A back brace for thoracic back pain generally has a couple different requirements for it to be considered a TLSO, or thoracic lumbar sacral orthosis. For one the posterior (back) of this brace needs to extend from the sacrococcygeal junction and terminate just below the scapular spine. The anterior (or front) of these back braces must extend from the symphysis pubis to either the sternal notch or zyphoid process.
These braces will limit and control a patient in three planes. A TLSO will limit a patient's ability to twist, bend forward and backward, and bend side to side. The bigger the brace the more control. Patients should only be fit with these orthopedic devices by certified practitioners.