Femtosecond Ti: Sa ultra short-pulse laser irradiation effects on the properties and morphology of the zirconia surface after ageing

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dc.contributor.authorKiyan, Vanessa Harumi
dc.contributor.authorRodrigues, Flávia Pires
dc.contributor.authorSamad, Ricardo Elgul
dc.contributor.authorZezell, Denise Maria
dc.contributor.authorBottino, Marco Antonio [UNESP]
dc.contributor.authorDe Lima, Nelson Batista
dc.contributor.authorCoury Saraceni, Cintia Helena
dc.contributor.institutionPaulista University - UNIP
dc.contributor.institutionFederal University of Ceará
dc.contributor.institutionIPEN/CNEN-SP
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.contributor.institutionCidade Universitária
dc.date.accessioned2021-06-25T11:05:10Z
dc.date.available2021-06-25T11:05:10Z
dc.date.issued2021-02-15
dc.description.abstractFemtosecond pulses from a Ti:Sapphire laser were used to irradiate specimens of yttria-stabilised (35% mol) tetragonal zirconia (Y-TZP) with the purpose of studying the effects of the irradiations on their surface properties and morphology after ageing. Zirconia disks were divided into eight groups (n = 32) according to their surface treatment and subsequent ageing: Control: no treatment; sandblasting: Al2O3 sandblasting 50 μm; and ultrashort laser pulses irradiation with 25 μJ pulses, considering two different scanning steps based on the width between two grooves. These groups were duplicated and submitted to ageing. The surfaces were analysed using scanning electron microscopy (SEM), and X-ray diffraction. A finite element analysis, a biaxial flexure test, as well as fractographic and Weibull analyses, were performed. The strengths of the disks were statistically different for the treatment factor, and the principal stresses seemed to be concentrated at the centre of the specimens, as predicted by the computer simulations. Ageing decreased the strengths for all groups and increased the Weibull modulus for the laser group with the 40 μm-width between two grooves. The sandblasting group presented the highest monoclinic phase peak. Although the most significant strength was found within the sandblasting group, the phase transformation was favourable to the laser groups. The Weibull modulus was higher for the laser group with the 60 μm-width between two grooves, confirming the highest homogeneity of its failure distribution. Regardless of the surface treatment, strength was decreased with ageing in all groups. The femtosecond Ti:Sa ultra-short pulse laser irradiation can be suggested as an alternative to the gold standard sandblasting in long-term Y-TZP zirconia rehabilitations, such as crowns and veneers.en
dc.description.affiliationPost-Graduate Programme in Dentistry Paulista University - UNIP, Rua Dr. Bacelar 1212, Vila Clementino
dc.description.affiliationPost-Graduate Programme in Dentistry Federal University of Ceará, Rua Monsenhor Furtado s/n, Rodolfo Teófilo
dc.description.affiliationCentro de Lasers e Aplicações IPEN/CNEN-SP, Av. Prof. Lineu Prestes 2242, Cidade Universitária
dc.description.affiliationInstitute of Science and Technology of São José Dos Campos (ICT-UNESP), Av. Eng. Francisco José Longo, 777, Jd. São Dimas
dc.description.affiliationCenter for Material Science and Technology-Nuclear and Energy Research Institute IPEN-SP Cidade Universitária, Av. Prof. Lineu Prestes 2242
dc.description.affiliationUnespInstitute of Science and Technology of São José Dos Campos (ICT-UNESP), Av. Eng. Francisco José Longo, 777, Jd. São Dimas
dc.format.extent4455-4465
dc.identifierhttp://dx.doi.org/10.1016/j.ceramint.2020.10.006
dc.identifier.citationCeramics International, v. 47, n. 4, p. 4455-4465, 2021.
dc.identifier.doi10.1016/j.ceramint.2020.10.006
dc.identifier.issn0272-8842
dc.identifier.scopus2-s2.0-85092216071
dc.identifier.urihttp://hdl.handle.net/11449/208027
dc.language.isoeng
dc.relation.ispartofCeramics International
dc.sourceScopus
dc.subjectBi-axial flexure strength
dc.subjectSurface treatment
dc.subjectUltrashort laser pulses ablation
dc.subjectY-TZP Zirconia
dc.titleFemtosecond Ti: Sa ultra short-pulse laser irradiation effects on the properties and morphology of the zirconia surface after ageingen
dc.typeArtigo

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