Evaluation of Wear Resistance of CAD/CAM Materials After Artificial Aging: An In Vitro Study

Aim: The purpose of this study is to assess the amount of surface wear and opposing wear of four Computer-Aided Design/Computer-Aided Manufacturing materials consisting of three hybrid materials (Vita Enamic, Cerasmart, Lava Ultimate) and a feldspathic ceramic (CEREC Blocs) after artificial aging. Materials and Methods: Samples were 400,000 mechanical loadings simultaneously with 500 thermal cycling, by using antagonist abrasive balls. The surface wear and roughness results were evaluated with one-way variance analysis and multiple comparisons were evaluated using the post-hoc LSD analysis methods ( p = .05). Results: The surface wears of Computer-Aided Design/Computer-Aided Manufacturing materials were, in order from lowest to highest, CEREC Blocs, Vita Enamic, Cerasmart, and Lava Ultimate. The differences among all groups wear results were statistically significant ( p < .05). After the chewing simulations of the antagonist balls were evaluated, there was only significant difference between the Cerasmart and Lava Ultimate ( p < .05). Conclusions: The hybrid materials showed more surface wear than the feldspathic ceramic.