An orthosis (plural: orthoses) is the medical term for supports commonly known as braces or splints. An orthosis is a type of device used to support or correct the behaviour of a body structure. This may be due to disease, injury, or structural change to a joint or body segment. An orthosis could be used to support almost any body structure. Common devices include foot orthoses (“orthotics”), knee braces, neck collars, and fracture casts. An orthosis might be fitted to delay or prevent surgery, or provide support where surgery and other interventions might be inappropriate or undesirable.