Unicompartmental Knee Arthroplasty: The Past, Current Controversies, and Future Perspectives.

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Abstract

[Indexed for MEDLINE] Conflict of interest statement: None. 2. J Am Acad Orthop Surg. 2023 Oct 1;31(19):1009-1017. doi: 10.5435/JAAOS-D-23-00022. Epub 2023 Jun 26. Patellofemoral Arthroplasty. Ennis HE(1), Phillips JLH, Jennings JM, Dennis DA. Author information: (1)From the Colorado Joint Replacement (Ennis, Phillips, Jennings, and Dennis), Department of Mechanical and Materials Engineering, University of Denver (Jennings, and Dennis), Department of Orthopaedics, University of Colorado School of Medicine, Denver, CO (Dennis), and Department of Biomedical Engineering, University of Tennessee, Knoxville, TN (Dennis). Patellofemoral arthroplasty (PFA) as a treatment option for isolated patellofemoral disease continues to evolve. Enhancement in patient selection, surgical technique, implant design, and technology has led to improved short-term and midterm outcomes. Furthermore, in the setting of a younger patient with isolated patellofemoral arthritis, PFA represents an option for improved function with faster recovery times, bone preservation, maintenance of ligamentous proprioception, and the ability to delay total knee arthroplasty (TKA). The most common reason for revising PFA to a TKA is progression of tibiofemoral arthritis. In general, conversion of PFA to TKA leads to successful outcomes with minimal bone loss and the ability to use primary TKA implants and instrumentation. PFA seems to be a cost-effective alternative to TKA in appropriately selected patients with 5-, 10-PFA survivorships of 91.7% and 83.3%, respectively, and an annual revision rate of 2.18%; however, more long-term clinical studies are needed to determine how new designs and technologies affect patient outcomes and implant performance. Copyright © 2023 by the American Academy of Orthopaedic Surgeons. DOI: 10.5435/JAAOS-D-23-00022