plaster splint

plas·ter splint

a splint constructed of bandages impregnated with plaster of Paris.
References in periodicals archive ?
After the operation, an elastic bandage and plaster splint are applied over the knee to keep it stable.
At the conclusion of the surgery, a plaster splint, wrapped with a bandage, was applied from the patient's foot to just below her knee.
The elbow was immobilized in a long-arm plaster splint for 3 weeks.