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Introduction Large-head metal-on-metal (MoM) bearings were re-popularised in the late 1990s with the introduction of modern hip resurfacing (HR), followed shortly afterward by large metal head total hip arthroplasty (THA). The introduction of
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dissatisfaction, and litigation ( 4 ). Hip resurfacing arthroplasty (HRA) is an attractive alternative to standard stemmed THA. HRA are metal-on-metal (MoM) articulations, and various in vitro assessments have confirmed a low wear rate with the use of MoM
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.5% for THA performed. 6 While THA is a successful procedure in most cases, failures are still recorded. Overall, excluding metal-on-metal (MoM) bearings from the analysis, failures due to articulating materials represent around 5% of the total
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neutralise the formation of free radicals responsible for oxidation. 22 Vitamin E can be incorporated either by diffusion, or by blending it into PE before the moulding process. Metal-on-metal bearings With a first implantation in 1938 by Wiles
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a promising survivorship ( 1 ). CoCr alloys have been widely used in metal-on-metal (MoM) hip replacements, femoral component of total knee replacements (TKR) as well as in the ball portion of shoulder replacements. For example, in mid-2000s
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situation – Metal-on-metal bearings Since dislocation was one of the most frequent revision reasons, larger heads were used more frequently, starting around 2004, to reduce the dislocation risk. 6 Since larger heads generate more wear against
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School of Care and Public Health Research Institute (CAPHRI), Faculty of Health, Medicine and Life Sciences, Maastricht University, Maastricht, the Netherlands
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cobalt concentrations are often seen after implantation of metal-on-metal (MoM) hip bearings ( 7 ). This can be due to the release of ions from the metal (cobalt–chromium) surface either directly (corrosion) or during sliding under load, which may create
Region Västra Götaland, Sahlgrenska University Hospital, Department of Orthopaedics, Gothenburg, Sweden
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Department of Orthopaedic Surgery and Traumatology, Odense University Hospital, Odense, Denmark
Institute of Clinical Research, University of Southern Denmark, Odense, Denmark
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Region Västra Götaland, Sahlgrenska University Hospital, Department of Orthopaedics, Gothenburg, Sweden
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standard in many countries. 4 Introduction of metal-on-metal articulations, ceramic-on-ceramic and, above all later on, highly cross-linked polyethylene opened the possibility for the use of bigger head sizes, but recent studies have suggested limited
Department of Orthopaedics, Institute of Clinical Sciences, Sahlgrenska Academy, University of Gothenburg, Sweden
Swedish Hip Arthroplasty Register, Gothenburg, Sweden
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Department of Orthopaedics, Institute of Clinical Sciences, Sahlgrenska Academy, University of Gothenburg, Sweden
Swedish Hip Arthroplasty Register, Gothenburg, Sweden
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Swedish Hip Arthroplasty Register, Gothenburg, Sweden
Department of Orthopaedics, Prince Philip Hospital, HDUHB, Wales
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Finnish Arthroplasty Register, Helsinki, Finland
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Department of Orthopaedics, Institute of Clinical Sciences, Sahlgrenska Academy, University of Gothenburg, Sweden
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Department of Orthopaedics, Institute of Clinical Sciences, Sahlgrenska Academy, University of Gothenburg, Sweden
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groin pain. We excluded hip arthroplasties with metal-on-metal (MoM) bearings due to a limited number of MoMs being used lately ( Fig. 2 ). We also excluded dual mobility acetabular components since this bearing concept is predominantly used in patients
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, raised serum metal ion levels, magnetic resonance imaging (MRI), and ultimately intraoperative and histological findings. ARMD was first noted in metal-on-metal (MoM) THR, occurring between bearing surfaces and also as a result of fretting corrosion at
