Effect of Porcelain-to-Zirconia Ratio and Bonding Strategy on the Biaxial Flexural Strength and Weibull Characteristics of a Stress-Free Bilayer CAD/CAM Ceramic System

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dc.contributor.authorSato, Tabata Prado [UNESP]
dc.contributor.authorArata, Anelyse
dc.contributor.authorde Miranda, Larissa Mendonça
dc.contributor.authorBottino, Marco Antonio [UNESP]
dc.contributor.authorde Melo, Renata Marques [UNESP]
dc.contributor.authorZhang, Yu
dc.contributor.authorSouza, Rodrigo Othávio Assunção
dc.contributor.institutionUniversidade Estadual Paulista (UNESP)
dc.contributor.institutionFederal University of ABC
dc.contributor.institutionDivision of Prosthodontics
dc.contributor.institutionSchool of Dental Medicine
dc.contributor.institutionFederal University of Rio Grande do Norte
dc.date.accessioned2023-07-29T14:03:57Z
dc.date.available2023-07-29T14:03:57Z
dc.date.issued2022-01-01
dc.description.abstractPurpose: To evaluate the biaxial flexural strength of different porcelain-to-zirconia thickness ratios and bonding strategies of a stress-free bilayer CAD/CAM ceramic system. Materials and Methods: A total of 60 zirconia discs (diameter: 15 mm; thickness: 0.3 or 0.5 mm; n = 30 for each thickness) were divided into six groups (n = 10 each) according to porcelain-to-zirconia ratio and bonding strategy: VM/Zr (control): zirconia discs veneered with a feldspathic ceramic (VM 9, Vita) in 0.9-mm and 0.7-mm thicknesses using a conventional hand-layering technique; VB/Zr-SBU: zirconia discs airborne particle–abraded with 50-μm Al2O3 particles followed by an MDP primer application (Single Bond Universal, 3M) and bonded to the porcelain with a resin cement (Panavia F 2.0, Kuraray); and VB/Zr-RC: zirconia discs airborne particle– abraded with 30-μm silica-coated Al2O3 particles and silanized and bonded to the porcelain with the same resin cement. Before cementation, the VB (Vitablocs II) discs were etched with 5% hydrofluoric acid (60 seconds), followed by silane application. The bilayers (thickness = 1.2 mm) were loaded with 750 g while light curing the resin cement. Two porcelain-to-zirconia thickness ratios were evaluated: 0.9: 0.3 mm and 0.7: 0.5 mm. All groups were subjected to 106 mechanical cycles, followed by a biaxial flexural test. Data (MPa) were subjected to two-way analysis of variance (ANOVA), Tukey test (5%), and Weibull analyses. Results: Two-way ANOVA revealed that the factor porcelain-to-zirconia ratio (P =.0556) was not significant; however, the bonding strategy factor was statistically significant. Among the 0.5-mm zirconia groups, the VB/Zr-SBU group presented higher flexural strength (s) than the VM/Zr or VB/Zr-RC groups. Similar results were also found for the 0.3-mm zirconia groups, in which the VB/Zr-SBU group also presented higher strength than the others, which were similar in comparison (Tukey). The Weibull modulus was similar among the groups; however, the characteristic strength was significantly different (P =.000). Conclusion: The zirconia bonding strategy with 50-μm Al2O3 airborne-particle abrasion, followed by a primer application, increases the flexural strength of a stress-free bilayer CAD/CAM ceramic systemen
dc.description.affiliationInstitute of Science and Technology Universidade Estadual Paulista São José dos Campos
dc.description.affiliationNanoscience and Advanced Materials Program Federal University of ABC, Bangú
dc.description.affiliationFederal University of Rio Grande do Norte Department of Dentistry Division of Prosthodontics
dc.description.affiliationDepartment of Dental Materials Institute of Science and Technology University Estadual Paulista São José dos Campos
dc.description.affiliationUniversity of Pennsylvania School of Dental Medicine Department of Preventive and Restorative Sciences
dc.description.affiliationDepartment of Dentistry Federal University of Rio Grande do Norte, Rio Grande do Norte
dc.description.affiliationUnespInstitute of Science and Technology Universidade Estadual Paulista São José dos Campos
dc.description.affiliationUnespDepartment of Dental Materials Institute of Science and Technology University Estadual Paulista São José dos Campos
dc.description.sponsorshipFundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
dc.description.sponsorshipIdFAPESP: 2012/02945-0
dc.format.extent469-479
dc.identifierhttp://dx.doi.org/10.11607/ijp.7551
dc.identifier.citationInternational Journal of Prosthodontics, v. 35, n. 4, p. 469-479, 2022.
dc.identifier.doi10.11607/ijp.7551
dc.identifier.issn1942-4426
dc.identifier.issn0893-2174
dc.identifier.scopus2-s2.0-85138161724
dc.identifier.urihttp://hdl.handle.net/11449/249158
dc.language.isoeng
dc.relation.ispartofInternational Journal of Prosthodontics
dc.sourceScopus
dc.titleEffect of Porcelain-to-Zirconia Ratio and Bonding Strategy on the Biaxial Flexural Strength and Weibull Characteristics of a Stress-Free Bilayer CAD/CAM Ceramic Systemen
dc.typeArtigo

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