Fig. 1

Intraoperative pictures of modified INFIX. a Anterior incisions were over both AIIS and the pubic symphysis. b The additional screw was inserted at a tilt angle of from 45° to 60°, positioned 2 cm proud of the pubic tubercle. c The pelvic inlet view confirmed safe placement of the additional screw. d A subcutaneous corridor was developed from the incisions at bilateral AIIS to the Pfannenstiel incision by long hemostats. e Schematic diagram of rod placement. f Three screws at both AIIS and the pubic tubercle forming a stable geometric triangle