High Power Lasers
Mostrando 1-12 de 31 artigos, teses e dissertações.
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1. Immediate laser-induced hemostasis in anticoagulated rats subjected to oral soft tissue surgery: a double-blind study
Abstract Given the growing trend towards medical indications for continuous use of anticoagulants, the number of patients on these medications continues to rise. The management of patients on oral anticoagulants requiring oral surgical procedures has aroused much controversy. Changes in an anticoagulation regimen are associated with an increased risk of thro
Braz. oral res.. Publicado em: 07/06/2018
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2. Action of AlGaInP laser and high frequency generator in cutaneous wound healing. A comparative study
ABSTRACT PURPOSE: To evaluate in a macroscopic, histological and histomorphometric manner the healing process of cutaneous wounds in mice. METHODS: The sample consisted of 40 male mice and was divided in four groups: 1st group (control, n=10), 2nd group (High Frequency Generator - HF, the maximum amplitude range, 120s, n=10), 3rd group (AlGaInP Laser 660 n
Acta Cir. Bras.. Publicado em: 2015-12
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3. High Power Laser Weapons and Operational Implications
ABSTRACT: The operational implications of high power laser weapons are constantly growing in countries with advanced military technological level. As well as on progress in integration with air, land and naval platforms, this paper discusses the necessary development and implementation of the operational concepts into Armed Forces, which should target orient
J. Aerosp. Technol. Manag.. Publicado em: 2014-09
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4. Efeitos dos lasers de diodo de alta e baixa potência no processo de reparo de reabsorções radiculares após reimplante tardio: análise clínica e radiográfica em ratos / Effects of high and low diode power lasers in process of heal of root resorptions in delayed replanted: clinical and radiographic analysis in rats
Objetivo: Avaliar clínica e radiograficamente os efeitos da irradiação com laser de diodo de alta potência e de baixa potência em dentes de ratos, reimplantados tardiamente. Método: Foram utilizados incisivos direitos de cinquenta ratos (Wistar) com peso entre 250 a 350g. Os dentes foram extraídos, permanecendo em meio ambiente durante 60min. Em segui
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 15/06/2012
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5. Efeito da terapia fotodinâmica no tratamento da estomatite sob prótese em usuários de próteses totais / Effect of photodynamic therapy on denture stomatitis in complete denture wearers
Denture stomatitis is pathological condition in complete or partial denture wearers caused by Candida spp. In the present, the major concern is to promote a proper health condition. Thus, many hygiene methods and treatments for elimination of Candida have been studied. The incidence of candidiasis is high in patients with low immune system, elderly and infan
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 08/07/2011
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6. Análise morfológica e da resistência adesiva dos tecidos dentais duros irradiados com lasers de pulsos ultracurtos / Evaluation of dental hard tissues irradiated with ultra-short pulsed lasers. Influence on surface morphology and microtensile bond strength
The development of restorative dentistry has reached the era of esthetic adhesive restorations and minimally invasive approach, for which innovative techniques and advanced materials are constantly introduced. Conservative techniques aim not only to remove carious dental substrate, but also to prepare cavity surfaces for adhesive restoration. The main object
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 16/09/2010
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7. Leucoplasia oral: tratamento cirúrgico com laser de CO2 e de diodo e análise por imuno-histoquímica da expressão de proteínas relacionadas à carcinogênese (p53, COX-2 e EGFR) / Oral leukoplakia: surgical treatment with CO2 and diode lasers and analysis of the expression of proteins related to carcinogenesis (p53, COX-2 e EGFR) by immunohistochemistry
Oral leukoplakia (OL) is a potentially malignant lesion, defined as a white patch that cannot be characterized as any other disease of the oral mucosa. In general, OL should be treated; however no treatment available has been able to prevent malignant transformation. The aim of this study was to evaluate the efficacy of surgical treatment with CO2 and diode
Publicado em: 2010
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8. Emissão laser em meios espalhadores com ganho: estudos experimentais em soluções etanóicas e aquosas
The approach of this thesis is study the laser emission from highly scattering media with gain with incoherent feedback. These systems are called of random lasers and diverge from the typical laser, because they can emit monochrome light with high intensity without a cavity. We detail several experimental studies in samples containing different rhodamines in
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 22/01/2009
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9. Desenvolvimento de um laser de Nd:YLF bombeado por diodo laser e duplicado em frequencia para 657 nm / Development of a diode pumped Nd:YLF laser, frency doubled to 657 nm
Atomic clocks are used today in a number of scientific and technological applications, ranging from tests of relativity, or variations of fundamental constants, to the use in navigation and telecommunication. The next generation of such high precision devices will be based on optical transitions of suitable laser cooled and trapped atoms. In this work we des
Publicado em: 2009
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10. In vitro evaluation of the Nd:YAG and Er:YAG lasers irradiation on the root sealing with different root canal filling cement / Avaliação In vitro da irradiação com laser de Nd:YAG e Er:YAG no selamento radicular, variando-se o cimento obturador do sistemas de canais radiculares
The aim of this in vitro study was to analyze two high power lasers irradiation effects before the root canal filling procedure with resin endodontic cements on the lateral sealing. Thirty-six permanent human molars were endodontically treated and randomly assigned in nine experimental groups (n=4) according with the subsequent dentin treatment. The groups w
Publicado em: 2009
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11. Otimização da eficiência do modo TEM00 em lasers de Nd:YLF de alta potência bombeados lateralmente / TEM00 MODE EFFICIENCY ENHANCEMENT IN HIGH POWER DIODE-SIDEPUMPED Nd:YLF LASERS
For many laser applications high beam quality in fundamental mode is necessary. In this work we study the conditions that achieve high efficiency and high beam quality by optimizing the overlap between the fundamental mode and the excited region inside the active medium, using novel cavities. The highest efficiency reported so far for diode side pumped 1053
Publicado em: 2008
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12. Laser de Nd:YLF para aplicações em LIDAR / LASER DE Nd:YLF PARA APLICAÇÕES EM LIDAR
A utilização de lasers de estado sólido bombeados por diodos laser tem atraído interesse crescente devido a sua alta eficiência, seu tamanho compacto e com a possibilidade da operação com altas potências-pico. O objetivo deste trabalho foi estudar configurações de cavidades ressonantes laser, que possibilitem a obtenção de pulsos chaveados Q e fu
Publicado em: 2008