Substrate Rigidity Effect on CAD/CAM Restorations at Different Thicknesses

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dc.contributor.authorPucci, César Rogério [UNESP]
dc.contributor.authorMafetano, Ana Paula Valente Pinho [UNESP]
dc.contributor.authorBorges, Alexandre Luiz Souto [UNESP]
dc.contributor.authorDe Andrade, Guilherme Schmitt
dc.contributor.authorDal Piva, Amanda Maria De Oliveira
dc.contributor.authorKleverlaan, Cornelis J.
dc.contributor.authorTribst, João Paulo Mendes
dc.contributor.institutionUniversidade Estadual Paulista (UNESP)
dc.contributor.institutionUniversidade Estadual Do Oeste Do Paraná (UNIOESTE)
dc.contributor.institutionVrije Universiteit
dc.date.accessioned2023-07-29T13:34:21Z
dc.date.available2023-07-29T13:34:21Z
dc.date.issued2022-01-01
dc.description.abstractObjectives  This article evaluated the effect of substrates rigidities on the post-fatigue fracture resistance of adhesively cemented simplified restorations in lithium disilicate glass ceramic. Methods  Precrystalized computer-aided design/computer-aided manufacturing ceramic blocks were processed into disc-shaped specimens (n = 10, O = 10 mm), mimicking a simplified restoration at two thicknesses (0.5 and 1.0 mm). Thereafter, the discs were cemented onto different base substrates (dentin analogue [control], dentin analogue with a central core build-up of resin composite [RC], or glass ionomer cement [GIC]). The specimens were subjected to mechanical cycling in a chewing simulator (100 N, 1 × 10 6cycles, 4 Hz) and then subjected to thermocycling aging (10,000 cycles, 5/37/55°C, 30 seconds). After the fatigue protocol, the specimens were loaded until failure (N) in a universal testing machine. Finite element analysis calculated the first principal stress at the center of the adhesive interface. Results  The results showed that restoration thickness, type of substrate, and their interaction were statistically significant (one-way analysis of variance; p < 0.001). Regardless the restoration thickness a higher fracture load was observed for specimens cemented to dentin analogue. Among the base materials, RC build-up presented the highest fracture load and lower stress magnitude for both restoration thicknesses in comparison with GIC build-up. The 0.5-mm restoration showed higher stress peak and lower fracture load when submitted to the compressive test. Conclusion  More flexible base material reduces the fracture load and increases the stress magnitude of adhesively cemented lithium disilicate restorations regardless the ceramic thickness. Therefore, more rigid substrates are suggested to be used to prevent restoration mechanical failures.en
dc.description.affiliationDepartment of Restorative Dentistry Institute of Science and Technology São Paulo State University (Unesp), São José dos Campos
dc.description.affiliationDepartment of Dentistry Universidade Estadual Do Oeste Do Paraná (UNIOESTE)
dc.description.affiliationDepartment of Dental Materials Science Academic Centre for Dentistry Amsterdam (ACTA) Universiteit Van Amsterdam Vrije Universiteit
dc.description.affiliationDepartment of Oral Regenerative Medicine Academic Centre for Dentistry Amsterdam (ACTA) Universiteit Van Amsterdam Vrije Universiteit
dc.description.affiliationUnespDepartment of Restorative Dentistry Institute of Science and Technology São Paulo State University (Unesp), São José dos Campos
dc.identifierhttp://dx.doi.org/10.1055/s-0042-1757910
dc.identifier.citationEuropean Journal of Dentistry.
dc.identifier.doi10.1055/s-0042-1757910
dc.identifier.issn1305-7464
dc.identifier.issn1305-7456
dc.identifier.scopus2-s2.0-85144864468
dc.identifier.urihttp://hdl.handle.net/11449/248094
dc.language.isoeng
dc.relation.ispartofEuropean Journal of Dentistry
dc.sourceScopus
dc.subjectadhesion
dc.subjectcyclic loading
dc.subjectdental ceramics
dc.subjectfinite element analysis
dc.subjectmonolithic restorations.
dc.titleSubstrate Rigidity Effect on CAD/CAM Restorations at Different Thicknessesen
dc.typeArtigo
unesp.author.orcid0000-0003-4830-0400[1]
unesp.author.orcid0000-0001-8123-2177[2]
unesp.author.orcid0000-0002-5707-7565[3]
unesp.author.orcid0000-0002-5697-2947[4]
unesp.author.orcid0000-0002-3844-2053[5]
unesp.author.orcid0000-0002-3218-8031[6]
unesp.author.orcid0000-0002-5412-3546[7]

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Artigos - Odontologia Restauradora - ICT