Partial articular fractures with a split-depression are classified by the AO/OTA as 41B3 fractures, and lateral plateau split depressions are classified by the AO/OTA as 41B3.1 fractures. Preoperative imaging studies are crucial to determine the extent and location of the impacted articular surface. Associated injuries such as ligamentous injuries or meniscal tears may be present and must be considered separately.