Abstract
The aim of this study will be to evaluate the influence of erosive challenge and immersion in coloring solutions on the optical properties of two glass ceramics for CAD/CAM, submitted to different surface treatments, then 170 specimens of each glass ceramic tested will be manufactured: (FC) feldspar ceramic (CEREC Blocs) and (LS) ceramic based on lithium disilicate (IPS e.max CAD) which w…