Table 3.

Mean (SD) degree of conversion (%) of composites in different increment thicknesses

	1 mm	1.5 mm	3 mm	P-value
Filtek Z250	44.91 (6.42) Ab	40.87 (0.41) ABb	34.32 (5.75) Bb	P=0.004
SureFil SDR Flow	59.34 (1.69) Aa	58.21 (0.72) Aa	57.11 (2.12) Aa
N’Durance	39.68 (1.20) Ab	37.90 (6.37) Ab	30.00 (11.79) Bb	P=0.008
P-value	P=0.001	P=0.001	P=0.001

Notes: Means followed by distinct letters (uppercase in horizontal and lowercase in vertical comparison) differ from each other (P≤0.05).