Journal
JOURNAL OF MATERIALS RESEARCH
Volume 34, Issue 11, Pages 1868-1878Publisher
CAMBRIDGE UNIV PRESS
DOI: 10.1557/jmr.2019.23
Keywords
electrochemical synthesis; biomimetic (assembly); nanostructure
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Funding
- CNPq (Conselho Nacional de Desenvolvimento Cientifico e Tecnologico)
- FACEPE (Fundacao de Apoio a Pesquisa do Estado de Pernambuco)
- CAPES (Coordenacao de Aperfeicoamento Pessoal de Nivel Superior)
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Obtention of titanium (Ti)- and titanium dioxide (TiO2)-based nanocomposites is of great interest for biological nanomaterial applications, including for dental implants. Their mechanical properties can be improved by use of hydroxyapatite (HA) and chitosan through their biological anchorage with osseointegration and antibacterial activity. Electrochemical methods were chosen to obtain these composites in a quick and controllable way. In this work, electrochemical synthesis in one (alternated potential) or two steps (alternated or constant potential) was successfully applied. The single step (SS) obtained TiO2 + HA sample had different optical properties, as shown using ultraviolet-visible spectrometry, and the HA phase formation was proved using Raman spectroscopy. Thereby, SS_TiO2 + HA increased the corrosion resistance of titanium in artificial saliva medium, as shown by linear polarization and electrochemical impedance spectroscopy results. When using chitosan, the samples showed two corrosion interfaces, indicating its dissolution in human medium. These results indicate that the samples are excellent materials for dental implants.
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