Fig. 3
From: Method for the location of primary wear scars from retrieved metal on metal hip replacements

Acetabular features. An image of a metal acetabular cup, clearly showing the acetabular features which are circled in red
From: Method for the location of primary wear scars from retrieved metal on metal hip replacements
Acetabular features. An image of a metal acetabular cup, clearly showing the acetabular features which are circled in red