You wear each set of aligners for about two weeks, removing them only to eat, drink, brush, and floss. As you replace each aligner with the next in the series, your teeth gradually straighten to the final position your doctor has prescribed. You'll visit our practice about once every six weeks to ensure that your treatment is progressing as planned. Total treatment time typically lasts nine to 15 months, and the number of aligners worn during treatment is between 18 and 30.