نتایج جستجو برای: he laser
تعداد نتایج: 338897 فیلتر نتایج به سال:
background: the effectiveness of low power lasers on incisional wound healing, because of confl icting results of previous studies, is uncertain. therefore, the aim of this study was to evaluate the effects of low-level helium-neon (he-ne) laser irradiation on wound healing in rat’s oral mucosa. materials and methods: sixty-four standardized incisions were carried out on the buccal mucosa of 32...
Purpose: The reaction of compact bone of diaphyse of tibia and it's bone marrow to low power laser radiation was investigated. Materials and Methods: Ten adult male rabbits were divided randomly into experimental and control groups. Low-power He-Ne laser (36 J/cm2) were radiated into a fixed point of tibia daily for 14 consequative days. Rabbits of control group did not receive laser. At the e...
Purpose: The aim of the present study is to investigate the effect of low-power Helium-Neon laser (LPL) on collagen fibril thickness of incisized medial collateral ligament of knee joint (MCL) in rat. Materials and Methods: MCL of right hind limb of 35 male adult sprague Dawley rat under general anesthesia were transversly incisized. Rats were randomly divitded into normal, control, first lase...
the nervous system has an important and vital role in the human body, but unfortunately the repairment of damaged nervous tissue is very slowly. for a long time, the scientists have been involved in finding ways to speed up this process. radiation of low power he-ne laser has been suggested to as a way to improve this issue. in this study, 20 rats were divided randomly into control and case gro...
any change in the refractive index of a laser active medium can lead to serious degradation of beam quality, laser beam modes, laser performance and variation in the intensity distribution. alteration in the refractive index of laser active medium is especially notable in high power lasers. it is clear that in the laser beam production, the pumping agent induces a great amount of heat which...
Purpose: The aim of the present study was to evaluate the effect of low-level He-Ne laser irradiation on Achilles tendon healing in streptozotocin (STZ) induced diabetic rats by a biomechanical evaluating method.Materials and Methods: 33 male adult rats were used for tensiometerical examination. Rats were divided into healthy and diabetic groups. Diabetes was induced by STZ injection. Right Ach...
Power output fluctuations at frequencies in the kHz to MHz range are commonly observed in gas lasers. In case of the cataphoretic He-Cd laser violent fluctuations of the order 50% peak to peak can occur [1]. This noise appears to be different in nature from e.g. He-Ne laser noise [2]. Its origin was attributed to neutral cadmium vapor density fluctuations [3] and to the coupling of Penning elec...
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