Results. LC of the porcelains were 22% (A and B); 6% (C); 15% (D); 0% (E and F); and 13% (G).
Except for porcelains A and D, all materials showed a decrease in their n values when stored
in artificial saliva. However, the decrease was more pronounced for porcelains B, F, and G.
Ranking of materials varied according to storage media (in air, porcelain G showed higher n
compared to A, while in saliva both showed similar coefficients). No correlation was found
between n values and LC in air or saliva.