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dc.contributor.authorMarques, Isabella da Silva Vieira
dc.contributor.authorAlfaro, Maria Fernanda
dc.contributor.authorCruz, Nilson Cristino da [UNESP]
dc.contributor.authorMesquita, Marcelo Ferraz
dc.contributor.authorSukotjo, Cortino
dc.contributor.authorMathew, Mathew T.
dc.contributor.authorBarão, Valentim Adelino Ricardo
dc.identifier.citationJournal of the Mechanical Behavior of Biomedical Materials, v. 60, p. 8-21.
dc.description.abstractDental implants, inserted into the oral cavity, are subjected to a synergistic interaction of wear and corrosion (tribocorrosion), which may lead to implant failures. The objective of this study was to investigate the tribocorrosion behavior of Ti oxide films produced by micro-arc oxidation (MAO) under oral environment simulation. MAO was conducted under different conditions as electrolyte composition: Ca/P (0.3 M/0.02 M or 0.1 M/0.03 M) incorporated with/without Ag (0.62 g/L) or Si (0.04 M); and treatment duration (5 and 10 min). Non-coated and sandblasted samples were used as controls. The surfaces morphology, topography and chemical composition were assessed to understand surface properties. ANOVA and Tukey's HSD tests were used (α=0.05). Biofunctional porous oxide layers were obtained. Higher Ca/P produced larger porous and harder coatings when compared to non-coated group (p<0.001), due to the presence of rutile crystalline structure. The total mass loss (Kwc), which includes mass loss due to wear (Kw) and that due to corrosion (Kc) were determined. The dominant wear regime was found for higher Ca/P groups (Kc/Kw≈0.05) and a mechanism of wear-corrosion for controls and lower Ca/P groups (Kc/Kw≈0.11). The group treated for 10 min and enriched with Ag presented the lowest Kwc (p<0.05). Overall, MAO process was able to produce biofunctional oxide films with improved surface features, working as tribocorrosion resistant surfaces.en
dc.relation.ispartofJournal of the Mechanical Behavior of Biomedical Materials
dc.subjectBioactive coatings
dc.subjectDental implants
dc.titleTribocorrosion behavior of biofunctional titanium oxide films produced by micro-arc oxidation: Synergism and mechanismsen
dc.contributor.institutionUniversidade Estadual de Campinas (UNICAMP)
dc.contributor.institutionTribocorrosion and Nanomedicine
dc.contributor.institutionBrazilian Branch
dc.contributor.institutionUniversidade Estadual Paulista (UNESP)
dc.contributor.institutionCollege of Dentistry
dc.contributor.institutionRush University Medical Center
dc.description.affiliationDepartment of Prosthodontics and Periodontology Piracicaba Dental School University of Campinas (UNICAMP), Av Limeira, 901
dc.description.affiliationIBTN - Institute of Biomaterials Tribocorrosion and Nanomedicine
dc.description.affiliationIBTN/Br - Institute of Biomaterials Tribocorrosion and Nanomedicine Brazilian Branch
dc.description.affiliationLaboratory of Technological Plasmas Engineering College Univ Estadual Paulista (UNESP), Av Três de Março, 511
dc.description.affiliationDepartment of Restorative Dentistry University of Illinois at Chicago College of Dentistry, 801 S Paulina
dc.description.affiliationDepartment of Orthopedic Surgery Rush University Medical Center, 1611 W Harrison
dc.description.affiliationUnespLaboratory of Technological Plasmas Engineering College Univ Estadual Paulista (UNESP), Av Três de Março, 511
dc.rights.accessRightsAcesso aberto
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