Hip abduction orthoses help control your hips by limiting their movement. They consist of a pelvic girdle, a hip orthosis thigh component, and an adjustable hip joint. The most common use for hip orthoses in adults is chronic hip instability. Newborns and infants who suffer from developmental dysplasia also need hip orthoses, as do children with Perthes disease, a rare bone degeneration caused by the inadequate blood supply. Orthotists and orthopedic surgeons will choose and fit the proper hit orthosis for you. Unless instructed otherwise, you should wear it all the time.