Foot orthoses are frequently used to manage a variety of foot disorders from overpronation and collapsed arches to plantar fasciitis and other causes of heel pain. The research evidence points too they usually are pretty good at helping most of the conditions as long as they are indicated for that problem, Foot orthotics frequently get used to support the foot, when support of the foot might have nothing to do with the condition that the individual could have. This might lead to them being misused and improperly blamed for treatment failures. Another problem is that there are many different types of foot orthotics and also within every type of foot orthotic, there is an almost unlimited variation in the design features that can be included in them. If even one of those design features is not really right for the person, then the probability of that foot orthotic helping is probably reduced. For this reason the choice of the various designs is actually dependant on the expertise and experience of the clinician.

The medical professional will determine the design features required for the individual and if the device needs to be custom made for the person or if a premade more affordable foot orthotic can be used. When it comes to custom made orthotics, the medical professional needs to take a plaster cast or optical scan of the foot kept in specific positions for the foot orthotic to be made on. When it comes to the style of the device different elements are evaluated. For example, if the patient has adult acquired flat foot, then something like a MOSI type foot orthotic is required. The MOSI has special modifications to deal with the range of problems that occur in that disorder. When the problem is related to deficiencies in impact absorption, then the orthotic needs to be designed to accommodate that. The plethora of options is endless and is determined by the problem present and the wishes of the treating clinician.