Article

This study aimed to use plantar pressure analysis in relatively
long-distance walking for objective outcome evaluation of ankle osteoarthritis
treatments, i.e., ankle arthrodesis and total ankle replacement. METHODS:
Forty-seven subjects in four groups: three patient groups and controls,
participated in the study. Each subject walked twice in 50-m trials. Plantar
pressure under the pathological foot was measured using pressure insoles. Six
parameters: initial contact time, terminal contact time, maximum force time, peak
pressure time, maximum force and peak pressure were calculated and averaged over
trials in ten regions of foot. The parameters in each region were compared
between patient groups and controls and their effect size was estimated. Besides,
the correlations between pressure parameters and clinical scales were calculated.
FINDINGS: We observed based on temporal parameters that patients postpone the
heel-off event, when high force in forefoot and high ankle moment happens. Also
based on maximum force and peak pressure, the patients apply smoothened maximum
forces on the affected foot. In ten regions, some parameters showed improvements
after total ankle replacement, some showed alteration of foot function after
ankle arthrodesis and some others showed still abnormality after both surgical
treatments. These parameters showed also significant correlation with clinical
scales in at least two regions of foot. INTERPRETATION: Plantar pressure
parameters in relatively long-distance trials showed to be strong tools for
outcome evaluation of ankle osteoarthritis treatments.
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Langue : ANGLAIS