RESUMOO trauma facial é uma situação clínica que pode apresentar-se como um quadro de urgência e/ou emergência no cotidiano das unidades de pronto atendimento e hospitais do mundo inteiro, principalmente em localidades com altos índices de violência e infrações de trânsito. Objetivo: avaliar a prevalência das fraturas dos ossos da face na população brasileira a partir de estudos epidemiológicos dos últimos 5 anos, sendo analisados os fatores relacionados a ocorrência do trauma, correlacionando informações de etiologia, gênero, idade e região óssea atingida. Metodologia: Esse estudo configurase na forma de revisão de integrativa, elucidado de forma descritiva com análise de prevalência do trauma no complexo maxilofacial e fatores clinico-epidemiológicos na população brasileira (etiologia, localização, frequência, classificação e gênero). A seleção dos artigos para a composição da amostra foi realizada a partir das bases de dados da SCIELO e PUBMED utilizando descritores nos idiomas inglês e português, a partir do ano 2015. Resultados: O principal fator etiológico relacionado as fraturas foram os acidentes de trânsito (15 artigos, 83,3%) que compreendem também os acidentes automobilísticos e motociclísticos, em segundo lugar foram as agressões físicas (03 artigos, 16,6%), acidentes esportivos, quedas e acidentes de trabalho também foram mencionados. Os ossos mais fraturados foram a mandíbula, seguido do complexo zigomático e os ossos nasais. Conclusão: Através deste estudo podemos concluir que o perfil epidemiológico dos pacientes vítimas de fraturas no complexo maxilofacial é constituído por homens com idade dentro da segunda e quarta década de vida, envolvidos em acidentes de trânsito, conduzindo motocicletas, sendo o osso mandibular o osso mais acometido de fratura dentre os ossos da face.
Fuel cells are one of the most efficient and effective solutions to environmental problems and high energy demand. They are devices which change chemical energy into electrochemical energy, allowing much higher efficiency than conventional thermomechanical conversion methods. Lanthanum Strontium Cobalt Ferrite (LSCF) perovskites have been widely studied for application as cathodes in solid oxide fuel cells (SOFC) due to their high electrical conductivity, high thermal and chemical stability, low difference in thermal expansion coefficient, and physico-chemical compatibility with the other cells components. The aim of this work was to synthesize perovskitas type La0.7Sr0.3Co0.5Fe0.5O3 by sol-gel method and evaluate the potential for application as a cathode for fuel cell. The results obtained by X-ray powder diffraction (XRD) indicate that the sol-gel method calcined at 900ºC obtained an amount of the perovskite phase above 95%. The Field Emission Gun-Scanning Electron Microscope (FEG-SEM) images of LSCF film produced with 4 layers showed a better quality. Thus, the results obtained by XRD and FEG-SEM, indicate that the sol-gel method calcined at 900ºC has a potential application as cathode in solid oxide fuel cells.
The objective of this study was to report a clinical case of periapical pathosis at the maxillary anterior region which was resistant to conventional endodontic treatment and discuss the contribution of the magnetic resonance imaging (MRI) to the diagnostic process. Female patient aged 43 years old was referred to specialised dental care following unsuccessful endodontic treatment of tooth #11, which had been carried out after presumptive diagnosis of granuloma or root cyst. For a better evaluation, periapical radiography, cone beam computed tomography and MRI exam were all indicated. By means of these exams, one could observe the presence of another lesion at the region of tooth #13, which was suggestive of residual cyst. On MRI scan, the T2WI of the lesions showed hypersignal areas compatible to inflammatory process. Surgery excision of the lesions and apicoectomy of tooth #11 were the treatments chosen, including further referral for histopathological exam. Final diagnosis of both lesions was non-specific inflammatory process or dental granuloma. Clinical-radiographic control showed area of new bone formation, thus evidencing bone repair process. One can conclude that the diagnosis and treatment of periapical pathoses may be challenging and that MRI contributed by providing important information on the nature and content of these lesions.
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