A device applied externally to support and align a limb, also called an orthosis, may help prevent or correct deformities. What is this device called?

• A. Cast
• B. Orthotic Device
• C. Brace
• D. Splint

Answer: (B)

External devices that support and align a limb to prevent or correct deformities are called orthoses, or orthotic devices. This term covers the whole family of external supports used to guide growth, reduce deformity, or improve function. A cast is for immobilizing an injury like a fracture, not primarily to align deformities. A splint is usually a temporary immobilizer, and a brace is a specific type of orthosis used to provide support or limit motion. Since the scenario describes the general external support to align and prevent deformities, the precise term is orthotic device.