Subtalar arthrodesis for flexible hindfoot deformities in children.

Flexible hindfoot valgus deformities in 16 patients (20 feet) with poliomyelitis and 10 patients (16 feet) with cerebral palsy were surgically treated by a modified Dennyson-Fulford operation using a fibular dowel and a screw. The correction achieved was assessed clinically and radiologically after a mean follow-up of 3.6 years. Overall good results were achieved in 86%. There were no cases of under- or over-correction, pseudarthrosis or screw failure. The procedure is suitable even for spastic planovalgus deformities. Complications related to screw position can be avoided by following the recommendations given here. Use of fluoroscopy and cannulated screws facilitate quick and easy completion of the procedure.