There are two principles of fracture repositioning, one is to achieve an anatomical repositioning and the other is to achieve a functional repositioning. Anatomic repositioning is to place the fractured and displaced bone in exactly the same place as before. If the bone is misaligned by 2 cm after the fracture, or by 1 cm or 2 cm after the misalignment, restoring the fracture to its previous zero misalignment is called anatomic repositioning. Anatomic reduction is the principle of anatomic or ideal state of reduction. Another principle is functional reduction. Functional reduction is a surgical or manipulative procedure that does not achieve complete anatomical reduction, but restores most of the function. If the fracture is misaligned by 3cm and repositioned by 2cm, the bone can be repositioned by more than 2/3, i.e., 2/3 of the bone is restored to its previous position, then functional repositioning can be achieved, which is the standard of functional repositioning and the principle that orthopedic surgeons need to follow when treating fractures.