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https://www.readbyqxmd.com/read/28223745/intense-pulsed-light-alone-and-in-combination-with-erbium-yttrium-aluminum-garnet-laser-on-small-to-medium-sized-congenital-melanocytic-nevi-single-center-experience-based-on-retrospective-chart-review
#1
Mi So Lee, Hee Jin Jun, Sang Hyun Cho, Jeong Deuk Lee, Hei Sung Kim
BACKGROUND: Treatment of congenital melanocytic nevi (CMN) with intense pulsed light (IPL) has recently produced promising results. OBJECTIVE: To evaluate the clinical and histological outcomes of small-to-medium sized CMN treated with IPL alone and in combination with erbium: yttrium-aluminum-garnet (Er: YAG) laser. METHODS: We performed a retrospective chart review of 26 small-to-medium sized CMN treated as described above. The reduction in visible pigmentation, signs of recurrence and any adverse skin changes were evaluated by two independent clinicians...
February 2017: Annals of Dermatology
https://www.readbyqxmd.com/read/28210823/non-ablative-erbium-yag-laser-for-the-treatment-of-type-iii-stress-urinary-incontinence-intrinsic-sphincter-deficiency
#2
Adrian Gaspar, Hugo Brandi
The objective of this pilot study was to determine the safety and efficacy of a new non-ablative erbium YAG laser procedure for the treatment of type III stress urinary incontinence (intrinsic sphincter deficiency) in women. Twenty-two patients with a Valsalva leak point pressure less than 60 cm H2O were recruited and treated with a non-ablative erbium laser delivering low fluence pulses inside the whole length of the urethra through a specially designed cannula. Treatment consisted of two treatment sessions with a 3-week interval in-between...
February 16, 2017: Lasers in Medical Science
https://www.readbyqxmd.com/read/28208995/a-comparative-analysis-of-caries-inhibitory-effect-of-remineralizing-agents-on-human-enamel-treated-with-er-yag-laser-an-in-vitro-atomic-emission-spectrometry-analysis
#3
Aswin Saseendran Nair, R Krishna Kumar, Sunil Thomas Philip, Syed Shaheed Ahameed, Sairaj Punnathara, Joby Peter
INTRODUCTION: The tug of war to maintain tooth integrity is dependent on a ratio between demineralization and remineralization. Hence, demineralization should be retarded and remineralization should be enhanced to maintain a natural equilibrium in the oral cavity. AIM: To compare in-vitro acid resistance of human enamel when using Casein Phosphopeptides Amorphous Calcium Phosphate (CPP-ACP) [GC Tooth mousse] cream, Casein Phosphopeptide Amorphous Calcium Fluoride Phosphate (CPP-ACFP) [GC Tooth mousse plus] cream, Er:YAG laser alone, combination of CPP-ACP with Er:YAG laser, CPP-ACFP with Er:YAG laser...
December 2016: Journal of Clinical and Diagnostic Research: JCDR
https://www.readbyqxmd.com/read/28208899/study-of-variation-in-intraocular-pressure-spike-iop-following-nd-yag-laser-capsulotomy
#4
Niharika K Shetty, Sriya Sridhar
INTRODUCTION: Posterior Capsular Opacifications (PCO) is a frequent complication of cataract surgery following posterior chamber intraocular lens implantation. Nd -Yag laser capsulotomy is the treatment of choice for PCO and is known to be associated with complications like Raised Intraocular Pressure (IOP), Intraocular lens pitting, intraocular lens cracks, cystoid macular oedema, retinal detachment, corneal burns. Raised IOP is the most common complication and prescribing anti-glaucoma drugs post capsulotomy is a common practise...
December 2016: Journal of Clinical and Diagnostic Research: JCDR
https://www.readbyqxmd.com/read/28203003/-bleeding-control-of-periodontal-mechanical-therapy-for-patients-taking-aspirin
#5
F Ding, Y L Lyu, W Xuan, D Y Liu, X Q Duan, X Han
OBJECTIVE: To investigate the feasibility of periodontal mechanical therapy for chronic periodontitis and coronary heart disease patients with low dose of aspirin. METHODS: Sixty nine chronic periodontitis patients with coronary heart disease were randomly selected as the experimental group (medication group, group A), the control group (withdrawal group, group B) including 20 chronic periodontitis patients with coronary artery disease, stopping the drug for one week and another control group with 50 chronic periodontitis patients (group C)...
February 18, 2017: Beijing da Xue Xue Bao. Yi Xue Ban, Journal of Peking University. Health Sciences
https://www.readbyqxmd.com/read/28198879/picosecond-pulse-generated-supercontinuum-as-a-stable-seed-for-opcpa
#6
Lukáš Indra, František Batysta, Petr Hříbek, Jakub Novák, Zbyněk Hubka, Jonathan T Green, Roman Antipenkov, Robert Boge, Jack A Naylon, Pavel Bakule, Bedřich Rus
We present a stable supercontinuum (SC) generated in a bulk YAG crystal, pumped by 3 ps chirped pulses at 1030 nm. The SC is generated in a loose focus geometry in a 13 cm long YAG crystal, allowing for stable and robust single-filament generation. The SC energy stability exceeds that of the pump laser by almost a factor of 3. Additionally, we show that the SC spectrum has long-term stability and that the SC is coherent and compressible by compressing the portions of SC spectra close to the corresponding Fourier limit...
February 15, 2017: Optics Letters
https://www.readbyqxmd.com/read/28198864/shot-noise-limited-laser-power-stabilization-for-the-aei-10%C3%A2-%C3%A2-m-prototype-interferometer
#7
Jonas Junker, Patrick Oppermann, Benno Willke
The AEI 10 m Prototype interferometer is an experiment to investigate the standard quantum limit of interferometry and, in particular, its relevance in gravitational-wave detection. As such it has stringent requirements on the power stability of its high-power light source. In this Letter we present the power stabilization concept of the 35 W Nd:YAG laser system used in the AEI 10 m Prototype. With a shot-noise-limited multiphotodetector sensing scheme we achieved a relative power noise level of 1.8×10<sup>-9</sup>  Hz<sup>-1/2</sup> in a frequency band of 100 Hz to 1 kHz...
February 15, 2017: Optics Letters
https://www.readbyqxmd.com/read/28198860/approach-for-power-scaling-solid-state-lasers-with-intracavity-motion
#8
Matthew Eckold, Jacob I Mackenzie, W Andrew Clarkson
Solid-state lasers are typically limited by adverse thermal effects within the gain medium. In this Letter we describe a new method for dramatically reducing thermal effects in an end-pumped solid-state laser by incorporating a rotating intracavity periscope in the resonator to spatially separate the lasing and thermal processes. In contrast with previous examples of moving solid-state lasers, our approach keeps the gain medium stationary, simplifying the heat removal arrangement. This scheme has been applied to an Nd:YAG laser, yielding an output power of 120 W at 1...
February 15, 2017: Optics Letters
https://www.readbyqxmd.com/read/28198839/parametric-amplification-of-100-fs-mid-infrared-pulses-in-zngep-sub-2-sub-driven-by-a-ho-yag-chirped-pulse-amplifier
#9
Tsuneto Kanai, Pavel Malevich, Sarayoo Sasidharan Kangaparambil, Kakuta Ishida, Makoto Mizui, Kaoru Yamanouchi, Heinar Hoogland, Ronald Holzwarth, Audrius Pugzlys, Andrius Baltuska
We report on the parametric generation of 100 fs sub-6-cycle 40 μJ pulses with the center wavelength at 5.2 μm using a 1 ps 2.1 μm pump laser and a dispersion management scheme based on bulk material. Our optically synchronized amplifier chain consists of a Ho:YAG chirped-pulse amplifier and white-light-seeded optical parametric amplifiers providing simultaneous passive carrier-envelope phase locking of three ultrashort longwave pulses at the pump, signal, and idler wavelengths corresponding, respectively, to 2...
February 15, 2017: Optics Letters
https://www.readbyqxmd.com/read/28197412/bronchoscopic-diagnosis-and-treatment-of-primary-tracheobronchial-amyloidosis-a-retrospective-analysis-from-china
#10
Xiaoxiao Lu, Bixiu He, Ge Wang, Baimei He, Lijing Wang, Qiong Chen
Objective. To assess the value of bronchoscopy in the diagnosis and treatment of primary tracheobronchial amyloidosis (TBA), in order to reduce misdiagnosis rates and improve prognosis. Methods. Clinical data of 107 patients with TBA reported from 1981 to 2015 in China were retrospectively analyzed for clinical features, bronchoscopic manifestations, pathologies, treatments, and outcomes. Results. 105 of 107 TBA patients were pathologically confirmed by bronchoscopy. Main bronchoscopic manifestations of TBA were single or multiple nodules and masses within tracheobronchial lumens; local or diffuse luminal stenosis and obstruction; luminal wall thickening and rigidity; rough or uneven inner luminal walls; congestion and edema of mucosa, which was friable and prone to bleeding upon touch; and so forth...
2017: BioMed Research International
https://www.readbyqxmd.com/read/28196171/er-yag-laser-for-surgical-crown-lengthening-a-6-month-clinical-study
#11
Chang-Kai Chen, Yung-Tsan Wu, Nai-Jen Chang, Wan-Hong Lan, Jyuhn-Hurng Ke, Earl Fu, Da-Yo Yuh
This study evaluated use of a solid-state laser to avoid the flap technique and suturing. An Er:YAG laser was used in 26 consecutive patients referred for osseous crown lengthening in 32 posterior teeth. The distance from the planned restoration margin to the alveolar crest (B) satisfied a 3-mm dentogingival complex. No tissue necrosis and no significant change in the distance from the gingival margin to B or probing depth were detected at 3 and 6 months. Minimally invasive Er:YAG laser surgery decreases the time needed to establish the gingival margin necessary for definitive restoration...
March 2017: International Journal of Periodontics & Restorative Dentistry
https://www.readbyqxmd.com/read/28196161/effectiveness-of-nd-yag-laser-fiberotomy-in-clinical-crown-lengthening-by-forced-eruption
#12
Masoumeh Faramarzi, Sahand Rikhtegaran, Sogol H Biroon
Crown lengthening by forced eruption is usually followed by conventional surgical procedures. The aim of the present study was to evaluate clinical use of Nd:YAG laser fiberotomy in crown lengthening by forced eruption as an alternative to surgery. Patients who needed crown lengthening were enrolled in this prospective case series and underwent forced eruption. Fiberotomy by Nd:YAG laser was performed 2 days after initiation of forced eruption and every 2 weeks afterward to reach optimum clinical crown length...
March 2017: International Journal of Periodontics & Restorative Dentistry
https://www.readbyqxmd.com/read/28189834/dual-time-resolved-temperature-jump-fluorescence-and-infrared-spectroscopy-for-the-study-of-fast-protein-dynamics
#13
Caitlin M Davis, Michael J Reddish, R Brian Dyer
Time-resolved temperature-jump (T-jump) coupled with fluorescence and infrared (IR) spectroscopy is a powerful technique for monitoring protein dynamics. Although IR spectroscopy of the polypeptide amide I mode is more technically challenging, it offers complementary information because it directly probes changes in the protein backbone, whereas, fluorescence spectroscopy is sensitive to the environment of specific side chains. With the advent of widely tunable quantum cascade lasers (QCL) it is possible to efficiently probe multiple IR frequencies with high sensitivity and reproducibility...
February 2, 2017: Spectrochimica Acta. Part A, Molecular and Biomolecular Spectroscopy
https://www.readbyqxmd.com/read/28181723/nanosecond-laser-assisted-nitrogen-doping-of-graphene-oxide-dispersions
#14
Dejan Kepić, Stefania Sandoval, Ángel Pérez Del Pino, Enikö György, Laura Cabana, Belén Ballesteros, Gerard Tobias
N-doped reduced graphene oxide (RGO) has been prepared in bulk form by laser irradiation of graphene oxide (GO) dispersed in an aqueous solution of ammonia. A pulsed Nd:YAG laser with emission wavelengths in the infrared (IR) 1064 nm, visible (VIS) 532 nm, and ultraviolet (UV) 266 nm spectral regions was employed for the preparation of the N-doped RGO samples. Regardless of the laser energy employed, the resulting material presents a higher fraction of pyrrolic nitrogen compared to nitrogen atoms in pyridinic and graphitic coordination...
February 9, 2017: Chemphyschem: a European Journal of Chemical Physics and Physical Chemistry
https://www.readbyqxmd.com/read/28166434/a-systematic-review-of-comparative-studies-of-co2anderbium-yag-lasers-in-resurfacing-facial-rhytides-wrinkles
#15
Kee-Hsin Chen, Ka-Wai Tam, I-Fan Chen, Shihping Kevin Huang, Pei-Chuan Tzeng, Hsian-Jenn Wang, Chiehfeng Cliff Chen
BACKGROUND: Laser resurfacing is used to minimize wrinkles, solar scars, and sequelae of acne. OBJECTIVE: Purpose of the systemic review was to compare resurfacing outcomes of CO2 laser and erbium: yttrium-aluminum-garnet (erb:YAG) laser therapies. METHODS AND MATERIALS: Medline, Cochrane, EMBASE, Google Scholar databases were searched until April 9, 2015 using the following terms: laser, carbon dioxide/CO2, facial wrinkles, rhytides, erbium-doped yttrium aluminum garnet/erbium:YAG/Er:YAG...
February 6, 2017: Journal of Cosmetic and Laser Therapy: Official Publication of the European Society for Laser Dermatology
https://www.readbyqxmd.com/read/28164458/comparison-of-hair-removal-efficacy-and-side-effect-of-neodymium-yttrium-aluminum-garnet-laser-and-intense-pulsed-light-systems-18-month-follow-up
#16
Georgina Zita Szima, Eszter Anna Janka, Anikó Kovács, Blanka Bortély, Edina Bodnár, Irina Sawhney, Éva Szabó, Éva Remenyik
BACKGROUND: Photothermal destruction of hair shaft melanin with intense pulsed light (IPL) and neodymium:yttrium-aluminum-garnet (Nd:YAG) laser has become an effective treatment of hair removal. AIMS: Our aim was to compare efficacy, satisfactory levels, safety, and side effects of Nd:YAG and IPL in hair reduction. METHODS: This was a prospective randomized intrapatient, right-left, assessor-blinded comparison of Nd:YAG vs IPL. There were 38 volunteers recruited...
February 6, 2017: Journal of Cosmetic Dermatology
https://www.readbyqxmd.com/read/28160204/the-effect-of-different-cleaning-methods-on-the-surface-and-temperature-of-failed-titanium-implants-an-in-vitro-study
#17
Sema S Hakki, Gulsah Tatar, Niyazi Dundar, Burak Demiralp
The aims of this in vitro study are to compare the efficacy of different cleaning methods in removing debris of failed implants and to detect thermal changes of the implants treated by various scaling instruments. Twenty-seven failed implants and two unused implants as control were included to this study-group 1: plastic curette (P), group 2: titanium curette (T), group 3: carbon curette (C), group 4: titanium brush (TB), group 5: Er:YAG laser (laser 1 (L1) 100 mJ/pulse at 10 Hz), group 6: Er:YAG laser (laser 2 (L2) 150 mJ/pulse at 10 Hz), group 7: Er:YAG laser (laser 3 (L3) 200 mJ/pulse at 10 Hz), group 8: ultrasonic scaler appropriate for titanium (US), group 9: air abrasive method (AA) + citric acid, and group 10: implantoplasty (I)...
February 4, 2017: Lasers in Medical Science
https://www.readbyqxmd.com/read/28160203/nd-yag-laser-induced-morphology-change-and-photothermal-conversion-of-gold-nanorods-with-potential-application-in-the-treatment-of-port-wine-stain
#18
Linzhuang Xing, Bin Chen, Dong Li, Jun Ma, Wenjuan Wu, Guoxiang Wang
Based on the principle of selective photothermolysis, 1064 nm Nd:YAG laser has great potential for the treatment of deeper and larger PWS. However, the clinical effectiveness is limited because of the weak absorption of blood to Nd:YAG laser. The aim of this study is to obtain the optimal irradiation conditions to effectively destroy vascular lesions with the assistance of PEG-modified gold NRs to enhance blood absorption of Nd:YAG laser. In our study, PEG-modified gold NRs were prepared by the seeded growth method...
February 3, 2017: Lasers in Medical Science
https://www.readbyqxmd.com/read/28158143/44%C3%A2-%C3%A2-mj-2-1%C3%A2-%C3%A2-%C3%AE-m-single-frequency-ho-yag-amplifier
#19
QuanXin Na, Chunqing Gao, Qing Wang, Yixuan Zhang, Mingwei Gao, Qing Ye, Meng Zhang, YuJia Wang
A single-frequency two-stage amplifier delivering up to 44 mJ at 2.1 μm is demonstrated. The first-stage amplifier is double-end-pumped by a 1.9 μm Tm:YLF laser, and is seeded with a 15 mJ single-frequency Ho:YAG laser operating at 200 Hz. The second-stage amplifier is end-pumped by another 1.9 μm Tm:YLF laser. The output pulse width from the second-stage amplifier is 113 ns, with a beam quality of M<sup>2</sup>∼1.32.
February 1, 2017: Applied Optics
https://www.readbyqxmd.com/read/28158098/simultaneous-dual-wavelength-q-switched-nd-yag-laser-at-1052-and-1073%C3%A2-%C3%A2-nm
#20
Haifeng Lin, Wenzhang Zhu, Feibing Xiong, Jianjian Ruan
We report a continuous-wave dual-wavelength Nd:YAG laser at 1052 and 1073 nm, for the first time to the best of our knowledge, in free-running mode. The maximum output power reaches 6.64 W with slope efficiency of about 42.1% with respect to the absorbed power. Inserting a Cr:YAG saturable absorber, the dual-wavelength laser can operate in the Q-switching regime with maximum average output power of 880 mW. The minimum pulse width and the highest pulse repetition rate are 28 ns and 17.12 kHz, respectively. The dual-wavelength laser has potential to generate a 5...
February 1, 2017: Applied Optics
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