Improved tribocorrosion performance of bio-functionalized TiO2 nanotubes under two-cycle sliding actions in artificial saliva

dc.contributor.authorAlves, Sofia A. [UNESP]
dc.contributor.authorRossi, André L.
dc.contributor.authorRibeiro, Ana R. [UNESP]
dc.contributor.authorToptan, Fatih
dc.contributor.authorPinto, Ana M.
dc.contributor.authorShokuhfar, Tolou
dc.contributor.authorCelis, Jean-Pierre
dc.contributor.authorRocha, Luís A. [UNESP]
dc.contributor.institutionUniversity of Minho
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.contributor.institutionBrazilian Center for Research in Physics
dc.contributor.institutionQuality and Technology
dc.contributor.institutionUniversity of Grande Rio
dc.contributor.institutionUniversity of Illinois at Chicago
dc.contributor.institutionKU Leuven
dc.contributor.institutionFalex Tribology N.V
dc.date.accessioned2018-12-11T17:17:45Z
dc.date.available2018-12-11T17:17:45Z
dc.date.issued2018-04-01
dc.description.abstractAfter insertion into bone, dental implants may be subjected to tribocorrosive conditions resulting in the release of metallic ions and solid wear debris, which can induce to peri-implant inflammatory reactions accompanied by bone loss, and ultimately implant loosening. Despite the promising ability of TiO2 nanotubes (NTs) to improve osseointegration and avoid infection-related failures, the understanding of their degradation under the simultaneous action of wear and corrosion (tribocorrosion) is still very limited. This study aims, for the first time, to study the tribocorrosion behavior of bio-functionalized TiO2 NTs submitted to two-cycle sliding actions, and compare it with conventional TiO2 NTs. TiO2 NTs grown by anodization were doped with bioactive elements, namely calcium (Ca), phosphorous (P), and zinc (Zn), through reverse polarization anodization treatments. Characterization techniques such as scanning electron microscopy (SEM), energy dispersive X-ray spectroscopy (EDS) and scanning transmission electron microscopy (STEM), were used to characterize the films. Tribocorrosion tests were carried out in artificial saliva (AS) by applying two cycles of reciprocating sliding actions. The open circuit potential (OCP) was monitored before, during, and after both cycles of sliding, during which the coefficient of friction (COF) was calculated. The resulting wear scars were analyzed by SEM and EDS, and wear volume measurements were performed by 2D profilometry. Finally, the mechanical features of TiO2 NTs were accessed by nanoindentation. The results show that bio-functionalized TiO2 NTs display an enhanced tribocorrosion performance, ascribed to the growth of a nano-thick oxide film at Ti/TiO2 NTs interface, which significantly increased their adhesion strength to the substrate and consequently their hardness. Furthermore, it was discovered that during tribo-electrochemical solicitations, the formation of a P-rich tribofilm takes place, which grants both electrochemical protection and resistance to mechanical wear. This study provides fundamental and new insights for the development of multifunctional TiO2 NTs with long-term biomechanical stability and improved clinical outcomes.en
dc.description.affiliationCMEMS – Center of MicroElectroMechanical Systems Department of Mechanical Engineering University of Minho
dc.description.affiliationIBTN/BR Brazilian Branch of the Institute of Biomaterials Tribocorrosion and Nanomedicine Faculty of Sciences UNESP – Universidade Estadual Paulista
dc.description.affiliationBrazilian Center for Research in Physics
dc.description.affiliationDirectory of Life Sciences Applied Metrology National Institute of Metrology Quality and Technology
dc.description.affiliationPostgraduate Program in Translational Biomedicine University of Grande Rio
dc.description.affiliationDepartment of Mechanical Engineering University of Minho
dc.description.affiliationDepartment of Bioengineering University of Illinois at Chicago
dc.description.affiliationIBTN/US American Branch of the Institute of Biomaterials Tribocorrosion and Nanomedicine University of Illinois at Chicago
dc.description.affiliationDepartment of Materials Engineering KU Leuven
dc.description.affiliationFalex Tribology N.V, Wingepark 23B
dc.description.affiliationFaculdade de Ciências Departamento de Física UNESP – Universidade Estadual Paulista
dc.description.affiliationUnespIBTN/BR Brazilian Branch of the Institute of Biomaterials Tribocorrosion and Nanomedicine Faculty of Sciences UNESP – Universidade Estadual Paulista
dc.description.affiliationUnespFaculdade de Ciências Departamento de Física UNESP – Universidade Estadual Paulista
dc.description.sponsorshipNational Science Foundation
dc.description.sponsorshipConselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
dc.description.sponsorshipCoordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)
dc.description.sponsorshipFederación Española de Enfermedades Raras
dc.description.sponsorshipFundació Catalana de Trasplantament
dc.description.sponsorshipIdNational Science Foundation: 1564950
dc.description.sponsorshipIdCNPq: 490761/2013-5
dc.description.sponsorshipIdCAPES: 99999.008666/2014-08
dc.description.sponsorshipIdFederación Española de Enfermedades Raras: POCI-01–0145-FEDER-006941
dc.description.sponsorshipIdFundació Catalana de Trasplantament: SFRH/BD/88517/2012
dc.description.sponsorshipIdFundació Catalana de Trasplantament: UID/EEA/04436/2013
dc.format.extent143-154
dc.identifierhttp://dx.doi.org/10.1016/j.jmbbm.2018.01.038
dc.identifier.citationJournal of the Mechanical Behavior of Biomedical Materials, v. 80, p. 143-154.
dc.identifier.doi10.1016/j.jmbbm.2018.01.038
dc.identifier.file2-s2.0-85041484458.pdf
dc.identifier.issn1878-0180
dc.identifier.issn1751-6161
dc.identifier.scopus2-s2.0-85041484458
dc.identifier.urihttp://hdl.handle.net/11449/175828
dc.language.isoeng
dc.relation.ispartofJournal of the Mechanical Behavior of Biomedical Materials
dc.relation.ispartofsjr0,958
dc.rights.accessRightsAcesso aberto
dc.sourceScopus
dc.subjectBio-functionalization
dc.subjectMechanical properties
dc.subjectTiO2 nanotubes
dc.subjectTribocorrosion
dc.subjectTwo-cycle-sliding
dc.titleImproved tribocorrosion performance of bio-functionalized TiO2 nanotubes under two-cycle sliding actions in artificial salivaen
dc.typeArtigo
unesp.author.lattes5604829226181486[2]
unesp.author.orcid0000-0001-6388-7479[2]

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