The Complications and Modes of Failure of Partial Knee Arthroplasty
Despite the excellent success rates of the modern unicompartmental knee arthroplasty (UKA), results of knee replacement registries still show a relatively high revision and failure rate for UKA. Degeneration of the unreplaced compartments and septic complications have both been reported in mobile and fixed designs. Bearing dislocation continues to be the predominant mechanism of failure in mobile UKAs, whereas polyethylene wear and aseptic loosening remain the main causes of failure in fixed UKAs. With the extensive use of contemporary designs of both mobile- and fixed-bearing UKAs, these complications will likely decrease due to the implementation of cross-linked polyethylene-bearing surfaces and improved physiologic implant kinematics.
KeywordsUnicompartmental knee arthroplasty Complications Periprosthetic joint infection