Table 2: Mean (SD) of values at different time intervals and storage media.

Material (thickness)Time intervalStorage media
WaterCoffee

Conventional (2 mm)2.1 (0.21)2.86 (0.34)
3.26 (0.22)4.97 (0.54)
4.41 (0.20)8.11 (0.46)
5.59 (0.26)11.34 (0.56)

Bulk-fill (2 mm)3.39 (0.36)7.64 (0.58)
4.03 (0.33)11.26 (0.61)
5.14 (0.24)13.84 (0.75)
7.57 (0.34)17.02 (0.86)

Bulk-fill (4 mm)3.12 (0.22)8.00 (0.53)
4.52 (0.24)11.77 (0.44)
5.61 (0.28)17.11 (0.52)
7.50 (0.35)21.31 (0.40)

,   between 1 day and baseline; , between 7 days and baseline; , between 14 days and baseline; , between 28 days and baseline. Different lowercase letters indicate statistically significant differences between the media (). Different uppercase letters indicate statistically significant differences between materials ().