Sometimes you need to go backward to move your treatment forward. If your treatment has moved off track due to improper aligner compliance or improper aligner fit, consult your orthodontist about the prospect of 'backtracking' treatment. Backtracking occurs when a patient is ordered to wear their previous aligner tray longer than originally scheduled. Doing this can make a meaningful difference in solving incisal gaps, incomplete tooth movements, or ill fits. Your orthodontist and aligner manufacturer can make replacement trays remade from the last impression in your treatment sequence.