An extraordinary mechanism causing intraoperative migration of the kirschner-wire

Migration of kirschner wires (k-wires) postoperatively and with use of cannulated implants intraoperatively is a well-known complication. in this article,we present an extraordinary mechanism causing intraoperative migration of a k-wire. a k-wire which was used for temporary fixation of fracture fragments migrated forwardly due to its contact with the drill bit while drilling a hole for a screw. the interaction between the k-wire and the drill bit simulated a gear wheel effect and thus the rotating k-wire advanced. although no complications occurred in this case,we believe that the mentioned mechanism may be of importance particularly in osteoporotic patients and may cause damage to vital structures.