Abstract
The present work aims to remedy the lack in the literature regarding the optical behavior of the extrinsic characterization layer of a lithium silicate ceramic with zirconia (Celtra Duo). So, Celtra Duo ceramic blocks will be cylindrical in dimensions 12 mm and cut in a precision cutting machine in 1.2 mm, with the samples having final dimensions of 12 x 1.2 mm. Then, the specimens will b…