Reintervention after Mobile-bearing Oxford Unicompartmental Knee Arthroplasty

Marcia Clark, David Campbell, Gregory Kiss, Peter Dobson, Peter Lewis

    Research output: Contribution to journalArticle

    14 Citations (Scopus)

    Abstract

    Background: Medial compartment osteoarthritis is a common disorder that often is treated by unicompartmental knee arthroplasty (UKA). Although the Oxford 3 prosthesis is commonly used based on revision rate and cumulative survival, our experience suggests that although there may be adequate implant survival rates, we observed a worrisome and undisclosed reintervention rate of nonrevision procedures. Purpose: We describe the frequency and cause of repeat intervention subsequent to implanting this device. Methods: Between 1998 and 2005, 398 patients underwent UKA using the Oxford 3 prosthesis. The minimum followup was 12 months (mean, 43 months; range, 12-102 months). Results: Forty of the 398 (10%) patients had 55 (13.8%) repeat anesthetics (reintervention). There were 38 nonrevision reinterventions. Revision was performed in 15 patients (3.8%), but two patients had a second revision (17 revisions or 4.3%). We revised the UKA to a second UKA in seven of the 15 cases but two subsequently were rerevised to a TKA; eight were revised directly to a TKA. Conclusions: Although our data confirm the reported revision rates for this prosthesis, we observed a substantial reintervention rate. Most of the reinterventions are minor and are diagnosed frequently and treated arthroscopically. If revision is required, a second UKA may be considered and performed successfully in patients with isolated loosening of one component. Level of Evidence: Level II, prognostic study. See Guidelines for Authors for a complete description of levels of evidence.

    Original languageEnglish
    Pages (from-to)576-580
    Number of pages5
    JournalClinical Orthopaedics and Related Research
    Volume468
    Issue number2
    DOIs
    Publication statusPublished - Feb 2010

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