Table 1.
Reasons for revision
| Reason for revision | Number of patients |
|---|---|
| Hip arthroplasties (N = 231) | |
| Aseptic loosening | 83 (36%) |
| Periprosthetic joint infection | 56 (24%) |
| Instability | 39 (17%) |
| Polyethylene wear/osteolysis | 35 (15%) |
| Periprosthetic fracture | 5 (2.2%) |
| Component fracture | 2 (0.9%) |
| Heterotopic ossification | 2 (0.9%) |
| Iliopsoas tendonitis | (0.9%) |
| Liner disassociation | 2 (0.9%) |
| Other | 5 (2.2%) |
| Knee arthroplasties (N = 270)* | |
| Aseptic loosening | 71 (26%) |
| Periprosthetic joint infection | 70 (26%) |
| Instability | 36 (13%) |
| Stiffness | 28 (10%) |
| Failed partial knee arthroplasty | 15 (6%) |
| Polyethylene wear/osteolysis | 13 (4.8%) |
| Extensor mechanism disruption | 10 (3.7%) |
| Patellar maltracking | 6 (2.2%) |
| Component malposition/malrotation | 5 (1.9%) |
| Avascular necrosis of patella | 3 (1.1%) |
| Flexion contracture | 3 (1.1%) |
| Pain | 3 (1.1%) |
| Periprosthetic fracture | 2 (0.7%) |
| Unresurfaced patella | 2 (0.7%) |
| Other | 3 (1.1%) |
* Percentages do not add to 100 as a result of rounding.