• Arch Orthop Trauma Surg · Aug 2023

    Multicenter Study

    A predictive score of high tibial osteotomy survivorship to help in surgical decision-making: the SKOOP score.

    • Cécile Batailler, Thomas Gicquel, Nicolas Bouguennec, Camille Steltzlen, Nicolas Tardy, Jean-Loup Cartier, Patrice Mertl, Régis Pailhé, Goulven Rochcongar, Jean Marie Fayard, and Francophone Arthroscopy Society.
    • Orthopaedics Surgery and Sports Medicine Department, FIFA Medical Center of Excellence, Croix-Rousse Hospital, Lyon University Hospital, Lyon, France. cecile-batailler@hotmail.fr.
    • Arch Orthop Trauma Surg. 2023 Aug 1; 143 (8): 484348514843-4851.

    IntroductionThe high tibial osteotomy (HTO) survival rate is strongly correlated with surgical indications and predictive factors. This study aims to assess HTO survival in the long term, to determine the main predictive factors of this survival, to propose a predictive score for HTO based on those factors.MethodsThis multicentric study included 481 HTO between 2004 and 2015. The inclusion criteria were all primary HTO in patients 70 years old and younger, without previous anterior cruciate ligament injury, and without the limitation of body mass index (BMI). The assessed data were preoperative clinical and radiological parameters, the surgical technique, the complications, the HKA (hip knee ankle angle) correction postoperatively, and the surgical revision at the last follow-up.ResultsThe mean follow-up was 7.8 ± 2.9 years. The HTO survival was 93.1% at 5 years and 74.1% at 10 years. Age < 55, female sex, BMI < 25 kg/m2 and incomplete narrowing were preoperative factors that positively impacted HTO survival. A postoperative HKA angle greater than 180° was a positive factor for HTO survival. The SKOOP (Sfa Knee OsteOtomy Predictive) score, including age (threshold value of 55 years), BMI (threshold values of 25 and 35 kg/m2), and the presence or absence of complete joint line narrowing, have been described. If the scale was greater than 3, the survival probability was significantly lower (p < 0.001) than if the scale was less than 3.ConclusionA predictive score including age, BMI, and the presence or absence of joint line narrowing can be a helpful in making decisions about HTO, particularly in borderline cases.Level Of EvidenceRetrospective cohort study.© 2022. The Author(s), under exclusive licence to Springer-Verlag GmbH Germany, part of Springer Nature.

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