The knee joint is formed by three bones: the femur (thighbone), the tibia (shinbone), and the patella (kneecap). These bones are held together by ligaments, which are strong bands of tissue that keep the joint stable while an individual is walking, running, jumping, etc. There are two types of ligaments in the knee: the collateral ligaments and the<unk>  ligaments. The collateral ligaments include the medial collateral ligament (along the inside of the knee) and the lateral or fibular collateral ligament (along the outside of the knee). These two ligaments function to limit sideways movement of the knee. The<unk>  ligaments form an "X" inside the knee joint with the<unk><unk>  ligament running from the front of the tibia to the back of the femur, and the posterior<unk>  ligament running from the back of the tibia to the front of the femur. The<unk><unk>  ligament prevents the tibia from sliding out in front of the femur and provides rotational stability. There are also two C-shaped structures made of cartilage called the medial meniscus and lateral meniscus that sit on top of the tibia in the knee joint and serve as cushion for the bones. 155px 300px Right knee, front, showing<unk>  ligaments Left knee, behind, showing<unk>  ligaments
Anterior cruciate ligament injury
Tibial plateau fracture
Posterior cruciate ligament injury
Knee dislocation  Knee dislocation  1
Medial knee injuries
Pes anserine bursitis
Patellar dislocation
Patellar subluxation syndrome