Propriedades de biocerâmicas porosas de fosfato de cálcio obtidas com matérias-primas de origem orgânica e sintética

AUTOR(ES)
DATA DE PUBLICAÇÃO

2007

RESUMO

Calcium phosphate ceramics applied to bone tissue repair is an option for functional bone wound healing. Calcium phosphate utilized in this work has been originated from calcined bovine bone samples or a commercial brand of biphasic calcium phosphate (BCP). In this work, calcium phosphate added with alkaline carbonates and other raw-materials have been mixed, pressured and sintered to produce ceramic samples with interconnected pores with mean pore size around 120 um which can be helpful for cell tissue growth and blood vascularization. Mercury intrusion porosimetry, X-ray fluorescence and diffraction, optical microscopy, scanning electronic microscopy (SEM), pH measurements, and cell response evaluation by in vitro citotoxity experiments were the characterization techniques used during this investigation. The sinterization process with a liquid phase seem to be useful in producing porous and mild strength ceramic samples. Carbonates specially Li2CO3 act as fluxing agent during liquid-phase sintering of the ceramic samples.

ASSUNTO(S)

1. fosfato de cálcio - teses. 2. hidroxiapatita - teses. 3. porosidade - teses. i. universidade federal de ouro preto. ii. título. processos de fabricacao

ACESSO AO ARTIGO

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