TY - JOUR
T1 - Morphology and antimicrobial properties of hydroxyapatite–titanium oxide layers on the surface of Ti–6Al–4V alloy
AU - Lugovskoy, S.
AU - Weiss, D.
AU - Tsadok, U.
AU - Lugovskoy, A.
N1 - Publisher Copyright:
© 2015 Elsevier B.V.
PY - 2016/9/1
Y1 - 2016/9/1
N2 - The surface of Ti–6Al–4V alloy was modified by Plasma Electrolytic Oxidation and hydrothermal processing. The morphology, specific surface area and anti-bacterial activities of the surfaces produced for different modes of the treatment were compared to those of pristine Ti–6Al–4V. It was found that 20 min of PEO followed by 4 h of hydrothermal processing at pH = 11 produced a maximum amount of hydroxyapatite in the surface layer. The specific surface area of the alloys increases very moderately after PEO and dramatically after hydrothermal processing, especially at pH = 11. The development of Staphylococcus epidermidis is suppressed by the titanium dioxide formed by PEO. In contrast, hydroxyapatite formed by hydrothermal treatment at pH = 7 favors the growth of the bacteria. If hydrothermal processing was performed at pH = 11, hydroxyapatite negligibly affects the growth of S. epidermidis, as compared to the pristine alloy.
AB - The surface of Ti–6Al–4V alloy was modified by Plasma Electrolytic Oxidation and hydrothermal processing. The morphology, specific surface area and anti-bacterial activities of the surfaces produced for different modes of the treatment were compared to those of pristine Ti–6Al–4V. It was found that 20 min of PEO followed by 4 h of hydrothermal processing at pH = 11 produced a maximum amount of hydroxyapatite in the surface layer. The specific surface area of the alloys increases very moderately after PEO and dramatically after hydrothermal processing, especially at pH = 11. The development of Staphylococcus epidermidis is suppressed by the titanium dioxide formed by PEO. In contrast, hydroxyapatite formed by hydrothermal treatment at pH = 7 favors the growth of the bacteria. If hydrothermal processing was performed at pH = 11, hydroxyapatite negligibly affects the growth of S. epidermidis, as compared to the pristine alloy.
KW - Antibacterial activity
KW - Biomaterials
KW - Hydroxyapatite
KW - Oxide layers
KW - Plasma Electrolytic Oxidation
KW - Titanium implants
UR - http://www.scopus.com/inward/record.url?scp=84949238900&partnerID=8YFLogxK
U2 - 10.1016/j.surfcoat.2015.11.050
DO - 10.1016/j.surfcoat.2015.11.050
M3 - ???researchoutput.researchoutputtypes.contributiontojournal.article???
AN - SCOPUS:84949238900
SN - 0257-8972
VL - 301
SP - 80
EP - 84
JO - Surface and Coatings Technology
JF - Surface and Coatings Technology
ER -