These are invisible, custom made, computer generated and fabricated aligners, which are changed every 2 weeks to cause movement of teeth. It involves the use of the latest advances in 3 D computer generated technology by which these aligners are manufactured .Your orthodontist is the best person to evaluate whether your case can be treated by aligner or not in order to avoid any failures. These aligners have to be worn throughout the day except when you eat, brush or floss your teeth