Radial head fracture is classified according to the Mason classification as four types of fractures. ![]() There often are associated injuries, which must be taken into account during the initial diagnosis and further treatment. Radial head fracture is not just a bone injury. The carpal bones may also break during the fall.The solid fibrous capsule connecting the ulna and radius along the entire length may also be torn.Other collateral ligaments, the annular ligament and the joint capsule may be injured.The most common injury is to the lateral collateral ligament, which supports the joint capsule of the elbow.Injuries associated with a radial head fractureĪbout every third of the patients with a radial head fracture will also have injuries to the ligaments or bone structure. In addition, hand function may be impaired. If the radial nerve is injured, paraesthesia will appear in the hand. While nerve damage is rare, even in serious injuries. Likewise, the fall can also damage the other two bones in the joint (humerus and ulna). ![]() If the fractured radial head is displaced (dislocation), joint mobility can even be completely blocked. The fracture often causes blood to seep into the joint, which further limits mobility in the elbow. If the fracture is accompanied by swelling with bruising around the elbow, this can be a sign of capsule or ligament injuries. Turning the forearm inward and outward as well as extending and bending the elbow is very painful. Pressing on the respective radial head causes severe local pain. Turning the forearm inward and outward is painful and limited, and the individual is often unable to fully bend and straighten the joint. Typical symptoms of a radial head fracture are pain and swelling on the outside of the elbow.
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