A classification of severity with an analysis of causative problems related to the type of treatment.

The current classification systems provide broad guidelines for treating the acquired adult flat foot. They essentially place the acquired flat foot into categories of no deformity, flexible deformity, or rigid deformity, as well as the condition of the PTT; however, there are many more variables that need to be taken into account to provide optimal care. As our knowledge and experience grows in treating the adult flat foot, more options will be available. The physician treating this condition must stay up-to-date and must not rely solely on the existing classification systems to direct care.