Abstract
Aim This study aimed to assess shear bond strength (SBS) of resin cement to zirconia ceramic with different surface treatments by using Single Bond Universal. Methods In this in vitro study, 50 zirconia discs (2 × 6 mm) were divided into 5 groups of (I) sandblasting with silica-coated alumina (CoJet) + silane + Single Bond 2, (II) sandblasting with CoJet + Single Bond Universal, (III) sandblasting with alumina + Single Bond Universal, (IV) sandblasting with alumina + Z-Prime Plus, and (V) Single Bond Universal with no surface treatment. Resin cement was applied in plastic tubes (3 × 5 mm2), and after 10,000 thermal cycles, the SBS was measured by a universal testing machine. The mode of failure was determined under a stereomicroscope at × 40 magnification. Data were analyzed using one-way ANOVA. Results The maximum (6.56 ± 4.29 MPa) and minimum (1.94 ± 1.96 MPa) SBS values were noted in groups III and I, respectively. Group III had the highest frequency of mixed failure (60%). Group V had the maximum frequency of adhesive failure (100%). Conclusion Single Bond Universal + sandblasting with alumina or silica-coated alumina particles is an acceptable method to provide a strong SBS between resin cement and zirconia.
Highlights
Due to the increased demand for cosmetic restorations, ceramic restorations have become increasingly popular in the recent years [1]
All specimens were sintered at 1550°C and polished with 600-grit carbide paper. e specimens were randomly divided into 5 groups (n 10) as follows: Group I: ten discs were sandblasted with 30 μm silicacoated alumina particles
Assessment of the mode of failure under a stereomicroscope revealed that the frequency of mixed failure was the highest (60%) in group III. e maximum frequency of adhesive failure (100%) was noted in group V (Single Bond Universal) (Table 3)
Summary
Due to the increased demand for cosmetic restorations, ceramic restorations have become increasingly popular in the recent years [1]. Zirconia has gained growing popularity for dental applications in the recent years due to its favorable optical and mechanical properties and excellent biocompatibility. It can serve as an alternative to metal-ceramic restorations. E bond strength of zirconia depends on surface roughness and type of bonding agent used. Zirconia does not have a glass phase. Us, it cannot be etched with hydrofluoric acid [3] and requires other surface treatments such as preparation with diamond burs, sandblasting with aluminum oxide and silica-coated alumina particles (CoJet), Nd: YAG, Er:YAG, or CO2 laser irradiation, or a combination of these methods [6, 7] Zirconia does not have a glass phase. us, it cannot be etched with hydrofluoric acid [3] and requires other surface treatments such as preparation with diamond burs, sandblasting with aluminum oxide and silica-coated alumina particles (CoJet), Nd: YAG, Er:YAG, or CO2 laser irradiation, or a combination of these methods [6, 7]
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