Table 2.

The minimal distal dentine thicknesses of ML canals in danger zone (mean ± SD, mm)

Groups	Men					Women
	1 mm	2 mm	3 mm	4 mm	5 mm	1 mm	2 mm	3 mm	4 mm	5 mm
18–30 y	0.98 ± 0.14	0.82 ± 0.13	0.79 ± 0.12	0.79 ± 0.13	0.80 ± 0.10	0.98 ± 0.16	0.80 ± 0.12	0.77 ± 0.12	0.77 ± 0.13	0.78 ± 0.13
31–50 y	1.00 ± 0.17	0.84 ± 0.15	0.79 ± 0.13	0.79 ± 0.12	0.80 ± 0.13	0.99 ± 0.17	0.82 ± 0.14	0.80 ± 0.13	0.79 ± 0.12	0.80 ± 0.13
51–60 y	1.02 ± 0.17	0.86 ± 0.15	0.82 ± 0.14	0.82 ± 0.13	0.83 ± 0.12	1.02 ± 0.17	0.84 ± 0.14	0.81 ± 0.13	0.82 ± 0.14	0.82 ± 0.13
Total	1.01 ± 0.17	0.84 ± 0.15	0.80 ± 0.13	0.80 ± 0.13	0.81 ± 0.12	0.99 ± 0.17	0.82 ± 0.13	0.79 ± 0.13	0.79 ± 0.13	0.80 ± 0.13