Table 2 Median [min; max] local (L3–L5) range of motion (RoM) and neutral zone (NZ) values for each instrumentation step.
From: Load-sharing biomechanics of lumbar fixation and fusion with pedicle subtraction osteotomy
Flexion/extension | Lateral Bending | Axial Torsion | ||||
|---|---|---|---|---|---|---|
RoM (°) | NZ (°) | RoM (°) | NZ (°) | RoM (°) | NZ (°) | |
Intact | 12.0 [9.7; 14.5] | 3.7 [1.9; 5.5] | 12.8 [12.4; 13.6] | 4.4 [3.7; 5.3] | 7.8 [5.4; 8.5] | 0.8 [0.8; 1.8] |
PSO-2 | 0.5 [0.0; 0.6] | 0.0 [− 0.1; 0.1] | − 0.1 [− 0.3; 0.0] | 0.0 [0.0; 0.0] | 1.5 [1.4; 1.7] | 0.1 [0.1; 0.1] |
PSO-2 + Cages | 0.3 [− 0.5; 0.3] | 0.1 [0.1; 0.1] | 0.0 [0.0; 0.0] | 0.0 [0.0; 0.1] | 1.5 [1.5; 1.5] | 0.2 [0.0; 0.2] |
PSO-4 + Cages | 0.2 [− 0.4; 0.4] | − 0.1 [0.0; − 0.1] | 0.0 [0.0; 0.0] | 0.0 [0.0; 0.1] | 1.4 [1.2; 1.4] | 0.1 [0.1; 0.2] |
