Hybrid coatings for orthopaedic implants formed by physical vapour deposition and microarc oxidation

0560431 - FGÚ 2023 RIV GB eng J - Journal Article
Gabor, R. - Cvrček, L. - Doubková, Martina - Nehasil, V. - Hlinka, J. - Unucka, P. - Buřil, M. - Podepřelová, A. - Seidlerová, J. - Bačáková, Lucie
Hybrid coatings for orthopaedic implants formed by physical vapour deposition and microarc oxidation.
Materials and Design. Roč. 219, July (2022), č. článku 110811. ISSN 0264-1275. E-ISSN 1873-4197
R&D Projects: GA ČR(CZ) GA20-01570S
Institutional support: RVO:67985823
Keywords : Ti-6Al-4V * PVD coating * MAO process * corrosion protection * tribology * mesenchymal stem cells
OECD category: Biomaterials (as related to medical implants, devices, sensors)
Impact factor: 8.4, year: 2022
Method of publishing: Open access
https://doi.org/10.1016/j.matdes.2022.110811

This study is focused on the preparation of new hybrid layers intended for surface modification of Ti-6Al-4V alloys for potential orthopaedic and dental applications. Combination of the technology of physical vapour deposition (PVD) and subsequent micro-arc oxidation (MAO) was utilized for the deposition of Ti and ZrTi to form hybrid oxide layers. The oxide layers were prepared using an alkaline electrolyte with glycerol as an additive under micro-arc discharge conditions with different Si content on their surfaces. The hybrid ZrTi coatings with a Zr/Si structure achieved the best tribological properties described by a low friction coefficient of 0.3 and high abrasion resistance. There was also an increase in corrosion potential and polarization resistance of hybrid ZrTi coatings. Although the proliferation of human bone marrow mesenchymal stem cells was slower on these hydrophilic Ti and ZrTi coatings than both on uncoated Ti-6Al-4V and the reference tissue culture polystyrene dishes, both types of hybrid coating promoted greater osteogenic differentiation of these cells, indicated by approx. twice as high activity of alkaline phosphatase. The hybrid oxide layers newly developed in this study – especially the layers with Zr – are therefore promising for coating metallic bone implants.
Permanent Link: https://hdl.handle.net/11104/0333357