In order to truly make a custom orthotic a cast of both feet must be performed. This is the only way to capture the natural contours and three dimensional shape of each foot. Different casting techniques are used depending on the condition and mechanics of the feet. The two methods we use at our clinic are plaster slipper casting and foam. While casting the pedorthist will position and align the foot, this must be done with great skill in order to create an accurate mould. The mould will be used in the manufacturing process of the orthotics. If you are having custom orthotics made make sure a cast of your feet has been taken! If not they are simply pre-made arch supports.