Foot orthotics are widely used to deal with a variety of foot disorders from overpronation and fallen arches to plantar fasciitis and other causes of heel pain. The scientific evidence shows that they are generally effective at fixing a lot of the disorders as long as they are indicated for that problem, Foot orthotics typically get used to support the foot, when support of the foot may have nothing to do with the condition that the person could have. This can lead to them being misused and unnecessarily blamed for treatment failures. Another issue is that there are various sorts of foot orthoses and also within each type of foot orthotic, there is an pretty much infinite variance in the design features that can be integrated into them. If even one of those design features is not really right for the person, then the chances of that foot orthotic helping is probably reduced. This is why the choice of the different designs is really based upon the experience and expertise of the clinician.
The podiatrist will choose the design features necessary for the individual and if the device needs to be customized for the person or if a mass produced less expensive foot orthotic can be used. When it comes to custom made orthoses, the clinician needs to take a plaster cast or laser scan of the foot kept in specific positions for the foot orthotic to be made on. When it comes to the design of the device different elements are taken into account. For example, if the patient has adult acquired flat foot, then something like a MOSI type foot orthotic is necessary. The MOSI has unique modifications to deal with the range of problems that occur in that condition. If the concern is linked to a lack of shock absorption, then the orthotic is required to be designed to cater to that. The plethora of choices is endless and depends on the problem present and the experience of the treating clinician.