Invisalign has revolutionized orthodontic care by offering a discreet, comfortable, and convenient way to straighten teeth without traditional metal braces. For most patients, the treatment goes smoothly and delivers beautiful results. However, like any dental procedure, Invisalign isn’t completely risk-free. While the benefits far outweigh the drawbacks for most people, it’s still important to know what could go wrong and how to prevent it. Here are 5 possible complications with Invisalign to keep in mind before and during treatment.
1. Discomfort and Soreness
Even though Invisalign aligners are smoother and less irritating than braces, they still apply gentle pressure to move your teeth which can cause mild discomfort, especially when switching to a new set of trays. You may notice soreness when biting or tenderness in your gums and cheeks for a few days.
This is a normal part of the adjustment process, but if the pain feels severe or persists for more than a week, it’s worth contacting your dentist or orthodontist. Using orthodontic wax on sharp tray edges and sticking to soft foods during the first few days of a new aligner can help ease discomfort.
2. Speech Difficulties
Some Invisalign wearers experience a temporary lisp or difficulty pronouncing certain words when they first start treatment. This happens because the aligners slightly alter the space inside your mouth, affecting how your tongue touches your teeth during speech.
The good news? Your tongue quickly adapts. Most people notice improvement within a few days to a week. Practicing speaking aloud—especially reading or singing—can help you get used to your aligners faster.
3. Dry Mouth and Bad Breath
Wearing Invisalign trays for the recommended 20 to 22 hours per day limits airflow in your mouth, which can lead to dryness. A dry mouth creates the perfect environment for bacteria to thrive, increasing your risk of bad breath or even gum irritation.
To avoid this, make sure to stay well-hydrated and clean your aligners regularly. Rinse your mouth after eating, and brush both your teeth and trays before putting them back in. Chewing sugar-free gum or using mouthwash can also help stimulate saliva and keep your breath fresh.
4. Aligner Fit Issues
Sometimes, Invisalign trays may not fit properly, especially if you’ve skipped wearing them for a few days or if your teeth move slower than expected. Poorly fitting aligners can reduce treatment effectiveness or cause unnecessary pressure on certain teeth.
If your trays feel loose, tight, or uneven, let your orthodontist know immediately. They may recommend using “chewies” (soft silicone cylinders that help seat your aligners correctly) or adjust your treatment plan to get your progress back on track.
5. Risk of Tooth Decay or Gum Problems
Invisalign aligners can trap food particles and bacteria against your teeth if not cleaned properly. This can lead to plaque buildup, cavities, or even early gum disease. Since the trays cover your teeth most of the day, maintaining excellent oral hygiene is critical.
Always remove your aligners before eating or drinking anything besides water, brush and floss before reinserting them, and clean the trays daily. Your dentist may also recommend fluoride mouthwash for added protection.
While Invisalign offers a comfortable and effective way to achieve a straighter smile, being aware of potential complications helps ensure a smoother journey. Regular dental checkups, good hygiene habits, and following your dentist’s instructions can prevent most of these issues. With the right care, your Invisalign experience can lead to the confident, healthy smile you’ve always wanted.
About the Author
Dr. Mike Rudolph has practiced dentistry for more than 30 years, 15 of them spent in Warsaw. He graduated from the Maryland School of Dentistry and then served in the U.S. Navy for 7 years, 2 of which were spent onboard the USS Midway. In 2014, Dr. Rudolph was selected Department of Microbiology Alumnus of the Year. He stays current in his field through memberships in the Kosciusko County Dental Society, the Indiana Dental Association, and the American Dental Association. If you’re interested in orthodontic care, schedule an appointment with us online or call (574) 269-1787.