Table 1.
Patient demographic data and summary of septic and aseptic failures
| Demographic | Number |
|---|---|
| Number of patients | 239 (253 knees) |
| Man-to-woman ratio | 104:135 |
| Median followup (years) (range) | 4 (1–17) |
| Mean age (years) | 70 ± 10 |
| Mean BMI (kg/m2) | 32 ± 7 |
| Number of repeat one-stage procedures | 17 (7%) |
| Number of patients failing a two-stage revision | 33 (13%) |
| Number of septic failures | 16 (6%) |
| Number of aseptic failures | 17 (7%) |
| Septic failures treated with: | |
| I&D + component retention and polyethylene exchange + suppressive antibiotics | 4 |
| I&D + component retention and polyethylene exchange | 4 |
| Suppressive antibiotics with no surgery | 4 |
| Above knee amputation | 1 |
| Repeat 2SR TKA | 3 |
| Number of repeat two-stage revisions | 11 (in 11 patients) |
| Causes of aseptic failures: | |
| Loosening | 7 |
| Instability | 5 |
| Pain | 2 |
| Extensor mechanism failure | 1 |
| Osteolysis | 1 |
| Nickel allergy | 1 |
I&D = open debridement.