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  • Title: Knee Arthrodesis Is a Durable Option for the Salvage of Infected Total Knee Arthroplasty.
    Author: Yeung CM, Lichstein PM, Varady NH, Maguire JH, Chen AF, Estok DM.
    Journal: J Arthroplasty; 2020 Nov; 35(11):3261-3268. PubMed ID: 32709562.
    Abstract:
    BACKGROUND: Knee arthrodesis (KA) and above-knee amputation (AKA) have been used for salvage of failed total knee arthroplasty (TKA) after periprosthetic joint infection (PJI). However, few studies have assessed the outcomes of KA after TKA PJI, as it remains an uncommon procedure. We investigated rates of AKA, control of infection, and ambulatory status after KA for TKA PJI treatment. METHODS: This was a retrospective and single-surgeon series of 51 failed TKAs due to PJI treated with two-stage KA between 2000 and 2016 with a minimum of 2-year follow-up. Patient demographics, comorbidities, surgical history, radiographic data, and outcomes of KA treatment were recorded. RESULTS: Infection was successfully controlled in 48 of 51 patients (94.1%); of these, 24 knees (50.0%) required no reoperation subsequent to the index KA, whereas the remaining 24 (50.0%) patients required a median of 1 additional operation. Nonunion, malunion, or delayed union was noted in 10 patients (19.6%). Of the 48 patients who were successfully treated with KA, 41 patients (85.4%) remained ambulatory after KA and 9 of these patients (18.8%) did not require assistive devices. Three of 51 patients (5.9%) progressed to AKA after KA. CONCLUSION: Patients undergoing KA for TKA PJI had high rates of infection control and preservation of ambulatory status, with low rates of progression to AKA in our study. LEVEL OF EVIDENCE: Level IV-case series.
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