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Influence of the electrolyte’s pH on the properties of electrochemically deposited hydroxyapatite coating on additively manufactured Ti64 alloy
National Institute for Optoelectronics, Romania; National Research Tomsk Polytechnic University, Lenin Avenue 43, Tomsk, Russian Federation.
University Politehnica of Bucharest, Romania.
Warmia and Mazury University in Olsztyn, Poland.
Scientific Research Institute of Traumatology, Orthopedics and Neurosurgery, Russia.
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2017 (English)In: Scientific Reports, ISSN 2045-2322, E-ISSN 2045-2322, Vol. 7, no 1, article id 16819Article in journal (Refereed) Published
Abstract [en]

Properties of the hydroxyapatite obtained by electrochemical assisted deposition (ED) are dependenton several factors including deposition temperature, electrolyte pH and concentrations, appliedpotential. All of these factors directly influence the morphology, stoichiometry, crystallinity,electrochemical behaviour, and particularly the coating thickness. Coating structure together withsurface micro- and nano-scale topography significantly influence early stages of the implant biointegration.The aim of this study is to analyse the effect of pH modification on the morphology,corrosion behaviour and in vitro bioactivity and in vivo biocompatibility of hydroxyapatite preparedby ED on the additively manufactured Ti64 samples. The coatings prepared in the electrolytes withpH = 6 have predominantly needle like morphology with the dimensions in the nanometric scale(~30 nm). Samples coated at pH = 6 demonstrated higher protection efficiency against the corrosiveattack as compared to the ones coated at pH = 5 (~93% against 89%). The in vitro bioactivity resultsindicated that both coatings have a greater capacity of biomineralization, compared to the uncoatedTi64. Somehow, the coating deposited at pH = 6 exhibited good corrosion behaviour and highbiomineralization ability. In vivo subcutaneous implantation of the coated samples into the white rats for up to 21 days with following histological studies showed no serious inflammatory process.

Place, publisher, year, edition, pages
2017. Vol. 7, no 1, article id 16819
Keyword [en]
biomedicine, electrochemical coatings, hydroxiapatite, biomineralization, pH
National Category
Metallurgy and Metallic Materials Medical Materials Biomaterials Science
Identifiers
URN: urn:nbn:se:miun:diva-32507DOI: 10.1038/s41598-017-16985-zISI: 000416938200127Scopus ID: 2-s2.0-85036670021OAI: oai:DiVA.org:miun-32507DiVA, id: diva2:1167643
Available from: 2017-12-19 Created: 2017-12-19 Last updated: 2018-03-26Bibliographically approved

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Koptioug, Andrei
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Department of Quality Technology and Management, Mechanical Engineering and Mathematics
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