Bond Strength of Resin Cements to Zirconia after Surface Treatments
Abstract
Air-abrasion with glass beads may reportedly be less likely to weaken cubic-containing zirconia compared to air abrasion with aluminum oxide. However, the effect of air-abrasion with glass beads on the bond strength of resin cement to cubic-containing zirconia is less known. Aim: The purpose of this study was to evaluate the effects of air abrasion with aluminum oxide or glass beads on the shear bond strength of resin cement to three types of zirconia containing various levels of cubic crystalline phases (3Y-TZP, Katana ML; 4Y- PSZ, Katana STML; and 5Y- PSZ, Katana UTML, Noritake). Materials and methods: Thirty block specimens (8x8x3.5mm) were milled out of each zirconia material and mounted in plastic pipe. Ten specimens of each of the zirconia materials were air-abraded using 50m aluminum-oxide particles; ten specimens were abraded using 80 m glass beads; and ten specimens served as a control and received no surface treatment. A 10-MDP primer was applied to the surface of the zirconia specimens. Composite discs were bonded using a resin cement and light cured. The specimens were stored in 37C distilled water for 24 hours and thermocycled for 2,500 cycles. The specimens were loaded in shear on a universal testing machine. Data were analyzed with one- and two-way ANOVAs and Tukey post hoc tests (alpha=0.05). Results: A significant difference in shear bond strength was found based on surface treatment (p<0.001), but not on type of zirconia (p=0.132). Conclusion: Air-abrasion with glass beads or no surface treatment resulted in significantly lower bond strength of the resin cement to all three zirconia types compared to air-abrasion with aluminum oxide. Clinical significance: Although air-abrasion with aluminum oxide may reportedly be more likely to weaken cubic-containing zirconia compared to air abrasion with glass beads, the use of aluminum oxide results in greater bond strength of the resin cement.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jul 21, 2020
- Accession Number
- AD1104252
Entities
Organizations
- 59th Medical Wing