نتایج جستجو برای: laser ablation

تعداد نتایج: 224148  

ژورنال: مجله دندانپزشکی 2016
احدی, منا, فکر آزاد, رضا, مجدآبادی, عباس,

Background and Aims: Nowadays lasers are used as alternatives to the tooth preparation because of reducing pain and bloodshed. The aim of this study was to observe the effect of ArF laser on the dental hard tissues. Materials and Methods: For this research human molar teeth with no caries or dental restoration and enamel cracks were used. Irradiation laser energies were taken 95, 70 and ...

Journal: :journal of lasers in medical sciences 0
mohammad karim shahrzad laser application in medical sciences research center, shohada tajrish medical center, shahid beheshti university of medical sciences, tehran, iran

thermal ablation therapies for benign thyroid nodules have been introduced in recent years to avoid the complications of traditional methods such as surgery. despite the little complications and the reportedly acceptable efficacy of thermal ablation methods, quite few medical centers have sought the potential benefits of employing them. this paper provides an introduction to the literature, pri...

Journal: :journal of lasers in medical sciences 0
jing liu center of digital dentistry, peking university school and hospital of stomatology & national engineering laboratory for digital and material technology of stomatology, beijing 100081, china. hu chen center of digital dentistry, peking university school and hospital of stomatology & national engineering laboratory for digital and material technology of stomatology, beijing 100081, china. wenqi ge academy of opto-electronics, chinese academy of sciences, beijing 100094, china yongbo wang shinva medical instrument co.,ltd, zibo, shandong 255086, china yuchun sun center of digital dentistry, peking university school and hospital of stomatology & national engineering laboratory for digital and material technology of stomatology, beijing 100081, china. yong wang center of digital dentistry, peking university school and hospital of stomatology & national engineering laboratory for digital and material technology of stomatology, beijing 100081, china.

introduction: the aim of this study was to evaluate the morphological changes and quantitatively assess the roughness of dentin after the ablation with a ytterbium-doped potassium yttrium tungstate (yb: kyw) thin-disk femtosecond pulsed laser of different fluences, scanning speeds and scanning distances. method: twelve extracted human premolars were sectioned into crowns and roots along the cem...

قنبری, دکتر عباس,

ABSTRACT No comparison exists between laser and other non laser modalities. we have reviewed our 6 years experience in 34 consecutive patients with the endoscopic diagnosis of WMS. All patients were followed up.Coexistent disorders included systemic sclerosis,choronic renal failure ,cirrhosis, rheumatoid arthritis, diabetes mellitus,malignancy . Endoscopic ablation of WMS had been indertaken i...

Abdolhadi Daneshi, Hossain Ghaleh-Noyi, Mehdi Ghaffari, Mousa Taghipour, Reza Ahadi, Reza Alizadeh, Reza Mollahossaini, Sadegh Izadi,

In this study, 22 patients (15-75 years old) were selected and transferred to CT scan for tumor ablation. For ablations, after prep and drep under the local anesthesia and mild sedation in proper position, small incision made and special needle inserted and guided by proper direction to the core of the tumor. Then, laser probe inserted through the needle and laser energy delivered. Although we ...

Journal: :Optics express 2010
Junichi Hamazaki Ryuji Morita Keisuke Chujo Yusuke Kobayashi Satoshi Tanda Takashige Omatsu

Laser ablation of Ta plates using nanosecond optical vortex pulses was carried out, for the first time. It was suggested that owing to orbital angular momentum of optical vortex, clearer and smoother processed surfaces were obtained with less ablation threshold fluence, in comparison with the ablation by a nonvortex annular beam modified from a spatially Gaussian beam.

2014
Sivanandan S. Harilal Justin R. Freeman Prasoon K. Diwakar Ahmed Hassanein

Traditionally nanosecond laser pulses have been used for Laser-induced Breakdown Spectroscopy (LIBS) for quantitative and qualitative analysis of the samples. Laser produced plasmas using nanosecond laser pulses have been studied extensively since 1960s. With the advent of short and ultrashort laser pulses, there has been a growing interest in the applications of femtosecond and picosecond lase...

Journal: :journal of lasers in medical sciences 0
alireza mahboub ahari economics faculty, tehran university of medical sciences, tehran, iran fatemeh sadeghi ghyassi iranian center for evidence based medicine, tabriz university of medical sciences, tabriz, iran mahmoud yousefi economics faculty, tehran university of medical sciences, tehran, iran mohsen amjadi urology department, tabriz university of medical sciences, tabriz, iran ali mostafaie iranian center for evidence based medicine, tabriz university of medical sciences, tabriz, iran

introduction: green light photo selective vaporization of the prostate (pvp) is a minimally invasive method of treatment for clinical benign prostatic hyperplasia with fewer side effects. the aim of this study is to evaluate the safety, effectiveness and cost analysis of pvp compared with transurethral resection of prostate. methods: a systematic search was done in cochrane, trip database, medl...

Journal: :medical hypothesis, discovery and innovation ophthalmology journal 0
ahmad m mansour jose s pulido fernando arevalo

diabetic macular edema (dme) is an important cause of blindness in the working population and is currently challenging to treat. current interventions include focal laser or intravitreal injections. this article outlines a new treatment protocol based on the concept that peripheral ischemia is the introduction to angiogenesis, that will ultimately gather its momentum at the fovea. performing ex...

2001
Koji Sugioka Katsumi Midorikawa

Hybrid laser processing for precision microfabrication of hard materials, in which the interaction of a conventional pulsed laser beam and another medium on the material surface leads to effective ablation, is reviewed. The main role of the medium is to produce strong absorption of the nanosecond laser beam by the materials. Simultaneous irradiation with the ultraviolet (UV) laser beam and the ...

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