نتایج جستجو برای: laser energy
تعداد نتایج: 833768 فیلتر نتایج به سال:
Background and Objective: There is a strong relationship between trigger points with neck pain and headache. This study aimed to compare the effects of muscle energy technique using low-level laser on reducing neck and shoulder pain and disability in patients with myofascial trigger points in the upper trapezius and levator scapula muscles. Materials and Methods: This double-blinded randomized ...
Purpose: The aim of present investigation was to determine the effects of low- level He-Ne laser therapy on biomechanical property of skin wound of healthy and streptozotocin induced diabetic (STZ-D) rats. Materials and Methods: The study was performed by experimental method.36 male adult Wistar rats weighing above 250 gr. were used. Rats were divided equally into control and experimental group...
introduction: this study aimed to assess the scanning electron microscope (sem) analysis of tooth surface irradiated by erbium:yttrium–aluminum–garnet (er:yag) laser with various parameters. methods: number of 25 extracted human third molars free of caries were used in this study. the teeth were put into 5 groups for laser irradiation as follows: group 1 (power: 0.5 w, energy: 50 mj); group 2 (...
nanocomposite materials, including noble metal nanoparticles embedded in a dielectric host medium, are interesting because of their optical properties linked to surface plasmon resonance phenomena. for studding of nonlinear optical properties and/or energy transfer process, these materials may be excited by ultrashort pulse laser with a temporal width varying from some femtoseconds to some hund...
In this paper, the influence of initial momentum and the injection angle of electron in to the magnetized plasma in a laser wake-field accelerator have been studied.It has been seen that the use of external magnetic field in the opposite direction of laser pulse propagation leads to an increase in the wake-field amplitude and a decrease in laser pulse group velocity in comparison to the use of ...
a three-step selective photo-ionization for gd155 and gd157 isotopes by pulsed laser wasevaluated numerically. due to large thermal neutron absorption cross sections, these two isotopes innatural gadolinium are good candidates as burnable poison to control reactivity early in the fuel cycleand allow extended fuel burn up. rate equations have been used to calculate the dynamics of the isotopepop...
Background: knee osteoarthritis is one of the most common causes of chronic disability in the elderly. Despite the widespread application of low energy laser for pain treatment there is much controversy about its efficacy. The aim of this study was to investigate the analgesic effects of low energy laser in patients with knee osteoarthritis along with drug therapy and non - drug therapy in Tabr...
Nanocomposite materials, including noble metal nanoparticles embedded in a dielectric host medium, are interesting because of their optical properties linked to surface plasmon resonance phenomena. For studding of nonlinear optical properties and/or energy transfer process, these materials may be excited by ultrashort pulse laser with a temporal width varying from some femtoseconds to some hund...
a laser is a collimated single wavelength of light which delivers a concentrated source of energy. soon after different types of lasers were invented, investigators began to examine the effects of different wavelengths of laser energy on oral tissues, routine dental procedures and experimental applications. orthodontists, along with other specialist in different fields of dentistry, can now ben...
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 ...
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