Article

This study aimed to investigate the influence of ankle osteoarthritis (AOA)
treatments, i.e., ankle arthrodesis (AA) and total ankle replacement (TAR), on
the kinematics of multi-segment foot and ankle complex during relatively
long-distance gait. Forty-five subjects in four groups (AOA, AA, TAR, and
control) were equipped with a wearable system consisting of inertial sensors
installed on the tibia, calcaneus, and medial metatarsals. The subjects walked
50-m twice while the system measured the kinematic parameters of their
multi-segment foot: the range of motion of joints between tibia, calcaneus, and
medial metatarsals in three anatomical planes, and the peaks of angular velocity
of these segments in the sagittal plane. These parameters were then compared
among the four groups. It was observed that the range of motion and peak of
angular velocities generally improved after TAR and were similar to the control
subjects. However, unlike AOA and TAR, AA imposed impairments in the range of
motion in the coronal plane for both the tibia-calcaneus and tibia-metatarsals
joints. In general, the kinematic parameters showed significant correlation with
established clinical scales (FFI and AOFAS), which shows their convergent
validity. Based on the kinematic parameters of multi-segment foot during 50-m
gait, this study showed significant improvements in foot mobility after TAR, but
several significant impairments remained after AA.
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Langue : ANGLAIS