Knee Injuries
A 30-year-old man presents after a motorcycle accident where his knee struck the dashboard. He has posterior knee pain and an effusion. On examination, there is increased posterior tibial translation with the knee at 90 degrees of flexion. The quadriceps active test is positive. There is no varus or valgus instability. MRI confirms an isolated PCL tear with the tibial step-off measured at 12mm compared to the contralateral knee. Regarding posterior cruciate ligament injuries:
Mark each as TRUE or FALSE
The PCL is the primary restraint to posterior tibial translation (approximately 95% at 90 degrees fl...
Clinical examination: posterior drawer test at 90 degrees flexion assesses posterior translation; gr...
The PCL provides only 50% of restraint to posterior translation; the posterolateral bundle is the la...
Treatment depends on grade and associated injuries: Grade I-II isolated PCL injuries are typically m...
Surgical reconstruction options include single-bundle (anterolateral bundle only) or double-bundle (...
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Click T (True) or F (False) for each option