Intramedullary pins and intramedullary nails are probably the same thing, because some intramedullary pins, such as those in the tibia or humerus in children, are called flexible intramedullary pins, which are actually a type of intramedullary nail, but they are called by different names. Intramedullary pins are used for a variety of fractures, such as tubular fractures of long bones, tibial fractures or femoral fractures, etc., which can be fixed with an intramedullary nail. Intramedullary nailing is a concentric fixation and allows for early postoperative mobilization if the bone quality is very good, and early mobilization promotes fracture healing. In addition, the rate of fracture and plate breakage is lower with intramedullary nailing than with plate eccentric fixation, so intramedullary nailing is a better fixation method to promote patient recovery and prevent the possibility of fracture and plate breakage.