A medially posted orthotic to protect the paediatric plano - valgus foot. All toddlers have flat feet because of a low angle of calcaneal inclination, by 5 to 6 years this angle has increased, and in most cases, a medial longitudinal arch becomes apparent.
The most significant feature of paediatric pes planovalgus is medial bulging in the area of the talo-navicular joint.
Changes which occur effect the pathological flat foot in a manner which render the foot ineffectual at withstanding the forces of ground reaction, which are highest at the propulsive phase of gait.