Influence of Y-TZP ceramic treatment and different resin cements on bond strength to dentin

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Elsevier B.V.


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.



Zirconia ceramic, Resin cement, Surface treatment, Aging, Adhesion, Bond strength

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Dental Materials. Oxford: Elsevier B.V., v. 28, n. 11, p. 91-97, 2012.