Hyperextension Braces are braces usually designed for purposes of preventing the spine from moving forward. However, they still allow trunk rotation as well as movement from one side to the other. Hyperextension spinal braces are used for people with compression fractures of the upper lumbar and the lower thoracic spine. The brace will put pressure on the chest and the pelvic bone. By so doing, it will ensure that the spine is always in the extended position.