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Søren Overgaard Department of Orthopaedic Surgery and Traumatology, Copenhagen University Hospital, Copenhagen, Denmark
Department of Clinical Medicine, Faculty of Health & Medical Sciences, University of Copenhagen, Copenhagen, Denmark

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Thomas M Grupp Aesculap AG Research & Development & Medical Scientific Affairs, Tuttlingen, Germany
Department of Orthopaedic and Trauma Surgery, Ludwig Maximilians University Munich, Musculoskeletal University Center Munich (MUM), Campus Grosshadern, Munich, Germany

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Rob GHH Nelissen Department of Orthopaedics, Leiden University Medical Center, Leiden, the Netherlands
Technical University Delft, Delft, the Netherlands

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Luca Cristofolini Department of Industrial Engineering, School of Engineering and Architecture, Alma Mater Studiorum - Università di Bologna, Bologna, Italy

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Anne Lübbeke Division of Surgery and Traumatology, Geneva University Hospitals and University of Geneva, Switzerland
Nuffield Department of Orthopaedics, Rheumatology and Musculoskeletal Sciences, University of Oxford, UK

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Marcus Jäger Department of Orthopaedics, Trauma & Reconstructive Surgery St. Marien Hospital Mülheim an der Ruhr & Chair of Orthopaedics and Trauma Surgery University of Duisburg–Essen, Essen, Germany

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Matthias Fink TÜV Süd Product Service GmbH, Clinical Centre of Excellence, Munich Germany

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Sabine Rusch Aesculap AG Research & Development & Medical Scientific Affairs, Tuttlingen, Germany

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Hassan Achakri Zimmer Biomet, Clinical, Regulatory & Quality Affairs, Winterthur, Switzerland

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Francesco Benazzo IUSS Pavia, Fondazione Poliambulanza Istituto Ospedaliero, Brescia, Italy

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Dario Bergadano Medacta International SA, Medical Affairs, Castel San Pietro, Switzerland

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Georg N Duda Julius Wolff Institute and Center for Muskuloskeletal Surgery, Berlin Institute of Health at Charité Universitätsmedizin Berlin, Germany

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Christian Kaddick EndoLab Mechanical Engineering GmbH, Riedering, Germany

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Volkmar Jansson Department of Orthopaedic and Trauma Surgery, Ludwig Maximilians University Munich, Musculoskeletal University Center Munich (MUM), Campus Grosshadern, Munich, Germany

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Klaus-Peter Günther University Clinic Carl Gustav Carus, Center for Orthopaedic & Trauma Surgery, Technical University Dresden, Dresden, Germany

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which might not have any direct influence on implant performance/fixation/patient, that is, minor optimisations on given implants. Some examples are an adjusted radius in the locking mechanism between the acetabular cup and insert; a different shape of

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Michael M. Morlock TUHH Hamburg University of Technology, Hamburg, Germany.

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Robert Hube OCM Clinic Munich, Munich, Germany

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Georgi Wassilew Department for Orthopaedics and Orthopaedic Surgery, University of Greifswald, Greifswald, Germany

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Felix Prange TUHH Hamburg University of Technology, Hamburg, Germany.

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Gerd Huber TUHH Hamburg University of Technology, Hamburg, Germany.

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Carsten Perka Center for Musculoskeletal Surgery, Orthopedic Department, Charité – Universitätsmedizin Berlin, Berlin, Germany

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reported for resurfacing 15 , 16 and soon after for large MoM bearings. 17 , 18 In MoM bearings the material loss from the cup bearing surface and the female taper were shown to demonstrate the greatest material loss. 19 Stem taper fracture

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Akintunde George Centre for Integrated Bioprocessing Research, Department of Chemical Engineering, University of Bath, Bath, UK

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Marianne Ellis Centre for Integrated Bioprocessing Research, Department of Chemical Engineering, University of Bath, Bath, UK

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Harinderjit Singh Gill Department of Mechanical Engineering, University of Bath, Bath, UK

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surgery. Despite advances in total hip arthroplasty, failure of acetabular cups in total hip arthroplasty remains a concern and more so when those affected are sickle cell disease patients. Kalia et al noted in their study that osseointegration improved

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Luigi Zagra Hip Department, IRCCS Istituto Ortopedico Galeazzi, Italy

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Enrico Gallazzi Hip Department, IRCCS Istituto Ortopedico Galeazzi, Italy

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- 47 . 23. Affatato S Bordini B Fagnano C . Effects of the sterilisation method on the wear of UHMWPE acetabular cups tested in a hip joint simulator . Biomaterials 2002 ; 23 : 1439 - 1446 . 24. Engh

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Georgios Kyriakopoulos Hôpital de la Tour, Geneve, Switzerland

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Lazaros Poultsides New York University Langone Orthopedic Hospital, New York University School of Medicine, USA

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Panayiotis Christofilopoulos Hôpital de la Tour, Geneve, Switzerland

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. Ease of fluoroscopy use One of the big advantages of the anterior approach is the unencumbered use of intraoperative fluoroscopy. The effect of fluoroscopy in adequate cup positioning has been clearly demonstrated in terms of reducing abduction and

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Xavier du Cluzel de Remaurin Pediatric Orthopaedic Surgery Department, Paris Descartes University, Assistance Publique Hôpitaux de Paris (AP-HP), Necker Hospital, Paris, France
Arts et Métiers Institute of Technology, Université Sorbonne Paris Nord, IBHGC-Institut de Biomécanique Humaine Georges Charpak, HESAM Université, Paris, France

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Nejib Khouri Pediatric Orthopaedic Surgery Department, Paris Descartes University, Assistance Publique Hôpitaux de Paris (AP-HP), Necker Hospital, Paris, France

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Samuel Georges Pediatric Orthopaedic Surgery Department, Paris Descartes University, Assistance Publique Hôpitaux de Paris (AP-HP), Necker Hospital, Paris, France

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Laurent Gajny Arts et Métiers Institute of Technology, Université Sorbonne Paris Nord, IBHGC-Institut de Biomécanique Humaine Georges Charpak, HESAM Université, Paris, France

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Claudio Vergari Arts et Métiers Institute of Technology, Université Sorbonne Paris Nord, IBHGC-Institut de Biomécanique Humaine Georges Charpak, HESAM Université, Paris, France

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Alina Badina Pediatric Orthopaedic Surgery Department, Paris Descartes University, Assistance Publique Hôpitaux de Paris (AP-HP), Necker Hospital, Paris, France

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plane (APP), originally used by Lewinnek ( 45 ) for positioning the acetabular cup in prone total hip arthroplasty, was the most mentioned with 59 studies. The most anterior points of the two anterior superior iliac spines (ASIS) and a point midway

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Bart G. Pijls Department of Orthopaedics, Leiden University Medical Center, Leiden, The Netherlands

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Jennifer M. T. A. Meessen Department of Orthopaedics, Leiden University Medical Center, Leiden, The Netherlands

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Keith Tucker Implant Performance Committee, England and Wales National Joint Registry, ODEP, Beyond Compliance and MHRA Expert Advisory Group for MoM Prostheses, London, UK

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Susanna Stea Istituto Ortopedico Rizzoli, Bologna, Italy

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Liza Steenbergen Dutch Arthroplasty Register (Landelijke Registratie Orthopedische Implantaten, LROI), 's- Hertogenbosch, The Netherlands

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Anne Marie Fenstad The Norwegian Arthroplasty Register, Department of Orthopaedic Surgery, Haukeland University Hospital, Bergen, Norway

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Keijo Mäkelä Department of Orthopedics and Traumatology, Turku University Hospital, Turku, Finland

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Ioan Cristian Stoica Foisor Orthopaedics Clinical Hospital, Bucharest, Romania

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Maxim Goncharov VJRR, Russian Scientific Research Institute of Traumatology and Orthopedics, St Petersburg, Russia

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Søren Overgaard Department of Orthopedic Surgery and Traumatology, Odense University Hospital, Odense, Denmark

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Jorge Arias de la Torre Departament de Salut, Agència de Qualitat i Avaluació Sanitàries de Catalunya (AQuAS), Barcelona, Spain
CIBER Epidemiología y Salud Pública (CIBERESP), Madrid, Spain
Instituto de Biomedicina (IBIOMED). Universidad de León, León, Spain

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Anne Lübbeke Division of Orthopaedic Surgery and Traumatology, Geneva University Hospitals, Geneva, Switzerland
Nuffield Department of Orthopaedics, Rheumatology and Musculoskeletal Sciences, University of Oxford, Oxford, UK

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Ola Rolfson Department of Orthopaedics, Institute of Clinical Sciences, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden

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Rob G. H. H. Nelissen Department of Orthopaedics, Leiden University Medical Center, Leiden, The Netherlands

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cups in stemmed large head MoM implants. Primary revisions Five-year revision rates The resurfacings and stemmed large head MoM implants had higher pooled revision rates at five years than the standard THA ( Fig. 1 ): 6.0%, 95% confidence

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Allan Roy Sekeitto Arthroplasty Unit, Division of Orthopaedic Surgery, Charlotte Maxeke Johannesburg Academic Hospital, University of the Witwatersrand, Johannesburg, South Africa

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Nkhodiseni Sikhauli Arthroplasty Unit, Division of Orthopaedic Surgery, Charlotte Maxeke Johannesburg Academic Hospital, University of the Witwatersrand, Johannesburg, South Africa

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Dick Ronald van der Jagt Arthroplasty Unit, Division of Orthopaedic Surgery, Charlotte Maxeke Johannesburg Academic Hospital, University of the Witwatersrand, Johannesburg, South Africa

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Lipalo Mokete Arthroplasty Unit, Division of Orthopaedic Surgery, Charlotte Maxeke Johannesburg Academic Hospital, University of the Witwatersrand, Johannesburg, South Africa

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Jurek R.T. Pietrzak Arthroplasty Unit, Division of Orthopaedic Surgery, Charlotte Maxeke Johannesburg Academic Hospital, University of the Witwatersrand, Johannesburg, South Africa

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-operative dislocations. 41 The use of DMC (dual mobility cups) has reduced the post-operative dislocation rate 42 in THA for FNFs 41 to 0–4.6%. 13 DMC have a smaller inner femoral head which is in keeping with Charnley’s low-friction arthroplasty

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Holger Keil BG Trauma Center Ludwigshafen, Germany

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Nils Beisemann BG Trauma Center Ludwigshafen, Germany

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Benedict Swartman BG Trauma Center Ludwigshafen, Germany

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Sven Yves Vetter BG Trauma Center Ludwigshafen, Germany

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Paul Alfred Grützner BG Trauma Center Ludwigshafen, Germany

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Jochen Franke BG Trauma Center Ludwigshafen, Germany

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surgical view is present, such as in conventional total hip arthroplasty, intra-operative images are performed to confirm correct alignment and orientation of the implant, especially the acetabular cup, and to rule out accompanying fractures of the

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Giorgio Perino Department of Orthopedics and Orthopedic Surgery, University Medicine Greifswald, Greifswald, Germany

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Ivan De Martino Division of Orthopaedics and Traumatology, Fondazione Policlinico Universitario Agostino Gemelli IRCCS, Rome, Italy

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Lingxin Zhang Department of Pathology and Laboratory Medicine, Sinai Health System, Toronto, Canada

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Zhidao Xia Centre for Nanohealth, Swansea University Medical School, Singleton Park, Swansea, UK

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Jiri Gallo Department of Orthopaedics, Faculty of Medicine and Dentistry, University Hospital, Palacky University Olomouc, Czech Republic

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Shonali Natu Department of Pathology, University Hospital of North Tees and Hartlepool NHS Foundation Trust, Stockton-on-Tees, UK

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David Langton Orthopaedic Department, Freeman Hospital, Newcastle upon Tyne, UK

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Monika Huber Pathologisch-bakteriologisches Institut, Otto Wagner Spital, Wien, Austria

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Anastasia Rakow Department of Orthopedics and Orthopedic Surgery, University Medicine Greifswald, Greifswald, Germany

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Janosch Schoon Department of Orthopedics and Orthopedic Surgery, University Medicine Greifswald, Greifswald, Germany

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Enrique Gomez-Barrena Servicio de Cirugía Ortopédica y Traumatología, Hospital Universitario La Paz-IdiPAZ, Universidad Autónoma de Madrid, Madrid, Spain

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Veit Krenn MVZ-Zentrum für Histologie, Zytologie und Molekulare Diagnostik-GmbH, Trier, Germany

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-particulate (black arrows) conventional metallic debris in a case of MoP THA after 312 months of implantation with impingement of femoral neck/acetabular cup (H&E × 200) with formation of papillary, charcoal grey neo-synovium in inset. (b) Macrophage infiltrate in

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