Inclusion criteria

All randomized controlled trials (RCTs) and non-randomized controlled trials (non-RCTs) comparing TiRobot‑assisted and fluoroscopy-assisted percutaneous sacroiliac screw fixation for pelvic ring injuries were identified and included in the search strategy. These studies should meet the following inclusion criteria: (1) All papers with data on pelvic fracture were included. (2) TiRobot‑assisted percutaneous sacroiliac screw fixation for pelvic ring injuries was involved. (3) The comparator was conventional fluoroscopy-assisted percutaneous sacroiliac screw fixation in the original comparative study. (4) At least one of the following indexes was reported: radiation exposure time of screw implantation, frequency of intraoperative fluoroscopy, guide wire attempts, intraoperative blood loss, operative time, fracture healing time, screw accuracy, Majeed score, overall excellent and good rates of Majeed score and reduction accuracy. The operative time was defined from the start after sterile draping to the end of skin closure, which means that for the robot group, the time for robot preparation is also included in the intraoperative time. During each X-ray exposure, the fluoroscopy system calculated and displayed the real-time exposure seconds. The total fluoroscopy time of each screw implantation was recorded, which included the fluoroscopy for verifying the correct position of the screw placement after screw-setting. Intraoperative blood loss is the sum of the amount of blood through the suction apparatus and the bleeding volume at the gauze. We also excluded studies that had unclear or incomplete sample data.