Table 2 Comparison between the stiffness of the osteosyntheses with the 2C classical configuration (2C) and the configuration with a third nail from lateral (3E). Lower changes in shifting tests = higher stiffness

(n = 8)

(n = 8)

Mean (SD) four-point bending (Nm/mm)

Anterior-posterior

0.52 (0.49)

1.04 (0.37)

<0.001

Posterior-anterior

0.43 (0.11)

0.85 (0.30)

<0.001

Lateral-medial

0.70 (0.16)

1.26 (0.54)

<0.001

Medial-lateral

0.76 (0.27)

1.16 (0.33)

<0.001

Mean (SD) rotation (Nm/°)

External rotation

0.12 (0.04)

0.14 (0.02)

<0.01^a

Internal rotation

0.11 (0.03)

0.16 (0.04)

0.001

Mean (SD) 9° compression/shifting (mm)

Shifting 9° trochanter major

0.80 (0.65)

1.14 (1.41)

0.98

Shifting 9° crista intertrochanterica

4.56 (2.67)

4.97 (2.89)

0.69