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https://www.readbyqxmd.com/read/28719537/the-effect-of-slt-laser-application-on-iris-to-treat-sectorial-heterochromia-a-promising-technique
#1
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
https://www.readbyqxmd.com/read/28710660/fractional-er-yag-laser-assisting-topical-betamethasone-solution-in-combination-with-nb-uvb-for-resistant-non-segmental-vitiligo
#2
Ru Yan, Jinping Yuan, Hongqiang Chen, Yuan-Hong Li, Yan Wu, Xing-Hua Gao, Hong-Duo Chen
Resistant non-segmental vitiligo is difficult to be treated. Ablative erbium-YAG (Er:YAG) laser has been used in the treatment of vitiligo, but the ablation of entire epidermis frustrated the compliance of patients. The purpose of this study is to investigate the effects of fractional Er:YAG laser followed by topical betamethasone and narrow band ultraviolet B (NB-UVB) therapy in the treatment of resistant non-segmental vitiligo. The vitiligo lesions of each enrolled patient were divided into four treatment parts, which were all irradiated with NB-UVB...
July 14, 2017: Lasers in Medical Science
https://www.readbyqxmd.com/read/28708251/efficacy-of-photon-initiated-photoacoustic-streaming-on-apically-extruded-debris-with-different-preparation-systems-in-curved-canals
#3
D Arslan, A Kustarci
AIM: To determine the effect of photon-initiated photoacoustic streaming (PIPS) on the extrusion of debris using multiple-file (ProTaper Next-PTN) and single-file (One Shape-OS) continuous rotary systems in curved canals in human molar teeth. METHODOLOGY: Sixty extracted maxillary first molar teeth with curved mesial roots, mature apices and of similar lengths were selected. Teeth with apical diameters larger than size 15 were discarded. The teeth were randomly divided into 4 experimental groups (n=15 teeth per group) according to the file used and irrigation systems: (1) OS with PIPS with a 2940 nm Er:YAG laser (0...
July 14, 2017: International Endodontic Journal
https://www.readbyqxmd.com/read/28708180/4d-spatiotemporal-evolution-of-combustion-intermediates-in-turbulent-flames-using-burst-mode-volumetric-laser-induced-fluorescence
#4
Benjamin R Halls, Naibo Jiang, Terrence R Meyer, Sukesh Roy, Mikhail N Slipchenko, James R Gord
High-speed (20 kHz rate), volumetric laser-induced-fluorescence imaging of combustion intermediates such as a formaldehyde (CH<sub>2</sub>O) and polycyclic aromatic hydrocarbon (PAH) species is demonstrated for tracking the four-dimensional (4D) evolution of turbulent flames. The third-harmonic, 355 nm output of a burst-mode Nd:YAG laser with a 130 mJ/pulse is expanded to 30 mm diameter for volume illumination of the base region of a methane-hydrogen jet diffusion flame. Eight simultaneous images from different viewing angles are used to collect the resulting fluorescence signal for reconstruction of 200 time-sequential three-dimensional volumes over 10 ms duration...
July 15, 2017: Optics Letters
https://www.readbyqxmd.com/read/28708162/high-energy-nd-yag-laser-system-with-arbitrary-sub-nanosecond-pulse-shaping-capability
#5
R A Meijer, A S Stodolna, K S E Eikema, S Witte
We report on a laser system capable of generating high-energy (>270  mJ) temporally shaped pulses at 1064 nm with 0.43-ns shaping resolution. The pulses are generated by modulation of a continuous-wave seed laser and subsequent amplification by a dual-stage grazing-incidence Nd:YVO4 "bounce" amplifier and a Nd:YAG power amplifier (all quasi-continuous diode-pumped). The system produces pulses with a high-quality top-hat spatial beam profile with up to 0.6 GW of peak power and 44 W of average power, a power stability of 0...
July 15, 2017: Optics Letters
https://www.readbyqxmd.com/read/28708156/2%C3%A2-%C3%A2-w-single-longitudinal-mode-yb-yag-distributed-feedback-waveguide-laser
#6
Thomas Calmano, Martin Ams, Peter Dekker, Michael J Withford, Christian Kränkel
Single longitudinal mode (SLM) lasers are important tools for many scientific and commercial applications. SLM operation can be achieved in distributed-feedback (DFB) lasers based on Bragg structures. Semiconductor waveguide DFB lasers are well-established devices, but their output power is limited to a few hundred milliwatts. DFB lasers have also been demonstrated in dielectric waveguides. However, in this case the output power was even lower. Here we present the first monolithic Yb:YAG DFB laser. The waveguide and the DFB structure were fabricated in the volume of an Yb:YAG crystal by ultrafast laser inscription...
July 15, 2017: Optics Letters
https://www.readbyqxmd.com/read/28708155/adaptive-aberration-correction-of-a-5%C3%A2-%C3%A2-j-6-6%C3%A2-%C3%A2-ns-200%C3%A2-%C3%A2-hz-solid-state-nd-yag-laser
#7
Xin Yu, Lizhi Dong, Boheng Lai, Ping Yang, Shanqiu Chen, Wenjin Liu, Shuai Wang, Guomao Tang, Jisi Qiu, Zhijun Kang, Yueliang Liu, Hao Liu, Yong Liu, Zhongwei Fan, Bing Xu
In this Letter, we present an adaptive aberration correction system to simultaneously compensate for aberrations and reshaping the beams. A low-order aberration corrector is adapted. In this corrector, four lenses are mounted on a motorized rail, whose positions can be obtained using a ray tracing method based on the beam parameters detected by a wavefront sensor. After automatic correction, the PV value of the wavefront is reduced from 26.47 to 1.91 μm, and the beam quality β is improved from 18.42 to 2...
July 15, 2017: Optics Letters
https://www.readbyqxmd.com/read/28707034/randomized-controlled-trial-comparing-nd-yag-laser-photocoagulation-and-bipolar-electrocautery-in-the-management-of-epistaxis
#8
Jing Zhang, Luhong Cao, Chunsheng Wei
The objective of this study is to evaluate the efficacy and degree of comfort of Nd:YAG laser photocoagulation compared to bipolar electrocautery in the management of epistaxis. Seventy-two consecutive patients with a history of epistaxis were randomly assigned to receive treatment in an outpatient setting consisting of either bipolar electrocautery (group 1) or Nd:YAG laser photocoagulation (group 2). The study was conducted in university-affiliated teaching hospital. Seventy-two consecutive patients who suffered from anterior epistaxis and presented to the Otolaryngology Department at the Eye, Ear, Nose and Throat Hospital, Fudan University, between June 2015 and August 2015...
July 13, 2017: Lasers in Medical Science
https://www.readbyqxmd.com/read/28702973/clinical-and-histological-changes-in-hidradenitis-suppurativa-following-1064-nm-nd-yag-intralesional-laser-treatment
#9
N Zerbinati, E D'Este, L Ini, A Baruffato, V Premoli, A Calligaro, M Paulli
Hidradenitis Suppurativa (HS) is recently attracting much attention and awareness, often because it is misdiagnosed for years, restricting the therapeutic options. Moreover, this pathology arises in areas such as the inguinal region, that may cause embarrassment in young patients. Wrong diagnosis and delay in appropriate treatments lead to an exacerbation of the symptoms and a progression of the disease, which at the last stage can only be managed through extensive surgical excisions, ablation and vaporization of nodules with CO2 laser systems or aggressive chemotherapies such as anti-TNF-alpha like adalimumab (Humira®-AbbVie Inc...
July 13, 2017: Journal of Biological Regulators and Homeostatic Agents
https://www.readbyqxmd.com/read/28699676/influence-of-multi-wavelength-laser-irradiation-of-enamel-and-dentin-surfaces-at-0-355-2-94-and-9-4%C3%A2-%C3%AE-m-on-surface-morphology-permeability-and-acid-resistance
#10
Nai-Yuan N Chang, Jamison M Jew, Jacob C Simon, Kenneth H Chen, Robert C Lee, William A Fried, Jinny Cho, Cynthia L Darling, Daniel Fried
OBJECTIVE: Ultraviolet (UV) and infrared (IR) lasers can be used to specifically target protein, water, and mineral, respectively, in dental hard tissues to produce varying changes in surface morphology, permeability, reflectivity, and acid resistance. The purpose of this study was to explore the influence of laser irradiation and topical fluoride application on the surface morphology, permeability, reflectivity, and acid resistance of enamel and dentin to shed light on the mechanism of interaction and develop more effective treatments...
July 12, 2017: Lasers in Surgery and Medicine
https://www.readbyqxmd.com/read/28693690/clinical-evaluation-of-color-doppler-ultrasound-in-selecting-the-optimal-treatment-modality-for-infantile-hemangioma-%C3%A2
#11
Li Min, Liu Juan, Maya Valeska, Luo Dan, Zhou Bingrong
Objective We investigated the efficacy and safety of 1064 nm Nd: YAG laser, intense pulsed light (IPL), and lauromacrogol injection in the treatment of hemangioma, in order to evaluate the value of color Doppler ultrasound guidance in choosing the optimal treatment modality. Methods Infantile patients who were clinical diagnosed as hemangiomas were randomly divided into group A, who had color Doppler ultrasound examinations before the treatment, and group B who had the treatment without ultrasound evaluation...
June 10, 2017: Chinese Medical Sciences Journal, Chung-kuo i Hsüeh K'o Hsüeh Tsa Chih
https://www.readbyqxmd.com/read/28691887/effects-of-an-erbium-yttrium-aluminum-garnet-er-yag-laser-and-an-ultrasonic-scaler-on-tio2-coated-titanium-surfaces-contaminated-with-subgingival-plaque-an-in-vitro-study-to-assess-post-treatment-biocompatibility-to-osteogenic-cells
#12
Marco Giannelli, Daniele Bani, Alessia Tani, Fabrizio Materassi, Flaminia Chellini, Chiara Sassoli
BACKGROUND: We evaluated the effects of conventional ultrasonic scaler vs. Er-YAG laser on titanium surfaces contaminated with subgingival plaque from peri-implantitis patients in terms of: plaque and bio-corroded titanium oxide coating removal; surface change induction; residual biocompatibility towards osteoblasts. METHODS: Subgingival plaque-coated titanium discs with moderately rough surface were fixed with ethanol and treated with ultrasonic scaler (metal tip) or Er-YAG laser (20...
July 10, 2017: Journal of Periodontology
https://www.readbyqxmd.com/read/28690515/a-case-of-facial-partial-unilateral-lentiginosis-treated-with-low-fluence-1-064-nm-q-switched-neodymium-doped-yttrium-aluminum-garnet-laser
#13
En Hyung Kim
Partial unilateral lentiginosis (PUL) is an unusual pigmentary disorder characterized by numerous lentigines grouped within an area of normal skin. Although treatment is not necessary, many patients with facial PUL seek medical help for cosmetic reasons. There is no established standard treatment for PUL. Conventional lasers may cause postinflammatory hyperpigmentation because keratinocytes are injured during the process. Also, scarring, long downtime, and pain are important issues. A 19-year-old patient with facial PUL was successfully treated with low-fluence 1,064-nm Q-switched neodymium-doped yttrium aluminum garnet (QS Nd:YAG) laser...
May 2017: Case Reports in Dermatology
https://www.readbyqxmd.com/read/28688872/paraganglioma-of-the-urinary-bladder-a-series-of-22-cases-in-a-single-center
#14
Hongyun Zhai, Xin Ma, Wenyuan Nie, Hongzhao Li, Cheng Peng, Xintao Li, Yu Zhang, Xu Zhang
OBJECTIVE: Paraganglioma of the urinary bladder (PUB) is rare in bladder cancer, and currently, a study examining large number of cases from a single center has not been reported. This study aimed to present the clinical features, treatments, pathological characteristics, and prognosis of PUB. PATIENTS AND METHODS: From January 2006 to June 2016, 22 patients were pathologically diagnosed with PUB in our hospital. Their clinical records, operative notes, pathological reports, and follow-up records were retrospectively reviewed...
March 28, 2017: Clinical Genitourinary Cancer
https://www.readbyqxmd.com/read/28685201/longitudinal-changes-in-erectile-function-after-thulium-yag-prostatectomy-for-the-treatment-of-benign-prostatic-obstruction-a-1-year-follow-up-study
#15
Jae Seung Chung, Sang Hyun Park, Cheol Kyu Oh, Seong Cheol Kim, Taek Sang Kim, Pil Moon Kang, Won Ik Seo, Wan Seok Kim, Jang Ho Yoon, Dong Ii Kang, Kweon Sik Min, Jae Ii Chung
This study aimed to evaluate the impact of thulium:yttrium-aluminum-garnet (Tm:YAG) (RevoLix®) laser prostatectomy for the treatment of benign prostatic obstructions on erectile function (EF). A total of 208 patients who underwent Tm:YAG laser prostatectomies participated in this study. All cases were evaluated preoperatively and at 3, 6, and 12 months postoperatively using the International Prostate Symptom Score (IPSS), quality of life (QoL) score, and the International Index of Erectile Function (IIEF-5) questionnaires...
July 6, 2017: Lasers in Medical Science
https://www.readbyqxmd.com/read/28684320/focal-choroidal-excavation-and-a-traumatic-macular-hole-secondary-to-accidental-q-switched-nd-yag-laser
#16
Yuanlu Shuai, Xianglei Chen, Wangyi Fang, Jia Li, Weizhong Ge, Songtao Yuan, Qinghuai Liu
Today, the widespread use of laser instruments in various fields has resulted in many accidental retinal injuries. Here we describe a rare clinical case of full-thickness macular hole (MH) and focal choroidal excavation (FCE) caused by a 1064-nm Q-switched Nd:YAG laser. After pars plana vitrectomy and the following 14 months, consecutive optical coherence tomography imagings showed closure of the MH. Visual acuity improved even in the absence of the outer retina and in the presence of FCE. We speculate that different focusing effects of the unexpected Nd:YAG laser which target different levels of retinal tissue generates diverse prognosis...
July 3, 2017: Photodiagnosis and Photodynamic Therapy
https://www.readbyqxmd.com/read/28683481/-recanalization-of-lacrimal-duct-stenosis-by-laserdacryoplasty-using-a-diode-laser-comparison-of-success-rates-using-an-erbium%C3%A2-%C3%A2-yag-laser
#17
Ludwig Stock, Ralf Ungerechts, Karl-Heinz Emmerich
Background In a retrospective study, the success rates of laserdacryoplasty using a diode laser were defined and compared to success rates using an erbium : YAG laser. Using a diode laser at a wave length of 980 nm, thermal destruction of tissue leads to recanalization. Using an erbium : YAG laser at a wave length of 2940 nm, recanalization of punctual stenosis is achieved by formation of a cavitation bubble in a closed system. Materials and Methods 94 patients (64 women, 30 men, mean age 60.8 years) with 107 absolute lacrimal duct stenoses who were treated by laserdacryoplasty using a diode laser were included in a retrospective study...
July 6, 2017: Klinische Monatsblätter Für Augenheilkunde
https://www.readbyqxmd.com/read/28682146/treatment-of-caf%C3%A3-au-lait-macules-with-a-high-fluenced-1-064-nm-q-switched-neodymium-yttrium-aluminum-garnet-laser
#18
Jiehoon Kim, Hoon Hur, Yu Ri Kim, Sung Bin Cho
Café-au-lait macules (CALMs) are light to dark brown macules or patches of increased melanin concentration found along the dermoepidermal junction. Although many attempts to treat CALMs using various kinds of laser/light-based devices have been reported, CALMs remain refractory thereto with high recurrence rates. In this case series, we describe four patients with idiopathic CALMs that were effectively and safely treated with a non-ablative, high-fluenced, Q-switched (QS), 1,064-nm neodymium:yttrium aluminum garnet (Nd:YAG) laser...
July 6, 2017: Journal of Cosmetic and Laser Therapy: Official Publication of the European Society for Laser Dermatology
https://www.readbyqxmd.com/read/28674857/an-uncommon-case-of-intermittent-pourfour-du-petit-syndrome-associated-with-acute-angle-closure-glaucoma-successfully-treated-by-laser-iridotomy
#19
Roberta Farci, Pietro Emanuele Napoli, Maurizio Fossarello
PURPOSE: To describe a case of acute angle-closure glaucoma secondary to intermittent mydriasis related to Pourfour du Petit Syndrome caused by tracheal deviation. MATERIALS AND METHODS: A 70-year-old Caucasian woman visited the Emergency Room of the University Eye Clinic complaining of blurring of vision and difficulty to move superior eyelid in her right eye. Examination revealed reactive mydriasis, and upper lid retraction on the right side. The rest of the ophthalmological examination was normal, and a cranial computed tomography (CT) did not identify any abnormalities...
July 3, 2017: International Ophthalmology
https://www.readbyqxmd.com/read/28674654/ureteral-stricture-formation-after-removal-of-proximal-ureteral-stone-retroperitoneal-laparoscopic-ureterolithotomy-versus-ureteroscopy-with-holmium-yag-laser-lithotripsy
#20
Henglong Hu, Lu Xu, Shaogang Wang, Xiao Yu, Huan Yang, Ejun Peng, Lei Cui, Cong Li
OBJECTIVE: To compare the risk of postoperative ureteral stricture formation following retroperitoneal laparoscopic ureterolithotomy (RPLU) and ureteroscopy with holmium: YAG laser lithotripsy (URSL) in patients with proximal ureteral stones. MATERIALS AND METHODS: We retrospectively reviewed the medical records of patients who underwent RPLU or URSL for proximal ureteral stones between April 2011 and May 2015. Patients were allocated into URSL group or RPLU group and the outcomes were compared...
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