Table 1 Values of Eq. 12 for different physiological intermetatarsal angles α

12

4

E = 0.07 × L − 3.5 mm

14

6

E = 0.11 × L − 3.5 mm

16

8

E = 0.14 × L − 3.5 mm

18

10

E = 0.18 × L − 3.5 mm

20

12

E = 0.21 × L − 3.5 mm