The classification of acetabular fractures proposed by Letournel and Judet in 1961 is currently the most widely used system although its complexity and a wide variation in the interpretation. Development of CT scans with 2D then 3D reconstructions allow a better comprehension of fracture patterns. We thought that the exopelvic and endopelvic views of a 3D model reconstruction of acetabular fracture which separates each bone fragments by semi-automatic segmentation are sufficient to get a correct classification according to Letournel descriptions.