Effect of electrochemical structuring of Ti6Al4V on osteoblast behaviourin vitro
| Autor: | Siti Hawa Ngalim, Mark A. Birch, Yang Ty, Lu Wj, SE Johnson-Lynn, Qibai Wu, Sudipta Roy, S. Nouraei, Watchorn C, Andrew McCaskie |
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| Rok vydání: | 2012 |
| Předmět: |
Titanium
Osteoblasts Nanostructure Materials science Cell Survival Surface Properties Biomedical Engineering Polishing Biocompatible Materials Bioengineering Nanotechnology Electroplating Rats Biomaterials Electropolishing Chemical engineering Materials Testing Alloys Surface roughness Animals Surface layer Cells Cultured Surface finishing Microscale chemistry Electrochemical potential |
| Zdroj: | Biomedical Materials. 7:035016 |
| ISSN: | 1748-605X 1748-6041 |
| DOI: | 10.1088/1748-6041/7/3/035016 |
| Popis: | Topography and surface chemistry have a profound effect on the way in which cells interact with an implant, which in turn impacts on clinical use and performance. In this paper we examine an electrochemical polishing approach in H2SO4/methanol that can be applied to the widely used orthopaedic/dentistry implant material, Ti6Al4V, to produce structured surfaces. The surface roughness, as characterized by R(a), was found to be dependent on the time of electropolishing but not on the voltage parameters used here. The surface chemistry, however, was dependent on the applied electrochemical potential. It was found that the chemical composition of the surface layer was modified during the electrochemical process, and at high potentials (9.0 V) a pure TiO2 layer of at least 10 nm was created on top of the bulk alloy. Characterization of these surfaces with rat cells from the osteoblast lineage provided further evidence of contact guidance by microscale topography with morphology analysis correlating with surface roughness (R(a) 300–550 nm). Formation of a bone-like matrix after long-term culture on these surfaces was not strongly dependent upon R(a) values but followed the voltage parameter. These findings suggest that the surfaces created by treatment at higher voltages (9.0 V) produced a nanoscale layer of pure TiO2 on the Ti6Al4V surface that influenced the programme of cellular differentiation culminating in osteogenesis. |
| Databáze: | OpenAIRE |
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