Florian Gebhard, Phil Kregor, Chris Oliver
Rick Buckley, Chris Colton
These fractures may be due to direct blow to the knee, such as a dashboard injury, or to a hyperflexion injury. They are classified by the AO/OTA as 34C2 fractures.
The patellofemoral joint surface may be injured, associated with impaction deformation of the patellar joint surface that can be difficult to restore anatomically and stably.