509 resultados para Densidade óssea
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Pós-graduação em Zootecnia - FMVZ
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Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)
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Pós-graduação em Biopatologia Bucal - ICT
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Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)
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Pós-graduação em Ciência e Tecnologia de Materiais - FC
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The aim of this study was to evaluate the influence of the bed in High Density Porous Polyethylene (Medpor) implants integration. Two different kind of beds -- corticalized and decorticalized -- were made in six dogs. The animals were killed thirty, sixty and ninety days after implantation. Blocks including implant and adjacent bone were harvested, submitted to histological procedures, stained in hematoxiline-eosine and analyzed in optic microscope. The results demonstrated an absence of infection and foreign body reaction associated with High Density Porous Polyethylene (Medpor) implants. Furthermore, bony and fibrovascular ingrowth could be observed into its pores. The best integration was noted in decorticalized group, in which occurred a greater bony and fibrovascular ingrowth in comparison to the corticalized group
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Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
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Due to complications caused by metallic implants in the replacement of bone tissue, the biological application of ceramics raised and became a viable alternative. The titania has the ability to promote bone tissue regeneration based on its structure, mechanical and biologically properties compatibility. The present work aims at obtaining and characterization of Titania (TiO2) porous ceramics produced by the polymeric sponge method (replica method). Polyurethane sponge with 10 ppi and 15 ppi (pores per linear inch) were used. The process differentiation is the air blower used to remove excess slurry. The ceramics sponges were dried in an oven, then pre-sintered at 1000 o C and sintered at 1450 o C. The effect of direct sintering at 1450 o C was also assessed. The percentage of solids used to prepare the slurry was 40 to 45% by weight. To increase the surface porosity of the sponge, 20% of starch was added. There was difficulty on controlling the thickness of the slurry layers on the sponge which resulted in the variation of samples mechanical resistance. Despite this, the results obtained are quite promising for the proposed use, indicating that it is possible to obtain titania sponges with an apparent porosity of around 60%, a bulk density ranging from 40 to 47% and a compressive strength resistance – that with better control of layers depositions – can vary from 1 to 4 MPa
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Pós-graduação em Odontologia - FOA
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Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)
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Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
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Pós-graduação em Ciências Fisiológicas - FOA
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Pós-graduação em Fisioterapia - FCT
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Pós-graduação em Medicina Veterinária - FCAV
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Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)