Posterior Cruciate Ligament Deficient Patients with Sympto M Have Different Knee Mechanicscompared to the Patients without Symptom during Stair Descending

INTRODUCTION. Patients with posterior cruciate ligament (PCL) deficient sometimes experience giving way during stair descending, although they do not usually have disability in performing most of activities of daily living (ADL). This fact suggests that the patients should have adaptation mechanism to lack of posterior stability during the activity. However the mechanics of PCL deficient knee during ADL is not well understood. The purpose of this study was to analyze knee mechanics of PCL deficient knees during stair descending. Knee kinematics and kinetics of the patients with the symptom were compared to those of the patients without the symptom and healthy knees.