Figures & data
Figure 1. Pre-revision radiograph. An unexplained “hallo formation” can be seen surrounding the acetabular components.
Figure 2. Skin pigmentation immediately after revision.
Figure 3. Intraoperative findings. Extensive periprosthetic metallosis and wear of the tantalum augment and the adjacent porous titanium and hydroxyapatite-coated acetabular SYMBIOS cup. Ta particles were embedded in the polyethylene surface (black stains).
Figure 4. SEM image and results of EDX analysis of areas A, B, C, and D revealing the predominance of Ta.
Figure 5. 6 months after re-revision of the acetabular components. A modified jumbo Ta cup-Ti cage construct and peripheral Ta augment were used due to pelvic discontinuity. The patient had no pain at the latest follow-up.
