Influence of Y-TZP ceramic treatment and different resin cements on bond strength to dentin
Contribuinte(s) |
Universidade Estadual Paulista (UNESP) |
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Data(s) |
20/05/2014
20/05/2014
01/11/2012
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Resumo |
Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP) Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq) Objectives. Evaluating the bond strength (sigma) of resin cement systems (RXA - RelyX ARC; RXU - RelyX U100; and PF - Panavia F) to dentin and yttria-stabilized zirconia-based ceramic (YZ - In-Ceram YZ) after different surface treatments and aging.Methods. Occlusal dentin of 54 human molars was exposed and conditioned following manufacturers' instructions. Fifty-four YZ blocks were sintered and divided into two groups according to surface treatment: PA - airborne particle abrasion, and SC - tribochemical silica coating. All treated YZ blocks were cemented to dentin using one of the cement systems (RXA, RXU, and PF) following manufacturers' recommendations, which includes specific silane agents. Teeth-cement-ceramic blocks were stored in 37 degrees C distilled water for 24 h before cutting into non-trimming bar-shaped specimens (adhesive area, A = 1 +/- 0.1 mm(2)). Specimens (n >= 12) were assigned to one of the following conditions: N - no storage; W stored in 37 degrees C distilled water for 60 days; and TC - thermal cycling (5-55. C; 10,000 cycles). All specimens were loaded in tension (F) to failure using a universal testing machine. The sigma (F/A) was calculated and data were statistically analyzed using ANOVA and Tukey tests (alpha = 0.05). Fracture surfaces were examined to determine the failure mode.Results. RXA-SC and PF-PA specimens showed the greatest mean sigma values after N (13.9 and 13.0 MPa, respectively) and TC (12.9 and 14.8 MPa, respectively). SC-treated showed greater mean sigma values than PA-treated YZ specimens after W.Significance. Regardless of the cement used, W and TC did not significantly reduce the sigma of SC-treated YZ resin bonded to dentin. (c) 2012 Published by Elsevier Ltd on behalf of Academy of Dental Materials. All rights reserved. |
Formato |
91-97 |
Identificador |
http://dx.doi.org/10.1016/j.dental.2012.09.003 Dental Materials. Oxford: Elsevier B.V., v. 28, n. 11, p. 91-97, 2012. 0109-5641 http://hdl.handle.net/11449/22833 10.1016/j.dental.2012.09.003 WOS:000309605700011 |
Idioma(s) |
eng |
Publicador |
Elsevier B.V. |
Relação |
Dental Materials |
Direitos |
closedAccess |
Palavras-Chave | #Zirconia ceramic #Resin cement #Surface treatment #Aging #Adhesion #Bond strength |
Tipo |
info:eu-repo/semantics/article |