Antero-posterior radiograph demonstrating SI screw fixation of the posterior pelvic ring in a 67-year-old patient who sustained a AO/OTA 61-C1.3, FFP IIc fracture. A bilateral implant bone anchorage was achieved by cement augmentation around the tip of the SI screw and by a screw washer at the ilium. The anterior pelvic ring was addressed with a supra-acetabular external fixator.