Invisalign is a tooth alignment process, much like braces, that gradually straightens your teeth and aligns your bite. It involves a series of clear plastic aligners that are worn for 1 to 2 weeks each, before switching to the next aligner set in the treatment series. The clear aligners apply slow, gradual pressure on the teeth in strategic areas to change the positioning. “Attachments” are bonded onto some tooth surfaces to allow the aligners to have traction when moving the teeth. Invisalign treatment, on average, takes around 18 months, but each case is different, and the more complex the case is, the more time that may be needed.