Table 1 Radiographic quality criteria
| 1. Strict lateral X ray (posterior intercondylar distance < 5 mm) | |
| 2. knee joint flexion angle within ±5° | |
| 3. incident ray at the height of the joint space linking the two tibial plateau | |
| 4. x ray radiographically clear | |
| 5. well adapted piston position (behind the proximal metaphysis of the tibia) |