There are four types of fracture displacement: first, lateral displacement, which refers to the displacement of the distal end of the fracture in four directions: forward, backward, left, and right, and is called lateral displacement. Second, overlap displacement, which is the overlap between the distal and proximal ends after the fracture is completely misaligned, and the amount of overlap is calculated in centimeters. Third, angular displacement, after the fracture occurs, the proximal axis of the fracture becomes a certain angle with the distal axis of the fracture, and the amount of the angle is expressed in degrees. Fourth, rotational displacement, after the fracture occurs, the distal end of the fracture is rotated and displaced clockwise or counterclockwise, and the amount of rotation is also expressed in degrees.