Table 1 Outcome measures of the femoral head movements with respect to the shaft in the two study groups with fractured and osteotomized specimens after 1000, 5000 and 10,000 cycles, in terms of mean and standard deviation, together with p-values from the statistical comparisons between the groups and over cycles

Varus deformation [°]

 Fractured

0.5 ± 0.2

2.4 ± 0.6

8.5 ± 2.7

p = 0.501

 Osteotomized

0.7 ± 0.5

3.0 ± 2.5

10.7 ± 8.3

 p-value over cycles

p < 0.001

Leg shortening [mm]

 Fractured

0.8 ± 0.3

2.5 ± 1.6

5.8 ± 4.5

p = 0.424

 Osteotomized

0.8 ± 0.5

2.6 ± 2.0

15.9 ± 12.4

 p-value over cycles

p = 0.001

Rotation around neck axis [°]

 Fractured

0.4 ± 0.4

1.5 ± 1.4

4.8 ± 3.1

p = 0.093

 Osteotomized

1.9 ± 2.4

5.4 ± 8.3

13.4 ± 15.2

 p-value over cycles

p = 0.011