This study evaluated the radioprotective effect of sodium selenite on the bone repair process in tibiae of female rats. For such purpose, 100 female Wistar rats (Rattus norvegicus, albinus) were randomly assigned to 4 groups (n=25), according to the treatment received: administration of distilled water (control); administration of sodium selenite; gamma radiation; and administration of sodium selenite plus gamma radiation. A bone defect was prepared on both tibiae of all animals. Three days after surgery, the gamma radiation and selenium/gamma radiation groups received 8 Gy gamma rays on the lower limbs. Five animals per group were sacrificed 7, 14, 21, 28 days after surgery for evaluation of the repair process by bone volumetric density analysis. The 5 animals remaining in each group were sacrificed 45 days postoperatively for examination of the mature bone by scanning electron microscopy. Based on all analyzed parameters, the results of the present study suggest that sodium selenite exerted a radioprotective effect in the bone repair of tibia of irradiated rats.
Estudo de caráter observacional, transversal, descritivo, com abordagem quantitativa, com o objetivo de avaliar as implicações bioéticas decorrentes da iniquidade socioeconômica em relação à distribuição de equipamentos de imagem na saúde pública brasileira. Foi encontrado resultado significante quando relacionado o número de equipamentos de diagnósticos por 100.000 habitantes e a porcentagem da população com renda inferior a meio salário-mínimo. Apenas dois estadosofereceram ótimas ofertas de equipamentos por imagem na rede do sistema público de saúde e baixos índices de extrema pobreza. Na perspectiva bioética, a má distribuição de equipamentos de diagnóstico por imagem pode ser vista como uma iniquidade gerada pela gestão pública.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.