PCL Injury

PCL

• IA ligament: Intracapsular but extrasynovial
• Strongest in knee
• Primary restraint to posterior translation
• AL , PM bundles and MF ligaments
• Origin from PL MFC and insert to central posterior tibia 1 cm below articular surface
• 38 cm , 13 mm Diameter

MOI

• Direct injury with foot plantar flexed and knee 90 degree flexed
• Associated with periarticular and SOF #
• Associated with PLC injury

Diagnosis

• Tibial step off sign
• Posterior drawer test
• Quadriceps active test
• Dial test ER in
  • 30 degree: PLC
  • 90 degree: PCL and PLC
• In c/c injury MRI is positive only in 50%
• Lateral stress view radiograph is Gold standard

Management

• Isolated PCL: little long term instability
• Surgery
  • Asso with PLC/ MPC injury/meniscus