Braces are orthodontic appliances that are used to move teeth to a corrected position. They can be made of metal and ceramic. By placing a constant, gentle force in a carefully controlled direction, braces slowly move teeth to improve their alignment and bite. Braces are typically worn for a period of one to three years, depending on the severity of the problem being corrected, and the patient's diligent use of any prescribed rubber bands is an important factor in achieving the most efficient treatment.