After this point, most patients can stop wearing the retainer during the day. Instead, they will only have to use it at night. This will usually need to be done for 12 months after Invisalign treatment has ended. When a person wears a retainer, they train their newly straightened teeth to stay in their new alignment.
The retainer gives your teeth the time they need to “heal,” like a pole that needs support until the cement that supports it dries. Invisalign uses a series of clear aligners to straighten your teeth for a period of 12 to 18 months. According to your cosmetic dentist, you'll need to wear retainers after removing the final tray.