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Grading of protrusio acetabuli according to the distance between the acetabular line (medial wall of acetabulum) and the ilio-ischial line25
| Grade | Men | Women |
|---|---|---|
| I |
3-8 mm |
6-11 mm |
| II |
8-13 mm |
12-17 mm |
| III | >13 mm with fragmentation | >17 mm with fragmentation |
