Abstract
Background and Aim Zirconia is widely used as an aesthetic restorative material. Reliable bonding of zirconia ceramic is obtained by mechanical retention and chemical bonding of resin luting cement to ceramic substrate. Resin ceramic bonding is compromised in clinical settings when compared with clean lab settings. During try-in of restoration saliva contamination weakens the bond strength of zirconia to resin cement. The objective of this study was to investigate the effect of different cleaning solutions on the shear bond strength of resin cement to saliva-contaminated zirconia.Methods After saliva contamination zirconia disc specimens were cleaned with one of the four methods water rinsing Ivoclean 5 sodium hypochlorite and 1 hydrogen peroxide. Zirconia discs without saliva contamination were used as a control group. Resin cement cylinders were then built on zirconia discs using Rely X Unicem Automix resin cement. All specimens were stored at 37C in distilled water for 24 hours. The shear bond strength testing was performed by a universal testing machine. One-Way ANOVA test and Tukeyrsquos Post Hoc analysis were performed.Results Contaminated zirconia discs cleaned with Ivoclean and 5 sodium hypochlorite provided shear bond strength similar to the control group.Conclusion Ivoclean and 5 sodium hypochlorite were effective in cleaning the saliva-contaminated zirconia.nbsp
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