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Improving the fretting biocorrosion of Ti6Al4V alloy bone screw by decorating structure optimised TiO2 nanotubes layer

Luo, J; Tamaddon, M; Yan, C; Ma, S; Wang, X; Zhou, F; Liu, C; (2020) Improving the fretting biocorrosion of Ti6Al4V alloy bone screw by decorating structure optimised TiO2 nanotubes layer. Journal of Materials Science & Technology , 49 pp. 47-55. 10.1016/j.jmst.2020.02.027. Green open access

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Abstract

TiO2 nanotubes (NT) has been demonstrated its potential in orthopaedic applications due to its enhanced surface wettability and bio-osteointegration. However, the fretting biocorrosion is the main concern that limited its successfully application in orthopaedic application. In this study, a structure optimised thin TiO2 nanotube (SONT) layer was successfully created on Ti6Al4V bone screw, and its fretting corrosion performance was investigated and compared to the pristine Ti6Al4V bone screws and NT decorated screw in a bone-screw fretting simulation rig. The results have shown that the debonding TiO2 nanotube from the bone screw reduced significantly, as a result of structure optimisation. The SONT layer also exhibited enhanced bio-corrosion resistance compared pristine bone screw and conventionally NT modified bone screw. It is postulated that interfacial layer between TiO2 nanotube and Ti6Al4V substrate, generated during structure optimisation process, enhanced bonding of TiO2 nanotube layer to the Ti6Al4V bone screws that leading to the improvement in fretting corrosion resistance. The results highlighted the potential SONT in orthopaedic application as bone fracture fixation devices.

Type: Article
Title: Improving the fretting biocorrosion of Ti6Al4V alloy bone screw by decorating structure optimised TiO2 nanotubes layer
Open access status: An open access version is available from UCL Discovery
DOI: 10.1016/j.jmst.2020.02.027
Publisher version: http://dx.doi.org/10.1016/j.jmst.2020.02.027
Language: English
Additional information: This version is the author accepted manuscript. For information on re-use, please refer to the publisher’s terms and conditions.
Keywords: Bone implant interface, Bone screws, Biomedical materials, TiO2 nanotubes, Fretting corrosion
UCL classification: UCL
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences > Faculty of Medical Sciences
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences > Faculty of Medical Sciences > Div of Surgery and Interventional Sci
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences > Faculty of Medical Sciences > Div of Surgery and Interventional Sci > Department of Ortho and MSK Science
URI: https://discovery.ucl.ac.uk/id/eprint/10092624
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