Table 2.
Revision causes and treatments with the minimally invasive iFuse SI Joint Fusion System® (SI-BONE, Inc., San Jose, CA, USA)
| Revision cause and treatment | All revisions (n = 96) |
|---|---|
| Early (n, %) | 56 (58) |
| Malposition, symptomatic | 46 (48) |
| Nerve impingement | 19 |
| Piriformis syndrome | 17 |
| Local soft tissue pain | 13 |
| Malposition, asymptomatic | 10 (10) |
| Nerve impingement | 9 |
| Piriformis syndrome | 2 |
| Local soft tissue pain | 1 |
| Late (n, %) | 40 (42) |
| Symptom recurrence | 34 (35) |
| Revision details | |
| Explant only | 15 |
| Additional implant only | 13 |
| Unknown | 6 |
| Device adjustment only | 3 |
| Explant and reimplant | 3 |
| Supplemental fixation | |
| Lateral screws | 15 |
| None | 14 |
| Posterior fixation | 3 |
| Anterior fixation | 2 |
| Supplemental bone grafting | |
| Local lateral | 17 |
| None | 9 |
| Open posterior | 6 |
| Open anterior | 2 |
| Other (n, %) | 6 (6) |
| Explant only | 3 |
| Explant and reimplant | 1 |
| Device adjustment only | 1 |
| Additional implant only | 1 |
| Unknown | 1 |
Note: Sum of subgroups may be greater than the total due to multiple events in the same patient.