu
OBJECTIVE: This study aimed to evaluate the effects of treatment with different powers of Nd: YAG laser irradiation on root surfaces and Streptococcus mutans (S. mutans) adhesion. METHODS: Extracted teeth because of severe periodontal disease were divided into the following four groups: control group, laser group 1, laser group 2, and laser group 3. After scaling and root planning, laser group 1, laser group 2, and laser group 3 were separately treated with Nd: YAG laser irradiation (4/6/8 W, 60 s); however, the control group did not receive the treatment...
December 1, 2016: Hua Xi Kou Qiang Yi Xue za Zhi, Huaxi Kouqiang Yixue Zazhi, West China Journal of Stomatology
https://www.readbyqxmd.com/read/28301014/evaluation-of-surface-roughness-and-bacterial-adhesion-on-tooth-enamel-irradiated-with-high-intensity-lasers
#7
Ruchele D Nogueira, Camilla B Silva, Cesar P Lepri, Regina Guenka Palma-Dibb, Vinicius R Geraldo-Martins
The aim was to evaluate the surface roughness and bacterial adhesion on enamel irradiated with high intensity lasers, associated or not to a fluoride varnish. Eighty fragments of bovine enamel were equally divided in 8 groups (n=10). Group 1 was not treated and Group 2 received only a 5% fluoride varnish application. The other groups were irradiated with an Er:Cr:YSGG (8.92 J/cm2), an Nd:YAG (84.9 J/cm2) and a diode laser (199.04 J/cm2), associated or not to a 5% fluoride varnish. The surface roughness was measured before and after treatments...
January 2017: Brazilian Dental Journal
https://www.readbyqxmd.com/read/28299489/a-split-face-comparison-of-q-switched-nd-yag-1064-nm-laser-for-facial-rejuvenation-in-nevus-of-ota-patients
#8
Cao Yongqian, Lin Li, Bi Jianhai, Huo Ran, Guo Li, Wei Hao, Wang Xining, Xie Shigang, Wang Yibing
We aimed to investigate the efficacy and safety of using the 1064-nm Q-switched neodymium-doped yttrium aluminum garnet (Nd:YAG) laser (QSNYL) for skin rejuvenation in patients with Nevus of Ota. A retrospective, randomized, split-faced, clinical study was conducted. Twenty-nine patients with unilateral moderate to severe Nevus of Ota were enrolled. The participants completed 3-13 sessions of QSNYL treatments 3-6 months apart. Two independent physicians compared the treated and untreated sides of the face to evaluate the clearance of Nevus of Ota, the wrinkle severity rating scale (WSRS), the global aesthetic improvement scale (GAIS), and adverse event reporting...
March 15, 2017: Lasers in Medical Science
https://www.readbyqxmd.com/read/28294697/efficacy-of-low-level-laser-therapy-in-subjective-tinnitus-patients-with-temporomandibular-disorders
#9
Nermin Demirkol, Aslihan Usumez, Mehmet Demirkol, Fatih Sari, Cihan Akcaboy
OBJECTIVE AND BACKGROUND: Tinnitus is an apparent sound, perceived in the ear with no stimulus. It has been described as a sound originating from the brain. It affects 17% of the general population. Etiological factors for tinnitus include temporomandibular joint disorders (TMJ, TMD) and Costen's syndrome. The aim of treatment is to eliminate the tinnitus or at least decrease its apparent volume. MATERIALS AND METHODS: In total, 46 patients referred to our department with bilateral subjective tinnitus with TMDs were selected for this study...
March 14, 2017: Photomedicine and Laser Surgery
https://www.readbyqxmd.com/read/28293873/the-association-between-nd-yag-laser-and-desensitizing-dentifrices-for-the-treatment-of-dentin-hypersensitivity
#10
Sandra Ribeiro Cunha, Stephanie Assimakopoulos Garófalo, Taís Scaramucci, Denise Maria Zezell, Ana Cecilia Corrêa Aranha
This study aims to evaluate the association between Nd:YAG laser (with and without a photoabsorber) and two desensitizing dentifrices containing 15% NovaMin or 8% arginine, as potential treatments for dentin hypersensitivity (DH). DH was simulated by EDTA application for 2 min. Specimens were then analyzed with an environmental scanning electron microscope (ESEM) to ensure open dentin tubules (ODT), counted by using ImageJ software. Specimens were randomized into eight groups (n = 10): Laser (L), Laser+Photoabsorber (LP), Arginine (A), Arginine+Laser (AL), Arginine+Laser+Photoabsorber (ALP), NovaMin (N), NovaMin+Laser (NL), and NovaMin+Laser+Photoabsorber (NLP)...
March 14, 2017: Lasers in Medical Science
https://www.readbyqxmd.com/read/28293872/effect-of-high-laser-output-on-the-central-bronchi-and-pulmonary-artery
#11
A Kirschbaum, P Rexin, D K Bartsch, K Quint
A diode-pump Nd:YAG high-power laser (wavelength 1320 nm, power 100 W) is routinely used to surgically remove lung metastases. Even pulmonary lesions in central locations are resectable via this method, yet it also carries a potential risk of damaging the larger bronchi and vessels in the vicinity. Studies investigating the safety of using high-power lasers are lacking. We therefore aimed to examine the direct effects of a 100-watt laser on the bronchi and pulmonary artery at a standard working velocity. From freshly slaughtered pigs, we isolated cylindrical specimens of the trachea, the main and lobar bronchi, and the central pulmonary artery from the both lungs...
March 14, 2017: Lasers in Medical Science
https://www.readbyqxmd.com/read/28286654/it-s-better-to-be-lucky%C3%A2-%C3%A2-%C3%A2-successful-management-of-an-acute-endobronchial-tumour-embolism-in-the-icu-a-case-report-and-review-of-the-literature
#12
Christopher J Walsh, Ron Olivenstein, Eric Forget, Anne V Gonzalez
Endobronchial tumour embolism is a rare cause of acute central airway obstruction. It is primarily reported during pneumonectomy, and the outcome is frequently fatal. Successful management requires the urgent removal of tumour with rigid or flexible bronchoscopy. We present the case of a 62-year-old woman with poorly differentiated non-small cell lung cancer (NSCLC), referred to our institution for Nd:YAG laser photoresection of endobronchial tumour completely obstructing the right mainstem bronchus (RMSB)...
May 2017: Respirology Case Reports
https://www.readbyqxmd.com/read/28282558/efficacy-of-scaling-and-root-planning-with-and-without-adjunct-nd-yag-laser-therapy-on-clinical-periodontal-parameters-and-gingival-crevicular-fluid-interleukin-1-beta-and-tumor-necrosis-factor-alpha-levels-among-patients-with-periodontal-disease-a-prospective
#13
Tariq Abduljabbar, Fahim Vohra, Sergio Varela Kellesarian, Fawad Javed
BACKGROUND AND AIM: Limited evidence exists regarding the role of scaling and root planning (SRP) with adjunct neodymium yttrium aluminum garnet (Nd:YAG) laser therapy in reducing periodontal parameters (plaque index [PI], bleeding on probing [BOP] and probing pocket depth [PPD]) and levels of proinflammatory cytokines in the gingival crevicular fluid (GCF) among patients with periodontal disease (PD). The aim was to assess the effect of SRP with and without adjunct Nd:YAG laser therapy on clinical periodontal parameters and GCF interleukin 1-beta (IL-1β) and tumor necrosis factor-alpha (TNF-α) levels among patients with PD...
March 3, 2017: Journal of Photochemistry and Photobiology. B, Biology
https://www.readbyqxmd.com/read/28280508/is-it-necessary-to-prepare-the-enamel-before-dental-bleaching
#14
Andréa Dias Neves Lago, Patrícia Moreira de Freitas, Erika Michele Dos Santos Araújo, Adriana Bona Matos, Narciso Garone-Netto
The aim of this in vitro study was to assess the influence of distinct surface treatments on the microhardness and color of enamel that will be bleached. Surface treatments are tested, accordingly: G1, no treatment; G2, 2% sodium fluoride; G3, casein phosphopeptide paste; G4, 2% fluoride+Nd:YAG laser. Forty blocks from bovine teeth composed the sample that were tested in Knoop microhardness (n = 10) and in color change (n = 10). After 24 h, bleaching with 35% hydrogen peroxide was performed for 45 min. Microhardness and color changes (using parameters ΔE, ΔL, Δa, and Δb) were assessed before and after bleaching...
2017: International Journal of Dentistry
https://www.readbyqxmd.com/read/28271946/the-effect-of-long-pulsed-nd-yag-laser-for-the-treatment-of-onychomycosis
#15
Gökhan Okan, Nagehan Tarikci, Gonca Gokdemir
BACKGROUND: Topical onychomycosis therapies are usually inadequate, and patient compliance to systemic therapies is poor. Recently, interest in laser therapy for the treatment of onychomycosis has increased. We sought to investigate the efficacy of long-pulsed Nd:YAG laser therapy for onychomycosis. METHODS: Thirty patients with mycologically confirmed onychomycosis received long-pulsed 1064-nm Nd:YAG laser therapy, moving the beam in a spiral pattern over the whole nail plate two times, with a 1-minute pause between passes...
January 2017: Journal of the American Podiatric Medical Association
https://www.readbyqxmd.com/read/28265789/depigmentation-with-q-switched-nd-yag-laser-in-universal-vitiligo-a-long-term-follow-up-study-of-4%C3%A2-years
#16
Imran Majid, Saher Imran
Q-switched (QS) lasers are used for depigmentation in universal vitiligo, but there is limited data on long-term results after laser treatment. This study was conducted to assess the safety and long-term follow-up results of QS Nd:YAG laser treatment in combination with need-based topical depigmentation therapy for universal vitiligo. A retrospective study was performed on patients with universal vitiligo who had received QS Nd:YAG laser treatment from 2010 to 2013. All patients were contacted and called for follow-up...
March 7, 2017: Lasers in Medical Science
https://www.readbyqxmd.com/read/28256789/piezoelectric-electrospun-nanocomposite-comprising-au-nps-pvdf-for-nerve-tissue-engineering
#17
Asma Sadat Motamedi, Hamid Mirzadeh, Fereshteh Hajiesmaeilbaigi, Shadab Bagheri Khoulenjani, Mohammad Ali Shokrgozar
In this study, gold nanoparticles/Polyvinylidenefluoride composite electrospun mat with enhanced piezoelectricity were fabricated and characterized. Gold colloidal nanoparticles (Au NPs) were prepared via laser ablation of metallic targets in liquid media. The active Q-switched Nd:YAG laser was used as an irradiation source. Then, PVDF (Polyvinylidenefluoride) was dissolved in Au NPs colloidal solution at 30% wt for the synthesis of Au NPs/PVDF composite nanofibers by electrospinning. The optical absorbance spectra of Au NPS and the polymeric solutions were obtained by the UV-Visible spectroscopy...
March 3, 2017: Journal of Biomedical Materials Research. Part A
https://www.readbyqxmd.com/read/28251725/effects-of-different-desensitizers-and-lasers-on-dentine-tubules-an-in-vitro-analysis
#18
Elif Öncü, Said Karabekiroğlu, Nimet Ünlü
BACKGROUND: Dentin hypersensitivity is an important clinical problem affecting a large percentage of the population, and various therapies have been suggested for its treatment-among them desensitizing agents and lasers. The aim of this study was to evaluate the in vitro effects of different in-office desensitizing agents and different type lasers, alone or in combination, on human dentinal tubules. MATERIALS AND METHODS: Eighty-four dentinal specimens obtained from freshly extracted impacted third molars were included and subsequently divided into seven groups: Group 1 (Control), Group 2 (Gluma desensitizer), Group 3 (Teethmate desensitizer), Group 4 (Nd:YAG laser), Group 5 (Er:YAG laser), Group 6 (Gluma desensitizer + Er:YAG laser), and Group 7 (Teethmate desensitizer + Er:YAG laser)...
March 2, 2017: Microscopy Research and Technique
https://www.readbyqxmd.com/read/28251395/microstructure-and-corrosion-behavior-of-laser-surface-treated-az31b-mg-bio-implant-material
#19
Tso-Chang Wu, Yee-Hsien Ho, Sameehan S Joshi, Ravi S Rajamure, Narendra B Dahotre
Although magnesium and magnesium alloys are considered biocompatible and biodegradable, they suffer from poor corrosion performance in the human body environment. In light of this, surface modification via rapid surface melting of AZ31B Mg alloy using a continuous-wave Nd:YAG laser was conducted. Laser processing was performed with laser energy ranging from 1.06 to 3.18 J/mm(2). The corrosion behavior in simulated body fluid of laser surface-treated and untreated AZ31B Mg alloy samples was evaluated using electrochemical technique...
March 2, 2017: Lasers in Medical Science
https://www.readbyqxmd.com/read/28249428/hydrogen-bond-induced-hf-elimination-from-photoionized-fluorophenol-dimers-in-the-gas-phase
#20
Piyali Chatterjee, Arup K Ghosh, Tapas Chakraborty
In this paper, we report finding of a remarkable chemical effect of hydrogen bonding, elimination of hydrogen fluoride (HF) from the hydrogen bonded dimers of 2-fluorophenol (2-FP) and 3-fluorophenol (3-FP), in a supersonic jet expansion upon multi-photon ionization using 4th harmonic wavelength (266 nm) of a Q-switched Nd:YAG laser, and the reaction has been probed by time-of-flight mass spectrometry. No HF elimination is observed to occur by such means from the monomer of 3-FP, but it occurs with a small yield from the monomer of 2-FP...
February 28, 2017: Journal of Chemical Physics
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