Table 4 Details of mechanical failures
Mechanical failure | PD group (N of patients) | Non-PD group (N of patients) |
|---|---|---|
Overall [incidence] | 7 [26.9%] | 53 [17.9%] |
Pedicle/vertebral screw pull-out | 4 | 24 |
Intervertebral cage migration | 0 | 9 |
Uppermost vertebral fracture | 2 | 11 |
Lowermost vertebral fracture | 1 | 4 |
Hook dislodgement | 0 | 3 |
Rod fracture | 0 | 2 |