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dc.contributor.authorBesinis, Alexander
dc.contributor.authorHadi, Sanna Dara
dc.contributor.authorLe, Huirong
dc.contributor.authorTredwin, Christopher
dc.contributor.authorHandy, Richard
dc.date.accessioned2017-09-08T11:47:17Z
dc.date.available2017-09-08T11:47:17Z
dc.date.issued2017-03-17
dc.identifier.citationBesinis, A. et al (2017) 'Antibacterial activity and biofilm inhibition by surface modified titanium alloy medical implants following application of silver, titanium dioxide and hydroxyapatite nanocoatings', Nanotoxicology, 11 (3):327en
dc.identifier.issn17435390
dc.identifier.doi10.1080/17435390.2017.1299890
dc.identifier.urihttp://hdl.handle.net/10545/621844
dc.description.abstractOne of the most common causes of implant failure is peri-implantitis, which is caused by bacterial biofilm formation on the surfaces of dental implants. Modification of the surface nanotopography has been suggested to affect bacterial adherence to implants. Silver nanoparticles are also known for their antibacterial properties. In this study, titanium alloy implants were surface modified following silver plating, anodisation and sintering techniques to create a combination of silver, titanium dioxide and hydroxyapatite (HA) nanocoatings. Their antibacterial performance was quantitatively assessed by measuring the growth of Streptococcus sanguinis, proportion of live/dead cells and lactate production by the microbes over 24 h. Application of a dual layered silver–HA nanocoating to the surface of implants successfully inhibited bacterial growth in the surrounding media (100% mortality), whereas the formation of bacterial biofilm on the implant surfaces was reduced by 97.5%. Uncoated controls and titanium dioxide nanocoatings showed no antibacterial effect. Both silver and HA nanocoatings were found to be very stable in biological fluids with material loss, as a result of dissolution, to be less than 0.07% for the silver nanocoatings after 24 h in a modified Krebs-Ringer bicarbonate buffer. No dissolution was detected for the HA nanocoatings. Thus, application of a dual layered silver–HA nanocoating to titanium alloy implants creates a surface with antibiofilm properties without compromising the HA biocompatibility required for successful osseointegration and accelerated bone healing.
dc.description.sponsorshipN/Aen
dc.language.isoenen
dc.publisherTaylor and Francisen
dc.relation.urlhttps://www.tandfonline.com/doi/full/10.1080/17435390.2017.1299890en
dc.rightsArchived with thanks to Nanotoxicologyen
dc.subjectSurface coatingen
dc.subjectAntibacterial activityen
dc.subjectBiomaterialen
dc.subjectNanotopographyen
dc.subjectNanoparticleen
dc.subjectMedical microbiologyen
dc.subjectNanosurfacesen
dc.titleAntibacterial activity and biofilm inhibition by surface modified titanium alloy medical implants following application of silver, titanium dioxide and hydroxyapatite nanocoatingsen
dc.typeArticleen
dc.identifier.eissn17435404
dc.contributor.departmentPlymouth Universityen
dc.identifier.journalNanotoxicologyen
refterms.dateFOA2019-02-28T16:05:18Z
html.description.abstractOne of the most common causes of implant failure is peri-implantitis, which is caused by bacterial biofilm formation on the surfaces of dental implants. Modification of the surface nanotopography has been suggested to affect bacterial adherence to implants. Silver nanoparticles are also known for their antibacterial properties. In this study, titanium alloy implants were surface modified following silver plating, anodisation and sintering techniques to create a combination of silver, titanium dioxide and hydroxyapatite (HA) nanocoatings. Their antibacterial performance was quantitatively assessed by measuring the growth of Streptococcus sanguinis, proportion of live/dead cells and lactate production by the microbes over 24 h. Application of a dual layered silver–HA nanocoating to the surface of implants successfully inhibited bacterial growth in the surrounding media (100% mortality), whereas the formation of bacterial biofilm on the implant surfaces was reduced by 97.5%. Uncoated controls and titanium dioxide nanocoatings showed no antibacterial effect. Both silver and HA nanocoatings were found to be very stable in biological fluids with material loss, as a result of dissolution, to be less than 0.07% for the silver nanocoatings after 24 h in a modified Krebs-Ringer bicarbonate buffer. No dissolution was detected for the HA nanocoatings. Thus, application of a dual layered silver–HA nanocoating to titanium alloy implants creates a surface with antibiofilm properties without compromising the HA biocompatibility required for successful osseointegration and accelerated bone healing.


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