Stability of cp-Ti and Ti-6Al-4V alloy for dental implants as a function of saliva pH - an electrochemical study

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dc.contributor.authorBarao, Valentim Adelino Ricardo [UNESP]
dc.contributor.authorMathew, Mathew T.
dc.contributor.authorAssunção, Wirley Goncalves [UNESP]
dc.contributor.authorYuan, Judy Chia-Chun
dc.contributor.authorWimmer, Markus A.
dc.contributor.authorSukotjo, Cortino
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.contributor.institutionRush Univ
dc.contributor.institutionUniv Illinois
dc.date.accessioned2013-09-30T18:30:04Z
dc.date.accessioned2014-05-20T13:43:42Z
dc.date.available2013-09-30T18:30:04Z
dc.date.available2014-05-20T13:43:42Z
dc.date.issued2012-09-01
dc.description.abstractObjectives To investigate the role of different levels of pH of artificial saliva under simulated oral environment on the corrosion behavior of commercially pure titanium (cp-Ti) and Ti-6Al-4V alloy. Special attention is given to understand the changes in corrosion kinetics and surface characterization of Ti by using electrochemical impedance spectroscopy (EIS). Materials and methods Fifty-four Ti disks (15-mm diameter, 2-mm thickness) were divided into six groups (n similar to=similar to 9) as a function of saliva pH (3, 6.5, and 9) and Ti type. Samples were mechanically polished using standard metallographic procedures. Standard electrochemical tests, such as open circuit potential, EIS, and potentiodynamic tests were conducted in a controlled environment. Data were evaluated by two-way ANOVA, Tukey multiple comparison test, and independent t-test (a similar to=similar to 0.05). Ti surfaces were examined using white-light-interferometry microscopy and scanning electron microscopy (SEM). Results Saliva pH level significantly affected the corrosion behavior of both Ti types. At low pH, acceleration of ions exchange between Ti and saliva, and reduction of resistance of Ti surface against corrosion were observed (P similar to<similar to 0.05). Corrosion rate was also significantly increased in acidic medium (P similar to<similar to 0.05). Similar corrosion behavior was observed for both Ti types. The white-light-interferometry images of Ti surfaces show higher surface changes at low pH level. SEM images do not show detectable changes. No pitting corrosion was observed for any group. Conclusions The pH level of artificial saliva influences the corrosion behavior of cp-Ti and Ti-6Al-4V alloy in that lower pH accelerates the corrosion rate and kinetics. The corrosion products may mitigate the survival rate of dental implants.en
dc.description.affiliationUniv Estadual Paulista UNESP, Aracatuba Dent Sch, Dept Dent Mat & Prosthodont, Aracatuba, SP, Brazil
dc.description.affiliationRush Univ, Med Ctr, Dept Orthoped Surg, Chicago, IL 60612 USA
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, Aracatuba, SP, 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.extent1055-1062
dc.identifierhttp://dx.doi.org/10.1111/j.1600-0501.2011.02265.x
dc.identifier.citationClinical Oral Implants Research. Hoboken: Wiley-blackwell, v. 23, n. 9, p. 1055-1062, 2012.
dc.identifier.doi10.1111/j.1600-0501.2011.02265.x
dc.identifier.issn0905-7161
dc.identifier.lattes4438747643373395
dc.identifier.urihttp://hdl.handle.net/11449/15271
dc.identifier.wosWOS:000307725900007
dc.language.isoeng
dc.publisherWiley-Blackwell
dc.relation.ispartofClinical Oral Implants Research
dc.relation.ispartofjcr4.305
dc.relation.ispartofsjr2,462
dc.rights.accessRightsAcesso restrito
dc.sourceWeb of Science
dc.subjectartificial salivaen
dc.subjectcorrosionen
dc.subjectelectrochemistryen
dc.subjectpH levelen
dc.subjecttitaniumen
dc.titleStability of cp-Ti and Ti-6Al-4V alloy for dental implants as a function of saliva pH - an electrochemical studyen
dc.typeArtigo
dcterms.licensehttp://olabout.wiley.com/WileyCDA/Section/id-406071.html
dcterms.rightsHolderWiley-blackwell
unesp.author.lattes4438747643373395
unesp.author.orcid0000-0002-6391-9917[1]
unesp.author.orcid0000-0002-8903-0737[3]
unesp.author.orcid0000-0003-3604-7938[2]
unesp.campusUniversidade Estadual Paulista (Unesp), Faculdade de Odontologia, Araçatubapt

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