. 2014 Jan 22;9:30. doi: 10.1186/1748-717X-9-30

Table 2.

Mean and standard deviations of the longitudinal microhardness values (Knoop) of the dentin at different depths of the deciduous teeth following irradiation

	Surface dentin	Middle dentin	Deep dentin
Control (nonirradiated)	30.81 ± 5.06^a	31.53 ± 7.94^▲	24.24 ± 8.47^A
Irradiated 10 Gy	25.22 ± 4.66^b	27.41 ± 7.52^▲	18.79 ± 6.18^B
Irradiated 20 Gy	26.07 ± 3.32^b	31.51 ± 5.59^▲	19.26 ± 3.33^AB
Irradiated 30 Gy	26.50 ± 5.31^b	28.86 ± 6.78^▲	19.03 ± 5.20^AB
Irradiated 40 Gy	26.54 ± 3.53^b	28.98 ± 5.07^▲	21.50 ± 8.08^AB
Irradiated 50 Gy	28.48 ± 2.98^ab	30.82 ± 5.49^▲	20.86 ± 7.08^AB
Irradiated 60 Gy	27.84 ± 3.13^ab	30.37 ± 6.76^▲	21,92 ± 5.78^AB

Identical symbols (^{▲AB, ab}) denote statistical similarity within the column.