Motion (°) | Segments | Models | P values | ||||
---|---|---|---|---|---|---|---|
Intact | Arthroplasty | Fusion | Intact vs arthroplasty | Intact vs fusion | Arthroplasty vs fusion | ||
Flexion | |||||||
 | C2/3 | 4.10 ± 0.75 | 4.22 ± 0.88 | 7.67 ± 1.17 | 0.791 | < 0.001 | < 0.001 |
 | C3/4 | 5.22 ± 1.09 | 6.27 ± 0.95 | 0.94 ± 0.14 | 0.075 | < 0.001 | < 0.001 |
 | C4/5 | 5.74 ± 1.08 | 7.03 ± 0.94 | 12.72 ± 1.33 | 0.032 | < 0.001 | < 0.001 |
 | C5/6 | 5.70 ± 1.11 | 7.23 ± 0.88 | 1.08 ± 0.26 | 0.013 | < 0.001 | < 0.001 |
 | C6/7 | 4.39 ± 0.94 | 5.29 ± 0.75 | 8.31 ± 1.07 | 0.067 | < 0.001 | < 0.001 |
Extension | |||||||
 | C2/3 | 3.24 ± 0.79 | 2.88 ± 0.77 | 5.03 ± 1.13 | 0.398 | 0.004 | 0.001 |
 | C3/4 | 4.23 ± 1.03 | 4.79 ± 0.72 | 0.87 ± 0.23 | 0.256 | < 0.001 | < 0.001 |
 | C4/5 | 4.72 ± 0.83 | 5.23 ± 1.06 | 10.45 ± 1.60 | 0.338 | < 0.001 | < 0.001 |
 | C5/6 | 4.65 ± 1.01 | 4.74 ± 1.09 | 0.77 ± 0.18 | 0.866 | < 0.001 | < 0.001 |
 | C6/7 | 4.04 ± 1.03 | 3.83 ± 0.88 | 5.88 ± 1.11 | 0.688 | 0.006 | 0.002 |
Lateral bending | |||||||
 | C2/3 | 5.15 ± 0.85 | 2.71 ± 0.69 | 5.75 ± 1.10 | < 0.001 | 0.277 | < 0.001 |
 | C3/4 | 4.84 ± 1.15 | 5.16 ± 0.94 | 0.86 ± 0.11 | 0.582 | < 0.001 | < 0.001 |
 | C4/5 | 4.73 ± 1.29 | 6.31 ± 1.00 | 10.99 ± 1.38 | 0.971 | < 0.001 | < 0.001 |
 | C5/6 | 3.42 ± 0.77 | 4.70 ± 0.95 | 0.66 ± 0.08 | 0.014 | < 0.001 | < 0.001 |
 | C6/7 | 2.63 ± 0.58 | 2.58 ± 0.74 | 4.33 ± 0.93 | 0.902 | 0.002 | 0.002 |
Axial rotation | |||||||
 | C2/3 | 2.20 ± 0.83 | 2.01 ± 0.34 | 4.19 ± 0.38 | 0.574 | < 0.001 | < 0.001 |
 | C3/4 | 2.97 ± 0.79 | 3.18 ± 0.48 | 1.03 ± 0.45 | 0.562 | < 0.001 | < 0.001 |
 | C4/5 | 3.73 ± 0.67 | 3.99 ± 0.43 | 5.45 ± 0.57 | 0.407 | < 0.001 | < 0.001 |
 | C5/6 | 3.14 ± 0.62 | 3.71 ± 0.43 | 0.96 ± 0.40 | 0.065 | < 0.001 | < 0.001 |
 | C6/7 | 2.20 ± 0.93 | 1.95 ± 0.45 | 3.34 ± 0.63 | 0.532 | 0.019 | 0.002 |