What is the role of lipopolysaccharide on the tribocorrosive behavior of titanium?

Página do item simplificado
dc.contributor.authorMathew, Mathew T.
dc.contributor.authorBarao, Valentim Adelino Ricardo [UNESP]
dc.contributor.authorYuan, Judy Chia-Chun
dc.contributor.authorAssunção, Wirley Goncalves [UNESP]
dc.contributor.authorSukotjo, Cortino
dc.contributor.authorWimmer, Markus A.
dc.contributor.institutionRush Univ
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.contributor.institutionUniv Illinois
dc.date.accessioned2013-09-30T18:30:08Z
dc.date.accessioned2014-05-20T13:43:44Z
dc.date.available2013-09-30T18:30:08Z
dc.date.available2014-05-20T13:43:44Z
dc.date.issued2012-04-01
dc.description.abstractIn an oral environment, titanium dental implants are exposed to a complex degradation process which is predominantly influenced by the intermittent mechanical events (mastication), continuous exposure to varying chemical solutions (saliva and food) and formation of microbiological (biofilm). Several studies have investigated the chemical corrosion and mechanical resistance of titanium; however, very few attempted to report on the effects of combined chemical, mechanical and microbiological interactions, which simulates the oral environment. A new multi-disciplinary research area, tribocorrosion (a combined study of wear and corrosion), was used to address such issues. The tribocorrosive nature of titanium in artificial saliva (pH 6.5) with lipopolysaccharide (LPS) was investigated. Rventy-four titanium discs (12 mm diameter, 7 mm thickness), were divided into 8 groups (n = 3) as a function of material (commercially pure titanium (cpTi) and titanium-aluminum-vanadium (TiAlV) alloy) and LPS concentrations (0, 0.15, 15 and 150 mu g/ml). Sliding duration (2000 cycles), frequency (1.2 Hz) and load (20 N) parameters mimicked the daily mastication process. Electrochemical impedance spectroscopy was conducted before and after tribocorrosion to comprehend the changes in corrosion kinetics. Worn surfaces were examined using white-light-interferometry and scanning electron microscopy. Total weight loss and roughness values were calculated. LPS affected the tribocorrosive behavior of both titanium types. LPS statistically accelerated the ion exchange between titanium and saliva, and reduced the resistance of the titanium surface against corrosion (p < .05). Sliding events decreased the protectiveness of the titanium surface. In general, TiAlV exhibited better corrosion behavior, but both titanium types showed similar in total weight loss (p > .05). LPS significantly increased the cpTi weight loss (p = .041), and the roughness of the surface (p < .001). In summary, LPS negatively affected the corrosion/wear behavior of titanium, which may contribute to the failure of dental implants. (C) 2011 Elsevier Ltd. All rights reserved.en
dc.description.affiliationRush Univ, Med Ctr, Sect Tribol, Dept Orthoped Surg, Chicago, IL 60612 USA
dc.description.affiliationUniv Estadual Paulista UNESP, Aracatuba Dent Sch, Dept Dent Mat & Prosthodont, BR-16015050 São Paulo, Brazil
dc.description.affiliationUniv Illinois, Coll Dent, Dept Restorat Dent, Chicago, IL 60612 USA
dc.description.affiliationUnespUniv Estadual Paulista UNESP, Aracatuba Dent Sch, Dept Dent Mat & Prosthodont, BR-16015050 São Paulo, Brazil
dc.description.sponsorshipCoordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)
dc.description.sponsorshipFundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
dc.description.sponsorshipIdCAPES: 4129/09-1
dc.description.sponsorshipIdFAPESP: 07/58926-5
dc.format.extent71-85
dc.identifierhttp://dx.doi.org/10.1016/j.jmbbm.2011.11.004
dc.identifier.citationJournal of The Mechanical Behavior of Biomedical Materials. Amsterdam: Elsevier B.V., v. 8, p. 71-85, 2012.
dc.identifier.doi10.1016/j.jmbbm.2011.11.004
dc.identifier.issn1751-6161
dc.identifier.lattes4438747643373395
dc.identifier.urihttp://hdl.handle.net/11449/15287
dc.identifier.wosWOS:000302586300007
dc.language.isoeng
dc.publisherElsevier B.V.
dc.relation.ispartofJournal of the Mechanical Behavior of Biomedical Materials
dc.relation.ispartofjcr3.239
dc.relation.ispartofsjr0,958
dc.rights.accessRightsAcesso restrito
dc.sourceWeb of Science
dc.subjectTitaniumen
dc.subjectLipopolysaccharideen
dc.subjectElectrochemistryen
dc.subjectTribocorrosionen
dc.subjectSynergismen
dc.titleWhat is the role of lipopolysaccharide on the tribocorrosive behavior of titanium?en
dc.typeArtigo
dcterms.licensehttp://www.elsevier.com/about/open-access/open-access-policies/article-posting-policy
dcterms.rightsHolderElsevier B.V.
unesp.author.lattes4438747643373395
unesp.author.orcid0000-0002-6391-9917[2]
unesp.author.orcid0000-0002-8903-0737[4]
unesp.author.orcid0000-0003-3604-7938[1]
unesp.campusUniversidade Estadual Paulista (Unesp), Faculdade de Odontologia, Araçatubapt

Arquivos

Licença do Pacote
Agora exibindo 1 - 2 de 2
Nenhuma Miniatura disponível
Nome:
license.txt
Tamanho:
1.71 KB
Formato:
Item-specific license agreed upon to submission
Descrição:
Nenhuma Miniatura disponível
Nome:
license.txt
Tamanho:
1.71 KB
Formato:
Item-specific license agreed upon to submission
Descrição:

Coleções

Artigos - Materiais Odontológicos e Prótese - FOA