Table 3: Extent of acid-base reaction (EAB) of materials at different depths and postirradiation times (mean and SD in parentheses).

MaterialDepth 10 min1 day7 days

FL0 mm2.0 (0.2) a3.8 (0.5) b5.7 (0.4) c
1 mm2.4 (0.3) a4.1 (0.7) b5.8 (0.8) c
2 mm2.6 (0.5) a3.8 (0.6) b5.5 (0.4) c
4 mm2.6 (0.4) a3.7 (0.3) b5.6 (0.5) c

FF0 mm6.8 (0.6) a11.2 (1.1) b12.5 (1.6) b
1 mm6.3 (0.9) a17.1 (1.3) c17.9 (2.4) c
2 mm7.4 (1.1) a16.9 (1.9) c18.0 (2.3) c
4 mm7.7 (1.4) a23.1 (3.8) d22.2 (3.5) d

VT0 mm1.3 (0.2) a2.6 (0.4) b4.1 (0.5) ce
1 mm1.0 (0.1) a2.9 (0.4) b4.5 (0.4) e
2 mm1.1 (0.2) a3.7 (0.5) c4.6 (0.7) e
4 mm1.3 (0.2) a5.5 (0.9) d6.4 (0.8) f

Within the same material, means with same lowercase letters indicate no statistically significant difference between the groups ( > 0.05).