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Maurizio De Pellegrin Pediatric Orthopedic Unit, San Raffaele Hospital, Milan, Italy

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Lucrezia Montanari Pediatric Orthopedic Unit, San Raffaele Hospital, Milan, Italy

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Desiree Moharamzadeh Pediatric Orthopedic Unit, San Raffaele Hospital, Milan, Italy

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Oliver Eberhardt Klinikum Stuttgart Olgahospital und Frauenklinik Stuttgart, Orthopädische Klinik, Stuttgart, Germany

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Introduction The acetabular labrum or ‘labrum’ is a fibrocartilaginous structure which surrounds the acetabulum and contributes to the stability of the femoral head in the acetabular socket by deepening the latter and increasing the articular

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Oliver Marin-Peña Orthopedic Surgery and Traumatology, University Hospital Infanta Leonor, Madrid, Spain

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Marc Tey-Pons Hospital del Mar, Barcelona, Spain

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Luis Perez-Carro Clinica Mompia Santander, Spain

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Hatem G. Said Assiut University Hospital, Assiut, Egypt

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Pablo Sierra Madrid. University Hospital Torrejon, Madrid, Spain

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Pedro Dantas Hospital CUF Descobertas, Lisboa, Portugal

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Richard N. Villar Spire Cambridge Lea Hospital, Cambridge, UK

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, 12 but they all reported better results with labral repair. Interestingly, the results of labral repair alone are as good as labral re-fixation with acetabular rim resection. 13 In cases where the acetabular labrum is irreparable, labral

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Stig Storgaard Jakobsen Department of Orthopaedic Surgery, Aarhus University Hospital, Denmark

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Søren Overgaard Orthopaedic Research Unit, Department of Orthopaedic Surgery and Traumatology, Odense University Hospital, Denmark

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Kjeld Søballe Department of Orthopaedic Surgery, Aarhus University Hospital, Denmark

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Ole Ovesen Orthopaedic Research Unit, Department of Orthopaedic Surgery and Traumatology, Odense University Hospital, Denmark

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Bjarne Mygind-Klavsen Department of Orthopaedic Surgery, Aarhus University Hospital, Denmark

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Christian Andreas Dippmann Section for Sports Traumatology M51, Department of Orthopaedic Surgery, Bispebjerg Hospital, Denmark

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Michael Ulrich Jensen Department of Orthopaedics, Aalborg University Hospital, Denmark

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Jens Stürup Department of Orthopaedics, National University Hospital, Denmark

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Jens Retpen Department of Orthopaedic Surgery, Copenhagen University Hospital, Gentofte, Denmark

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when necessary. These procedures are most commonly performed under general anaesthesia with the patient in the supine position. Under traction, the hip joint is distracted and the central compartment is entered. The cartilage and the acetabular labrum

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Maximilian M. Menger Department of Trauma and Reconstructive Surgery, Eberhard Karls University Tuebingen, BG Trauma Center Tuebingen, Germany

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Benedikt J. Braun Department of Trauma and Reconstructive Surgery, Eberhard Karls University Tuebingen, BG Trauma Center Tuebingen, Germany

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Steven C. Herath Department of Trauma and Reconstructive Surgery, Eberhard Karls University Tuebingen, BG Trauma Center Tuebingen, Germany

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Markus A. Küper Department of Trauma and Reconstructive Surgery, Eberhard Karls University Tuebingen, BG Trauma Center Tuebingen, Germany

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Mika F. Rollmann Department of Trauma and Reconstructive Surgery, Eberhard Karls University Tuebingen, BG Trauma Center Tuebingen, Germany

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Tina Histing Department of Trauma and Reconstructive Surgery, Eberhard Karls University Tuebingen, BG Trauma Center Tuebingen, Germany

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femoral head fracture, fracture displacement, potential fracture fragments in the joint gap and the overall condition of the hip joint. Subsequently, magnetic resonance imaging (MRI) may be obtained to detect an avulsion of the acetabular labrum

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Riccardo D’Ambrosi IRCCS Istituto Ortopedico Galeazzi, Milan, Italy

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Nicola Ursino IRCCS Istituto Ortopedico Galeazzi, Milan, Italy

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Carmelo Messina IRCCS Istituto Ortopedico Galeazzi, Milan, Italy
Dipartimento di Scienze Biomediche per la Salute, Università degli Studi di Milano, Milano, Italy

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Federico Della Rocca Istituto Clinico Humanitas, Rozzano, Italy

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Michael Tobias Hirschmann Department of Orthopaedic Surgery and Traumatology Kantonsspital Baselland (Bruderholz, Liestal, Laufen) Switzerland

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, neutral, and 10° and 40° of flexion) in the intact state and then by sectioning and later repairing the acetabular labrum and ILFL in a randomized order. 8 (16 hips; age 53–68 years) External rotation significantly increased by 12.9°±5.2° after

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Bruno Direito-Santos Orthopaedic Surgery Department, Hospital de Braga, Portugal
Life and Health Sciences Research Institute (ICVS), School of Medicine, University of Minho, Portugal

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Guilherme França Orthopaedic Surgery Department, Hospital de Braga, Portugal

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Jóni Nunes Orthopaedic Surgery Department, Hospital de Braga, Portugal

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André Costa Orthopaedic Surgery Department, Hospital de Braga, Portugal

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Eurico Bandeira Rodrigues Orthopaedic Surgery Department, Hospital de Braga, Portugal

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A. Pedro Silva Orthopaedic Surgery Department, Hospital de Braga, Portugal

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Pedro Varanda Orthopaedic Surgery Department, Hospital de Braga, Portugal
Life and Health Sciences Research Institute (ICVS), School of Medicine, University of Minho, Portugal

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orthostatism suggests a posterior hypo-coverage. 37 Secondary lesions of the acetabular labrum and chondral surface may also be the cause of pain. 38 Pain and discomfort in the buttock, thigh and lumbar region may be associated with it although they

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Markus S. Hanke Department of Orthopaedic and Trauma Surgery, Inselspital, University of Bern, Bern, Switzerland

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Till D. Lerch Department of Diagnostic, Interventional and Pediatric Radiology University Hospital of Bern, Inselspital, University of Bern, Bern, Switzerland

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Florian Schmaranzer Department of Diagnostic, Interventional and Pediatric Radiology University Hospital of Bern, Inselspital, University of Bern, Bern, Switzerland

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Malin K. Meier Department of Orthopaedic and Trauma Surgery, Inselspital, University of Bern, Bern, Switzerland

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Simon D. Steppacher Department of Orthopaedic and Trauma Surgery, Inselspital, University of Bern, Bern, Switzerland

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Klaus A. Siebenrock Department of Orthopaedic and Trauma Surgery, Inselspital, University of Bern, Bern, Switzerland

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. Femoroacetabular impingement: a cause for osteoarthritis of the hip . Clin Orthop Relat Res 2003 ; 417 : 112 – 120 . 3. Ito K Leunig M Ganz R . Histopathologic features of the acetabular labrum in femoroacetabular impingement

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Dominic Davenport Department of Trauma & Orthopaedics, Princess Royal University Hospital & King’s College Hospital, UK

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Venu Kavarthapu Department of Trauma & Orthopaedics, Princess Royal University Hospital & King’s College Hospital, UK

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relationship of the orientation of the transverse acetabular ligament and acetabular labrum to the suggested safe zones of cup positioning in total hip arthroplasty . Hip Int 2008 ; 18 : 1 - 6 . 25 Abe H , Sakai T , Hamasaki T

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Markus S. Hanke Department of Orthopaedic and Trauma Surgery, Inselspital, University of Bern, Bern, Switzerland

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Florian Schmaranzer Department of Diagnostic, Interventional and Pediatric Radiology, University Hospital of Bern, Inselspital, University of Bern, Bern, Switzerland

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Simon D. Steppacher Department of Orthopaedic and Trauma Surgery, Inselspital, University of Bern, Bern, Switzerland

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Till D. Lerch Department of Orthopaedic and Trauma Surgery, Inselspital, University of Bern, Bern, Switzerland

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Klaus A. Siebenrock Department of Orthopaedic and Trauma Surgery, Inselspital, University of Bern, Bern, Switzerland

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osseous abutment supposedly leads to a levering mechanism and de-centralization or dynamic hip instability ( Fig. 5 ). 2 Consequently the femoral head subluxates anteriorly and leads to an inside-out avulsion of the acetabular labrum and tearing of

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