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Frequency of the radiological failure mechanisms in patients with symptomatic failures
| Failure mechanism | No. of patients |
|---|---|
| Screw ploughing | 2 |
| Screw loosening | 0 |
| Screw pull-out | 5 |
| Screw cut-out | 3 |
| Screw breakage | 0 |
| Cage subsidence | 3 |
| Cage displacement | 0 |
| Cage breakage | 0 |
| Rod breakage | 0 |
| Angular deformity | 5 |
| Increase in kyphosis | 3 |
| Decrease lordosis | 2 |
| Peri-construct disease progression | 5 |
| Total | 23 |
