when is a rigid insole appropriate
Rigid Orthotics. The so-called rigid orthotic device, designed to control function, may be made of a firm material such as plastic or carbon fiber, and is used primarily for walking or dress shoes. It is generally fabricated from a plaster of paris mold of the individual foot. The finished device normally extends along the sole of the heel to the ball or toes of the foot. It is worn mostly in closed shoes with a heel height under two inches. Because of the nature of the materials involved, very little alteration in shoe size is necessary. Rigid orthotics are chiefly designed to control motion in two major foot joints, which lie directly below the ankle joint.