Figure 3.

(A) Preoperative antero-posterior radiograph of the pelvis, showing adequately aligned, well-fixed components, no signs of wear or loosening, but evident “bubble sign” (deposited metallic debris outlining the joint space, creating bubble-like hyperdensities). (B) Follow-up antero-posterior radiograph of the pelvis at 7 months postoperatively showing good implant alignment and no sign of loosening or metallosis. (C) Antero-posterior radiograph of the pelvis at 31 months postoperatively showing stable components and no signs of osteolysis, loosening, or metallosis.