Effect of Different Coloring Procedures on the Aging Behavior of Dental Monolithic Zirconia

Table 4

Means and standard deviations of (%) for each group.

Materials	PRE-C	PRE-5	PRE-10	PRE-20	DIP-C	DIP-5	DIP-10	DIP-20
SuperfectZir HTS	3.44 (0.23)^a,A	11.98 (2.33)^a,B	15.41 (3.37)^a,C	37.58 (3.54)^a,D	3.43 (0.01)^a,A	7.40 (0.61)^a,B	11.48 (0.88)^a,C	31.47 (1.53)^a,D
Katana HT	3.14 (0.01)^a,A	7.89 (0.74)^b,B	11.38 (1.22)^b,C	18.71 (1.85)^a,D	3.06 (0.53)^a,A	7.26 (0.15)^a,B	8.49 (0.67)^b,C	14.64 (2.02)^b,D

Values marked with the same lowercase letter were not significantly different within a column (). Values marked with the same uppercase letter were not significantly different in each group ().