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A modified subtalar arthroereisis implant for the correction of flexible flatfoot in children. The STA Peg procedure.

The STA Peg procedure was developed to correct flexible flatfoot in young children prior to the age when secondary deformities are likely to develop. The procedure involves the implantation of a peg fashioned from ultra-high molecular weight polyethylene into the dorsal surface of the calcaneus, anterior to the posterior facet of the subtalar joint and fixed with polymethylmethacrylate. Smith has reported excellent overall results in the great majority of patients. The primary importance of the procedure is its rate of success, coupled with a relatively easy postoperative period, virtually no immobilization, its application for very young patients (beginning at 3 years of age), and its accommodation for the continued growth of the child.