Porcelain combined with zirconia core substructure has low fracture toughness. Nanoparticles are incorporated into the porcelain to boost its mechanical properties.
The flexural strength of feldspathic porcelain was measured (according to ISO specifications number 6872) after the incorporation of silver and titaniumoxidenanoparticles. For measuring the bond strength at the porcelain?zirconia interface, 70 bars (4 × 4 × 12 mm) of zirconia were cut and fired in a furnace. The control and nanoparticles?modified porcelainpowders were built up on the zirconia bars and fired to create veneers of 3 mm height, 4 mm width and 4 mm thickness. The porcelain veneers were de?attached from the zirconia core by the universal testing machine. The failure load was recorded to calculate the bond strength. Statistical
Analysis:
The data were analysed with one?way analysis of variance followed by Tukey’s test.