Commonly, an orthosis or some sort of brace might be required after a physical trauma. An example would be a neck brace used to support and immobilize the neck after sustaining an injury like whiplash from a car accident. An orthosis may also be utilized post-surgically; for example, after knee surgery, to provide stability, support the area, and reduce the external forces applied to the knee, thereby allowing the area to heal and potentially preventing injury reoccurrence. Talk to your doctor if you have a physical condition affecting your mobility, and see if an orthosis can be helpful to you.