Abstract

COPETE, HAMILTON et al. IN VITRO EVALUATION OF OXY-FUEL THERMAL SPRAYED HYDROXYAPATITE COATINGS ONTO Ti6Al4V SUBSTRATES. Dyna rev.fac.nac.minas [online]. 2013, vol.80, n.177, pp.101-107. ISSN 0012-7353.

Coatings were elaborated onto Ti6Al4V substrates using the oxyacetylene flame spraying process from hydroxyapatite synthesized by precipitation and calcination to 850 °C. The phases in the hydroxyapatite powders and coatings were determined by X Ray Diffraction. The surface of coating was exposed to in vitro condition using a Simulated Biological Fluid (SBF), which was heated to 37 °C. The in vitro tests were realized during 3, 7, 15 and 30 days. The surface of coatings was evaluated before and after the in vitro tests, by Scanning Electron Microscopy and chemical microanalysis was realized by Energy Dispersive X-Ray Spectroscopy, while the phosphate and calcium ions in the SBF were determined by spectrophotometry. The in vitro tests results indicate that phosphate and calcium ions were dissolved from the surface of coating to fluid and then, calcium phosphate crystals were precipitate on the coatings.

Keywords : Hydroxyapatite; Thermal Spraying Process; Biomaterial; In vitro test.

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