supramalleolar orthotic

su·pra·mal·le·o·lar or·thot·ic

(SMO) (sū'pră-mal-ē'ō-lar ōr-thot'ik)
A foot orthotic that extends only above the malleoli, thus stabilizing the ankle-foot complex.
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References in periodicals archive ?
When less support is required, supramalleolar orthotics (SMOs) that look like a high-top sneaker with an open front can be used.