Invisalign aligners are designed to be discreet, comfortable and convenient. For many patients, the treatment process is smooth and relatively easy to adjust to. However, one common side effect that some people experience is dry mouth.
If you have started Invisalign and noticed your mouth feels unusually dry, sticky or uncomfortable, you are not alone. Invisalign dry mouth is a known and manageable symptom that can occur, especially in the early stages of treatment.
In this guide, we explain why dry mouth can happen with Invisalign, what you can do to relieve it, and when to seek support from your dental team.
What Is Dry Mouth?
Dry mouth, or xerostomia, occurs when your salivary glands do not produce enough saliva to keep your mouth properly moisturised. Saliva plays an important role in keeping your mouth healthy. It helps with digestion, protects your teeth from decay, and keeps your soft tissues hydrated.
A dry mouth may feel:
- Sticky or uncomfortable
- Accompanied by bad breath
- More prone to plaque or gum irritation
- Sensitive when eating or speaking
Can Invisalign Cause Dry Mouth?
Yes. Invisalign can contribute to dry mouth, particularly in the first few weeks of wear. The aligners cover the teeth and act as a barrier between your saliva and the surfaces of your teeth and gums.
This can temporarily reduce natural saliva flow and make your mouth feel dry, especially if you are not drinking enough water.
Dry mouth may also be more likely if you:
- Wear your aligners for long periods without breaks
- Are not staying hydrated throughout the day
- Have a naturally lower saliva flow
- Breathe through your mouth, especially at night
How to Relieve Dry Mouth with Invisalign
The good news is that dry mouth caused by Invisalign is usually mild and can be improved with a few simple changes.
1. Stay Well Hydrated
Drink water regularly throughout the day. Aim to sip water frequently, even when you are not feeling thirsty. This helps maintain moisture in your mouth and supports saliva flow.
2. Remove Aligners When Eating or Drinking Anything Other Than Water
Never eat or drink with your aligners in, apart from still water. Removing them for meals helps your mouth rehydrate naturally during the day.
3. Use Sugar-Free Chewing Gum
Chewing gum can stimulate saliva production. Choose a sugar-free option that is approved for dental use and only chew it when your aligners are out.
4. Avoid Caffeine and Alcohol
Caffeinated drinks and alcohol can both cause dehydration and make dry mouth worse. Try to limit these while you are wearing Invisalign, or follow them with extra water.
5. Use a Moisturising Mouth Spray or Gel
There are several dry mouth sprays and gels available over the counter that can help relieve symptoms. Ask your dentist or pharmacist for a recommendation.
6. Maintain Excellent Oral Hygiene
Dry mouth increases the risk of tooth decay and gum problems. Brush and floss carefully, and consider using a fluoride mouthwash if recommended by your dentist.
When to Speak to Your Dentist
If dry mouth symptoms persist for more than a couple of weeks, become worse or interfere with daily life, it is best to speak with your Invisalign provider.
Persistent dry mouth may be caused by:
- An underlying medical condition
- Medication side effects
- An issue with how your aligners fit
- Mouth breathing or sinus problems
Your dentist can check for other causes and suggest tailored solutions to keep you comfortable and protected during treatment.