Subtalar arthroereisis in the neurologically normal child.

The problem of hypermobile or flexible flatfoot in children has been well documented in the medical literature for many years, and refers to a foot that has excessive motion in the form of pronation at the subtalar joint. The clinical presentation of a hypermobile flatfoot can be observed in all three planes. The use of arthroereisis to treat hypermobile flatfoot has been shown to effect the foot in all three planes; however, the most significant clinical improvement usually is seen in the frontal plane where a dramatic reduction of calcaneovalgus is often apparent. The authors provide figures and procedure for the surgical insertion of the subtalar arthroereisis (STA) peg.