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Nd Yag laser

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https://www.readbyqxmd.com/read/28823062/treatment-of-retinal-artery-occlusion-using-transluminal-nd-yag-laser-a-systematic-review-and-meta-analysis
#1
REVIEW
Vitaly Man, Idan Hecht, Michal Talitman, Assaf Hilely, Mohamad Midlij, Zvia Burgansky-Eliash, Asaf Achiron
AIMS: To review clinical experience, efficacy, and safety of transluminal Nd:YAG laser embolectomy/embolysis (TYE) for retinal artery occlusion. METHODS:  Electronic databases were searched for all published clinical studies and case-reports reporting on TYE in central (CRAO) or branch (BRAO) retinal artery occlusion. Individual patient data was evaluated in a weighted pooled analysis. RESULTS: Sixty-one cases were reported, 47 with BRAO and 14 with CRAO...
August 19, 2017: Graefe's Archive for Clinical and Experimental Ophthalmology
https://www.readbyqxmd.com/read/28815247/-changes-of-cementum-endotoxin-levels-in-different-teeth-with-periodontitis-treated-with-root-conditioning
#2
Chang-Sheng Fu, Rong-Sen Liu, Yun Luo, Long Ou, Ying-Chao Li, Xian-Hua Zhang
PURPOSE: To observe the changes of endotoxin levels after different teeth with periodontitis were treated with different methods. METHODS: Six healthy premolars extracted for orthodontic reasons and 36 posterior teeth extracted due to severe periodontitis were selected. Each tooth was processed from two 4 mm×4 mm×1 mm cementum pieces 2 mm under the cementum-enamel junction, each tooth with periodontitis was numbered. Healthy teeth served as negative control group, one of the two tablets from each tooth with periodontitis was selected in the periodontitis group, which was not treated with root surface treatment...
April 2017: Shanghai Kou Qiang Yi Xue, Shanghai Journal of Stomatology
https://www.readbyqxmd.com/read/28809895/1-5%C3%A2-%C3%A2-kw-efficient-cw-nd-yag-planar-waveguide-mopa-laser
#3
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/28809365/type-of-surgical-treatment-and-recurrence-of-oral-leukoplakia-a-retrospective-clinical-study
#4
L Monteiro, C Barbieri, S Warnakulasuriya, M Martins, F Salazar, J-J Pacheco, P Vescovi, M Meleti
BACKGROUND: Oral leukoplakia (OL) is the most typical potentially malignant disorder of the oral mucosa. We aimed to evaluate the clinical outcome of oral leukoplakia treated with several types of lasers and with the use of quantic molecular resonance (QMR) lancet, in terms of recurrence rate. MATERIAL AND METHODS: Eighty-seven previously untreated OL (52 occurring in females and 35 in males, mean age of 59.4 ± 13.9 years) were consecutively submitted to surgical treatment at University Hospital of Parma, Italy, and Hospital de Valongo, Portugal, (1999 to 2012)...
August 15, 2017: Medicina Oral, Patología Oral y Cirugía Bucal
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
#5
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/28776112/laser-treatments-of-active-acne
#6
REVIEW
Lauren E Wiznia, Mary L Stevenson, Arielle R Nagler
The utility of laser therapy is increasingly being recognized in the treatment of active acne vulgaris. We aimed to perform a narrative review of the medical literature on the use of laser therapy for the treatment of active acne vulgaris. We performed a PubMed literature search on September 1, 2016 using the search terms "active acne," "acne," "laser therapy," and "laser surgery." Case reports, case series, cohort, and controlled trials were included. Studies of lasers in the treatment of acne, including erbium glass, Nd:YAG, pulse dye laser (PDL), potassium titanyl phosphate (KTP) laser, and laser-based photodynamic therapy, have been published...
August 4, 2017: Lasers in Medical Science
https://www.readbyqxmd.com/read/28774511/resident-performed-neodymium-yag-laser-posterior-capsulotomy
#7
Khalil Ghasemi Falavarjani, Mohammadreza Aghamirsalim, Kaveh Abri Aghdam
OBJECTIVE: To investigate the outcomes of resident-performed Nd:YAG laser posterior capsulotomy. DESIGN: Combined retrospective and prospective study. PARTICIPANTS: Patients (N = 301) who underwent Nd:YAG capsulotomy by ophthalmology residents at Rassoul Akram Hospital, Tehran, Iran. METHODS: Assessment of visual outcomes and complications and the results of second- and third-year residents. RESULTS: In the retrospective arm, 131 eyes of 129 patients were enrolled...
August 2017: Canadian Journal of Ophthalmology. Journal Canadien D'ophtalmologie
https://www.readbyqxmd.com/read/28772955/characterization-of-a-laser-surface-treated-martensitic-stainless-steel
#8
S R Al-Sayed, A A Hussein, A A Nofal, S I Hassab Elnaby, H Elgazzar
Laser surface treatment was carried out on AISI 416 machinable martensitic stainless steel containing 0.225 wt.% sulfur. Nd:YAG laser with a 2.2-KW continuous wave was used. The aim was to compare the physical and chemical properties achieved by this type of selective surface treatment with those achieved by the conventional treatment. Laser power of different values (700 and 1000 W) with four corresponding different laser scanning speeds (0.5, 1, 2, and 3 m•min-1) was adopted to reach the optimum conditions for impact toughness, wear, and corrosion resistance for laser heat treated (LHT) samples...
May 29, 2017: Materials
https://www.readbyqxmd.com/read/28772884/enhanced-thermo-optical-switching-of-paraffin-wax-composite-spots-under-laser-heating
#9
Asmaa Said, Abeer Salah, Gamal Abdel Fattah
Thermo-optical switches are of particular significance in communications networks where increasingly high switching speeds are required. Phase change materials (PCMs), in particular those based on paraffin wax, provide wealth of exciting applications with unusual thermally-induced switching properties, only limited by paraffin's rather low thermal conductivity. In this paper, the use of different carbon fillers as thermal conductivity enhancers for paraffin has been investigated, and a novel structure based on spot of paraffin wax as a thermo-optic switch is presented...
May 12, 2017: Materials
https://www.readbyqxmd.com/read/28772625/an-efficient-violet-amplified-spontaneous-emission-ase-from-a-conjugated-polymer-pfo-co-px-in-solution
#10
Sara Abdulaziz Alfahd, Saradh Prasad Rajendra, Wafa Al-Mujammi, Durairaj Devaraj, Vadivel Masilamani, Mohamad Saleh AlSalhi
The optical of conjugated polymer poly[(9,9-dioctylfluorenyl-2,7-diyl)-co-(2,5-p-xylene)] also known as [(PFO-co-pX), ADS145UV], dissolved in a few solvents, has been measured. The absorption, emission spectra, and quantum yield have been investigated by using a spectrophotometer and spectrofluorometer, respectively. The properties of Amplified Spontaneous Emission (ASE) of conjugated PFO-co-pX polymer under different conditions such as solvent type, concentration, and pumping energy have been examined by using the tripled frequency of a Nd:YAG laser as a source of pumping...
March 7, 2017: Materials
https://www.readbyqxmd.com/read/28772383/investigation-on-the-mechanism-and-failure-mode-of-laser-transmission-spot-welding-using-pmma-material-for-the-automotive-industry
#11
Xiao Wang, Baoguang Liu, Wei Liu, Xuejiao Zhong, Yingjie Jiang, Huixia Liu
To satisfy the need of polymer connection in lightweight automobiles, a study on laser transmission spot welding using polymethyl methacrylate (PMMA) is conducted by using an Nd:YAG pulse laser. The influence of three variables, namely peak voltages, defocusing distances and the welding type (type I (pulse frequency and the duration is 25 Hz, 0.6 s) and type II (pulse frequency and the duration is 5 Hz, 3 s)) to the welding quality was investigated. The result showed that, in the case of the same peak voltages and defocusing distances, the number of bubbles for type I was obviously more than type II...
January 1, 2017: Materials
https://www.readbyqxmd.com/read/28761293/treatment-and-classification-of-nevus-of-ota-a-seven-year-review-of-a-single-institution-s-experience
#12
Jae-Hui Nam, Han-Saem Kim, Young Jun Choi, Ho Joo Jung, Won-Serk Kim
BACKGROUND: Nevus of Ota (NO) is a relatively common pigmentary disorder in Asians. Tanino's classification is an old but tacit consensus to delineate the disease. Various treatment options have been presented. However, a few studies have been conducted on available laser options and current treatment strategies or the classification of NO. OBJECTIVE: To investigate current laser options and their effectiveness for the treatment of NO, contributing factors to clinical outcomes, and verification of classification...
August 2017: Annals of Dermatology
https://www.readbyqxmd.com/read/28761290/beneficial-effect-of-low-fluence-1-064-nm-q-switched-neodymium-yttrium-aluminum-garnet-laser-in-the-treatment-of-senile-lentigo
#13
Jae-Hui Nam, Han-Saem Kim, Ga-Young Lee, Won-Serk Kim
BACKGROUND: Low fluence 1,064 nm Q-switched (QS) Neodymium:Yttrium-Aluminum-Garnet (Nd:YAG) laser treatment, also known as laser toning, is widely used for pigmentary disorders. There has been no reliable evaluation of the effect of low fluence 1,064 nm QS Nd:YAG laser for senile lentigo. OBJECTIVE: To investigate the beneficial effect of low fluence 1,064 nm QS Nd:YAG laser in the treatment of senile lentigo on the face. METHODS: A retrospective review was conducted on patients treated only with repetitive low fluence 1,064 nm QS Nd:YAG laser...
August 2017: Annals of Dermatology
https://www.readbyqxmd.com/read/28756937/short-pulse-neodymium-yttrium-aluminium-garnet-nd-yag-1064nm-laser-irradiation-photobiomodulates-mitochondria-activity-and-cellular-multiplication-of-paramecium-primaurelia-protozoa
#14
Andrea Amaroli, Alberico Benedicenti, Silvia Ravera, Steven Parker, Wayne Selting, Isabella Panfoli, Stefano Benedicenti
Few studies exist to explore the potential photobiomodulation (PBM) effect of neodymium:yttrium-aluminium garnet (Nd:YAG) laser irradiation using a flat-top handpiece delivery system. In this study, we explored the photobiomodulation effect of that laser, on Paramecium primaurelia. The parameters for the different study groups were: 0.50W, 10Hz, 100msp, 30J/cm(2); 0.75W, 10Hz, 100msp, 45J/cm(2); 1.00W, 10Hz, 100msp, 60J/cm(2); 1.25W, 10Hz, 100msp, 75J/cm(2) and 1.50W, 10Hz, 100msp, 90J/cm(2). Our results suggest that only the parameter 0...
June 19, 2017: European Journal of Protistology
https://www.readbyqxmd.com/read/28750153/safety-and-efficacy-of-dual-wavelength-laser-1064-nm-595-nm-for-treatment-of-non-treated-port-wine-stains
#15
Tianyou Wang, Da Chen, Jingyan Yang, Gang Ma, Wenxin Yu, Xiaoxi Lin
BACKGROUND: Patients with port-wine stain (PWS) suffer physically and psychologically because of the high incidence (0.3%-0.5%) of the disease. Pulsed dye laser (PDL) at 595 nm is the gold standard of the treatment for PWS. Nevertheless, clinicians intend to determine whether the dual wavelength laser (DWL) (595 nm PDL + 1064 nm Nd:YAG) is an adequate choice in the treatment of non-treated PWS. This study is the first prospective within-patient controlled research seeking to investigate the safety and efficacy of DWL for the treatment of non-treated PWS...
July 27, 2017: Journal of the European Academy of Dermatology and Venereology: JEADV
https://www.readbyqxmd.com/read/28748671/ti6al4v-laser-surface-preparation-and-functionalization-using-hydroxyapatite-for-biomedical-applications
#16
D Faria, C S Abreu, M Buciumeanu, N Dourado, O Carvalho, F S Silva, G Miranda
This work presents a novel texture design for implants surface functionalization, through the creation of line-shaped textures on Ti6Al4V surfaces and subsequent sintering of hydroxyapatite (HAp) powder into the designated locations. HAp-rich locations were designed to avoid HAp detachment during insertion, thus guaranteeing an effective osseointegration. This process starts by creating textured lines using a Nd:YAG laser, filling these lines with HAp powder and sintering HAp using a CO2 laser. The adhesion of HAp is known to be influenced by HAp sintering parameters, especially laser power and scanning speed and also by the textured lines manufacturing...
July 27, 2017: Journal of Biomedical Materials Research. Part B, Applied Biomaterials
https://www.readbyqxmd.com/read/28741292/effect-of-mdp-based-silane-and-different-surface-conditioner-methods-on-bonding-of-resin-cements-to-zirconium-framework
#17
Hatice Özdemir, Nuran Yanikoğlu, Nurdan Sağsöz
PURPOSE: To determine the shear bond strength (SBS) between zirconium framework and resin cements after different surface conditioner methods and after application of 10-methacryloyloxydecyl dihydrogen phosphate (MDP) based silane and a bonding agent mix. MATERIALS AND METHODS: 128 disc-shaped zirconium-oxide specimens were prepared. Specimens were placed in autopolymerizing acrylic resin. The bonding surface of specimens was smoothed consecutively with 600-, 800-, and 1200-grit silicon carbide papers under water cooling...
July 24, 2017: Journal of Prosthodontics: Official Journal of the American College of Prosthodontists
https://www.readbyqxmd.com/read/28740326/on-line-laser-radiation-controlled-to-the-removal-of-adhesive-on-teeth-after-bracket-debonding
#18
Clara Gómez, Juan Carlos Palma, Ángel Costela
BACKGROUND AND AIMS: After bracket debonding a correct removal of the adhesive from tooth surfaces without causing any iatrogenic damage to the enamel is needed. However, conventional techniques do not allow a selective removal process. The present article focuses on the removal of adhesive on teeth after bracket debonding by using laser radiation at 355 nm (third harmonic wavelength of a Q-switched Nd:YAG). MATERIAL AND METHODS: Brackets were bonded to 10 extracted human premolars from young patients and removed after a storage period of 2 months...
March 31, 2017: Laser Therapy
https://www.readbyqxmd.com/read/28739025/soldering-mask-laser-removal-from-printed-circuit-boards-aiming-copper-recycling
#19
Marcus Paulo Raele, Lucas Ramos De Pretto, Denise Maria Zezell
Management of waste of electric and electronic equipment (WEEE) is a key issue for modern societies; furthermore, it contains valuable materials that can be recycled, especially in printed circuit boards (PCB), which have approximately one-third of their weight in copper. In this study we demonstrated the use of laser to strip the covering soldering mask on PCB's, thus exposing the copper underneath so that extraction techniques may take place. Using a Q-Switched Nd:YAG laser operating at 1064nm and 532nm we tested the procedure under different energy conditions...
July 21, 2017: Waste Management
https://www.readbyqxmd.com/read/28719537/the-effect-of-slt-laser-application-on-iris-to-treat-sectorial-heterochromia-a-promising-technique
#20
Ayhan Basoglu, Uğur Çelik
The purpose of this study is to report a new and promising method for changing iris color in a sectorial heterochromia iridis patient. A 22-year-old man with a complaint of innate color disparity between his eyes presented to our clinic to seek medical advice. He underwent a comprehensive ophthalmic examination, including visual acuity, biomicroscopy, fundoscopy, intraocular pressure measurements, endothelial cell count, and evaluation of iridocorneal angle. The causes of acquired heterochromia were excluded...
July 14, 2017: Eye & Contact Lens
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