Causes
A knee fracture mostly happens after a sudden fall, which exerts direct pressure on the kneecap. These include physical activities, sports, and accidents. Because of the direct trauma, there might be damage to the overlying skin. Also, the restricted amount of soft tissue can make it become an open fracture. The problem can also occur as the quadriceps muscle contracts but the knee joint straightens at the same time. This is known as eccentric contraction. As the muscle forcefully pulls in this way, the knee could fracture. [2]
