Broken wrist. X-ray of the hand of a patient with a fractured scaphoid bone (white, centre left) that has failed to heal. The scaphoid bone is one of the carpel bones, which articulate with the bones of the forearm, the radius (bottom left) and ulna (bottom right), to form the wrist joint. The bone will need to be reset and immobilised, either externally, using a cast, or internally, using metal pins, to allow it to heal properly. It is important that a bone heals properly to avoid future complications.