Invisalign® is a way to straighten your teeth without braces – a nearly invisible tooth realignment system. It uses a series of hard plastic, computer-designed mouthguard-like trays, each giving incremental movement towards the desired result. If you’ve wanted to straighten your teeth, but haven’t wanted braces, you may want to look into Invisalign®. Total treatment time averages 9-15 months and the average number of aligners worn during treatment is between 18 and 30, but both will vary from case to case.