What To Do When Your Aligners Don’t Fit?

Clear aligners are a convenient way to straighten teeth, but sometimes they don’t fit properly. If your aligners feel too tight, too loose, or won’t sit correctly, it can be frustrating. The good news is that ill-fitting aligners are pretty common and usually fixable.

A proper fit is necessary for aligners to shift properly and guide your teeth into the desired movement. If they don’t fit correctly, your treatment progress may slow down, or your teeth may not move as planned.

Whether you’re dealing with aligners that won’t go all the way on, feel uncomfortable, or seem loose, this guide will help you understand why it’s happening and what you can do about it.

If your aligners still don’t fit after trying these solutions, Smilebliss can help adjust your treatment plan and ensure your aligners fit properly.

Signs That Your Aligners Don’t Fit Correctly

Your aligners should fit snugly over your teeth with no visible gaps.

If something feels off, here are some signs that indicate an improper fit:

• Gaps between the aligner and teeth: If there’s a noticeable space, the aligner isn’t seated properly.
• Aligners won’t go on completely: They should snap into place without forcing them.
• Tightness or discomfort: Some pressure is normal, but excessive pain could mean the aligners don’t fit correctly.
• Feels loose or falls out: Aligners should stay secure when worn.
• Bite feels off: Uneven pressure when biting may indicate the aligners aren’t positioned correctly.

If you’re experiencing any of these problems, it’s time to determine the cause and find a solution.

Why Your Aligners Don’t Fit

There are several reasons why clear aligners may not fit properly. Some issues are easy to fix, while others may require professional adjustments.

Not Wearing Your Aligners for the Recommended Amount of Time

Aligners should be worn 22 hours a day to maintain progress. If they aren’t worn consistently, your teeth may not move as planned, causing the new set of trays to feel tight or not fit at all.

Skipping days or removing them for too long can disrupt the treatment plan and create a poor fit when transitioning to a new tray.

Switching to a New Set Too Soon or Too Late

Each aligner set is designed to be worn for a specific amount of time before moving to the next stage.

• Switching too soon: The new trays may feel tight and won’t fit properly.
• Waiting too long: Teeth may start settling into the previous position, leading to an improper fit.

Sticking to the recommended schedule helps maintain consistent tooth movement.

Warped Aligners Due to Heat Exposure

Aligners are made from thermoplastic material, which can warp if exposed to heat. If you’ve rinsed them in hot water, left them in a hot car, or placed them near direct sunlight, they may have lost their shape. Even slight warping can make them useless since they won’t fit properly.

Teeth Aren’t Moving as Expected

Sometimes, teeth don’t shift exactly as planned. Some move faster, while others take longer. If a particular tooth resists movement, the new aligners may not fit correctly. In these cases, minor adjustments to the treatment plan may be needed.

Not Inserting Aligners Properly

Aligners should be seated properly over your teeth. If they aren’t fully in place, it could be due to air pockets or improper handling. Chewies can help push them into position and create a snug fit.

What To Do If Your Aligners Don’t Fit

If your aligners don’t fit, don’t worry. Here’s what you can do to fix the issue.

Try Re-Seating the Aligners Properly

Sometimes, aligners need extra pressure to fit correctly. Chewies—small foam rolls designed for this purpose—can help remove air gaps and ensure a snug fit.

Simply bite down on a chewie for a few minutes to help aligners fit correctly over your teeth.

Wear the Previous Set for a Few More Days

If your new aligners don’t fit properly, try wearing the previous set for a little longer. This allows your teeth more time to adjust before moving forward. After a few extra days, try the new set of trays again and see if they fit better.

Check for Damage or Warping

Inspect your aligners for cracks, bends, or misshapen edges. If they don’t fit correctly, they may have been damaged or exposed to heat. A replacement set may be necessary if warping has occurred.

Maintain Good Oral Hygiene

Poor oral hygiene can lead to plaque buildup, making aligners feel tight or uncomfortable. Make sure to:

• Brush and floss before inserting aligners to keep teeth clean.
• Clean aligners properly to prevent bacteria buildup that could impact fit.
• Rinse aligners regularly to remove food particles and debris.

When to Reach Out for Help

If your aligners still don’t fit after a few days, don’t wait too long to ask for help.

Here are situations where contacting your orthodontist is the best course of action:

How to Prevent Aligner Fit Issues

Avoiding aligner problems in the first place is the best way to stay on track.

Here are some tips to help:

• Stick to the wear schedule. Always wear aligners 22 hours a day as instructed.
• Don’t skip trays. Follow the sequence and don’t jump ahead.
• Keep them away from heat. Never expose aligners to hot water, direct sunlight, or high temperatures.
• Store them safely. Always use the protective case when they’re not in your mouth.
• Use chewies regularly. Biting on chewies for a few minutes each day helps aligners fit better.

Smilebliss: Helping You Get the Best Fit for Your Aligners

If your aligners don’t fit properly, Smilebliss is here to help. Our team provides expert guidance, adjustments, and support to ensure your treatment stays on track. Whether you need a new set of trays, minor adjustments, or professional advice, we’ve got you covered.

Schedule an appointment today and keep your aligner treatment moving forward!