Table 8 Radiography grading (from Dik et al. [9])
Grade | Classification | Bone contour | Subchondral bone texture | Fragment |
|---|---|---|---|---|
0 | Normal | Rounded | Diffuse density | Absent |
1 | Minimal | Smoothly flattened | Obscure lucency | Absent |
2 | Mild | Irregularly flattened | Obvious, ill-bordered local lucency | Absent |
3 | Moderate | Small, rounded/irregular concavity | Obvious, well-bordered local lucency | Small fragment(s) |
4 | Severe | Large, rounded/irregular concavity | Obvious, well-defined extensive lucency | Large fragment(s) |