Table 1.

Differences in mean L* among study groups

Groups	Room temperature	High temperature	a p
	Mean L* ± SD	Mean L* ± SD
Control group	60.56 ± 3.58	64.68 ± 5.21	0.001*
White	65.03 ± 4.15	54.58 ± 4.61	<0.001*
Blue	62.54 ± 4.20	57.36 ± 5.52	<0.001*
Yellow	64.05 ± 4.88	58.74 ± 6.21	0.001*
Green	61.49 ± 4.91	59.71 ± 6.35	0.230
Reddish-brown	62.18 ± 4.34	60.52 ± 3.79	0.119

^aIndependent samples t test

*p < 0.05