Open Access
Table 1
Etiologies of extensor mechanism failure and indications for RTKA.
| Patient (n°) | Extensor mechanism lesion | TKA issue | Active extension deficit (AED) |
|---|---|---|---|
| 1 | Allografted PT rupture | Tibia aseptic loosening | 0° |
| 2 | Allografted PT rupture | Iterative septic loosening | 0° |
| 3 | PT rupture | Femoropatellar prothesis | 30° |
| 4 | PT rupture | Iterative septic loosening | 0° |
| 5 | Patellectomy | Septic loosening | 60° |
| 6 | PT rupture | Femoral implant malposition | 30° |
| 7 | Patellectomy | Iterative septic loosening | 30° |
| 8 | Allografted AT rupture | Iterative septic loosening | 20° |
| 9 | QT rupture | Aseptic loosening | 30° |
| 10 | QT rupture | Recurvatum | 20° |
| 11 | PT rupture | Septic loosening, TTO | 50° |
| 12 | Patellar disclocation fracture | Iterative septic loosening | Complete AED |
| 13 | PT rupture, ATT fracture, open patellar luxation | Iterative septic loosening | 50° |
| 14 | QT rupture | Iterative aseptic loosening | Complete AED |
| 15 | Patellectomy | Instability | 20° |
| 16 | PT rupture | Instability | 0° |
| 17 | PT rupture | Septic loosening | 40° |
| 18 | ATT fracture | Iterative septic loosening | 0° |
| 19 | PT rupture | Iterative septic loosening | 20° |
| 20 | QT rupture | Iterative aseptic loosening | 0° |
AED: active extension deficit, PT: patellar tendon, QT: quadricipital tendon, ATT: anterior tibial tuberosity, TTO: tibia tubercle osteotomy.
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