Resumo

GARCIA, CARLOS; GARCIA, CLAUDIA  e  PAUCAR, CARLOS. In Situ FORMATION OF ZIRCONIA IN THE BONE SUBSTITUTE SYNTHESIS BASED ON ALUMINA-ZIRCON MATRIZ INFILTRATED WITH HYDROXYAPATITE. Dyna rev.fac.nac.minas [online]. 2010, vol.77, n.162, pp.143-149. ISSN 0012-7353.

The development of materials capable to satisfy the requirements of a bone substitute is a great scientific and technological challenge from the point of view of biocompatibility as much as the porous microstructure control that promotes osteointegration and improves the implant mechanical performance. In this work, the preparation of macroporous materials through the repeated use of the infiltration technique with ceramic suspensions is presented. The obtained materials were characterized by X ray diffraction (XRD), scanning electron microscopy (SEM), water absorption measurements and compressive strength tests. It was found that commercial polyurethane foam infiltration with mixed alumina and zircon suspensions allows the In-situ transformation of zirconia into a matrix with similar porosity to the original foam. The matrix infiltrated with hydroxyapatite showed pore diameters of 300 mm and an average compressive strength of 5,44 ± 0,94 MPa, both characteristics are typical of a well bone substitute.

Palavras-chave : bone substitute; zirconia; infiltration; porosity and compressive strength.

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