ArticleInternational orthopaedics2026
Long-term results of a vitamin E-blended polyethylene liner in total hip arthroplasty: a minimum ten year computer aided design based evaluation of wear and component positioning.
Article in International orthopaedics, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
backgroundAseptic loosening remains a leading cause of revision in total hip arthroplasty (THA), with polyethylene wear representing a key contributing factor. Vitamin E-blended highly cross-linked polyethylene (VEPE) has been introduced to improve oxidative stability and long-term wear performance; however, long-term clinical data remain limited.
methodsThis retrospective study evaluates long-term polyethylene wear and component positioning in a cohort of patients who underwent primary THA using a vitamin E-blended polyethylene monoblock acetabular component (RM Pressfit vitamys®). Patients were followed for a minimum of ten years. Radiographic assessment was performed using a fully automated, observer-independent CAD-based software (RayMatch®), enabling measurement of cup inclination, anteversion, and polyethylene wear through 2D-3D registration of implant CAD models.
resultsA total of 57 hips with complete radiographic follow-up were analyzed. Mean polyethylene wear rates were 26.9 µm/year at five years and 18.2 µm/year at ten years, remaining well below commonly reported thresholds associated with osteolysis. Cup inclination remained stable over time, whereas a gradual increase in measured anteversion was observed during follow-up.
conclusionAt a minimum ten year follow-up, the investigated vitamin E-blended polyethylene monoblock cup demonstrated favorable long-term wear characteristics and stable component positioning. Further comparative studies are warranted to compare its long-term performance with other acetabular cup and liner designs.
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