5 Possible Complications with Invisalign

Invisalign has become a popular choice for straightening teeth thanks to its clear appearance, removable trays, and comfortable design. While many people complete Invisalign treatment with great results and minimal issues, it’s important to understand that, like any dental or orthodontic procedure, complications are possible. Knowing what to watch for can help you stay informed, manage expectations, and take proactive steps to avoid delays or discomfort during your treatment. Here are 5 of the most common complications or challenges associated with Invisalign.

1. Discomfort and Soreness

Although Invisalign trays are generally more comfortable than metal braces, mild discomfort is normal, especially when switching to a new set of aligners. The trays are gently moving your teeth, which can cause pressure or soreness for a few days.

What to do: This usually resolves on its own, but cold compresses, over-the-counter pain relief, or “chewies” (small rubber cylinders that help seat the trays) can provide relief.

2. Speech Changes

Some patients experience a slight lisp or change in speech when they first begin wearing aligners. This is usually temporary as your tongue adjusts to the trays.

What to do: Practice speaking out loud or reading aloud to get used to the feel of the aligners. Most people adapt within a few days.

3. Aligners Not Fitting Properly

If you skip wearing your trays for the recommended 20 to 22 hours per day or jump ahead in your aligner schedule, the next set may not fit correctly. Gaps between the teeth and the trays, or a feeling that the aligners are too tight, are signs that your teeth haven’t moved as expected.

What to do: Contact your orthodontist. You may need to wear a previous set longer or have a new set created. Always follow the prescribed schedule closely.

4. Gum or Soft Tissue Irritation

While the smooth plastic of Invisalign trays is designed to be gentle, some people may experience irritation on their gums, tongue, or cheeks, especially during the first few days.

What to do: Use orthodontic wax on rough edges or ask your orthodontist to smooth out any problem areas. A warm saltwater rinse can also soothe irritated tissue.

5. Allergic Reactions or Sensitivity

Though rare, some people may experience a mild allergic reaction to the plastic material in the aligners. Symptoms may include redness, itching, or swelling.

What to do: If you notice these signs, discontinue use and consult your dentist or orthodontist immediately.

Preventing Complications

Most Invisalign complications are minor and temporary. You can minimize risks by:

• Wearing your aligners for the full recommended time.
• Cleaning them regularly.
• Keeping your dental checkups.
• Following your provider’s instructions exactly.

Invisalign is a safe, effective, and convenient way to straighten teeth for many people. While complications are possible, they’re usually minor and easily managed with guidance from your orthodontist. Staying informed and proactive throughout your treatment can help ensure a smooth experience and a beautiful, healthy smile at the end of your Invisalign journey.

About the Author

Dr. Bradford Plasha graduated from the Rutgers School of Dental Medicine, where he also completed an externship in prosthodontics. He has done extensive training in dental implants and is a Fellow of the International Dental Implant Association. Dr. Plasha has stayed current in the field through ongoing education efforts and professional memberships in organizations like the American Dental Association and the Pennsylvania Dental Association. If you’d like to get Invisalign treatment to straighten your smile, our team of professionals would be glad to serve you. Schedule your appointment online or call (484) 854-6900.