Influence of CAD-CAM diamond bur deterioration on surface roughness and maximum failure load of Y-TZP-based restorations

dc.contributorUniversidade Estadual Paulista (UNESP)
dc.creatorCorazza, Pedro Henrique
dc.creatorCastro, Humberto Lago de
dc.creatorFeitosa, Sabrina Alves
dc.creatorKimpara, Estevão Tomomitsu
dc.creatorBona, Alvaro Della
dc.date2015-10-21T13:15:21Z
dc.date2016-10-25T21:06:26Z
dc.date2015-10-21T13:15:21Z
dc.date2016-10-25T21:06:26Z
dc.date2015-04-01
dc.date.accessioned2017-04-06T09:02:13Z
dc.date.available2017-04-06T09:02:13Z
dc.identifierAmerican Journal of Dentistry. Weston: Mosher &linder, Inc, v. 28, n. 2, p. 95-99, 2015.
dc.identifier0894-8275
dc.identifierhttp://hdl.handle.net/11449/128903
dc.identifierhttp://acervodigital.unesp.br/handle/11449/128903
dc.identifierWOS:000355044700007
dc.identifierhttp://www.amjdent.com/Archive/Abstracts/2015/April%202015%20Abstracts.html#Corazza
dc.identifier.urihttp://repositorioslatinoamericanos.uchile.cl/handle/2250/939459
dc.descriptionPurpose: To investigate the influence of CAD-CAM diamond bur deterioration on surface roughness (Ra) and maximum failure load (Lf) of Y-TZP-based ceramic (YZ) substructures (SB) veneered with a feldspathic porcelain. Methods: Two sets of burs (B1 and B2) were used to fabricate 30 YZ SB each in a CAD/CAM system (Cerec In Lab). The SB were identified (1-30) according to the milling sequence (MS). SEM images of the burs were recorded before milling, and after milling 15 and 30 SB. The SB Ra was measured. All SB were veneered, cemented onto a fiber reinforced epoxy resin die, and loaded to failure. Specimens from B1 group were cyclic fatigued (106 cycles) before loading to failure. Fractographic analysis was performed. Data were statistically analyzed using Student's t-test, Weibull analysis, Pearson's correlation and ANOVA (alpha=0.05). Results: The mean Ra value of B1 specimens was statistically greater than B2. Weibull modulus of B1 and B2 were statistically similar. The correlation between MS and Lf was not statistically significant for the groups. MS and Ra had significant correlation for both groups (B1: r=-0.514, P=0.015; B2: r=-0.462, P=0.03). Although the visual aspect (SEM) of the burs was similar after 30 millings, the mean Ra values were significantly different after 27 millings for B1 and 24 millings for B2.
dc.descriptionFundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
dc.descriptionConselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
dc.languageeng
dc.publisherMosher &linder, Inc
dc.relationAmerican Journal Of Dentistry
dc.rightsinfo:eu-repo/semantics/closedAccess
dc.titleInfluence of CAD-CAM diamond bur deterioration on surface roughness and maximum failure load of Y-TZP-based restorations
dc.typeOtro


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