نتایج جستجو برای: ndyag laser
تعداد نتایج: 183633 فیلتر نتایج به سال:
هدف: این مطالعه به منظور بررسی میزان اثربخشی fractional co2 laser در درمان اسکار انجام شده است. روش مطالعه: این مطالعه به صورت یک clinical case series انجام شده است. حجم نمونه مورد بررسی شامل 81 بیمار مبتلا به اسکار بود که طی سال 1388 جهت درمان به کلینیک های درماتولوژی در سطح شهر تهران مراجعه نموده بودند.یافته ها: میانگین میزان پاسخ به درمان در هر جلسه لیزردرمانی 26/29 درصد بود. 20 نفر (7/24 د...
ازآنجاییکه تهیه آب سنگین با خلوص بالا نیاز به تکنولوژی پیشرفته و صرف هزینه زیاد دارد، انتخاب درصد خلوص این سیال از دیدگاه اقتصادی حائز اهمیت می باشد. بدین منظور آب سنگین با خلوص 5ˆ99 درصد که پایین ترین حدمناسب برای صنعت هسته ای (nuclear grade) می باشد، انتخاب گردیده است . پس از بررسی فیزیک شبکه های آب سنگین، محاسبات اولیه بهینه یابی گام شبکه و شعاع میله سوخت با بهره گیری از روابط تجربی و نوشتن ...
Background and purpose: Prevention of dental caries is one of the primary goals in dentistry. Application of fluoride decreased dental demineralization but the preventive ability of this fluoride is limited. Nowadays different investigations into dental erosion focused on the preventive effect of laser irradiation. The purpose of this applied study was to assess the effect of diode laser (&lamb...
This paper deals with the experimental results of a xenon flash-lamp pumped passively Q-switched Nd:YAG laser using Cr4+:YAG saturable absorber. The need of a laser cavity to be integrated into a time-of-flight laser range finder is of great interest as an experimental investigation of several laser resonators. Two types of laser resonator, with different lengths, have been studied: the flat-fl...
Nowadays laser is extensively used in various industrial, communicative, medical, and other fields. Using laser in medicine has enabled physicians to perform the most accurate and finest operations within few minutes. Non-observance of safety points during laser performance could be seriously harmful for the medical staff and the patient. Therefore, in order to prevent the possible damage of th...
Purpose: The aim of present study is to evaluate the effect of a pulsed infrared low-level laser on wound healing in an experimental induced diabetic rat model.Materials and Methods: 18 adult rats were divided into 2 healthy and 1 diabetic groups. Diabete was induced by intraperitoneal administration of streptozotosin in diabetic group. Two full - thickness skin incisions were made on the dorsu...
Introduction: Today, laser technology is an integral part of medicine, medical malpractice is a major problem in healthcare systems.the purpose of present study was investigation of common causes of injuries, claims, and decisions related to medical malpractice claims related to Laser-therapy. Methods: investigation of legal documents in the coroner’s Office of Forensic Medicine, province of Te...
Background and Aim: The conventional procedure for removal of porcelain laminate veneers (PLVs) is time-consuming and inconvenient. The purpose of this study was to evaluate the efficacy of Er:YAG laser for debonding of PLVs. Materials and Methods: Forty-eight intact extracted human maxillary anterior teeth received discoid PLVs (24 feldspathic and 24 e-max ceramic). The PLVs had 0.7 mm thickn...
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...
نمودار تعداد نتایج جستجو در هر سال
با کلیک روی نمودار نتایج را به سال انتشار فیلتر کنید