Mechanical degradation of contemporary CAD/CAM resin composite materials after water ageing.

Objective: The aim of the present study was to assess the effect of water storage on the quasi-static properties and cyclic fatigue behavior of four contemporary CAD/CAM resin composite materials.

Methods: The CAD/CAM resin composites Grandio Blocs, Lava Ultimate, Cerasmart and Brilliant Crios, as well as the direct resin composite Grandio SO, were evaluated. Rectangular plates were cut from the blocks or fabricated using a silicon mold to obtain specimens for fracture toughness (K, n = 10), biaxial strength (σ, n = 30) and cyclic fatigue testing (n = 30).