Fig. 1

The intact skeleton-ligament pelvic models were set as the control group (A). The pubic symphysis diastasis group were simulated by removing the superior pubic, arcuate pubic, right sacrospinous, right sacrotuberous, and right anterior sacroiliac ligaments (B). Seven fixation devices were installed on pubic symphysis diastasis models, including single plate (C), single plate with trans-symphyseal cross-screws (D), dual plates (E), single cannulated screw (F), dual crossed cannulated screws (G), subcutaneous plates (H), and subcutaneous pedicle screw-rod devices (I)