Reliability and lifetime of lithium disilicate, 3Y-TZP, and 5Y-TZP zirconia crowns with different occlusal thicknesses

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dc.contributor.authorAdabo, Gelson Luis [UNESP]
dc.contributor.authorLonghini, Diogo [UNESP]
dc.contributor.authorBaldochi, Mariana Ribeiro [UNESP]
dc.contributor.authorBergamo, Edmara Tatiely Pedroso
dc.contributor.authorBonfante, Estevam Augusto
dc.contributor.institutionUniversidade Estadual Paulista (UNESP)
dc.contributor.institutionUniversidade de São Paulo (USP)
dc.date.accessioned2023-07-29T16:10:40Z
dc.date.available2023-07-29T16:10:40Z
dc.date.issued2023-01-01
dc.description.abstractObjectives: To assess the probability of survival of crowns made with a 3Y-TZP, a 5Y-TZP, and a lithium disilicate. Materials and methods: CAD-CAM premolar crowns with occlusal thicknesses of 1.0 mm or 1.5 mm and cemented on a metal dye. Step-stress accelerated life testing (SSALT) was performed to access the use level probability Weibull curves and reliability were calculated for the completion of a mission of 100,000 cycles at 300 to 1200 N. Results: All ceramics showed a high probability of survival (87–99%) at 300 N, irrespective of thickness. 3Y-TZP shows no significant decrease in the probability of survival up to 1200 N (83–96%). Lithium disilicate presented lower reliability than zirconia under the 600 N mission. 5Y-TZP showed lower reliability than 3Y-TZP at 1200 N. There was no significant difference in the Weibull modulus (3.23–7.12). 3Y-TZP had the highest characteristic strength (2483–2972 N), followed by 5Y-TZP (1512–1547 N) and lithium disilicate (971–1154 N). Conclusion: Zirconia ceramics have a high probability of survival (up to 900 N-load), while lithium disilicate survives up to 300 N load only, irrespective of the thickness (1.0 mm or 1.5 mm). Clinical relevance: The probability of survival of posterior crowns made with zirconia ceramics resists extreme loads while glass ceramics resist normal chewing loads. In addition, crowns with thinner occlusal face showed sufficient mechanical behavior.en
dc.description.affiliationSchool of Dentistry Sao Paulo State University (Unesp)
dc.description.affiliationSchool of Dentistry University of Sao Paulo (USP)
dc.description.affiliationUnespSchool of Dentistry Sao Paulo State University (Unesp)
dc.identifierhttp://dx.doi.org/10.1007/s00784-023-05001-6
dc.identifier.citationClinical Oral Investigations.
dc.identifier.doi10.1007/s00784-023-05001-6
dc.identifier.issn1436-3771
dc.identifier.issn1432-6981
dc.identifier.scopus2-s2.0-85152043416
dc.identifier.urihttp://hdl.handle.net/11449/249841
dc.language.isoeng
dc.relation.ispartofClinical Oral Investigations
dc.sourceScopus
dc.subjectBiaxial flexural strength
dc.subjectCeramics
dc.subjectFully stabilized zirconia
dc.subjectLithium disilicate
dc.subjectMaterial resistance
dc.subjectMonolithic zirconia
dc.subjectPartially stabilized zirconia
dc.titleReliability and lifetime of lithium disilicate, 3Y-TZP, and 5Y-TZP zirconia crowns with different occlusal thicknessesen
dc.typeArtigo
unesp.author.orcid0000-0002-0734-7926[1]
unesp.author.orcid0000-0001-6918-9655[2]
unesp.author.orcid0000-0002-7162-0747[3]
unesp.author.orcid0000-0002-5006-2184[4]
unesp.author.orcid0000-0001-6867-8350[5]

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