Background: The functional outcome of tibial plateau fractures depends a lot on stable osteosynthesis. It require an exact knowledge of the spatial configuration of the fracture. Our objective is to describe fracture plane base on computer tomography. Methods: We used Schatzker's three-dimensional classification to analyze computed tomography of patients admitted for tibial plateau fractures at the University Hospital Center of Oujda between January 2012 and August 2020. Results: We found 94 fractures, mostly type II and VI with 3 unclassifiable fractures. The anterolateral compartment is the most often affected. The overall tibial plateau coronal fracture lines was 14.89% and is most common among type IV. Conclusion: Characterization of complex tibial plateau fractures with use of the main shear presented in this study may be more reliable for communication among surgeons, comparison of studies, preoperative planning and guiding the surgical approach and specific fixation techniques.