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  • Title: [Influence of tribochemical silica coating on shear bond strength of a dental zirconia ceramic to resin cements].
    Author: Cheng H, Dong C, Zhang FQ.
    Journal: Shanghai Kou Qiang Yi Xue; 2018 Jun; 27(3):248-251. PubMed ID: 30411117.
    Abstract:
    PURPOSE: To evaluate the effect of tribochemical silica coating for zirconia bonding. METHODS: Sixty cut and fully sintered Lava frame zirconia blocks were randomly divided into 6 groups and subjected to 3 different surface treatments and 2 kinds of resin cement.The surface treatments were airborne-particle abrasion/silane, airborne-particle abrasion/CoJet Sand (tribochemical silica coating) /silane and no treatment(control), resin cements were RelyX Unicem and Panavia F2.0. Half of the specimens in each group were randomly chosen and stored in 37℃ distilled water for 24h, the others were thermocycled (5℃ and 55℃) for 5000 cycles. All specimens were subjected to shear bond strength(SBS) testing. SBS values were analyzed by two-way ANOVA and t test, and multiple pairwise comparisons were then completed with post hoc Tukey test. Statistical analysis was performed using SPSS23.0 software package for Windows. RESULTS: Airborne-particle abrasion/CoJet sand/silane group resulted in a significantly higher SBS than those in other groups (P<0.001). After thermocycling, the bond strengths in the airborne-particle abrasion/CoJet Sand/silane groups bonded with RelyX Unicem showed no significantly decrease while marked drop appeared in all other groups. CONCLUSIONS: Combination of tribochemical silica coating with silane coupling can effectively enforce the bond strengths of zirconia (Y-TZP). Attention should be paid to the interaction between surface treatments and resin cements.
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