Survival analysis of one-stage exchange of infected unicompartmental knee arthroplasty: a single-center study with minimum 3 years follow-up |
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Authors: | Kocao?lu Hakan Hennes Fabian Abdelaziz Hussein Neufeld Michael E Gehrke Thorsten Citak Mustafa |
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Institution: | 1.Department of Orthopaedic Surgery, Helios ENDO-Klinik Hamburg, Holstenstr. 2, 22767, Hamburg, Germany ;2.Department of Orthopaedics and Traumatology, Faculty of Medicine, Ankara University, Ibn-i Sina Hospital Talatpasa Blvd, 06100, Ankara, Turkey ;3.Zentrum für Rehabilitationmedizin/Sportmedizin, BG Klinikum Hamburg, Bergerdorfer Strasse 10, 21033, Hamburg, Germany ;4.Division of Lower Limb Reconstruction, Department of Orthopaedics, University of British Columbia, Vancouver, BC, Canada ; |
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Abstract: | Purpose The rates of unicompartmental knee arthroplasty (UKA) are increasing yet little data exists regarding management of periprosthetic joint infections (PJI) after UKA, particularly utilizing one-stage revision. The aim of this study was to determine the septic and all-cause revision-free survival of UKA PJIs treated with one-stage revision, as well as functional outcomes and risk factors for failure. MethodsA retrospective review of one-stage septic revisions with a hinged or rotating hinged implant between 2000 and 2015 at a single institution was performed. Results of 15 patients with a minimum of 3-year follow-up (mean?=?93 months; range 37–217) were evaluated by means of infection control, survivorship, patient reported functional score and possible causal factors for a re-revision. Kaplan–Meier curves and Cox regression analysis were used. ResultsAfter a mean of 8 years of follow-up infection control rate was 93.3%, the survivorship free of any reoperation, including both septic and aseptic causes, was 80% at 5 years and 64.2% at ten years and average Lysholm score was 72.7?±?21.3 (33–100). ConclusionOne-stage revision for PJI of UKA using a hinged knee design has excellent infection-free survival at mid to long-term follow-up. Likewise, patient reported functional outcomes are promising. However, one-third of patients required aseptic reoperation and aseptic loosening was the dominant etiology. |
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