DOI: https://doi.org/10.36347/sasjs.2025.v11i05.019

Pages: 551-557

Introduction: Chronic lateral ankle instability is a frequent complication of poorly managed sprains, accounting for up to 30% of cases. When functional treatment fails, surgical management is indicated. Hemi-Castaing ligamentoplasty using short brevis is an extra-anatomical technique that is frequently used, particularly in France, due to its technical simplicity and reliable results. Objective: To evaluate the clinical and functional results of the Hémicastaing technique in the treatment of chronic lateral ankle instability. Methods: This was a single-centre retrospective study conducted in Trauma Department Orthopaedics A, enrolling 10 patients operated on between January 2018 and December 2022. Inclusion criteria included lateral instability documented clinically and by imaging, resistant to well-conducted functional management. The mean follow-up was 18 months. Assessment was based on the AOFAS, Karlsson and Tegner scores. All patients underwent standardised surgical and rehabilitation protocol. Results: Functional scores improved significantly after surgery, with high overall satisfaction. The average AOFAS score rose from 58 to 89 points, and the Karlsson score from 52 to 88 points. 8 out of 10 patients were able to return to sport an average of 4.5 months after the operation. No recurrence of instability was observed. The post-operative course was uneventful, with only one minor complication (transient algodystrophy). Eversion of the foot and muscle function were preserved. Conclusion: Hemi-Castaing ligamentoplasty is a reliable surgical option for chronic lateral ankle instability, with good functional results, a low complication rate and a satisfactory return to sport. These results confirm the data in the literature, despite a small number of patients.