Effect of MDP-Based Primers on the Luting Agent Bond to Y-TZP Ceramic and to Dentin

الملخص EN

Purpose.

The aim of this study was to evaluate the influence of multimode MDP-based primers and different application protocols on the bond strength of a representative resin cement to an yttrium stabilized tetragonal zirconia (Y-TZP) ceramic.

Materials and Methods.

The occlusal dentin from 60 human molars was exposed.

The teeth and zirconia cylinders (N = 60) (3 mm of diameter; 4 mm of height) were divided into six groups (n = 10) according to the ceramic surface conditioning: (1) air abraded with SiO2 particles; (2) Z-Prime Plus; (3) air abraded with SiO2 particles + Z-Prime Plus; (4) air abraded with SiO2 particles + All-Bond Universal; (5) air abraded with SiO2 particles + ScotchBond Universal Adhesive; and (6) untreated zirconia.

The luting agent (Duo-Link cement) was applied on the treated dentin surface.

Specimens were stored in water (37°C, 24 h) and tested in shear bond strength.

Data were statistically analyzed using 2-way ANOVA and Post hoc Tukey tests (α = 0.05).

Results.

Significant effects of ceramic conditioning were found (p<0.0001).

The specimens sandblasted with silica particles followed by the application of Z-Prime Plus or All-Bond Universal presented greater bond strength values.

For the untreated zirconia, several specimens failed prematurely prior to testing.

Conclusions.

Sandblasting with silica particles combined with Z-Prime Plus increased the bond strength.