Table 1 Outcome measures evaluated after 4000, 5000, 6000, and 7000 cycles, presented for each treatment group in terms of mean and SD together with p-values from the statistical evaluation over cycles and among the groups

Total Displacement (mm)

CCH

1.63 (1.03)

2.30 (1.19)

2.79 (1.20)

3.90 (1.15)

0.200

PT

1.55 (1.11)

2.31 (1.18)

2.96 (1.50)

4.00 (1.83)

FT

2.13 (1.44)

2.84 (1.77)

4.44 (0.98)

6.75 (0.44)

p-value over cycles

CCH: p < 0.001; PT: p = 0.011; FT: p < 0.001

-

Gap Angle (°)

CCH

1.29 (0.76)

1.79 (0.77)

2.07 (0.79)

2.43 (0.86)

-

0.673

0.047

PT

0.86 (0.57)

1.07 (0.70)

1.34 (0.82)

1.64 (0.97)

0.673

-

0.006

FT

1.75 (0.76)

2.30 (1.00)

3.58 (0.54)

6.24 (2.58)

0.047

0.006

-

p-value over cycles

CCH: p = 0.004; PT: p = 0.017; FT: p = 0.047

-

Screw Tilt Ilium (°)

CCH

1.66 (1.04)

2.35 (1.16)

2.89 (1.18)

3.52 (1.20)

-

 > 0.999

0.118

PT

1.36 (0.64)

1.90 (0.73)

2.45 (0.86)

2.92 (1.02)

> 0.999

-

0.038

FT

2.31 (1.20)

3.12 (1.57)

4.65 (0.84)

6.86 (1.46)

0.118

0.038

-

p-value over cycles

CCH: p < 0.001; PT: p = 0.001; FT: p < 0.001

-

Screw Tip Cutout (mm)

CCH

0.22 (0.21)

0.26 (0.17)

0.43 (0.23)

0.56 (0.36)

0.321

PT

0.20 (0.07)

0.29 (0.16)

0.43 (0.37)

0.66 (0.40)

FT

0.46 (0.13)

0.46 (0.25)

0.65 (0.30)

0.76 (0.41)

p-value over cycles

CCH: p = 0.072; PT: p = 0.024; FT: p = 0.135

-