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David T. Wallace Department of Biomedical Engineering, University of Strathclyde, Glasgow, UK
Department of Orthopaedics, Golden Jubilee National Hospital, Clydebank, UK

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Philip E. Riches Department of Biomedical Engineering, University of Strathclyde, Glasgow, UK

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Frédéric Picard Department of Biomedical Engineering, University of Strathclyde, Glasgow, UK
Department of Orthopaedics, Golden Jubilee National Hospital, Clydebank, UK

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Introduction Instability - reported as a feeling of buckling or giving way - is a commonplace symptom in osteoarthritic (OA) knees, being found in up to 72% of individuals. 1 – 5 In an attempt to understand and treat instability, either

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Felix H. Savoie Tulane University, New Orleans, Louisiana, USA

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Michael O’Brien Tulane University, New Orleans, Louisiana, USA

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Introduction Valgus instability of the elbow is common in United States baseball pitchers and is not infrequent in gymnasts, javelin throwers, other overhead athletes and wrestlers. Although trauma more commonly affects the lateral side

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Joaquín Sanchez-Sotelo Mayo Clinic, Rochester, Minnesota, USA

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Mark Morrey Mayo Clinic, Rochester, Minnesota, USA

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Introduction Traumatic elbow injuries commonly result in damage to several of the elbow structures involved in joint stability. Persistent elbow instability after injury often results in pain, poor function and progressive joint degeneration

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Megan Conti Mica University of Chicago, Chicago, Illinois, USA
Department of Orthopedics, AZ Monica, Deurne, Belgium
Department of Orthopedics, AZ Monica, Deurne, and University Hospital Antwerp, Edegem, Belgium

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Pieter Caekebeke University of Chicago, Chicago, Illinois, USA
Department of Orthopedics, AZ Monica, Deurne, Belgium
Department of Orthopedics, AZ Monica, Deurne, and University Hospital Antwerp, Edegem, Belgium

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Roger van Riet University of Chicago, Chicago, Illinois, USA
Department of Orthopedics, AZ Monica, Deurne, Belgium
Department of Orthopedics, AZ Monica, Deurne, and University Hospital Antwerp, Edegem, Belgium

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Introduction Posterolateral rotatory instability (PLRI) was first described by O’Driscoll et al, 1 and while it is relatively uncommon, it is the most common form of chronic elbow instability. The lateral collateral ligament (LCL) complex

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Abdul-ilah Hachem Department of Orthopedic Surgery, Bellvitge University Hospital, L’Hospitalet de Llobregat, Barcelona, Spain

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Andres Molina-Creixell Tecnologico de Monterrey, Escuela de Medicina y Ciencias de la Salud, Monterrey, Mexico

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Xavier Rius Department of Orthopedic Surgery, Bellvitge University Hospital, L’Hospitalet de Llobregat, Barcelona, Spain

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Karla Rodriguez-Bascones Department of Orthopedic Surgery, Asepeyo Hospital, Barcelona, Spain

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Francisco Javier Cabo Cabo Department of Orthopedic Surgery, Bellvitge University Hospital, L’Hospitalet de Llobregat, Barcelona, Spain

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Jose Luis Agulló Department of Orthopedic Surgery, Bellvitge University Hospital, L’Hospitalet de Llobregat, Barcelona, Spain

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Miguel Angel Ruiz-Iban Ramón y Cajal University Hospital, Madrid, Spain

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Introduction Isolated posterior instability is reported as being the least common of all glenohumeral instabilities, representing from 2 to 10% of all cases ( 1 , 2 ). In certain demographic groups, such as athletes in contact sports, rowers

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Kaustubh Ahuja Department of Orthopaedic Surgery, All India Institute of Medical Sciences, Uttarakhand, India

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Syed Ifthekar Department of Orthopaedic Surgery, All India Institute of Medical Sciences, Uttarakhand, India

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Samarth Mittal Department of Orthopaedic Surgery, All India Institute of Medical Sciences, Uttarakhand, India

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Gagandeep Yadav Department of Orthopaedic Surgery, All India Institute of Medical Sciences, Uttarakhand, India

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Bhaskar Sarkar Department of Orthopaedic Surgery, All India Institute of Medical Sciences, Uttarakhand, India

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Pankaj Kandwal Department of Orthopaedic Surgery, All India Institute of Medical Sciences, Uttarakhand, India

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Introduction Spinal instability constitutes an important indication for surgical stabilization in a number of spinal pathologies. Since the time of the description of the ‘middle path regime’ by Tuli in 1975, spinal instability has constituted

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Stefan Bauer Ensemble hospitalier de la Côte, Chirurgie de l’épaule, Chemin du Crêt 2, Morges, Vaud, Switzerland
The University of Western Australia, Perth, Australia

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Phillipe Collin CHP Saint-Gregoire, 6 Boulevard de la Boutière 35760 Saint-Grégoire, France
Clinique Victor Hugo, 5 Bis rue du Dôme 75016 Paris, France
American Hospital of Paris, 55 Boulevard du Château, 92200 Neuilly-sur-Seine, France

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Matthias A Zumstein Shoulder, Elbow and Orthopaedic Sports Medicine, Sonnenhof Orthopaedics, Bern, Switzerland
Shoulder, Elbow Unit, Sportsclinicnumber1, Papiermuehlestrasse 73, 3014 Bern, Switzerland
Shoulder, Elbow and Orthopaedic Sports Medicine, Department of Orthopaedic Surgery and Traumatology, Inselspital, Bern University Hospital, Bern, Switzerland

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Lionel Neyton Ramsay Santé, Hôpital Privé Jean Mermoz, Centre Orthopédique Santy, Lyon, France

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William G Blakeney The University of Western Australia, Perth, Australia
Royal Perth Hospital, Perth, Australia

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Introduction Chronic traumatic anterior shoulder instability can be defined as recurrent instability having required glenohumeral reduction and being associated with a bony (Hill–Sachs or glenoid) or capsuloligamentous and labral lesion

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Emilio Calvo Shoulder and Elbow Reconstructive Surgery Unit, Department of Orthopedic Surgery and Traumatology, Hospital Universitario Fundación Jiménez Díaz, Madrid, Spain

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María Valencia Shoulder and Elbow Reconstructive Surgery Unit, Department of Orthopedic Surgery and Traumatology, Hospital Universitario Fundación Jiménez Díaz, Madrid, Spain

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Antonio Maria Foruria Shoulder and Elbow Reconstructive Surgery Unit, Department of Orthopedic Surgery and Traumatology, Hospital Universitario Fundación Jiménez Díaz, Madrid, Spain

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Juan Aguilar Gonzalez Shoulder and Elbow Reconstructive Surgery Unit, Department of Orthopedic Surgery and Traumatology, Hospital Universitario Fundación Jiménez Díaz, Madrid, Spain

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Introduction The Latarjet procedure is a surgical technique especially recommended for patients with anterior recurrent instability in the presence of a critical glenoid bone loss ( 1 , 2 ). It can also be considered the treatment of choice

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Mohamed G. Morsy El-Hadara Orthopaedic and Traumatology Hospital, Alexandria University, Egypt

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recurrent anterior glenohumeral dislocations. 2 , 3 It has been reported that humeral head defects contribute to anterior shoulder instability in 40% to 70% of patients with a first-time dislocation, and up to 90% of recurrent cases. 4 , 5

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Giovanni Di Giacomo Concordia Hospital for Special Surgery Rome, Italy

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Luigi Piscitelli Concordia Hospital for Special Surgery Rome, Italy

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Mattia Pugliese Università degli Studi di Roma La Sapienza, Dipartimento di Medicina Sperimentale, Trauma and Orthopaedics, Rome, Italy

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concavity were further studied by Moroder et al 21 , 22 and Peltz et al, 23 whose studies established a correlation between the loss of glenoid concavity and instability: in fact, both in traumatic and atraumatic shoulder instability, the glenoid

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