An acetabular component of a prosthetic hip joint comprising an acetabular cup (842) adapted to be mounted to a native acetabulum； a first acetabular cup insert (851) to be mounted to the acetabular cup and repositionable with respect to the acetabular cup； and, a second acetabular cup insert (844) to be mounted to the first acetabular cup insert and repositionable with respect to the first acetabular cup insert, the first acetabular cup insert interposing the second acetabular cup insert and the acetabular cup.
