Incidences of adjacent segment degeneration and reoperations due to adjacent segment degeneration in the three groups.
| Maintained Group | Restored Group | Kyphotic Group | |
|---|---|---|---|
| Adjacent segment degeneration, n (%) | 10 (16%) | 2 (12%) | 7 (30%) |
| Reoperation due to adjacent segment degeneration, n (%) | 0 | 0 | 1 (4%) |