Teeth will always want to go back to where they were because your gums, bones and teeth have a "memory" of where they started. This is why Dr. Hank ensures you have a final retainer to help keep your teeth in their new, aligned position. The final retainers are to be worn at night indefinitely in order to guarantee maintaining a straight smile.
Unless you wear the final retainers each night, your teeth could start to shift back to their original position. After a few years of nightly wear, you may find yourself able to reduce wearing your final retainers to one or two nights per week and maintain your corrections indefinitely.
There are fixed, or permanent retainer options available for patient's to maintain their straight teeth after Invisalign treatment is completed. Dr. Hank will inform patients of the array of retainer options available, and determine which option is best for each individual case.