Fig. 3

Simulation of internal fixation. a Fixation parameters were preset, including the width and thickness of plates and screw diameter. b The miniplate was put on the acetabular roof and the screw length near the acetabular rim was measured (red arrow). c–d. The reconstruction plates were automatically contoured onto the virtual bone surface and the required screws were inserted. e–f After the “X-ray model” (yellow arrow) was clicked, the screw placement was further confirmed to avoid intra-articular penetration and the precise length of the screw was recorded (red circle). g The reconstruction plates were contoured based on the 3D-printed template and then sterilized for surgical preparation