How to Tell if Your Invisalign Trays Fit Correctly

Throughout my years as an orthodontist, it has always felt rewarding to watch my patients undergo successful clear aligner therapy. Part of my job involves ensuring that my patients are set-up for success. The process of straightening one’s teeth is lengthy and costly, after all. We both want to achieve our intended results. However, poor or misfitting invisible aligners are glaring roadblocks to this path. That’s why it is important to double-check and ensure your Invisalign trays properly fit. If not, you may need to look into purchasing Invisalign attachments or buttons.

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Check the Tracking of Your Aligner With Your Teeth

If You Find Poor Tracking Between Your Teeth and Aligner, it May Not Fit Properly

One of the simplest methods for checking whether your Invisalign trays have stopped fitting properly is to track them with your teeth. Teeth tracking simply means checking how well the invisible trays align with the bottom or top of your teeth. You can perform quick check-ups throughout your treatment plan.

Trays with excellent or good tracking will align closely with the outline of your teeth. Below average or poor tracking trays do not fit as smoothly. Small gaps are observed between your teeth and the trays.

Causes of Poor Tracking

There are a variety of causes behind poor tracking. While it can be frustrating to realize that your teeth aren’t moving as quickly as you wish, it is important to consider what might be causing this disruption.

  • Your teeth need some extra help in the form of Invisalign attachments or buttons
  • You aren’t wearing your Invisalign trays for the proper amount of time
  • You are forgetting to complete your chewing exercises

Make Sure the Invisalign Trays Fit Snugly

Loose or Tight Trays are Uncomfortable But Can be Fixed by Invisalign Attachments or Buttons

Invisible trays follow the Goldilocks rule — they shouldn’t be too tight or too loose. However, patients should remain aware that aligners tend to feel a little tight at first.

There should be no gaps between the trays and the incisal edges of the teeth. Gaps typically indicate that the trays are too big or too little. The formation of these gaps is usually caused by inaccurate impressions or the teeth’s inability to expand or move at the expected rate. Many patients purchase Invisalign attachments or chewies to fix these gaps.

Should you face increased comfort or you simply need extra assistance in dealing with this discomfort, do not hesitate to reach out to your orthodontist with questions.

Common Causes for Fitting Issues With Invisalign

There are Several Possible Causes Behind Improperly Fitting Invisalign Trays


Sometimes your teeth just don’t move as quickly as your orthodontist expected. Other times, when patients do not wear their aligner trays for the recommended period of time, they can also gradually stop fitting. However, most of the time, an invisible tray does not fit comfortably due to a recent change in the formation of the mold.

While improper tooth movement can contribute to the formation of ill-fitting aligners, so too can successful tooth movement. For instance, if you have worn your aligners for a while and they begin to feel loose, that could mean it’s time to move onto the next set. When you start wearing a new set, you might have a harder time snapping the new trays into place. This is normal. To ease discomfort, many patients place Invisalign attachments to their teeth.

What to do if Your Invisalign Doesn’t Fit Properly

Patients Have a Variety of Solutions to Choose From, Including Invisalign Attachments


If you end up determining that your Invisalign trays do not fit properly — do not panic. There are a variety of inexpensive and easy solutions to correct the fit of your trays and lower any discomfort that might result from them.

Try Out Invisalign Attachments, Chewies, or Mints

Invisalign attachments are small, yet sturdy pieces of material made from composite resin, a substance that is also used for teeth fillings. Users place these Invisalign attachments to their teeth in order to give the clear trays the extra grip needed to move their teeth. You can also try Invisalign “chewies,” which are essentially small pieces of foam that you chew on to force the aligners over your teeth.

If chewing on foam doesn’t sound appetizing to you, try Dental Movemints designed for clear aligners instead. Not only can Dental Movemints help you keep your aligners in place, but they can also help you get rid of stale breath and keep your aligners on for the required 20 hours every day.

Keep Better Track of How Long You are Wearing Your Trays

Remember that you need to wear your Invisalign trays for at least 20 to 22 hours a day. Forgetting to do so can prevent you from moving forward with the treatment in a timely manner. Try to remove your trays to eat, drink, brush your teeth, and clean your aligners only.

Inquire About “Backtracking” to an Old Tray

In extreme cases, you might have to backtrack to one of your previous sets of aligners. This usually occurs when patients cannot get their trays to fit even with the help of attachments, mints or chewies. Before doing this, however, you must consult with your orthodontist for guidance.


Are you ready to attack your Invisalign attachment issues head-on? Check out Movemints — mints designed to fit at-home straightening solutions and seat trays — to learn more about how Invisalign attachments can assist you throughout your treatment. For years, customers have enjoyed Movemints to promote dental health and to utilize it as a safe alternative to the chew foam available on the market.


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