Palla ES, et al. - Here, the physicians investigated color variations of lithium disilicate ceramics after thermal cycling (TC) and immersion in commonly consumed beverages. Except for Press without glazing (PNG) in tea which showed statistically significant color differences (ΔΕ>4), all groups showed color changes below the clinically perceptible level (ΔΕ<3.7). Compared with the nonglazed Press specimens, computer-aided design (CAD) presented higher color stability.