Lanthanum-silicate-substituted apatite synthesized by fast mechanochemical method: Characterization of powders and biocoatings produced by micro-arc oxidation.

Author(s) Bulina, N.V.; Chaikina, M.V.; Prosanov, I.Yu; Komarova, E.G.; Sedelnikova, M.B.; Sharkeev, Y.P.; Sheikin, V.V.
Journal Mater Sci Eng C Mater Biol Appl
Date Published 2018 Nov 01
Abstract

Lanthanum-silicate substituted apatite with equal concentrations of the substituents in the range of 0.2-6.0 mol were produced by a fast method - mechanochemical synthesis. This method makes it possible to synthesize a nanosized single-phase product by activating reaction mixtures containing CaHPO, CaO, La(OH) and SiO·HO for 25-30 min in AGO-2 and AGO-3 planetary mills. The structure of the apatites was investigated by the FTIR and XRD methods. It was found that the synthesized samples with substituent concentrations up to 2 mol are substituted oxy-hydroxyapatites, at higher concentrations, they are substituted oxyapatites. The mechanochemically synthesized apatite with a substituent concentration of 0.5 mol was used for depositing biocoatings on titanium substrates by the micro-arc oxidation method. The structure of the coatings is mainly amorphous. In vitro biological tests demonstrated high biocompatibility of the coatings and the absence of cytotoxic action on mesenchymal stem cells.

DOI 10.1016/j.msec.2018.06.057
ISSN 1873-0191
Citation Mater Sci Eng C Mater Biol Appl. 2018;92:435446.

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