bumper fracture

The classically described situation in which this occurs is from a car striking a pedestrian's fixed knee ("bumper fracture").

A Bumper fracture is a fracture of the lateral tibial plateau caused by a forced valgus applied to the knee.

Fractures of the tibia can be divided into those that only involve the tibia; Bumper fracture, Segond fracture, Gosselin fracture, Toddler's fracture, and those including both the tibia and fibula; Trimalleolar fracture, Bimalleolar fracture, Pott's fracture.