The 3D ACT Lotus Augment, a highly porous prothesis, is used to reconstruct ischial support defects. It is anatomically designed, with different diameters and lengths. In case of ischial osteolysis and the ischium ramus lack of support for the acetabular cup, the 3D ACT Lotus Augment can be used to fix ischium ramus to provide the inferior support of acetabular cup.