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Juan Carlos Monllau Department of Orthopaedic Surgery, Hospital del Mar, Universitat Autònoma de Barcelona (UAB), Barcelona, Spain
ICATKnee, Institut Catalá de Traumatologia i Medicina de l’Esport (ICATME), Hospital Universitari Dexeus, UAB, Barcelona, Spain

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Simone Perelli Department of Orthopaedic Surgery, Hospital del Mar, Universitat Autònoma de Barcelona (UAB), Barcelona, Spain
ICATKnee, Institut Catalá de Traumatologia i Medicina de l’Esport (ICATME), Hospital Universitari Dexeus, UAB, Barcelona, Spain

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Giuseppe Gianluca Costa Orthopaedic Surgery Department, Ospedale Umberto I, Enna, Italy

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compared with the uninjured side. Knee extension or flexion deficits represent a contraindication for ACL revision surgery ( 9 ) unless they are the result of a malpositioned graft. Knee hyperextension is a well-recognized risk factor for failure ( 59 , 60

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Kashif Ansari Warren Alpert Medical School of Brown University, Providence, Rhode Island, USA

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Manjot Singh Warren Alpert Medical School of Brown University, Providence, Rhode Island, USA

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Jake R McDermott Warren Alpert Medical School of Brown University, Providence, Rhode Island, USA
SUNY Downstate Medical School, New York City, New York, USA

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Jerzy A Gregorczyk Warren Alpert Medical School of Brown University, Providence, Rhode Island, USA

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Mariah Balmaceno-Criss Warren Alpert Medical School of Brown University, Providence, Rhode Island, USA
Department of Orthopaedic Surgery, Warren Alpert Medical School of Brown University, Providence, Rhode Island, USA

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Mohammad Daher Department of Orthopaedic Surgery, Warren Alpert Medical School of Brown University, Providence, Rhode Island, USA

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Christopher L McDonald Department of Orthopaedic Surgery, Warren Alpert Medical School of Brown University, Providence, Rhode Island, USA

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Bassel G Diebo Department of Orthopaedic Surgery, Warren Alpert Medical School of Brown University, Providence, Rhode Island, USA

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Alan H Daniels Department of Orthopaedic Surgery, Warren Alpert Medical School of Brown University, Providence, Rhode Island, USA

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adulthood, including prevalence, risk factors, presentation, diagnosis, management, and complications, such that clinicians can better understand and treat patients with this condition. Epidemiology Prevalence Scoliosis affects roughly 8% of

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Claus Varnum The Danish Hip Arthroplasty Register
Department of Orthopaedic Surgery, Vejle Hospital, Vejle, Denmark

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Alma Bečić Pedersen Department of Clinical Epidemiology, Aarhus University Hospital, Aarhus, Denmark

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Ola Rolfson The Swedish Hip Arthroplasty Register
Department of Orthopaedics, Institute of Clinical Sciences, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden

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Cecilia Rogmark The Swedish Hip Arthroplasty Register
Lund University, Skåne University Hospital, Department of Orthopedics, Malmö, Sweden

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Ove Furnes The Norwegian Arthroplasty Register, Department of Orthopedic Surgery, Haukeland University Hospital, Bergen, Norway
Department of Clinical Medicine, University of Bergen, Bergen, Norway

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Geir Hallan The Norwegian Arthroplasty Register, Department of Orthopedic Surgery, Haukeland University Hospital, Bergen, Norway
Department of Clinical Medicine, University of Bergen, Bergen, Norway

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Keijo Mäkelä The Finnish Arthroplasty Register
Department of Orthopaedics and Traumatology, Turku University Hospital, Turku, Finland

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Richard de Steiger Australian Orthopaedic Association National Joint Replacement Registry (AOANJRR), Adelaide, Australia
Department of Surgery, Epworth HealthCare, University of Melbourne, Melbourne, Australia

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Martyn Porter The National Joint Registry of England, Wales, Northern Ireland and Isle of Man
Centre for Hip Surgery, Wrightington Hospital, Wrightington, Wigan and Leigh NHS Trust, Lancashire, United Kingdom

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Søren Overgaard The Danish Hip Arthroplasty Register
Orthopaedic Research Unit, Department of Clinical Research, University of Southern Denmark, Odense, Denmark
Department of Orthopaedic Surgery and Traumatology, Odense University Hospital, Odense, Denmark

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Arthroplasty Register (DHR) was established in 1995. 38 , 39 Besides important monitoring in annual reports and specific studies on patient- and implant-related risk factors for adverse outcome, 40 - 42 other adverse outcomes including venous

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Claus Varnum The Danish Hip Arthroplasty Register
Department of Orthopaedic Surgery, Vejle Hospital, Vejle, Denmark

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Alma Bečić Pedersen Department of Clinical Epidemiology, Aarhus University Hospital, Aarhus, Denmark

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Per Hviid Gundtoft Department of Orthopaedic Surgery and Traumatology, Odense University Hospital, Odense, Denmark

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Søren Overgaard The Danish Hip Arthroplasty Register
Department of Orthopaedic Surgery and Traumatology, Odense University Hospital, Odense, Denmark
Orthopaedic Research Unit, Department of Clinical Research, University of Southern Denmark, Odense, Denmark

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population, making it possible to study rare interventions and rare outcomes at low cost and quickly. In addition, observational register studies are suitable for studying non-modifiable risk factors such as underlying hip disease, body mass index (BMI), age

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Bengt Mjöberg Department of Orthopaedics, Lund University, Lund, Sweden

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(RSA) Multiple RSA studies of cemented and uncemented hip prostheses have shown that early prosthetic migration poses a risk of future failure; the larger the early migration, the greater the risk of future failure. 19 – 24 For example, in meta

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Qiushi Bai Department of Orthopaedics, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing, China

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Yuanyi Wang Department of Spinal Surgery, The First Hospital of Jilin University, Changchun, China

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Jiliang Zhai Department of Orthopaedics, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing, China

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Jigong Wu Chinese People’s Liberation Army Strategic Support Force Characteristic Medical Center, Beijing, China

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Yan Zhang Department of Radiology, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing, China

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Yu Zhao Department of Orthopaedics, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing, China

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-thoraco-lumbar tandem spinal stenosis; LSS, lumbar spinal stenosis; N/A; not available; TSS, tandem spinal stenosis; ThSS, thoracic spinal stenosis; TLTSS, thoraco-lumbar tandem spinal stenosis. Aetiology and potential risk factors of TSS TSS has two

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Nicolas Gallusser Department of Orthopaedics and Traumatology, Lausanne University Hospital and University of Lausanne, Lausanne, Switzerland

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Bardia Barimani Division of Orthopedic Surgery, McGill University, Montreal, Canada

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Frédéric Vauclair Department of Orthopaedics and Traumatology, Lausanne University Hospital and University of Lausanne, Lausanne, Switzerland

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higher risk of nonunion for transverse fractures. 11 , 18 , 20 It is unclear at this time what the main factor for these differences is; however, a small area of contact between the fragments could explain the lower union rate seen in transverse

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Giuseppe Toro Department of Medical and Surgical Specialties and Dentistry, University of Campania ‘Luigi Vanvitelli’, Naples, Italy.
Department of Clinical Sciences and Translational Medicine, University of Rome Tor Vergata, Rome, Italy.

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Antimo Moretti Department of Medical and Surgical Specialties and Dentistry, University of Campania ‘Luigi Vanvitelli’, Naples, Italy.

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Marco Paoletta Department of Medical and Surgical Specialties and Dentistry, University of Campania ‘Luigi Vanvitelli’, Naples, Italy.

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Annalisa De Cicco Department of Medical and Surgical Specialties and Dentistry, University of Campania ‘Luigi Vanvitelli’, Naples, Italy.

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Adriano Braile Department of Medical and Surgical Specialties and Dentistry, University of Campania ‘Luigi Vanvitelli’, Naples, Italy.

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Alfredo Schiavone Panni Department of Medical and Surgical Specialties and Dentistry, University of Campania ‘Luigi Vanvitelli’, Naples, Italy.

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especially patients with motor and cognitive impairment are at higher risk of sustaining an NFNF in developed countries. 11 – 15 Communicative impairment is one of the most relevant factors leading to a delay in fracture assessment in this population

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Peter Richard Almeida University of the Witwatersrand, Charlotte Maxeke Johannesburg Academic Hospital, Johannesburg, South Africa

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Lipalo Mokete University of the Witwatersrand, Charlotte Maxeke Johannesburg Academic Hospital, Johannesburg, South Africa

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Nkhodiseni Sikhauli University of the Witwatersrand, Charlotte Maxeke Johannesburg Academic Hospital, Johannesburg, South Africa

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Ahmad Mota University of the Witwatersrand, Charlotte Maxeke Johannesburg Academic Hospital, Johannesburg, South Africa

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Bayanda Ndindwa University of the Witwatersrand, Charlotte Maxeke Johannesburg Academic Hospital, Johannesburg, South Africa

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Jurek R T Pietrzak University of the Witwatersrand, Charlotte Maxeke Johannesburg Academic Hospital, Johannesburg, South Africa

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( 5 ). This has necessitated an increased effort to prevent post-operative complications by identifying and addressing pre-operative modifiable risk factors ( 5 , 6 , 7 ). There has been a significant increase in publications regarding malnutrition

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Jonathan M. R. French Bristol Royal Infirmary, University Hospitals Bristol NHS Trust, Bristol, UK

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Paul Bramley Sheffield Teaching Hospitals NHS Foundation Trust, Sheffield, UK

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Sean Scattergood Bristol Royal Infirmary, University Hospitals Bristol NHS Trust, Bristol, UK

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Nemandra A. Sandiford Southland Teaching Hospital, Invercargill, New Zealand

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likely contributing factor. However, study quality is low and results are open to confounding, particularly from trunnion corrosion. Pending further work, if using MDM constructs, surgeons should carefully weigh the possibility of increased risk of ARMD

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