Improving adhesion between luting cement and zirconia-based ceramic with an alternative surface treatment
Aurealice Rosa Maria Martins1, Valéria Bisinoto Gotti1, Marcos Massao Shimano2
1Department of Restorative Dentistry, Piracicaba Dental School, Universidade Estadual de Campinas, Piracicaba, SP, Brazil.
Brazilian Oral Research
|April 11, 2015
Summary
This study found that applying glass particles to zirconia surfaces significantly improves bond strength with dental cements. This alternative surface treatment enhances the interaction between ceramic and luting cement, reducing adhesive failures.
Area of Science:
- Dental Materials Science
- Biomaterials Engineering
- Ceramic Restorations
Background:
- Zirconia-based ceramics are widely used in dental restorations due to their mechanical properties.
- Achieving durable bonds between zirconia and luting cements is crucial for restoration longevity.
- Current surface treatments for zirconia may have limitations in optimizing cement adhesion.
Purpose of the Study:
- To evaluate the effect of an alternative surface treatment using glass beads on the microshear bond strength (μsbs) of zirconia.
- To compare different concentrations of glass beads in a gel application versus traditional air blasting.
- To determine if glass application improves the interaction between zirconia and luting cement.
Main Methods:
- Thirty-five zirconia disks were divided into five groups: Control, air-blasted glass beads, and three experimental groups with varying concentrations (15%, 25%, 50%) of glass beads in a gel.
- Specimens were bonded with RelyX ARC® cement and tested for microshear bond strength (μsbs) at 0.5 mm/min.
- Statistical analysis using ANOVA and Tukey's test (p < 0.05) was performed on bond strength values (MPa).
Main Results:
- The control group exhibited the lowest μsbs (15.6 ± 4.1 MPa).
- All experimental groups (G1, G2, G3, G4) showed significantly higher μsbs compared to the control, with no statistical difference among them (ranging from 24.9 ± 7.4 MPa to 35.3 ± 6.0 MPa).
- Higher concentrations of glass in the surface treatment correlated with a lower frequency of adhesive failures.
Conclusions:
- The application of glass particles, particularly in a gel formulation, effectively enhances the bond strength of zirconia-based ceramics to luting cements.
- This alternative surface treatment improves the micromechanical interaction at the ceramic-cement interface.
- The findings suggest a promising method for improving the clinical performance and longevity of zirconia dental restorations.
