The projected economic burden and complications of revision hip and knee arthroplasties: Insights from national registry studies

The rising volume of primary hip and knee arthroplasties has led to a parallel increase in revision surgeries, creating significant clinical and economic challenges for healthcare systems worldwide. This study synthesizes national arthroplasty registry data to evaluate trends in revision aetiology, associated costs and regional disparities. While advancements in prosthetic design have reduced aseptic loosening rates (declining to 35.1% for hips and 18.3% for knees), septic complications now account for a growing proportion of revision cases, rising to 18.2% for hips and 21.6% for knees. Additionally, instability and malalignment persist at 15.9% and 14.1%, respectively. Revision procedures are 76% more costly than primary surgeries, with two-stage septic revisions incurring costs of up to $37,297 per case. Beyond direct surgical costs, prolonged recovery and productivity loss contribute to a broader economic impact. Regional variations, such as higher periprosthetic fracture rates in England and Wales, highlight inconsistencies in data reporting and healthcare practices. Addressing these challenges requires standardized infection definitions, enhanced registry collaboration and investment in infection prevention strategies. The role of referral centres in improving outcomes and reducing costs through multidisciplinary care is increasingly recognized. By integrating evidence-based infection management protocols and leveraging emerging technologies, the orthopaedic community can optimize patient outcomes and reduce the financial burden of revising arthroplasties. LEVEL OF EVIDENCE: Level IV.