What is the name of the thing fixed outside after the fracture?

Traditional gypsum bandages and splints are mainly based on the fact that when raw gypsum is heated to 107~ 130℃, it loses 3/4 of crystallization water, that is, plaster of Paris, which can be rapidly recrystallized and hardened when it meets water. After plaster shaft fixation, it can be used as external fixation after fracture. For a long time in the past, due to the limited level of science and technology, plaster bandage and plaster splint have been the first choice for orthopedic external fixation. However, with the development of science and technology, Anxin polymer bandage splint made of synthetic polymer materials has gradually replaced gypsum external fixation products and is widely used in orthopedic external fixation.