Unlike traditional braces, patients can remove Invisalign® trays at any time. The ability to remove the trays makes oral hygiene measures substantially easier. However, since patients can remove the aligners, they may not wear the appliances for the specified amount of time each day. Inadequate wear time can prolong treatment.
For Invisalign® treatment to be effective, a patient must wear aligners 20-22 hours a day. Ideally, a patient only removes the aligners for eating and oral hygiene routines. With this system, the patient wears a set of aligners for one to two weeks, then switches to the next set of trays to continue the tooth movement. If the new aligners do not fit, the patient has not worn the previous set enough each day. Treatment is much smoother when the patient is diligent about wearing aligners.