Functionalizing Diatomite-Based Micro-Arc Coatings for Orthopedic Implants: Influence of TiO2 Addition
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Published:2023-06-29
Issue:3
Volume:8
Page:280
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ISSN:2313-7673
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Container-title:Biomimetics
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language:en
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Short-container-title:Biomimetics
Author:
Kashin Alexander D.1, Sedelnikova Mariya B.1, Uvarkin Pavel V.1, Ugodchikova Anna V.12, Luginin Nikita A.1ORCID, Sharkeev Yurii P.13ORCID, Khimich Margarita A.4ORCID, Bakina Olga V.4
Affiliation:
1. Laboratory of Physics of Nanostructured Biocomposites, Institute of Strength Physics and Materials Science of SB RAS, Tomsk 634055, Russia 2. Laboratory of Plasma Synthesis of Materials, Troitsk Institute for Innovation & Fusion Research, Moscow Region, Troitsk 108840, Russia 3. Research School of High-Energy Physics, National Research Tomsk Polytechnic University, Tomsk 634050, Russia 4. Laboratory of Nanobioengineering, Institute of Strength Physics and Materials Science of SB RAS, Tomsk 634055, Russia
Abstract
The method of micro-arc oxidation has been utilized to synthesize a protective biocompatible coating for a bioresorbable orthopedic Mg implant. This paper presents the results of comprehensive research of micro-arc coatings based on diatomite—a biogenic material consisting of shells of diatom microalgae. The main focus of this study was the functionalization of diatomite-based micro-arc coatings by incorporating particles of titania (TiO2) into them. Various properties of the resulting coatings were examined and evaluated. XRD analysis revealed the formation of a new magnesium orthosilicate phase—forsterite (Mg2SiO4). It was established that the corrosion current density of the coatings decreased by 1–2 orders of magnitude after the inclusion of TiO2 particles, depending on the coating process voltage. The adhesion strength of the coatings increased following the particle incorporation. The processes of dissolution of both coated and uncoated samples in a sodium chloride solution were studied. The in vitro cell viability was assessed, which showed that the coatings significantly reduced the cytotoxicity of Mg samples.
Funder
Russian Science Foundation
Subject
Molecular Medicine,Biomedical Engineering,Biochemistry,Biomaterials,Bioengineering,Biotechnology
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