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Table 1 Comparison between the stiffness of the osteosyntheses with the 2C classical configuration (2C) and the 2C configuration with end caps (2CEC). Lower changes in shifting tests = higher stiffness

From: Improving stability of elastic stable intramedullary nailing in a transverse midshaft femur fracture model: biomechanical analysis of using end caps or a third nail

 

2C classical (2C)

2C with end caps (2CEC)

P value

 

(n = 8)

(n = 7)

 

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

   

Anterior-posterior

0.52 (0.49)

0.44 (0.11)

0.04a

Posterior-anterior

0.43 (0.11)

0.48 (0.13)

0.89

Lateral-medial

0.70 (0.16)

0.60 (0.19)

0.04a

Medial-lateral

0.76 (0.27)

0.73 (0.25)

0.57

Mean (SD) rotation (Nm/°)

   

External rotation

0.12 (0.04)

0.10 (0.03)

0.15

Internal rotation

0.11 (0.03)

0.10 (0.03)

0.09

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

   

Shifting 9° trochanter major

0.80 (0.65)

1.77 (1.70)

0.06

Shifting 9° crista intertrochanterica

4.56 (2.67)

7.44 (2.48)

0.01a

  1. aAdjusting the results with the Holm-Bonferroni method, the significance of the differences could not be confirmed