201 Unexpected Positive Cultures in 230 Aseptic Revision THAs: High Midterm Survivorship Free of PJI

202 One-Stage Exchange for Early Postoperative Infection after Uncemented THA: Favorable Results at 5 Years

251 Patellar Resurfacing in Primary TKA: Improved 15-Year Outcomes in Over 25,000 Cases

298 Fifty Years of Progress: Trends in Survivorship and Failure Mechanisms in Over 41,000 Primary TKAs

311 Mortality after Revision Total Hip Arthroplasty for Periprosthetic Joint Infection