Allograft reconstruction for extensor mechanism rupture after total knee arthroplasty: 4.8-year follow-up.

Three patients who experienced extensor mechanism rupture after total knee arthroplasty underwent reconstruction using an allograft consisting of quadriceps tendon, patella, patellar tendon, and tibial tubercle. All patients who failed initial attempts to repair the extensor mechanism disruption achieved pain relief at average 4.8-year follow-up.