Even after the teeth have reached their new, healthier position, there is a danger that they will shift back into their old spaces. This means the months and money spent correcting the teeth would be for naught. A retainer can ensure they remain in their intended places. Invisalign even makes a special retainer similar to their aligners.
Your expert in Invisalign retainer in Orange County will likely instruct patients to wear their retainers twenty-four hours a day for a week or two. After a check-up appointment to see if the teeth have remained in place, they may allow the retainers to be worn less frequently, such as only at night.
Over time, if the teeth do not show any unwanted signs, a retainer might be considered unnecessary. However it is more likely that patients will need to wear their appliances at night for the unforeseeable future.