Abstract：Objective To study the clinical efficacy of treating chronic lateral ankle instability caused by different residual degrees of anterjor talofibular ligament (ATFL) injury by using lower extensor retinaculum displacement and joint capsule tightening. Methods The clinical data on 58 patients with chronic lateral ankle instability treated in our hospital between June 2015 and August 2019 was analyzed. These patients were treated with lower extensor retinaculum displacement combined with joint capsule tightening. Their age ranged from 18 to 50, with an average of (25.3±8.6) years old. All the patients were followed up for 12 to 26 (18.1±5.5) months. The foot and ankle outcome score (FAOS) was used to evaluate the function of ankle joints postoperatively, and the repair effect of different residual degrees of anterjor talofibular ligament injury was compared. Results Among the 58 patients screened in this study, 48 showed residual ATFL by preoperative ultrasound. ATFL residues were seen in 42 patients on MRI. According to Cardone et al, ATFL injury grade was diagnosed morphologically: ligament thinning and normal morphology in 19 cases, irregular ligament morphology in 10 cases, and atrophy or loss of broken ends in 29 cases. ATEL residues were found in 17 cases and missing in 41 cases. All the patients were treated with extensor retinaculum displacement and joint capsule compression before follow-up. The functional recovery of the affected limbs was satisfactory. There was no significant difference in the independent components of postoperative FAOSs (P＞0.05). Conclusions For patients with chronic lateral malleolus instability with different residual degrees of anterjor talofibular ligament injury, lower extensor retinaculum displacement combined with joint capsule tightening can achieve good clinical effect.
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2021, Vol. 32 
