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Francesco Benazzo Sezione di Chirurgia Protesica ad Indirizzo Robotico – Unità di Traumatologia dello Sport, U.O Ortopedia e Traumatologia Fondazione Poliambulanza, Brescia, Lombardy, Italy
Università degli Studi di Pavia, Pavia, Lombardy, Italy

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Loris Perticarini Sezione di Chirurgia Protesica ad Indirizzo Robotico – Unità di Traumatologia dello Sport, U.O Ortopedia e Traumatologia Fondazione Poliambulanza, Brescia, Lombardy, Italy

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Eugenio Jannelli Clinica Ortopedica e Traumatologia, Fondazione IRCCS Policlinico San Matteo – Pavia, Lombardy, Italy

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Alessandro Ivone Clinica Ortopedica e Traumatologia, Fondazione IRCCS Policlinico San Matteo – Pavia, Lombardy, Italy

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Matteo Ghiara Clinica Ortopedica e Traumatologia, Fondazione IRCCS Policlinico San Matteo – Pavia, Lombardy, Italy

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Stefano Marco Paolo Rossi Sezione di Chirurgia Protesica ad Indirizzo Robotico – Unità di Traumatologia dello Sport, U.O Ortopedia e Traumatologia Fondazione Poliambulanza, Brescia, Lombardy, Italy

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Introduction The variability in the decision about whether to resurface the patella in total knee replacement (TKR) is influenced by different factors including geographic location, training of surgeons, implant design and level of constraint

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Kara McConaghy Case Western Reserve University School of Medicine, Cleveland, Ohio, USA

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Tabitha Derr Implant Research Core, School of Biomedical Engineering, Science, and Health Systems, Drexel University, Philadelphia, Pennsylvania, USA

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Robert M. Molloy Cleveland Clinic, Department of Orthopedic Surgery, Cleveland, Ohio, USA

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Alison K. Klika Cleveland Clinic, Department of Orthopedic Surgery, Cleveland, Ohio, USA

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Steven Kurtz Implant Research Core, School of Biomedical Engineering, Science, and Health Systems, Drexel University, Philadelphia, Pennsylvania, USA
Exponent, Philadelphia, Pennsylvania, USA

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Nicolas S. Piuzzi Cleveland Clinic, Department of Orthopedic Surgery, Cleveland, Ohio, USA

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The management of the patella during total knee arthroplasty (TKA) has been a matter of considerable debate in the orthopaedic community. 1 – 4 Surgeons tend to approach the patella with one of three general mindsets: always resurface the patella

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Feng Xie The Third Affiliated Hospital of Chongqing Medical University, Chongqing, China

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Shuya Sheng Leeds Institute of Rheumatic and Musculoskeletal Medicine (LIRMM), University of Leeds, Leeds, UK

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Jeya Palan Leeds Institute of Rheumatic and Musculoskeletal Medicine (LIRMM), University of Leeds, Leeds, UK

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Hemant G Pandit Leeds Institute of Rheumatic and Musculoskeletal Medicine (LIRMM), University of Leeds, Leeds, UK

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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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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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loosening than the first-generation MoM-THR and thus became the preferred bearing over MoM. 1 - 4 Around the turn of the millennium, a second generation of MoM-THR, including resurfacings, was introduced with the claim of reduced wear and superior

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Gautier Beckers Department of Surgery, Hospital Maisonneuve-Rosemont, Montreal University, Montreal, Quebec, Canada
Personalized Arthroplasty Society, Atlanta, Georgia, USA

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Marc-Olivier Kiss Department of Surgery, Hospital Maisonneuve-Rosemont, Montreal University, Montreal, Quebec, Canada
Personalized Arthroplasty Society, Atlanta, Georgia, USA
Clinique Orthopédique Duval, Laval, Quebec, Canada

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Vincent Massé Department of Surgery, Hospital Maisonneuve-Rosemont, Montreal University, Montreal, Quebec, Canada
Personalized Arthroplasty Society, Atlanta, Georgia, USA
Clinique Orthopédique Duval, Laval, Quebec, Canada

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Michele Malavolta Personalized Arthroplasty Society, Atlanta, Georgia, USA
Department of Knee Surgery, Casa di Cura Solatrix, Rovereto, TN, Italy

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Pascal-André Vendittoli Department of Surgery, Hospital Maisonneuve-Rosemont, Montreal University, Montreal, Quebec, Canada
Personalized Arthroplasty Society, Atlanta, Georgia, USA
Clinique Orthopédique Duval, Laval, Quebec, Canada

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reproduce the pre-arthritic knee anatomy by resurfacing the knee joint (resecting bone and cartilage thickness to match that of the implant) ( 11 ). Compared to systematic MA, personalized techniques better restore joint surface orientations, native

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Christiaan P. van Lingen Isala Clinics, Department of Orthopaedic Surgery and Traumatology, Zwolle, The Netherlands

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Luigi M. Zagra IRCCS Istituto Ortopedico Galeazzi, Milan, Italy

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Harmen B. Ettema Isala Clinics, Department of Orthopaedic Surgery and Traumatology, Zwolle, The Netherlands

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Cees C. Verheyen Isala Clinics, Department of Orthopaedic Surgery and Traumatology, Zwolle, The Netherlands

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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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Bryant Ho Hinsdale Orthopaedics, Hinsdale, Illinois, USA

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Judith Baumhauer University of Rochester, Department of Orthopaedics, Rochester, New York, USA

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patients with more advanced arthritis, operative management has centred on arthrodesis of the first MTP joint. Multiple joint-sparing procedures such as joint arthroplasty or resurfacing have been described with inconsistent results. Pathophysiology

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Richard N. de Steiger Australian Orthopaedic Association National Joint Replacement Registry, SAHMRI, Adelaide, Australia
School of Public Health, Faculty of Health and Medical Sciences, University of Adelaide, Australia

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Stephen E. Graves School of Public Health, Faculty of Health and Medical Sciences, University of Adelaide, Australia

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significantly higher rate of revision for the ASR Hip Resurfacing System and the following year the ASR XL Acetabular System. 8 The identification of these particular prostheses was associated with a substantial reduction in their use by surgeons and the

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Charles Rivière Clinique du Sport, Bordeaux-Mérignac, France
Personalized Arthroplasty Society, Atlanta, Georgia, USA

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William Jackson Personalized Arthroplasty Society, Atlanta, Georgia, USA
Nuffield Orthopaedic Centre, Headington, Oxford, UK

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Loïc Villet Clinique du Sport, Bordeaux-Mérignac, France
Personalized Arthroplasty Society, Atlanta, Georgia, USA

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Sivan Sivaloganathan Personalized Arthroplasty Society, Atlanta, Georgia, USA
South-West London Elective Orthopaedic Centre, Epsom, UK

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Yaron Barziv Personalized Arthroplasty Society, Atlanta, Georgia, USA
Shamir Medical Center, Zriffin, Israel

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Pascal-André Vendittoli Personalized Arthroplasty Society, Atlanta, Georgia, USA
Département de Chirurgie, Université de Montréal, Hôpital Maisonneuve-Rosemont, Montréal, Québec, Canada

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Introduction The Kinematic Alignment (KA) technique for total knee arthroplasty (TKA) is an alternative surgical technique aiming to resurface knee articular surfaces. 1 , 2 Ultimately, the goal of KA is to alter the knee physiological

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Markus Walther Schön Klinik München Harlaching – FIFA Medical Centre of Excellence, Harlachinger Straße, Munich, Germany
Ludwig Maximilian University Munich, Klinik für Orthopädie und Unfallchirurgie, Muskuloskelettales Zentrum München (MUM), Marchionostraße, Munich, Germany
Justus Maximilian University Wuerzburg, König-Ludwig-Haus, Brettreichstraße, Würzburg, Germany
Paracelsus Medizinische Privatuniversität, Strubergasse, Salzburg, Austria
Working Group Clinical Tissue Regeneration of the German Society of Orthopaedics and Traumatology (DGOU), Berlin, Germany

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Oliver Gottschalk Schön Klinik München Harlaching – FIFA Medical Centre of Excellence, Harlachinger Straße, Munich, Germany
Ludwig Maximilian University Munich, Klinik für Orthopädie und Unfallchirurgie, Muskuloskelettales Zentrum München (MUM), Marchionostraße, Munich, Germany
Working Group Clinical Tissue Regeneration of the German Society of Orthopaedics and Traumatology (DGOU), Berlin, Germany

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Matthias Aurich Working Group Clinical Tissue Regeneration of the German Society of Orthopaedics and Traumatology (DGOU), Berlin, Germany
Martin-Luther-University Halle-Wittenberg, Universitätsklinikum Halle (Saale), DOUW - Abteilung für Unfall- und Wiederherstellungschirurgie, Ernst-Grube-Straße, Halle, Germany
BG-Klinikum Bergmannstrost Halle, Halle, Saale, Germany

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( 127 ) and reported that the AOFAS score improved from 55.92 ± 9.52 to 74.67 ± 13.1 while the VAS decreased from moderate-to-mild pain. Based on these results, the authors concluded that metal resurfacing might be considered a valid option for OLT

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