Fig. 1

The structure and components of DAPSQ. DAPSQ was placed on the superior arcuate line, and the ends extended toward the iliac wing and the superior pubic ramus, respectively. According to the placement trajectory on the pelvis, the DAPSQ plate was divided into three parts: the iliac region, the quadrilateral region, and the pubic region. And the screws placed in the quadrilateral region were called “quadrilateral screws”