Reduced bacterial growth and increased osteoblast proliferation on titanium with a nanophase TiO2 surface treatment

Garima Bhardwaj, Thomas J Webster Department of Chemical Engineering, Northeastern University, Boston, MA, USA Background: The attachment and initial growth of bacteria on an implant surface dictates the progression of infection. Treatment often requires aggressive antibiotic use, which does not a...

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Autores principales:	Bhardwaj G, Webster TJ
Formato:	article
Lenguaje:	EN
Publicado:	Dove Medical Press 2017
Materias:	Nano-topography infection titanium dioxide electrophoretic deposition Medicine (General) R5-920
Acceso en línea:	https://doaj.org/article/e8193bc4ffb544c5bac249a45822b4c5
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spelling	oai:doaj.org-article:e8193bc4ffb544c5bac249a45822b4c52021-12-02T07:48:10ZReduced bacterial growth and increased osteoblast proliferation on titanium with a nanophase TiO2 surface treatment1178-2013https://doaj.org/article/e8193bc4ffb544c5bac249a45822b4c52017-01-01T00:00:00Zhttps://www.dovepress.com/reduced-bacterial-growth-and-increased-osteoblast-proliferation-on-tit-peer-reviewed-article-IJNhttps://doaj.org/toc/1178-2013Garima Bhardwaj, Thomas J Webster Department of Chemical Engineering, Northeastern University, Boston, MA, USA Background: The attachment and initial growth of bacteria on an implant surface dictates the progression of infection. Treatment often requires aggressive antibiotic use, which does not always work. To overcome the difficulties faced in systemic and local antibiotic delivery, scientists have forayed into using alternative techniques, which includes implant surface modifications that prevent initial bacterial adhesion, foreign body formation, and may offer a controlled inflammatory response.Objective: The current study focused on using electrophoretic deposition to treat titanium with a nanophase titanium dioxide surface texture to reduce bacterial adhesion and growth. Two distinct nanotopographies were analyzed, Ti-160, an antimicrobial surface designed to greatly reduce bacterial colonization, and Ti-120, an antimicrobial surface with a topography that upregulates osteoblast activity while reducing bacterial colonization; the number following Ti in the nomenclature represents the atomic force microscopy root-mean-square roughness value in nanometers.Results: There was a 95.6% reduction in Staphylococcus aureus (gram-positive bacteria) for the Ti-160-treated surfaces compared to the untreated titanium alloy controls. There was a 90.2% reduction in Pseudomonas aeruginosa (gram-negative bacteria) on Ti-160-treated surfaces compared to controls. For ampicillin-resistant Escherichia coli, there was an 81.1% reduction on the Ti-160-treated surfaces compared to controls. Similarly for surfaces treated with Ti-120, there was an 86.8% reduction in S. aureus, an 82.1% reduction in P. aeruginosa, and a 48.6% reduction in ampicillin-resistant E. coli. The Ti-120 also displayed a 120.7% increase at day 3 and a 168.7% increase at day 5 of osteoblast proliferation over standard titanium alloy control surfaces.Conclusion: Compared to untreated surfaces, Ti-160-treated titanium surfaces demonstrated a statistically significant 1 log reduction in S. aureus and P. aeruginosa, whereas Ti-120 provided an additional increase in osteoblast proliferation for up to 5 days, criteria, which should be further studied for a wide range of orthopedic applications. Keywords: nanotopography, infection, titanium dioxide, electrophoretic depositionBhardwaj GWebster TJDove Medical PressarticleNano-topographyinfectiontitanium dioxideelectrophoretic depositionMedicine (General)R5-920ENInternational Journal of Nanomedicine, Vol Volume 12, Pp 363-369 (2017)
institution	DOAJ
collection	DOAJ
language	EN
topic	Nano-topography infection titanium dioxide electrophoretic deposition Medicine (General) R5-920
spellingShingle	Nano-topography infection titanium dioxide electrophoretic deposition Medicine (General) R5-920 Bhardwaj G Webster TJ Reduced bacterial growth and increased osteoblast proliferation on titanium with a nanophase TiO2 surface treatment
description	Garima Bhardwaj, Thomas J Webster Department of Chemical Engineering, Northeastern University, Boston, MA, USA Background: The attachment and initial growth of bacteria on an implant surface dictates the progression of infection. Treatment often requires aggressive antibiotic use, which does not always work. To overcome the difficulties faced in systemic and local antibiotic delivery, scientists have forayed into using alternative techniques, which includes implant surface modifications that prevent initial bacterial adhesion, foreign body formation, and may offer a controlled inflammatory response.Objective: The current study focused on using electrophoretic deposition to treat titanium with a nanophase titanium dioxide surface texture to reduce bacterial adhesion and growth. Two distinct nanotopographies were analyzed, Ti-160, an antimicrobial surface designed to greatly reduce bacterial colonization, and Ti-120, an antimicrobial surface with a topography that upregulates osteoblast activity while reducing bacterial colonization; the number following Ti in the nomenclature represents the atomic force microscopy root-mean-square roughness value in nanometers.Results: There was a 95.6% reduction in Staphylococcus aureus (gram-positive bacteria) for the Ti-160-treated surfaces compared to the untreated titanium alloy controls. There was a 90.2% reduction in Pseudomonas aeruginosa (gram-negative bacteria) on Ti-160-treated surfaces compared to controls. For ampicillin-resistant Escherichia coli, there was an 81.1% reduction on the Ti-160-treated surfaces compared to controls. Similarly for surfaces treated with Ti-120, there was an 86.8% reduction in S. aureus, an 82.1% reduction in P. aeruginosa, and a 48.6% reduction in ampicillin-resistant E. coli. The Ti-120 also displayed a 120.7% increase at day 3 and a 168.7% increase at day 5 of osteoblast proliferation over standard titanium alloy control surfaces.Conclusion: Compared to untreated surfaces, Ti-160-treated titanium surfaces demonstrated a statistically significant 1 log reduction in S. aureus and P. aeruginosa, whereas Ti-120 provided an additional increase in osteoblast proliferation for up to 5 days, criteria, which should be further studied for a wide range of orthopedic applications. Keywords: nanotopography, infection, titanium dioxide, electrophoretic deposition
format	article
author	Bhardwaj G Webster TJ
author_facet	Bhardwaj G Webster TJ
author_sort	Bhardwaj G
title	Reduced bacterial growth and increased osteoblast proliferation on titanium with a nanophase TiO2 surface treatment
title_short	Reduced bacterial growth and increased osteoblast proliferation on titanium with a nanophase TiO2 surface treatment
title_full	Reduced bacterial growth and increased osteoblast proliferation on titanium with a nanophase TiO2 surface treatment
title_fullStr	Reduced bacterial growth and increased osteoblast proliferation on titanium with a nanophase TiO2 surface treatment
title_full_unstemmed	Reduced bacterial growth and increased osteoblast proliferation on titanium with a nanophase TiO2 surface treatment
title_sort	reduced bacterial growth and increased osteoblast proliferation on titanium with a nanophase tio2 surface treatment
publisher	Dove Medical Press
publishDate	2017
url	https://doaj.org/article/e8193bc4ffb544c5bac249a45822b4c5
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Reduced bacterial growth and increased osteoblast proliferation on titanium with a nanophase TiO2 surface treatment

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