Trauma w/ axial load +/- bending force such as auto vs pedestrian or fall+twisting or valgus force.

Associated abnormalities:

• Lateral plateau fx: valgus force -> disruption to ACL and MCL

• Medial plateau fx: high energy which can result in disruption of lateral plaeau (PC), posterolateral corner structures, and LCL w/ popliteal artery.

• Schatzker IV-VI types are most commonly assocaited w dislocations subluxation and more likely to have ST injury.

SCHATZKER CLASSIFICATION

• Types I-III involve the lateral tibial plateau exclusively

  • Type I is seen in younger patients and has no component of depression

  • Type II and II are usually seen in older osteoporotic patients

• Type IV - VI are higher impact injuries and have associated ST injuries

ANATOMY