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Custom-Made Ethyl Vinyl Acetate Insoles with Arch Support Could Improve Static Balance in Diabetic Women with Neuropathic Foot
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Background: Individuals with diabetic neuropathy may experience plantar ulcers and postural instability. Although use of an insole with arch support has the potential to decrease the incidence of plantar ulcers, the choice of proper design and material density concerning postural stability is challenging. The objective of this pilot study was to conduct a preliminary evaluation of the immediate effects of custom-made ethyl vinyl acetate insoles with arch support and Shore A values of 30 or 50 on static balance in patients with diabetes and neuropathic foot/feet.
Methods: Ten women with diabetes participated in this study. Static balance was analyzed while in double-limb standing with eyes closed and eyes open and while standing on a dominant limb with eyes open wearing shoes only and wearing shoes and insoles with Shore A values of 30 and 50.
Results: With insole, the mean values of center of pressure excursions decreased significantly while standing on double limbs with eyes closed. The improvement in static balance was greater while using the insole with greater density; however, the difference was not statistically significant.
Conclusions: An insole with arch support made of ethyl vinyl acetate Shore A of 30 and 50, which could decrease plantar pressure concentration, had no negative effect on the static balance of diabetes. Therefore, further research on the long-term effects of such insoles on the static balance of diabetes is suggested.
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