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Salter’s criteria for AVN [25]
| Grade | Description |
|---|---|
| 1 | Absence of the ossific nucleus within 1 year of procedure |
| 2 | Absence of growth in the ossific nucleus within 1 year of procedure |
| 3 | Broadening of the femoral neck/metaphysis within 1 year of procedure |
| 4 | Fragmentation or sclerosis of the femoral head |
| 5 | Residual femoral head or neck deformity, including coax magna, vara, valga, or plana |
AVN = avascular necrosis.
