41 physically active patients with chronic instability (>3 months) of the calcaneofibular ligament and the anterior talofibular ligament were randomized to receive either the modified Brostrom-Gould procedure or the synthetic ligament augmentation reconstruction system. The purpose of this study was to compare the clinical outcomes of both aforementioned procedures. Functional outcomes for the ankle and hindfoot were assessed through the foot and ankle score (FAOS) questionnaire at baseline, 12, and 24 months following surgery. The results indicated that patients who received the ligament augmentation reconstruction system had significantly greater FAOS scores, indicating that the procedure effectively lowered pain and symptoms, and improved overall quality of life.