@ Mith : Thanks for the explanation . But i still have no idea which ligament i got tore . @ Hudson : how could u spend 4 months pretending like nothing happen ? Could you still walk like normal ? or limping ? As for me , i could not get my knee straight or bend it at all . @ Aodhan : Yes , at first the doctor thought it was a meniscus tear , but after the operation , i was told it was actually a ligament tear and not meniscus .