Both colles fractures and smith fractures, which usually refer to fractures of the distal radius, are called by different names depending on the circumstances and mechanism of the injury and the displacement of the fracture, respectively. If the distal radius is fractured as a result of an accidental fall and the palm of the hand is propped up on the ground, the distal end of the fracture is displaced dorsally, which is called a colles fracture. If you fall and land on the back of your hand first, resulting in a fracture of the distal radius with the fracture end displaced to the palmar side, this is called a smith fracture. The treatment is similar and usually involves repositioning by manipulation and external fixation with a splint or cast, but if the repositioning is unsuccessful an incision must be made for internal fixation with a plate.