Invisalign is a proven system & leading brand for a device that uses clear aligners to move the teeth into position. These aligners are made of plastic that looks virtually invisible when in the mouth. These aligners are custom-designed for your mouth, using a high-tech computer system that designs the way your teeth need to be moved. You will use a series of aligners, and each set is usually worn for two to three weeks before moving onto the next set of aligners in the series. Aligners will be worn for between a year and a year and a half, according to your needs.