Table 3 Comparison of adjacent segments range of motion (ROM) after two-level ACDF using cage plus plate (CP) or zero-profile device (ZP)
ROM (°) | ZP | IM-ZP | CP | IM-CP | ||||
|---|---|---|---|---|---|---|---|---|
C34 | C67 | C34 | C67 | C34 | C67 | C34 | C67 | |
Extension | 6.1 | 5.1 | 6.3 | 5.1 | 6.1 | 5.1 | 6.1 | 5.0 |
Flextion | 5.8 | 4.8 | 6.2 | 5 | 6.3 | 5.2 | 6.3 | 5.2 |
Bending | 5.6 | 4.5 | 5.7 | 4.5 | 6.1 | 4.7 | 6.1 | 4.6 |
Torque | 5.4 | 4.4 | 5.4 | 4.5 | 5.6 | 4.6 | 5.7 | 4.6 |