Effects of lateral ankle instability on the variations of repeated talocrural and subtalar joint motions measured using 3d fluoroscopy

Lateral instability of ankle has been shown to be associated with various pathological conditions of ligaments and cartilage. The purpose of the current study was to compare the variations of repeated motions of the ankle joint complex in healthy individuals and patients with lateral ankle instability (LAI). A three-dimensional (3D) fluoroscopy method with a bi-plane fluoroscopy was used to measure the motions of the talocrural and subtalar joints following the repeated paths. The results showed that the control of motions in patients with LAI was more unstable than those in healthy subjects while performing the same activity.