Invisalign® is the revolutionary way to help you get even, straight teeth without noticeable, painful metal braces. Virtually undetectable, Invisalign® aligners are made of strong, clear plastic that gradually guide your teeth into perfect alignment. Unlike metal braces, they have no wires or brackets. Tooth impressions are made, from which Invisalign™ develops customized aligners that will slide directly over your teeth. Aligners are typically worn full-time (except when eating or drinking) for 12 to 48 months — no longer than you would wear traditional metal braces. Aligners are replaced every two weeks as your teeth shift into place.