517 PJI Risk Increases with Successive Aseptic Revision TKAs: 4000 Cases with Long-Term Follow-Up

520 Unexpected Positive Cultures in 183 Aseptic Revision TKA: Low Risk of PJI at Midterm Follow-Up

522 Two-stage Exchange TKAs for PJI After Failed DAIR were Associated with High Reinfection Rate: Long-term Outcomes In 246 Cases

e0029 Outcomes of Underweight Patients Undergoing Primary Total Hip Arthroplasty: A Matched Cohort Study

e0055 Periprosthetic Acetabular Fracture in Over 25,000 Uncemented Acetabular Components: 20-Year Survivorship