Vitamin E-stabilized polyethylene shows similar survival rates at minimum 7-year follow-up compared to conventional polyethylene in primary total knee arthroplasty.

The aim of this cross-sectional study was to compare survival, clinical and radiographic results of total knee arthroplasty (TKA) with vitamin E-stabilized polyethylene (VEPE) or conventional polyethylene (CPE) at a minimum of 7-year follow-up. Patients who underwent primary TKA between 2011 and 2015, receiving the same cemented rotating platform knee design with VEPE or CPE tibial inserts, were identified. Patients were contacted for clinical and radiographic follow-up. American Knee Society Score (KSS), Forgotten Joint Score (FJS-12), presence of periprosthetic radiolucent lines (RLLs) and osteolysis were evaluated at the last follow-up. Any revision, reintervention or other complications were recorded. Among 350 TKAs initially identified, 102 VEPE and 97 CPE knees were included for analysis with mean follow-up of 8.5 and 8.3 years, respectively. No significant difference was found in survival rates at 10-year follow-up with revision due to aseptic loosening (95.0% vs. 97.8%, TKA with VEPE and CPE tibial inserts showed comparable survival rates, complications and clinical and radiographic results up to 10-year follow-up. Level III.

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© 2024 The Author(s). Journal of Experimental Orthopaedics published by John Wiley & Sons Ltd on behalf of European Society of Sports Traumatology, Knee Surgery and Arthroscopy.

Déclaration de conflit d'intérêts

Lorenzo Banci and Marta Colombo are employed as clinical researchers at Permedica Orthopaedics. Marco Spezia is a paid consultant and received research support from Permedica Orthopaedics. The other authors have no relevant financial or non‐financial interests related to the present study to disclose.