Article

Previous studies have suggested that orthoses with different
constructions could alter gait parameters in flexible flatfoot. However, there is
less evidence about the effect of insoles with proprioceptive mechanism on
plantar pressure distribution in flatfoot. OBJECTIVES: To assess the effect of
orthoses with different mechanisms on plantar pressure distribution in subjects
with flexible flatfoot. METHODS: In total, 12
flatfoot subjects were recruited for this study. In-shoe plantar pressure in
walking was measured by Pedar-X system under three conditions including wearing
the shoe only, wearing the shoe with a proprioceptive insole, and wearing the
shoe with a prefabricated foot insole. RESULTS: Using the proprioceptive insoles,
maximum force was significantly reduced in medial midfoot, and plantar pressure
was significantly increased in the second and third rays (0.94 +/- 0.77 N/kg,
102.04 +/- 28.23 kPa) compared to the shoe only condition (1.12 +/- 0.88 N/kg and
109.79 +/- 29.75 kPa). For the prefabricated insole, maximum force was
significantly higher in midfoot area compared to the other conditions (p < 0.05).
CONCLUSIONS: Construction of orthoses could have an effect on plantar pressure
distribution in flatfeet. It might be considered that insoles with sensory
stimulation alters sensory feedback of plantar surface of foot and may lead to
change in plantar pressure in the flexible flatfoot. CLINICAL RELEVANCE: Based on
the findings of this study, using orthoses with different mechanisms such as
proprioceptive intervention might be a useful method in orthotic treatment.
Assessing plantar pressure can also be an efficient quantitative outcome measure
for clinicians in evidence-based foot orthosis prescription.

Langue : ANGLAIS