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Table 2 Grading of protrusio acetabuli according to the distance between the acetabular line (medial wall of acetabulum) and the ilio-ischial line 25

From: Lower limb joint replacement in rheumatoid arthritis

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