New, Easy and Efficient Ways to CLassify AcetabulaR Fractures

Acetabular fractures are the resultant from high-energy trauma or low-energy trauma in the elder patients. Usually, surgeons use LETOURNEL's classification or/and JUDET's one. Five elements are considered and associated to five type of fracture. Even more, for orthopaedic surgeons with less experience with these fractures, correct classification can be more difficult. So the the aim of this study is: 1. Evaluate the efficacy of four "special" 3D reconstruction: a 3D reconstruction of the pelvis with anterior view, posterior view, endopelvic view where the opposite hemipelvis removed and an exopelvic view where the femoral head is removed according to the initial teaching of E. Letournel. 2. Evaluate the addition of teaching of non-experimented surgeon on the accuracy of classifying acetabular fractures. 3. Evaluate the addition of a digital algorithm (mobile application) on the accuracy of classifying acetabular fractures.