Proper Tongue Positioning: Key to Preventing Dental Issues - Dentistry

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Position of the lips and tongue?


Hello, doctor.
What is the correct position for the tongue? I read online that it should be against the hard palate, and an orthodontist mentioned that keeping the mouth closed can prevent protruding teeth.
However, when I close my mouth, my tongue naturally presses against my front teeth, which seems like it could contribute to protrusion.
Right now, I'm trying to consciously control my tongue to retract slightly and press against the hard palate to avoid contact with my front teeth, but since it's a deliberate effort, I often forget, and it doesn't feel very relaxed.
When I sleep, I still want to relax.
If I don't keep my mouth closed, my tongue won't touch my front teeth, but I'm unsure what the correct position should be.
I assume that issues with protruding teeth mainly affect children, right? As an adult, does it still matter whether I keep my mouth closed or not?

Niming, 20~29 year old female. Ask Date: 2023/05/26

Dr. Lin Jiayong reply Dentistry


Hello: It is recommended to relax and maintain your original state.
If you are currently undergoing orthodontic treatment, you may ask your dentist to assist in creating a tongue retainer device to prevent the tongue from interfering with tooth movement.
If you are not currently in orthodontic treatment and have no related dental or oral surgical procedures, it is advisable to maintain your original condition.

Reply Date: 2023/05/26

More Info


Proper tongue positioning is indeed crucial for maintaining oral health and preventing dental issues. The ideal resting position for the tongue is against the roof of the mouth (the hard palate), just behind the front teeth. This position helps to maintain the natural alignment of the teeth and supports the development of the dental arch.
When the mouth is closed, the tongue should rest comfortably against the palate without exerting excessive pressure on the teeth, particularly the incisors (front teeth). If the tongue is constantly pushing against the front teeth, it can lead to dental problems such as protrusion of the teeth (often referred to as "buck teeth" or "overjet"), which can affect both aesthetics and function.

Your concern about the tongue's position when the mouth is closed is valid. If the tongue is pressing against the front teeth, it can indeed contribute to dental misalignment over time. However, it is essential to find a balance where the tongue is not exerting pressure on the teeth while still maintaining a closed mouth posture.
Here are some tips to help you achieve the correct tongue positioning:
1. Awareness and Practice: It may take some time to develop awareness of your tongue's position. Practice consciously placing your tongue against the roof of your mouth during the day. Over time, this can become a habit.

2. Relaxation: It's important to relax your jaw and facial muscles. Tension can lead to improper tongue positioning. Try to keep your jaw relaxed and avoid clenching your teeth.

3. Breathing: Focus on breathing through your nose rather than your mouth. This can help keep your mouth closed naturally and encourage the tongue to rest against the palate.

4. Consultation with Professionals: If you are concerned about your tongue posture and its impact on your dental health, consider consulting with an orthodontist or a myofunctional therapist. They can provide personalized guidance and exercises to help you achieve the correct tongue posture.

5. Children vs. Adults: While it is true that improper tongue positioning can have a more significant impact on children due to their developing jaws and teeth, adults can also experience dental issues related to tongue posture. It is never too late to address these concerns, and maintaining proper tongue positioning can help prevent further complications.

In summary, the correct resting position for the tongue is against the hard palate, just behind the front teeth, without exerting pressure on the teeth. If you find it challenging to maintain this position, consider seeking professional advice to develop strategies that work for you. Proper tongue positioning is essential for dental health, and making adjustments now can help prevent issues in the future.

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