Effect of Different Surface Treatments on Shear Bond Strength of Zirconia Y-TZP Bonded with Resin Cement
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Abstract
Objective: To study shear bond strength between resin cement and Y-TZP by various surface treatments.
Materials and Methods: One hundred and twenty Y-TZP plates were fabricated in size of 7 x 7 x 1 mm3 Randomly divided into six groups by type of surface treatment for 20 samples per group: Group 1: Control, Group 2: Sandblasted with 50-micron abrasive alumina airborne particles under pressure 4 bar for 20 secs, Group 3: Acid etched with 48% hydrofluoric for 15 minutes, Group 4: Acid etched with Piranha’s solution for 1 minute, Group 5: Sandblasted with 50-micron abrasive alumina airborne particles plus 48% hydrofluoric, Group 6: Sandblasted with 50-micron abrasive alumina airborne particles plus Piranha’s solution. Specimens were bonded with RelyX U200 resin cement then stored in distilled water at 37◦C for 24 hours then tested in universal testing machine for shear bond strength at crosshead speed 0.5 mm per minute. Statistical analysis of the mean shear bond strength was performed by one-way ANOVA and the failure mode was investigated under light microscope at 40 magnifications.
Results: Group of Y-TZP plate surface abraded with 50-micron abrasive alumina airborne particle plus 48% hydrofluoric group showed the highest mean shear bond strength (p<0.05).
Conclusion: Various Y-TZP surface treatment methods affected the mean shear bond strength and retentive patterns. Group of Y-TZP surface abraded with 50-micron abrasive alumina airborne particle plus 48% hydrofluoric group showed the highest mean shear bond strength and roughness surface topography.
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References
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