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Richard Peter Almeida Arthroplasty Unit, Division of Orthopaedic Surgery, Charlotte Maxeke Johannesburg Academic Hospital, University of the Witwatersrand, Johannesburg, South Africa

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Lipalo Mokete Arthroplasty Unit, Division of Orthopaedic Surgery, Charlotte Maxeke Johannesburg Academic Hospital, University of the Witwatersrand, Johannesburg, South Africa

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Nkhodiseni Sikhauli Arthroplasty Unit, Division of Orthopaedic Surgery, Charlotte Maxeke Johannesburg Academic Hospital, University of the Witwatersrand, Johannesburg, South Africa

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Allan Roy Sekeitto Arthroplasty Unit, Division of Orthopaedic Surgery, Charlotte Maxeke Johannesburg Academic Hospital, University of the Witwatersrand, Johannesburg, South Africa

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Jurek Pietrzak Arthroplasty Unit, Division of Orthopaedic Surgery, Charlotte Maxeke Johannesburg Academic Hospital, University of the Witwatersrand, Johannesburg, South Africa

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Introduction Primary total joint arthroplasty (TJA), including total hip arthroplasty (THA) and total knee arthroplasty (TKA), are highly successful, reproducible surgical procedures. The demand for TJA is increasing globally, with projections

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R J M Morrison Northumbria Healthcare NHS Foundation Trust, Ashington, UK
Newcastle University, Newcastle upon Tyne, UK

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W G Fishley Northumbria Healthcare NHS Foundation Trust, Ashington, UK
University of York, York, UK

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K S Rankin Newcastle University, Newcastle upon Tyne, UK
The Newcastle upon Tyne Hospitals NHS Foundation Trust, Newcastle upon Tyne, UK

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M R Reed Northumbria Healthcare NHS Foundation Trust, Ashington, UK
University of York, York, UK

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been associated with a range of adverse post-operative outcomes ( 3 ), and there is a high incidence of deficiency reported in patients undergoing total hip (THR) or knee (TKR) arthroplasty ( 4 ). Previous systematic reviews ( 4 , 5 , 6 , 7 ) have

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Mark D Kohn Department of Orthopaedic Surgery and Sports Medicine, University of Washington, Seattle, Washington, USA

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Charles J Wolock Department of Biostatistics, University of Washington, Seattle, Washington, USA

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Isaac J Poulson School of Medicine, University of Washington, Seattle, Washington, USA

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Navin D Fernando Department of Orthopaedic Surgery and Sports Medicine, University of Washington, Seattle, Washington, USA

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been shown to incur some of the highest costs of care as reflected by reimbursements during the 90-day global period ( 2 ). With projected annual rates of total hip arthroplasty (THA) and total knee arthroplasty (TKA) expected to increase exponentially

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Claudio Legnani IRCCS Istituto Ortopedico Galeazzi, Sports Traumatology and Minimally Invasive Articular Surgery Center, Milan Italy

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Andrea Parente IRCCS Istituto Ortopedico Galeazzi, Hip and Knee Arthroplasty Surgery Center, Milan, Italy

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Franco Parente IRCCS Istituto Ortopedico Galeazzi, Hip and Knee Arthroplasty Surgery Center, Milan, Italy

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Alberto Ventura IRCCS Istituto Ortopedico Galeazzi, Sports Traumatology and Minimally Invasive Articular Surgery Center, Milan Italy

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Purpose

  • It is debatable whether or not previous high tibial osteotomy (HTO) has negative effects on the results of subsequent medial unicompartmental knee replacement (UKR). The purpose of this study is to report, through a systematic review of the literature, the outcomes of medial UKR after failed HTO. It was hypothesized that this procedure would be safe and effective in providing satisfactory postoperative functional outcomes.

Methods

  • A systematic review was performed by searching Pubmed/MEDLINE, Embase and CINAHL. Only studies in English pertaining to all levels of evidence reporting on subjects undergoing UKR following HTO were considered. Review articles and expert opinion or editorial pieces were excluded. Outcomes of interest included indications, surgical technique and associated procedures, type of prosthesis, clinical and functional outcomes, rate of complications, revision surgery and failure rate.

Results

  • Overall, six studies met all the inclusion criteria for this review. All were published between 2006 and 2021. The search resulted in one prospective comparative study, four retrospective comparative cohort studies, and one retrospective cohort study. Average follow-up periods ranged from 1 to 13 years. From these studies, 115 patients (117 knees) were identified. Overall, most studies reported satisfying postoperative clinical and functional outcomes. Implant survivorship ranged from 66 to 97.6%. In 15 patients, revision surgery was performed due to persistent pain.

Conclusions

  • Medial UKR performed after failed HTO appears as a feasible procedure providing satisfying outcomes and limited complications in most cases. Further prospective comparative studies reporting long-term outcomes are needed, as high-level studies on this topic are lacking.

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Aline Van Oevelen Department of Orthopaedics, University Hospital of Ghent, Ghent, Belgium
Department of Orthopaedics, University Hospital of Ghent, Ghent, Belgium

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Arne Burssens Department of Orthopaedics, University Hospital of Ghent, Ghent, Belgium

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Nicola Krähenbühl Department of Orthopaedics, University Hospital Basel, Basel, Switzerland

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Alexej Barg Department of Orthopaedics and Trauma, University Medical Center Hamburg-Eppendorf, Hamburg, Germany

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Bernhard Devos Bevernage Department of Orthopaedics, University Hospital of Ghent, Ghent, Belgium

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Emmanuel Audenaert Department of Orthopaedics, University Hospital of Ghent, Ghent, Belgium
Department of Electromechanics, InViLab research group, University of Antwerp, Antwerp, Belgium
Department of Trauma and Orthopedics, Addenbrooke’s Hospital, Cambridge University Hospitals NHS Foundation Trust, Cambridge, UK

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Beat Hintermann Department of Orthopaedics, Kantonsspital Baselland, Liestal, Switzerland

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Jan Victor Department of Orthopaedics, University Hospital of Ghent, Ghent, Belgium

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short and long term ( 5 , 6 , 10 , 11 , 12 , 13 , 14 ). At present, osteotomy surgeries around the knee are preoperatively planned with a focus on the hip–knee–ankle (HKA) axis. As this HKA axis stops at the tibial plafond, the hindfoot is not

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Colby Foster Department of Orthopaedic Surgery, Michigan Medicine, Ann Arbor, Michigan, USA

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Christopher Posada Department of Orthopaedic Surgery, Michigan Medicine, Ann Arbor, Michigan, USA
Department of Biomedical Engineering, University of Michigan, Ann Arbor, Michigan, USA

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Bryan Pack River Valley Orthopaedics/Orthopaedic Associates of Michigan, Grand Rapids, Michigan, USA

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Brian R. Hallstrom Department of Orthopaedic Surgery, Michigan Medicine, Ann Arbor, Michigan, USA

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Richard E. Hughes Department of Orthopaedic Surgery, Michigan Medicine, Ann Arbor, Michigan, USA
Department of Biomedical Engineering, University of Michigan, Ann Arbor, Michigan, USA
Department of Industrial & Operations Engineering, University of Michigan, Michigan, USA

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. National arthroplasty registries have existed for decades and are used around the world. The Swedish Knee Arthroplasty Register 3 and Swedish Hip Arthroplasty Register 4 were started in 1975 and 1979, respectively, and additional national

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Olivier Courage Ramsay Santé, Hopital Prive de l'Estuaire, LeHavre, France

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Louise Strom ReSurg SA, Nyon, Switzerland

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Floris van Rooij ReSurg SA, Nyon, Switzerland

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Matthieu Lalevée Ramsay Santé, Hopital Prive de l'Estuaire, LeHavre, France
Hôpital Charles Nicolle, CHU de Rouen, Rouen, France

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Donatien Heuzé Ramsay Santé, Hopital Prive de l'Estuaire, LeHavre, France
Hôpital Charles Nicolle, CHU de Rouen, Rouen, France

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Pierre Emanuel Papin Ramsay Santé, Hopital Prive de l'Estuaire, LeHavre, France
Hôpital Charles Nicolle, CHU de Rouen, Rouen, France

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Michael Butnaru Ramsay Santé, Hopital Prive de l'Estuaire, LeHavre, France
Hôpital Charles Nicolle, CHU de Rouen, Rouen, France

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Jacobus Hendrik Müller ReSurg SA, Nyon, Switzerland

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review on the outcomes of total hip arthroplasty and TKA, and found higher risks of complications and mortality in older patients. In 2016, Kuperman et al 17 published a meta-analysis of comparative studies performed over the two preceding decades and

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E. Carlos Rodríguez-Merchán Department of Orthopaedic Surgery, La Paz University Hospital-IdiPaz, Madrid, Spain

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outpatient TKA than inpatient TKA, including component failure, surgical site infection, knee stiffness and deep vein thrombosis. 14 According to Gogineni et al, outpatient total hip arthroplasty (THA) and TKA in a well-selected patient is feasible in

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Ismail Remzi Tözün Department of Orthopaedic Surgery and Traumatology, Acibadem Mehmet Ali Aydınlar University, School of Medicine, Acibadem Maslak Hospital, Sarıyer/Istanbul, Turkey

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Vahit Emre Ozden Department of Orthopaedic Surgery and Traumatology, Acibadem Mehmet Ali Aydınlar University, School of Medicine, Acibadem Maslak Hospital, Sarıyer/Istanbul, Turkey

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Goksel Dikmen Department of Orthopaedic Surgery and Traumatology, Acibadem Mehmet Ali Aydınlar University, School of Medicine, Acibadem Maslak Hospital, Sarıyer/Istanbul, Turkey

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Kayahan Karaytuğ Department of Orthopaedic Surgery and Traumatology, Acibadem Mehmet Ali Aydınlar University, School of Medicine, Acibadem Maslak Hospital, Sarıyer/Istanbul, Turkey

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Parvizi J . Infection burden for hip and knee arthroplasty in the United States . J Arthroplasty 2008 ; 23 : 984 – 991 . 4. Kurtz SM Ong KL Lau E Bozic KJ Berry D Parvizi J . Prosthetic

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Vikki Wylde Musculoskeletal Research Unit, Bristol Medical School, University of Bristol, UK.
National Institute for Health Research Bristol Biomedical Research Centre, University Hospitals Bristol NHS Foundation Trust and University of Bristol, UK.

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Andrew Beswick Musculoskeletal Research Unit, Bristol Medical School, University of Bristol, UK.

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Julie Bruce Warwick Clinical Trials Unit, Warwick Medical School, University of Warwick, UK.

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Ashley Blom Musculoskeletal Research Unit, Bristol Medical School, University of Bristol, UK.
National Institute for Health Research Bristol Biomedical Research Centre, University Hospitals Bristol NHS Foundation Trust and University of Bristol, UK.
North Bristol NHS Trust, Southmead Hospital, Bristol, UK.

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Nicholas Howells North Bristol NHS Trust, Southmead Hospital, Bristol, UK.

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Rachael Gooberman-Hill Musculoskeletal Research Unit, Bristol Medical School, University of Bristol, UK.
National Institute for Health Research Bristol Biomedical Research Centre, University Hospitals Bristol NHS Foundation Trust and University of Bristol, UK.

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found to be associated with an almost three-fold risk of moderate to severe chronic pain after surgery compared with other surgical procedures. 6 Within orthopaedics, the prevalence of chronic pain after TKA is much higher than after total hip

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