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Julia E J W Geilen Department of Orthopaedic Surgery and Traumatology, Zuyderland Medical Center, Sittard-Geleen and Heerlen, the Netherlands

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Sem M M Hermans Department of Orthopaedic Surgery and Traumatology, Zuyderland Medical Center, Sittard-Geleen and Heerlen, the Netherlands
Care and Public Health Research Institute (CAPHRI) Maastricht University, Maastricht, the Netherlands

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Ruud Droeghaag Department of Orthopaedic Surgery and Traumatology, Zuyderland Medical Center, Sittard-Geleen and Heerlen, the Netherlands
Care and Public Health Research Institute (CAPHRI) Maastricht University, Maastricht, the Netherlands

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Martijn G M Schotanus Department of Orthopaedic Surgery and Traumatology, Zuyderland Medical Center, Sittard-Geleen and Heerlen, the Netherlands
Care and Public Health Research Institute (CAPHRI) Maastricht University, Maastricht, the Netherlands

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Emil H van Haaren Department of Orthopaedic Surgery and Traumatology, Zuyderland Medical Center, Sittard-Geleen and Heerlen, the Netherlands

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Wouter L W van Hemert Department of Orthopaedic Surgery and Traumatology, Zuyderland Medical Center, Sittard-Geleen and Heerlen, the Netherlands

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disadvantages. The most used approaches are the direct anterior approach (DAA), posterior approach (PA), and straight lateral approach (SLA). Each approach can accomplish safe and efficient reconstruction of the joint ( 8 ). DAA is claimed to result in shorter

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Philippe Chiron Orthopédie Traumatologie, Secteur A, Batiment riquet, étage 5, CHU Toulouse, Toulouse Cedex 9, France

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Nicolas Reina Orthopédie Traumatologie, Secteur A, Batiment riquet, étage 5, CHU Toulouse, Toulouse Cedex 9, France

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Introduction In most instances, fractures of the femoral head are the consequence of a high-energy trauma with posterior dislocation of the femoral head. A concomitant fracture of the posterior wall of the acetabulum is frequent. These

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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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significantly higher WOMAC scores. Zhao et al 11 compared 60 DAA with 60 posterior approach (PA) total hip arthroplasty (THA) patients for a minimum of six months. The DAA group had improved postoperative pain scores, whereas UCLA hip score and HHS were

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Kavin Sundaram Cleveland Clinic Foundation, Department of Orthopedics Cleveland, Ohio, USA

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Ahmed Siddiqi Cleveland Clinic Foundation, Department of Orthopedics Cleveland, Ohio, USA

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Atul F. Kamath Cleveland Clinic Foundation, Department of Orthopedics Cleveland, Ohio, USA

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Carlos A. Higuera-Rueda Cleveland Clinic Florida, Department of Orthopedics Weston, Florida, USA

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hip arthrodesis, 7 as well as revision hip arthroplasty in patients with abductor deficiency as the modified TSO preserves the posterior capsule and short external rotators. 8 Contrary to TSO, both the ETO and transfemoral osteotomy are the

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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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mostly due to the bone growth on the acetabular posterior wall in its supero-lateral aspect. 11 , 12 AR is an abnormal opening of the acetabulum in the sagittal plane in a posterior direction, with an excessive coverage of the femoral head and

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Javier Pizones Spine Unit, Department of Orthopaedic Surgery, Hospital Universitario La Paz, Madrid, Spain

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Eduardo García-Rey Hip Unit, Department of Orthopaedic Surgery, Hospital Universitario La Paz, Madrid, Spain

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has been the sagittal vertical axis (SVA). 8 The SVA is defined as the length of a horizontal line connecting the posterior superior sacral endplate to a vertical plumbline dropped from the centroid of C7. However, further studies have analysed

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Leonardo Tassinari I Department of Orthopedic and Traumatology, IRCCS Istituto Ortopedico Rizzoli, Bologna, Italy
Department of Biomedical and Neuromotor Science-DIBINEM, University of Bologna, Bologna, Italy

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Alberto Di Martino I Department of Orthopedic and Traumatology, IRCCS Istituto Ortopedico Rizzoli, Bologna, Italy
Department of Biomedical and Neuromotor Science-DIBINEM, University of Bologna, Bologna, Italy

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Matteo Brunello I Department of Orthopedic and Traumatology, IRCCS Istituto Ortopedico Rizzoli, Bologna, Italy
Department of Biomedical and Neuromotor Science-DIBINEM, University of Bologna, Bologna, Italy

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Valentino Rossomando I Department of Orthopedic and Traumatology, IRCCS Istituto Ortopedico Rizzoli, Bologna, Italy
Department of Biomedical and Neuromotor Science-DIBINEM, University of Bologna, Bologna, Italy

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Francesco Traina Department of Biomedical and Neuromotor Science-DIBINEM, University of Bologna, Bologna, Italy
Orthopedics-Traumatology and Prosthetic Surgery and Hip and Knee Revision, IRCCS Istituto Ortopedico Rizzoli, Bologna, Italy

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Cesare Faldini I Department of Orthopedic and Traumatology, IRCCS Istituto Ortopedico Rizzoli, Bologna, Italy
Department of Biomedical and Neuromotor Science-DIBINEM, University of Bologna, Bologna, Italy

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control LLD and correct component positioning and sizing were compared to answering the following questions: i) Are there any differences in the incidence and size of LLD between DAA, posterior approach (PA) and anterolateral approach (ALA)? ii) Are there

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Yingze Su Department of Orthopaedics, Xinhua Hospital affiliated to Shanghai Jiao Tong University School of medicine, Yangpu District, Shanghai, People’s Republic of China

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Kangming Chen Department of Orthopaedics, Huashan Hospital, Fudan University, Jing’an, Shanghai, People’s Republic of China

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Jinyan Wu Department of Orthopaedics, Xinhua Hospital affiliated to Shanghai Jiao Tong University School of medicine, Yangpu District, Shanghai, People’s Republic of China

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Junfeng Zhu Department of Orthopaedics, Xinhua Hospital affiliated to Shanghai Jiao Tong University School of medicine, Yangpu District, Shanghai, People’s Republic of China

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Xiaodong Chen Department of Orthopaedics, Xinhua Hospital affiliated to Shanghai Jiao Tong University School of medicine, Yangpu District, Shanghai, People’s Republic of China

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posterior femoral condyles on the axial plane ( 1 ), which is relatively more accepted, while others define it as the angle between the axis of the femoral neck and the transcondylar axis of the knee on the top view ( 2 ). Similar to the variation in its

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George Grammatopoulos The Ottawa Hospital, Ottawa, Ontario, Canada

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Moritz Innmann Heidelberg University Hospital, Heidelberg, Germany

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Philippe Phan The Ottawa Hospital, Ottawa, Ontario, Canada

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Russell Bodner Midwest Orthopedic Institute, Sycamore, United States of America

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Geert Meermans Bravis Hospital, Roosendaal, The Netherlands

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-inclination is the angle between a line tangent to the anterior and posterior edges of the acetabular cup and a horizontal line parallel to the margin of the radiograph ( 48 ). Lumbar lordosis angle (LL) The lumbar lordosis angle is defined by the angle

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Gösta Ullmark Länssjukhuset i Gävle, Sweden

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management of this common complication ( Fig. 3 ). Aetiology Incidence A meta-analysis by Masonis and Bourne 5 involving 13 203 procedures found a dislocation rate of 3.23% after a posterior approach compared with 2.18% after an anterolateral

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