Opening wedge high tibial osteotomy using a monoaxial dynamic external fixator

Knee Surgery, Sports Traumatology, Arthroscopy : Official Journal of the ESSKA
Nicola MondanelliPaolo Aglietti

Abstract

To prospectively assess midterm results in 37 patients (41 knees) who were treated with opening wedge high tibial osteotomy (OW-HTO) with the use of a monoaxial dynamic external fixator (MDEF) for medial knee osteoarthritis. Clinical and subjective evaluations were performed using the IKDC and KOOS evaluation forms and the modified Knee Society Clinical Rating System (KSS). Pin tract infections were evaluated according to Checketts-Otterburns classification. Radiographic evaluation included long-standing AP lower limb, standard lateral, Rosenberg and Merchant views. Thirty-six patients (40 knees) were evaluated at a mean follow-up period of 7 years. Ten patients (25 %) developed a minor pin tract infection. Subjective KOOS and IKDC scores showed statistically significant improvement. Clinical evaluation with IKDC and KSS forms showed no patient with instability or a range-of-motion deficit worst than pre-operatively. At MDEF removal, the mechanical axis was on average 4.5° valgus; anatomical axis 6.8° valgus; the Mikulicz' line crossed the tibial plateau on average at 64 % of the width of the tibial plateau measured from medial; the posterior slope 5°; the metaphyseal varus 4.3°; and the Insall/Salvati ratio 1.02. At latest fol...Continue Reading

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Citations

Oct 27, 2016·International Journal for Numerical Methods in Biomedical Engineering·Diogo F de AlmeidaMatthieu De Beule
Oct 1, 2018·Knee Surgery, Sports Traumatology, Arthroscopy : Official Journal of the ESSKA·Andreas M SeitzLutz Dürselen

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