Agent
Irradiation
Initial
Stained
Final
Whiteness HP
Group 1
90.8 ± 1.3
77.6 ± 7.7
80.6 ± 8.1
Group 2
90.9 ± 1.7
84.3 ± 5.9
89.3 ± 2.1
Group 3
91.0 ± 1.4
85.9 ± 6.1
90.2 ± 2.0
Group 4
91.1 ± 1.3
86.1 ± 7.3
91.4 ± 1.2
Table 1:
Mean Values and Standard Deviation of
L*
.
