Letter to the Editor: Regional variation in low-value musculoskeletal surgery: a nationwide study from the Finnish Care Register by Christopher W Digiovanni, C Niek van Dijk, Mark Glazebrook, Helka Koivu, Mikko Hautamäki, Anssi Härkönen, Masato Takao, Manfred Thomas, Marko Mykkänen, James W Stone, Alastair Younger

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Survival rate and use of revision components in total knee arthroplasty following unicompartmental knee arthroplasty or proximal tibial osteotomy: an analysis of 11,983 procedures... by Maarten R Huizinga, Astrid J de Vries, Liza N van Steenbergen, Reinoud W Brouwer

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Long-term migration of monoblock vs modular design in uncemented total knee arthroplasty: a secondary report of a randomized trial using radiostereometric analysis by Mikkel Rathsach Andersen, Müjgan Yilmaz, Nikolaj Winther, Thomas Lind, Henrik Schrøder, Gunnar FLIVIK Flivik, Michael Mørk Petersen

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Perspective: The unstable concept of “stability” in osteoporotic 2-part proximal humerus fractures by Stig Brorson

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Clinical prediction models for patients undergoing total hip arthroplasty: an external validation based on a systematic review and the Dutch Arthroplasty Register by Maartje Belt, Katrijn Smulders, B Willem Schreurs, Gerjon Hannink

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Mortality and reoperations following treatment of acetabular fractures in patients ≥ 70 years: a retrospective cohort study of 247 patients by Johan Ljungdahl, Björn Hernefalk, Anna Pallin, Anders Brüggemann, Nils P Hailer, Olof Wolf

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Superstition in arthroplasty: does a suspicious size or surgery date have a higher revision rate? A Dutch arthroplasty register study by Jeroen C van Egmond, Jantsje H Pasma, Liza N van Steenbergen, Olav P van der Jagt

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Digital health literacy in Norwegian patients with hip and knee arthroplasty: normative data from a cross-sectional study by Turid Rognsvåg, Ingrid K Nordmo, Ingvild B Bergvad, Anne M Fenstad, Ove Furnes, Anners Lerdal, Maren F Lindberg, Søren T Skou, Mona Badawy

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Sex-based differences in risk of revision for infection after hip, knee, shoulder, and ankle arthroplasty in osteoarthritis patients: a multinational registry study of 4,800,000 im... by Anne M C Roerink, Rob G H H Nelissen, Carl Holder, Stephen E Graves, Michael Dunbar, Eric Bohm, Alexander W Grimberg, Arnd Steinbrück, Håvard Dale, Anne Marie Fenstad, Ashley W Blom, Erik Lenguerrand, Christopher Frampton, Tine Willems, Jan Victor, Mireia Espallargues, Jorge Arias-de la torre, Enrico Ciminello, Marina Torre, Bart G Pijls

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Double trouble! Concomitant distal ulna fractures predict worse 1-year outcome in distal radius fractures: a registry-based cohort study of 5,536 patients by Linnea Arvidsson, Marcus Landgren, Anna Kajsa Harding, Antonio Abramo, Magnus Tägil

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Frequency of safety signals from scientific reports, manufactures, registers, and other sources for a random selection of hip and knee prostheses by Yijun Ren, Lotje A Hoogervorst, Enrico G Caiani, Perla J Marang-van de Mheen, James A Smith, Alan G Fraser, Rob G H H Nelissen, Anne Lübbeke

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Machine learning-based prediction of short- and long-term mortality for shared decision-making in older hip fracture patients: the Dutch Hip Fracture Audit algorithms in 74,396 cas... by Hidde Dijkstra, Cathleen S Parsons, Hanne-Eva VAN Bremen, Hanna C Willems, Anne A H De Hond, Barbara C van Munster, Job N Doornberg, Jacobien H F Oosterhoff

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Ulnar shortening osteotomy for ulna impaction syndrome with positive ulnar variance: retrospective outcome analysis by Marisa Valentini, Eva Kalcher, Silvia Zötsch, Andreas Leithner, Philipp Lanz

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Perspective: The misleading label of atypical femur fracture: a call for diagnostic clarity amid biological diversity by Jörg Schilcher

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Risk of secondary surgery following surgical treatment of fractures: a nationwide register study on 9,719 adult patients by Anders Bo Roennegaard, Signe Steenstrup Jensen, Peter Toft Tengberg, Per Hviid Gundtoft, Bjarke Viberg

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Association of socioeconomic inequality and risk of periprosthetic joint infection after total knee arthroplasty: a Danish cohort study of 75,141 cases by Marie Anneberg, Anders Troelsen, Per Gundtoft, Alma B Pedersen

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Evaluation of sonication for the detection of periprosthetic joint infection in hip revision arthroplasty: a retrospective observational single-center study of 288 episodes by Bernhardt Kickinger, Tor Monsen, Emma Karis, Micael Widerström, Petter Sundin, Kjell G Nilsson, Volker Otten, Sead Crnalic

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Patient-reported outcome was close to the Danish background population 6 months after non-surgical treatment of Neer 2-part surgical neck fractures: a prospective cohort study in p... by Stig Brorson, Signe A Borg, Line L Houkjær, Kenneth B Holtz, Zaid Issa

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The power of registries and radiostereometric analysis (RSA) by Michael Dunbar, Leif Ryd

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Clinical reliability of 6 meniscal tests: a diagnostic accuracy study of 255 patients by Giuseppe Rinonapoli, Lorenzo Lucchetta, Giulio Ancillai, Francesco Manfreda, Paolo Ceccarini, Auro Caraffa

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