Fig. 4

Screw was used for fixation in one patient. The 10-month follow-up X-ray showed that the accessory navicular was nonunion (A, C), and revision surgery was performed. The screw was removed, the accessory navicular was resected, and sutured anchor was used for reconstruction of PTT insertion. The functions and appearance improved substantially at the last follow-up, compared to the conditions before the operation (B, D). We speculated that when treating flatfoot with accessory navicular, complete resection of accessory navicular and using the sutured anchor to reconstruct PTT insertion is efficacious due to the poor blood flow for navicular