Aligners are clear, thin, plastic-like trays that are formed to fit an individual’s teeth. Patients are responsible for putting in and removing their aligners. A series of aligners is created to move teeth. Each aligner is worn for 2-3 weeks, and moves teeth a fraction of a millimeter at a time. Patients must remove aligners for meals and when brushing/flossing. The number of aligners needed to correct misaligned teeth varies based on the individual’s orthodontic problem and its correction.