The name of a medical specialist who creates spine or leg braces to help correct an issue is called a chiropractor.

Actually, the medical specialist you are referring to is called an orthotist. An orthotist is a healthcare professional who specializes in designing, fitting, and fabricating orthoses, which are devices such as braces, splints, or shoe inserts that are used to support, align, or correct musculoskeletal or neuromuscular issues. Chiropractors, on the other hand, primarily focus on the diagnosis and treatment of problems related to the spine, nervous system, and musculoskeletal system through manual adjustments and manipulations.