Objective as the most important stable factor in knee joint,anterior cruciate ligaments can direct and limit the movement of knee joint.

• 前交叉韧带是膝关节最重要的稳定因素；对膝关节起着导向和限制作用.；前交叉韧带断裂可以导致严重的关节不稳；从而严重影响运动功能;