نتایج جستجو برای: ysgg laser
تعداد نتایج: 183766 فیلتر نتایج به سال:
Laser bending is an advanced process in sheet metal forming in which a laser heat source is used to shape the metal sheet. In this paper, temperature distribution in a mild steel sheet metal is investigated numerically and experimentally. Laser heat source is applied through curved paths in square sheet metal parts. Finite element (FE) simulation is performed with the ABAQUS/CAE standard softwa...
Background Recently, the clinical use of low power lasers has increased, and it is said that wound healing is accelerated by their irradiation. The aim of this study was evaluation of the effect of platelet-rich plasma on proliferation and differentiation of human dental pulp stem cells with or without Ga-Al-As laser. Methods: In this experimental study, human lower third molar dental pulp c...
هدف: این مطالعه به منظور بررسی میزان اثربخشی fractional co2 laser در جوان سازی پوست انجام شده است. روش مطالعه: این مطالعه به صورت یک clinical case series انجام شده است و حجم نمونه مورد بررسی شامل 59 خانم بود که بطور متوالی از بین بیماران مراجعه کننده به کلینیک های پوست و لیزر در سطح شهر تهران در سال 1388 انتخاب شدند. یافته ها: درصد بهبودی در نخستین فالوآپ به طور میانگین 03/85 درصد با انحراف م...
Objective: The aim of this study was to evaluate and compare the effect of dental surface treatment with Er:YAG , Nd:YAG ,CO2 lasers and sodium ascorbate to recently laser bleached enamel by scanning electron microscope (SEM). Methods: 15caries-free extracted human third molars were selected for this study. The samples were bleached by Heydent JW power activated by diode laser 810 nm. After 7 d...
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...
Introduction:Distal symmetric polyneuropathy was the most common diabetic neuropathy that caused to significant disability. Sever pain, decrease and absence of sense and increase risk of ulcer and amputation were the complication of diabetes. Several therapeutic modalities used for pain control in these patients but none of them didn't provide complete consensually of patients. The aim of this ...
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...
Background and Aim: Undesirable appearance of the scar tissue after aesthetic surgery can affect the outcomes and patient satisfaction. In recent years, early laser therapy had been encouraged to reduce the scar tissue formation. However, the available evidence regarding the outcomes of laser therapy utilizing combined lasers are limited. In the current study, the effects of combined laser ther...
Tailor-made blanks are sheet metal assemblies with different thicknesses and/or materials and/or surface coatings. A monolithic sheet can be machined to make the required thickness variations that is referred as tailor machined blanks. Due to the thickness variation in tailor machined blanks, laser bending of these blanks is more complicated than monolithic plates. In this article, laser formin...
the minimal invasive nature of lasers, with quick tissue response and healing has made them a very attractive technology in various fields of dentistry which serves as a tool to create a better result than ever before. the rapid development of lasers and their wavelengths with variety of applications on soft and hard tissues may continue to have major impact on the scope and practice in prosthe...
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