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Table 3 The minimal distal dentine thicknesses of mesial roots in danger zone according to root lengths (mean ± SD, mm)

From: Root dentine thickness of danger zone in mesial roots of mandibular first molars

Groups

Men

Women

1 mm

2 mm

3 mm

4 mm

5 mm

1 mm

2 mm

3 mm

4 mm

5 mm

long

0.97 ± 0.17

0.82 ± 0.13

0.78 ± 0.12

0.78 ± 0.11

0.78 ± 0.11

0.97 ± 0.16

0.82 ± 0.13

0.79 ± 0.14

0.82 ± 0.14

0.82 ± 0.12

medium

0.93 ± 0.15

0.79 ± 0.13

0.76 ± 0.12

0.76 ± 0.12

0.78 ± 0.11

0.91 ± 0.14

0.77 ± 0.12

0.75 ± 0.11

0.75 ± 0.12

0.76 ± 0.12

short

0.92 ± 0.14

0.76 ± 0.13

0.74 ± 0.11

0.75 ± 0.12

0.75 ± 0.11

0.87 ± 0.13

0.73 ± 0.13

0.71 ± 0.11

0.73 ± 0.11

0.74 ± 0.12