312 Is the Use of New Ceramic Heads with Titanium Sleeves on Retained Femoral Stems in Revision Total Hip Arthroplasty Associated with Femoral Head or Neck Junction Failure at Midterm Follow-up?

538 First Revision Total Hip Arthroplasty for Instability: 10-Year Outcomes and Risk Factors Associated for Re-Revision

622 Nickel Free Hypoallergenic versus Standard Cobalt-Chrome Containing Total Knee Replacement: Is there a Difference in Synovial Metal Ions at Minimum 2-Year Follow-up?

e0139 Repeat Two-Stage Revision Arthroplasty for Periprosthetic Joint Infection of the Hip: A Multicentre Study

e0246 High Failure Rates Following Repeat Two-Stage Revision for Chronic Knee Periprosthetic Joint Infection at Long-Term Follow-Up: A Multicentre Study