Open reduction and internal fixation of acetabular fractures demands detailed preoperative planning, and given their frequent complexity, a thorough understanding of their three-dimensional (3D) form is necessary. This study aims to assess if the use of dynamic 3D models will improve preoperative planning of acetabular fractures.

In this study, three experienced pelvic trauma surgeons were provided with computer based dynamic 3D models in addition to preoperative radiographs, CT scans and static 3D reconstructions of 17 acetabular fractures operatively managed at the Royal Melbourne Hospital.

Surgeons, blinded to any previous operative plan or patient detail, then classified fracture type and made preoperative surgical plans. Comparison was then made to classification and operative approach documented in the patient's operation notes. Comparison was then made with regard to surgical plan and planning time with or without access to dynamic 3D models.

In complex cases the additional information provided by dynamic 3D modelling was found to reduce planning time and, in some cases, change the surgical plan. For complex acetabular fractures we recommend that surgeons should have access to computer-based dynamic 3D models of the injuries for pre-operative planning.