Table 3.
Reason for revision
| Group | Implant design | Reason for revision (number of implants)* | ||||||
|---|---|---|---|---|---|---|---|---|
| Infection | Loosening | Instability | Fracture | Patellar problems | Other | Unknown | ||
| Conforming | CCK Insall/Burstein® II | 11 (48%) | 1 (4%) | 1 (4%) | 1 (4%) | 1 (4%) | 5 (22%) | 3 (13%) |
| PS Insall/Burstein® II | 6 (40%) | 1 (7%) | 1 (7%) | 0 (0%) | 0 (0%) | 3 (20%) | 4 (27%) | |
| Less conforming | MG® II | 8 (26%) | 2 (6%) | 4 (13%) | 3 (10%) | 7 (23%) | 3 (10%) | 4 (13%) |
* Excluding patellar problems, a known issue with the MG II® system, the components in the conforming and less conforming groups were removed for similar (p = 0.25) reasons; PS = posterior-stabilized; CCK = constrained condylar knee.