Table 2.
Adverse events for the closing- and opening-wedge group
| Number of events, n (%) | ||
|---|---|---|
| Closing-wedge osteotomy (n = 354) | Opening-wedge osteotomy (n = 112) | |
| Serious adverse events | ||
| Sensory palsy of the CPN | 14 (4.0) | 0 |
| Motor palsy of the CPN | 1 (0.3) | 0 |
| Pseudoarthrosis | 8 (2.3) | 4 (3.6) |
| Wound infection treated with antibiotics | 6 (1.7) | 5 (4.5) |
| Fracture of the tibial plateau | 2 (0.6) | 2 (1.9) |
| Re-HTOa | 7 (2.0) | 3 (2.7) |
| Delayed union | 1 (0.3) | 0 |
| Lesion of the ATA | 1 (0.3) | 0 |
| Malposition of hardware | 1 (0.3) | 0 |
| Deep venous thrombosis | 2 (0.6) | 0 |
| Pulmonary embolus | 0 | 1 (0.9) |
| Infection of the urinary tract | 2 (0.6) | 1 (0.9) |
| Post-surgery diffuse lung emphysema | 1 (0.3) | 0 |
| Compartment syndrome | 1 (0.3) | 1 (0.9) |
| Hardware removalb | 169 (47.7) | 79 (70.5) |
| Adverse events | ||
| Iliac crest pain | 0 | 11 (19.7)c |
| Wound infection without antibiotic treatment | 1 (0.3) | 2 (1.9) |
| CRPS | 1 (0.3) | 1 (0.9) |
One hundred and twenty patients did not return their questionnaire for several reasons; their adverse events were only assessed by medical record screening
CPN common peroneal nerve, ATA anterior tibial artery, CRPS complex regional pain syndrome
aRe-HTO was performed because of overcorrection or undercorrection or loss of correction
bTen hardware removals in the closing-wedge group and two in the opening-wedge group were performed prior to total knee arthroplasty
cFifty-six patients (50 %) of the opening-wedge group underwent spongioplasty with autologous bone harvested at the iliac crest. Of these patients, 11 patients reported pain at the iliac crest for more than 6 weeks