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Upper-limb arm orthoses designed to support to the forearm by providing soft-tissue compression to maintain alignment and stabilization of the ulna (one of the two forearm bones). They permit movement of the adjacent joints (i.e., wrist and elbow). These orthoses typically consist of sleeves of fabric or other soft material that are tightened on a layer of stockinette previously placed on the forearm and that may include metallic or hard plastic stays. Some orthoses consist of clam-shell (i.e., bi-valved devices) that allow an easier adjustment during the period of use. Upper-limb forearm orthotic braces (also known as functional braces) are used instead of rigid casting to treat specific types of closed fractures of the ulna during rehabilitation.
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