Most parents focus on the braces themselves-the appointments, the adjustments, the food restrictions. But there is something else that significantly affects how well braces work, and it often gets overlooked entirely.
If your teen breathes through their mouth most of the time-during the day, during sleep, or both-it can directly interfere with orthodontic treatment. Understanding can mouth breathing affect orthodontic treatment is one of the most important things a parent can know before and during braces.
If you are working with an orthodontist in NE Calgary, raising this topic at your next appointment could make a meaningful difference in your teen’s results.
What Is Mouth Breathing and Why Is It a Problem?
Breathing through the nose is the body’s natural default. The nose filters air, warms it, and helps regulate the pressure inside the mouth and nasal passages. Nose breathing also supports proper tongue posture-which plays a bigger role in dental development than most people realize.
Mouth breathing bypasses all of this. When a person breathes through their mouth consistently, several things change in the oral environment:
- The tongue rests low in the mouth instead of being pressed against the upper palate
- The lips are parted rather than gently closed
- Muscle pressure around the teeth becomes unbalanced
- The mouth dries out more quickly, reducing the protective effects of saliva
- The jaw tends to drop forward and downward over time
Each of these changes creates conditions that work directly against what braces are trying to achieve.
How Does Mouth Breathing Impact Braces Results?
This is the heart of the issue-and the answer matters a great deal for any teen currently in orthodontic treatment.
It Creates Competing Forces on the Teeth
Braces work by applying careful, controlled pressure to move teeth into the correct position. But teeth respond to all the forces acting on them-not just the braces.
When a teen breathes through their mouth, the tongue sits low, and the cheeks press inward. This creates abnormal muscle pressure that pushes against the very movement the braces are trying to create. In simple terms, the braces push the teeth one way while the mouth breathing habits push them another.
This one is one of the clearest explanations as to how mouth breathing impacts braces results. It’s another competing force, which can make treatment take longer, be less accurate, and, in some instances, fail to achieve the target result.
It Can Cause Teeth to Drift Back
Once braces are removed, the teeth need to hold their new position. This is why retainers are used. But mouth breathing creates ongoing pressure that increases the risk of teeth shifting back toward their original position-even with retainer use.
This means the result your teen worked months or years to achieve may be harder to maintain if mouth breathing is not addressed alongside the orthodontic treatment.
It Contributes to Gum Problems
Mouth breathing dries out the gums and the tissue around the teeth. Dry oral tissue is more vulnerable to inflammation, irritation, and gum disease. For a teen wearing braces-where cleaning is already more challenging-this creates an elevated risk of gum problems that can complicate treatment.
It Affects Jaw Development in Teenagers
Teenagers are still growing. The jaw and palate are more adaptable during these years than in adulthood. Chronic mouth breathing during this critical window can influence how the jaw develops-contributing to a narrower palate, a longer facial structure, and bite changes that make orthodontic correction more complex.
Mouth Breathing and Braces Problems-Common Signs to Watch For
As a parent, these are the signs worth paying attention to:
- Your teenager regularly sleeps with their mouth open
- They snore or are a noisy sleeper
- Their lips are commonly dry or cracked
- They commonly have unpleasant breath despite clean oral habits
- Their tongue is frequently in a low position in the mouth while resting
- They appear to be mouth breathers while both awake and while asleep
If several of these apply to your teen, bringing it up with their orthodontist near you is a conversation worth having.
What Causes Mouth Breathing in Teens?
Mouth breathing is usually a symptom-not the root problem. Common underlying causes include:
| Cause | How It Leads to Mouth Breathing |
| Chronic nasal congestion | A blocked airway forces the mouth to compensate |
| Enlarged adenoids or tonsils | Restricts nasal airflow significantly |
| Allergies | Swelling in the nasal passages reduces airflow |
| Deviated nasal septum | Structural issue that limits nasal breathing |
| Habitual mouth breathing | Learned habit that persists even after congestion clears |
| Asthma | Can trigger mouth breathing during and between episodes |
Identifying the cause is important-because the treatment approach differs depending on what is driving the habit.
Can Mouth Breathing Be Corrected During Orthodontic Treatment?
Yes, and ideally, it should be addressed as early as possible during treatment rather than after.
A collaborative approach works best. Depending on the cause, your teen may benefit from:
- A referral to an ENT specialist-to assess adenoids, tonsils, or structural nasal issues
- Allergy testing and management-to reduce chronic nasal congestion
- Myofunctional therapy-exercises designed to retrain the tongue, lips, and breathing pattern
- Nasal breathing exercises-to build the habit of nasal breathing consistently
- Palate expansion-In some cases, widening the upper palate through orthodontic appliances can improve nasal airflow
Orthodontists who understand the connection between airway function and dental development are well-positioned to identify these issues and coordinate care with the right specialists.
What Parents Can Do Right Now
You do not have to wait for the next orthodontic appointment to start paying attention.
Practical steps for parents:
- Observe your teen’s breathing while they sleep-is their mouth open?
- Ask their family doctor to check for nasal obstruction or enlarged adenoids
- Talk to their orthodontist about whether mouth breathing may be affecting their progress
- Encourage nasal breathing during the day as a conscious habit
- Look into whether braces near you providers in your area take airway health into account as part of their assessment
Early awareness makes a significant difference. The sooner mouth breathing is identified and addressed, the better the orthodontic outcome will be.
The Connection Between Breathing and a Beautiful Smile
It might seem surprising that something as basic as how your teen breathes could affect the outcome of their braces. But the mouth is part of a connected system-the teeth, the jaw, the tongue, the airway, and the muscles all influence each other constantly.
Orthodontic treatment works best when the entire system is functioning well. Addressing mouth breathing is not a separate concern from straightening teeth-it is part of the same picture.
Help Your Teen Get the Most From Their Treatment-Totally Orthodontics Is Here for You
Each teen deserves to feel confident about their smile and to receive treatment that truly works for them. Working to address habits like mouth breathing while using orthodontics is part of what makes the treatment long-term.
At Totally Orthodontics, the team takes a thorough, whole-patient approach to every case. They understand that great orthodontic results depend on more than just the braces-they depend on understanding each patient’s unique habits, biology, and needs. If you have concerns about mouth breathing or want to ensure your teen’s treatment is as effective as possible, book a consultation with us today. Your teen’s best smile starts with the right team in their corner.
Frequently Asked Questions
How can I tell if my teen is a mouth breather?
The easiest way to know if your teen is a mouth breather is if their mouth hangs open during sleep. You can also look for a number of other symptoms: dry or chapped lips, snoring, persistent bad breath even after brushing their teeth, and audible mouth breathing even when resting.
Will my teen’s braces still work if they breathe through their mouth?
Braces can still achieve results, but mouth breathing creates competing forces and increases the risk of slower progress, gum problems, and teeth shifting back after treatment-which is why addressing it during treatment is strongly recommended.
Is mouth breathing reversible in adolescents?
Most cases of mouth breathing are reversible in adolescents. This includes determining and correcting the cause (i.e., allergies, chronic congestion, or adenoid hypertrophy) and correcting the improper breathing pattern with myofunctional therapy.
Should I see an orthodontist or a doctor first about mouth breathing?
Starting with either is reasonable-your family doctor can assess for structural or allergy-related causes while your orthodontist can evaluate how the habit is affecting dental development and treatment progress.
