6/14/2012 12:07 PM
Today's webinar was great! It addressed the role of functional foot orthotics for the unstable ankle.The talk ended with viewers learning two orthotic prescriptions for the unstable ankle. One is for the pronated foot type and the other for the cavus foot type.
The maximally pronated individual needs to be supinated! A wide orthotic will increase the surface area and contact for improved stability. In addition, a deep heel cup will improve stability. Minimum cast fill with a medial heel skive and rearfoot post will help to support the foot in a more neutral position and stop max pronation.
The laterally deviated STJ is already supinated and now needs the opposite to happen, we need some pronation! Again, the wider the orthotic the more surface area contact to add support and feedback with a deep heel cup. However, now I would recommend standard fill to allow some pronation in combination with a rearfoot post without lateral beveling to give a bit of a pronatory torque on the foot. Finally if that isn’t enough, add a top cover and under the forefoot add a valgus extension!