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Background:   Increased internal rotation of the talus has been found in patients with mechanical ankle instability (MAI).Purpose/Hypothesis:   To evaluate and compare the talar rotation position before and after lateral ankle lateral stabilization surgery in patients with MAI. We hypothesized that the abnormal internal talus rotation in patients with MAI will decrease after surgery for ankle lateral instability and that there will be no significant difference in internal talus rotation between the ligament repair and reconstruction groups.Study Design:   Case-control study; Level of evidence, 3.Methods:   We retrospectively studied 56 patients with MAI who underwent ankle lateral stabilization surgery after arthroscopic evaluation (repair, 36 cases; reconstruction, 20 cases). Before and after the operation, magnetic resonance images of all the participants were reviewed. The rotated position of the talus was measured and calculated by the Malleolar Talus Index at the magnetic resonance axial plane.Results:   The internal rotation of the talus decreased significantly after ankle lateral stabilization surgery in patients with MAI as compared with before surgery (mean ± SD, 83.3° ± 3.3° vs 86.7° ± 3.9°; P &lt; .01). However, there was no statistically significant difference between the ligament repair and reconstruction groups before or after the operation.Conclusion:   Abnormal internal rotation of the talus in patients with MAI was decreased after ankle lateral stabilization surgery.

Decreasing the Abnormal Internally Rotated Talus After Lateral Ankle Stabilization Surgery