نتایج جستجو برای: laser

تعداد نتایج: 183632  

تقی زاده دلخوش, سیروس, فاطمی, الهام, قربانی, راهب, محمدی, رقیه,

Background and purpose: Osteoarthritis is the most common type of arthritis. It is the main cause of chronic musculoskeletal pain and disability in elderly population. The aim of this research was to compare the effects of low-level laser therapy (LLLT) and high-intensity laser therapy (HILT) on pain relief and reducing disability in patients with knee osteoarthritis. Materials and methods: A ...

Alireza Heiran, Farideh Jowkar, Najmeh Radgoodarz Nasrin Saki

Background: Laser treatment is a rapid, non-invasive procedure for long-term hair removal. Lasers operate based on the principle of selective photothermolysis and target melanin in the hair follicle. We intend to determine the level of hirsute patient satisfaction with the alexandrite laser hair removal procedure.Methods: In this cross-sectional study 82 hirsute patient...

Aryabod Elham

Introduction: In laser surgery, the laser beam can evaporate and cut the tissue like a small surgical knife when the tissue temperature is heated to 100 degrees Celsius. a complete understanding of the distribution of damage in both pathologic tissue and surrounding tissue is necessary. Although the test is the most realistic solution for treating medical problems, for this rea...

H Pazokian, J Barzin, M Mollabashi, S Jelvani, SH Abolhoseini,

Laser irradiation parameters, especially the laser fluence and the number of pulses are very important factors affecting microstructures formation and improvement of the surface characteristics in different medical, electronic and the other industrial applications. Information about the fluence domain and the number of pulses for the formation of the structures is very important and determines ...

In this article, M2 factor of a thin disk laser with unstable resonator in two regimes is calculated numerically. In the first case, thermal effects are ignored and the parameters of beam width, divergence angle, radius of wave front curvature and finally, M2 factor of laser beam are calculated by using generalized beam parameters. These calculations show that the beam quality of the laser is d...

This article studies the particle temperature distribution depending on the laser radiation power and the particle’s trajectory and velocity. The uneven heating of particles moving in the laser radiation field is identified. The regimes of laser heating without melting, with partial melting, and with complete particle melting are considered.

Introduction: Nowadays, the main focus of dental studies is on adhesive dental materials; since clinical long-term success of bonded restorations depended more on marginal microleakage minimization. So, the aim of this study was Evaluation of Diode laser irradiation effect on microleakage in class V composite restoration before and after adhesive application. Materials and methods: In this in v...

ژورنال: بیهوشی و درد 2012
رحیمی, زهرا, سوسن ابادی, علیرضا, طالبی, هوشنگ, یزدی, بیژن,

                            Aim and Background:   Knee osteoarthritis (OA) is a prevalent and disabling disease. Periarticular corticosteroid injection has been traditionally used for the pain control in these patients. Recently low power laser has been introduced as a therapeutic option. This study was conducted to evaluate the efficacy of Low pow...

Mojtaba Namdar, Reza Fekrazad, Samaneh Razeghi, Sara Ghadimi,

Background and Aim: Previous studies revealed improved enamel caries resistance after laser irradiation. Present in vitro study evaluated the effect of Er,Cr:YSGG laser with or without topical fluoride application on microhardness of primary enamel after artificial demineralization. Materials and Methods: In this in vitro study, 35 primary molars with sound surfaces were bisected and randomly ...

Background and Aim: Lasers can serve as a new powerful tool in dentistry. High intensity laser therapy is becoming the treatment of choice compared with conventional periodontal therapy due to accurate incision and soft and hard tissue ablation, hemostasis, reduction of postoperative pain and infection, optimal debridement, and enhanced healing. Although high intensity laser therapy assumes to ...

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