Assessment of Evertor Strength Following Inferior Extensor Retinaculum Flap Ligamentoplasty in Patients With Chronic Lateral Ankle Instability.

The Journal of Foot and Ankle Surgery : Official Publication of the American College of Foot and Ankle Surgeons
Jean-Charles GiuntaYves Tourné

Abstract

The primary aim of our study was to evaluate the strength of ankle evertor muscles in patients who have undergone a lateral ankle ligamentoplasty (which combined tensioning of the primary ligament group and reinforcing it with a pediculated extensor retinaculum flap), using 2 measurement systems (isokinetic and the functional weightbearing test [MyoLux). Our hypothesis was the strength of evertor muscles on the treated side was comparable to that of the contralateral healthy side. This prospective study included 23 patients who had chronic ankle instability and underwent an inferior extensor retinaculum flap ligamentoplasty. Clinical and functional results were assessed using the American Orthopaedic Foot & Ankle Society and Karlsson scores. The evertor muscle strength was analyzed, in both treated and healthy contralateral ankles, using isokinetic testing (gold standard) - an open kinetic chain test and a functional closed kinetic chain test (MyoLux). Data were interpreted using the Stata 14.0 software. The American Orthopaedic Foot & Ankle Society score was 88.1 ± 4.5, and the Karlsson score was 89.6 ± 4.0. Isokinetic tests did not show any significant difference between the treated ankles and the healthy one. Functional test...Continue Reading

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