In-lab simulation of CAD/CAM milling of lithium disilicate glass-ceramic specimens: Effect on the fatigue behavior of the bonded ceramic

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MetadadosDescriçãoIdioma
Autor(es): dc.contributorFederal University of Santa Maria-
Autor(es): dc.contributorUniversidade Estadual Paulista (Unesp)-
Autor(es): dc.creatorPilecco, Rafaela Oliveira-
Autor(es): dc.creatorDalla-Nora, Fernanda-
Autor(es): dc.creatorGuilardi, Luís Felipe-
Autor(es): dc.creatorPereira, Gabriel Kalil Rocha-
Autor(es): dc.creatorde Andrade, Guilherme Schmitt [UNESP]-
Autor(es): dc.creatorde Melo, Renata Marques [UNESP]-
Autor(es): dc.creatorValandro, Luiz Felipe-
Autor(es): dc.creatorRippe, Marília Pivetta-
Data de aceite: dc.date.accessioned2022-02-22T00:51:37Z-
Data de disponibilização: dc.date.available2022-02-22T00:51:37Z-
Data de envio: dc.date.issued2021-06-25-
Data de envio: dc.date.issued2021-06-25-
Data de envio: dc.date.issued2021-09-01-
Fonte completa do material: dc.identifierhttp://dx.doi.org/10.1016/j.jmbbm.2021.104604-
Fonte completa do material: dc.identifierhttp://hdl.handle.net/11449/207866-
Fonte: dc.identifier.urihttp://educapes.capes.gov.br/handle/11449/207866-
Descrição: dc.descriptionThe aim of this study was to evaluate the effect of in-lab simulation procedures performed on a lithium disilicate ceramic luted to a dentin-analogue material regarding the fatigue performance and topographic changes. Lithium disilicate ceramic (IPS e.max CAD) discs (Ø = 13.5 mm and 1.5 mm of thickness) were produced in different ways: milled in a CAD/CAM system (CAD/CAM – control group); mirror-polished (POL group); produced in-lab and ground with #60 silicon carbide paper (SiC group); with #60 wood sandpaper (WS group); with a fine diamond bur (DB group); or with a CAD/CAM bur adapted in a handpiece with a custom mandrel (MANDREL group). The ceramic discs were adhesively luted (Multilink N) onto dentin analogue discs (Ø = 12 mm and 2 mm of thickness) and fatigue testing (n = 19 discs) was performed by step-stress methodology (initial load of 200 N; step-size of 50 N; 10,000 cycles per step; 20 Hz). Surface roughness and contact angle analysis were also performed. According to Kaplan-Meier and post-hoc Mantel-Cox (log-rank), distinct fabrication methods affected the fatigue performance of bonded glass-ceramic discs (p< 0.001). The CAD/CAM group presented the lowest fatigue failure loads (1250 N) and number of cycles for failure (185,000), while the POL groups obtained the highest results (1752 N; 284,444 cycles). The in-lab groups had intermediate values (1355 – 1526 N; 206,052 – 238,684 cycles). Polished specimens presented the lowest roughness values (Ra = 0.041 μm), while the SiC (1.604 μm), WS (1.701 μm), and MANDREL (1.867 μm) groups showed statistically similar roughness values to the CAD/CAM group (1.738 μm). Despite differences before etching, the contact angle was similar among the milled and simulated groups after etching, except for the polished group. Even with some topographic similarities, the tested in-lab simulation methods were not able to mimic the milled specimens in terms of fatigue findings, leading to distinct magnitude of overestimations of the results.-
Descrição: dc.descriptionMSciD and PhD Graduate Programs in Oral Science – Prosthodontic Units Faculty of Odontology Federal University of Santa Maria-
Descrição: dc.descriptionDepartment of Dental Materials and Prosthodontics Institute of Science and Technology ICT/SJC São Paulo State University – UNESP, São José dos Campos-
Descrição: dc.descriptionDepartment of Dental Materials and Prosthodontics Institute of Science and Technology ICT/SJC São Paulo State University – UNESP, São José dos Campos-
Idioma: dc.languageen-
Relação: dc.relationJournal of the Mechanical Behavior of Biomedical Materials-
???dc.source???: dc.sourceScopus-
Palavras-chave: dc.subjectBonding-
Palavras-chave: dc.subjectComputer-aided design/computer-aided manufacturing-
Palavras-chave: dc.subjectGrinding-
Palavras-chave: dc.subjectLithium disilicate-
Palavras-chave: dc.subjectMechanical behavior-
Palavras-chave: dc.subjectSurface properties-
Palavras-chave: dc.subjectSurvival probability-
Título: dc.titleIn-lab simulation of CAD/CAM milling of lithium disilicate glass-ceramic specimens: Effect on the fatigue behavior of the bonded ceramic-
Tipo de arquivo: dc.typelivro digital-
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