Park JY, Kwon HM, Lee WS, et al. - This study was intended to collect anthropometric data about the safe zone for the placement of transacetabular screws by examining the three-dimensional (3D) reconstruction model and determine the safe length of transacetabular screws by conducting the 3D simulated surgery. Researchers examined 50 hips of 25 patients who had undergone lower extremities angiographic computed tomography scans retrospectively. The customized computer software was applied to reconstruct the 3D models of 50 hips with normal pelvic bone and vascular status. They assessed the central angle and safe depth of the safe zone of the transacetabular screws on the 3D models. The 3D simulated surgery was also conducted to confirm the safe length of screws in each hole of the customized cup implant. The quantitative measurements obtained can help decrease the incidence of pelvic vascular injury during transacetabular screw fixation in total hip arthroplasty, although this research was limited by the use of a virtual computer program.