The knee is the largest joint in the body. It is comprised of four main components: bones, cartilage, ligaments, and tendons, any which of can become damaged and result in pain. Some of the most common causes of knee damage are:
– Fractures around the knee. The most common bone broken around the knee is the patella. The ends of the femur and tibia where they meet to form the knee joint can also be fractured.
– Dislocation. A dislocation occurs when the bones of the knee partially or completely slip out of place. Dislocations can be caused by an abnormality in the structure of the knee or by trauma, such as falls, motor vehicle crashes, and sports-related accidents.
– Knee bursitis. Some knee injuries cause inflammation in the bursae, the small sacs of fluid that cushion the outside of the knee joint.
– Patellar tendinitis. This is an irritation and/or inflammation of one or more tendons that attach the quadriceps muscles on the front of the thigh to the shinbone. Runners, skiers, cyclists, and those involved in jumping sports are prone to developing inflammation in the patellar tendon.
– Meniscus tears
– Ligament and tendon tears
– Osgood-Schlatter disease, an inflammation of the area just below the knee where the tendon from the kneecap (patellar tendon) attaches to the shinbone (tibia).