Orthodontic info
Can my orthodontist tell if I have not been wearing my aligners enough?
Yes, in part: your orthodontist can evaluate how your aligners fit and whether your teeth are moving as planned, and the American Association of Orthodontists (AAO) says that when treatment is not tracking as expected, aligner wear may be one factor the orthodontist considers.
On this page
A tray that stops fitting is a sign for your orthodontist to evaluate, not proof of how many hours it was worn: teeth can fall behind an aligner plan for reasons other than wear.
Fit and movement are the evidence
Aligners move teeth only while they are in your mouth, so missed wear can show up as fit: the next tray meets teeth that are not where the plan expected them. The match between teeth and trays is called tracking, and the practice's post on how long Invisalign takes explains what it means for a timeline.
A tray that stops seating is a sign, not a verdict
A tray that no longer seats fully gets a closer look, yet the AAO says that when treatment is not tracking as expected, aligner wear “may be one factor” the orthodontist considers. In a 2021 study by Patterson and colleagues in the American Journal of Orthodontics and Dentofacial Orthopedics, Invisalign achieved some tooth movements but not others predictably in 80 adults with no known compliance issues.
When teeth stay behind the plan, your orthodontist may design a new series from where the teeth are, a step the Invisalign refinements page walks through.
What wear indicators can and cannot show
A 2011 study found the Invisalign Teen indicator gives an estimate of wear, not an objective measure. The practice's Invisalign Teen page describes the Blue Dot indicator, and that study, by Schott and Göz in the Angle Orthodontist (opens in a new tab), reports the manufacturer's account: a food dye in the aligner is released in the presence of oral fluid, so the dye loss corresponds with the time the aligner was worn.
Tested outside the mouth, the indicator color faded with time, pH and temperature. Schott and Göz conclude that indicators “can best show an estimate of wear time but cannot be recommended as objective wear-time indicators.” The same authors call it a dilemma when aligners no longer fit although their indicators have faded: the fit and the indicator can disagree.
Why the AAO says to tell your orthodontist
The AAO's advice is direct: if you have not been wearing your aligners as instructed, “it is best to say so.” In a Progress in Orthodontics study, Castroflorio and colleagues (2023) relied on patients' honest reports of compliance, confirmed verbally at each appointment, and list the lack of an objective, reliable measure as a limitation.
An honest account helps your orthodontist weigh what a tray that stopped fitting means: a wear problem, a movement the teeth have not made yet, or both.
When a tray stops fitting between visits
Call the office when a tray stops seating fully; Align, the maker of Invisalign, tells patients who are unsure about fit to reach out for support. How many hours a day to wear your aligners and when to change them are set by your orthodontist, as the Invisalign treatment page states. Between visits, Carvalho & Roth Orthodontics uses remote dental monitoring to check on Invisalign patients through photos sent from an app.
Questions
Frequently asked questions
Should I move to my next aligner early if the current one stops fitting well?
No, not on your own: the AAO says aligners should be worn in a particular sequence, and your orthodontist sets the change schedule, so a tray that stops fitting well is a reason to call the office, not to skip ahead.
Can drinks or cleaning make a wear indicator fade?
Yes, in testing outside the mouth: a 2011 study in the Angle Orthodontist found indicator color faded in drinking water and acidic soft drinks and with cleaning tablets and a dishwasher, so fading alone is not proof of wear.
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