Suero EM, Greiner A, Becker CA, et al. - In treatment of traumatic disruptions to the posterior pelvic ring by percutaneous sacroiliac (SI) screw fixation, optimal biomechanical stability could be achieved with a double-screw technique vs a single-screw construct, however, the safe insertion of two sacroiliac (SI) screws is prevented by anatomic variations, and patient-specific characteristics. Researchers here examined if biomechanical stability comparable to that of the double-screw technique could be achieved via cement augmentation of a single SI screw. On 10 human cadaveric pelvis specimens, they tested three sacroiliac screw osteosynthesis configurations: a single cannulated screw; two cannulated screws; and a single, cement-augmented cannulated screw. Under an axial load, they performed measurement of displacement and stiffness of the anterior and posterior pelvic ring after fixation with each technique. As per outcomes, a single cement-augmented cannulated sacroiliac screw leads to achievement of biomechanical stability of the anterior pelvis comparable to that of a non-augmented double-screw technique in the treatment of posterior pelvic ring fractures. Significantly worse stability was observed using a non-augmented sacroiliac single screw vs the double-screw and single cement-augmented screw techniques.