Flexural Strength of Glass-Infiltrated Zirconia/Alumina-Based Ceramics and Feldspathic Veneering Porcelains

dc.contributorUniversidade Estadual Paulista (UNESP)
dc.creatorBottino, Marco Antonio
dc.creatorSalazar-Marocho, Susana M.
dc.creatorLeite, Fabiola P. P.
dc.creatorVasquez, Vanessa C.
dc.creatorValandro, Luiz Felipe
dc.date2014-05-20T14:05:03Z
dc.date2016-10-25T17:10:32Z
dc.date2014-05-20T14:05:03Z
dc.date2016-10-25T17:10:32Z
dc.date2009-07-01
dc.date.accessioned2017-04-05T21:33:43Z
dc.date.available2017-04-05T21:33:43Z
dc.identifierJournal of Prosthodontics-implant Esthetic and Reconstructive Dentistry. Malden: Wiley-blackwell, v. 18, n. 5, p. 417-420, 2009.
dc.identifier1059-941X
dc.identifierhttp://hdl.handle.net/11449/22811
dc.identifierhttp://acervodigital.unesp.br/handle/11449/22811
dc.identifier10.1111/j.1532-849X.2009.00462.x
dc.identifierWOS:000207914500008
dc.identifierhttp://dx.doi.org/10.1111/j.1532-849X.2009.00462.x
dc.identifier.urihttp://repositorioslatinoamericanos.uchile.cl/handle/2250/868165
dc.descriptionPurpose: To compare the flexural strength of two glass-infiltrated high-strength ceramics and two veneering glass-ceramics.Materials and Methods: Four ceramic materials were tested: two glass-infiltrated high-strength ceramics used as framework in metal-free restorations [In-Ceram Zirconia IZ (Gr1) and In-Ceram Alumina IA (Gr2)], and two glass-ceramics used as veneering material in metal-free restorations [Vita VM7 (Gr3) and Vitadur-alpha (Gr4)]. Bar specimens (25 x 5 x 2 mm(3)) made from core ceramics, alumina, and zirconia/alumina composites were prepared and applied to a silicone mold, which rested on a base from a gypsum die material. The IZ and IA specimens were partially sintered in an In-Ceram furnace according to the firing cycle of each material, and then were infiltrated with a low-viscosity glass to yield bar specimens of high density and strength. The Vita VM7 and Vitadur-alpha specimens were made from veneering materials, by vibration of slurry porcelain powder and condensation into a two-part brass Teflon matrix (25 x 5 x 2 mm(3)). Excess water was removed with absorbent paper. The veneering ceramic specimens were then removed from the matrix and were fired as recommended by the manufacturer. Another ceramic application and sintering were performed to compensate the contraction of the feldspar ceramic. The bar specimens were then tested in a three-point bending test.Results: The core materials (Gr1: 436.1 +/- 54.8; Gr2: 419.4 +/- 83.8) presented significantly higher flexural strength (MPa) than the veneer ceramics (Gr3: 63.5 +/- 9.9; Gr4: 57.8 +/- 12.7).Conclusion: In-Ceram Alumina and Zirconia were similar statistically and more resistant than VM7 and Vitadur-alpha.
dc.languageeng
dc.publisherWiley-Blackwell
dc.relationJournal of Prosthodontics-implant Esthetic and Reconstructive Dentistry
dc.rightsinfo:eu-repo/semantics/closedAccess
dc.subjectFlexural strength
dc.subjectzirconia
dc.subjectalumina
dc.subjectglass-ceramic
dc.titleFlexural Strength of Glass-Infiltrated Zirconia/Alumina-Based Ceramics and Feldspathic Veneering Porcelains
dc.typeOtro


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