Name: COSMETIC DENTIST IN BEVERLY HILLS, CA
Price range: $$

Crossbite teeth can quietly reshape how a person breathes at night. A narrow upper jaw pulls the palate down and pushes the tongue backward. This shrinks the space air needs to move through during sleep.

Clinical research documents that chain, which explains why snoring and mouth breathing so often accompany an untreated bite. Here is what the evidence shows, and what treatment can do about it.

Key Takeaways

A narrow upper jaw reduces airway space and pushes the tongue back, driving snoring and disrupted sleep.
Crossbite type matters, since unilateral and bilateral cases carry different long-term risks to the jaw bone and facial profile.
Treatment ranges from a palate expander and clear aligners to jaw surgery, depending on age and severity.
Waiting to treat dental misalignment tends to let both breathing problems and dental problems get worse.
The FAQs below cover causes, fixes, and whether a misaligned bite can lead to tooth loss.

How Crossbite Constricts the Airway and Drives Snoring and Sleep-Disordered Breathing

Sleep-disordered breathing and a misaligned bite connect through a chain of events that starts at the dental arch. Understanding each step shows why an orthodontic assessment often looks at breathing patterns, not just tooth position.

What Happens Inside the Airway

The upper jaw narrows and the palate sits lower, closer to the nasal cavity.
Nasal airway volume drops as a result.
The tongue loses its resting position and drops further back in the mouth.
During sleep, that backward tongue position compresses the pharyngeal airway.
Airway resistance rises, which can produce snoring or sleep apnea.

What the Research Shows

A cross-sectional study on sleep-disordered breathing and malocclusion links backward tongue posture to a reduction in pharyngeal airway space. The same study identifies crossbite as a common craniofacial feature in children with SDB. It also recommends maxillary expansion to improve sleep-related breathing.

A longitudinal study found that children with sleep-disordered breathing had a 38.2% smaller minimum cross-sectional area than children without SDB. Posterior crossbites showed a strong association with that difference.

The study also found a dose-response pattern: the longer a child’s SDB lasted, the greater their malocclusion progression became. Children whose SDB went into remission showed spontaneous correction of their posterior crossbite. This points to a two-way relationship between jaw development and breathing function.

Does Mouth Breathing Make Crossbite Worse?

Yes, and the reverse is also true. When nasal airflow is blocked, the mouth opens to compensate. This shifts the pressure balance inside the mouth and can worsen jaw constriction over time.

A study on SDB and orthodontic treatment needs found that 68.6% of snoring participants required orthodontic treatment. Constricted maxillas and reduced interdental measurements were common in that group, the same features that define crossbite.

A separate systematic review found that jaw expansion for bilateral crossbite increased airway volume and improved nasal airflow. This gives orthodontists another reason to screen for breathing issues during a routine exam.

Types of Dental Misalignment: Unilateral, Bilateral, Anterior, and Lingual Crossbite

Not every dental misalignment affects the airway the same way. The type, location, and duration all shape what happens structurally and what risks build up over time.

Unilateral Crossbite

A unilateral crossbite affects one side of the mouth. The upper teeth on that side sit inside the lower teeth rather than outside them. This uneven bite makes the jaw shift to one side when closing.

That repeated shifting can alter jaw bone development and change the facial profile over time. Research links unilateral cases most commonly to sleep-disordered breathing in children.

Bilateral Crossbite

A bilateral crossbite affects both sides. The entire upper dental arch is narrower than the lower jaw. The constriction spreads across the whole palate rather than staying limited to one side. This type connects most directly to the airway compression described above.

Anterior Crossbite

Anterior crossbites occur when the upper front teeth sit behind the lower front teeth. They affect bite dynamics at the front of the mouth. Left uncorrected, they can also contribute to skeletal discrepancies in the jaw bone.

In some cases, anterior crossbites may also affect speech. Tongue placement for certain sounds depends on how the front teeth line up.

Lingual and Buccal Crossbite

A lingual crossbite occurs when upper teeth shift inward, resting on the tongue side of the lower teeth. A buccal crossbite is the reverse, where the upper teeth flare outward past the lower teeth on the cheek side. Both represent teeth misalignment at the individual tooth level, though either can span multiple teeth.

Single Tooth Crossbite

A single tooth crossbite involves just one tooth out of position, sometimes alongside crowded teeth nearby. Even that limited case can create uneven bite forces that accelerate enamel wear and affect jaw function over time.

Research on mouth breathing and malocclusion is specific about how these types relate to breathing function. A cross-sectional study on oral habits found that mouth breathing is closely related to anterior or posterior crossbite. Each condition can cause or worsen the other.

Orthodontic Treatment Options: From Palatal Expanders to Clear Aligners and Jaw Surgery

Treatment for a misaligned bite tends to follow a progression based on age, severity, and skeletal versus dental cause. From a dental perspective, sleep-disordered breathing involves the orthodontist evaluating the anatomic variables that contribute to breathing problems. This includes jaw constriction, checked during a standard exam.

Palatal Expanders

For many patients, especially children, a palate expander is the starting point. This orthodontic appliance widens the upper arch gradually over months. A systematic review on rapid maxillary expansion looked at this kind of jaw expansion in children with bilateral crossbite. It found that jaw expansion helps improve nasal airflow.

Clear Aligners and Invisalign

For patients whose bite problems are primarily dental rather than skeletal, aligner systems reposition teeth without fixed hardware. Our practice offers Invisalign as a treatment option. Patients often ask about Invisalign Teen for younger patients whose jaws are still developing.

A systematic review on clear aligner therapy in adolescent patients found predictable outcomes for anterior crossbite correction. Both patients and parents reported high satisfaction. An orthodontic assessment can determine whether this approach fits a specific case.

Other Orthodontic Appliances

Several other appliances appear across general orthodontic practice, often combined based on the treatment plan:

Self-ligating braces
Lingual braces
Rubber bands to guide jaw positioning

Each fits a different orthodontic treatment plan based on the patient’s age, crossbite type, and skeletal structure.

Surgical Correction

When skeletal discrepancies are significant, particularly in adults whose jaw growth is complete, surgical correction may be necessary. An oral maxillofacial surgeon typically performs jaw surgery alongside an orthodontist. Tooth extraction sometimes accompanies this when crowding is present. Afterward, a mouth guard or sports guard is sometimes recommended to protect the corrected bite during athletic activity.

Risks of Leaving a Crossbite Untreated

Leaving a misaligned bite untreated creates a growing list of dental problems beyond breathing:

Uneven bite dynamics that accelerate enamel wear and raise the risk of tooth decay
Jaw and head pain from chronic muscle strain
Temporomandibular joint disorders, sometimes called TMJ disorders, develop when the joint absorbs uneven stress from a misaligned bite
Gum issues that can progress to more serious gum disease when misaligned teeth are harder to clean thoroughly

These issues tend to compound, which is why earlier orthodontic care tends to produce better outcomes than waiting.

Ready to Fix Your Crossbite Teeth and Finally Sleep Through the Night?

Crossbite teeth are not just a cosmetic concern, they are often the missing piece in an unexplained sleep or breathing complaint. Snoring, restless nights, and daytime fatigue can all trace back to a bite pattern that has never been evaluated for its effect on the airway. Catching this connection early tends to make treatment simpler, since a palate expander or clear aligners generally involve less complexity than the surgical options sometimes needed later.

The research is consistent: the longer a misaligned bite goes uncorrected, the more the structural and breathing issues tend to layer on top of each other. It’s worth asking whether your snoring, or your child’s snoring, has ever been discussed alongside dental alignment, since that connection is often overlooked outside of orthodontics. Dr. Jonathan Gabai, DDS can take a look at your bite and talk through what treatment could look like for your situation. Contact us to get started!

FAQs

What are crossbite teeth?

A crossbite is a misalignment where one or more upper teeth sit inside the lower teeth when the mouth closes, instead of outside them. It differs from an overbite or underbite, which involve the whole arch rather than specific teeth. Many cases are first noticed during a child’s routine dental checkup, often between ages 6 and 12 as permanent teeth come in.

How to fix crossbite teeth?

Treatment timelines vary by method and age. A palate expander is typically worn for several months to gradually widen the jaw, while clear aligner treatment for a dental crossbite often runs between six and eighteen months. Adults with skeletal involvement may need surgery combined with orthodontics. Most plans also include a retainer phase afterward to help hold the new position.

Can a crossbite cause teeth to fall out?

Tooth loss from a crossbite is rarely sudden. It usually develops gradually as uneven forces wear down specific teeth faster than others, sometimes leading to small chips or cracks over the years. This uneven wear pattern is often more noticeable on the teeth doing extra work to compensate for the misalignment. Regular checkups can catch these changes before they become serious.

What causes crossbite teeth?

Genetics play a large role, particularly when a narrow upper jaw runs in the family. Childhood habits like thumb-sucking or prolonged pacifier use can also shift developing teeth out of position. Less commonly, losing a baby tooth too early can let neighboring teeth drift into the gap, causing the permanent tooth to erupt misaligned. Jaw injuries during childhood can contribute as well.

Does a crossbite get worse over time if untreated?

Yes, and age plays a significant role in how much it progresses. Once jaw growth is complete, typically by the late teens, the bone can no longer be reshaped as easily, so adult treatment more often requires surgical options rather than simple expansion. This is one reason orthodontists generally recommend addressing a crossbite well before adulthood whenever it’s feasible.

Why Untreated Crossbite Teeth Are Linked To Snoring And Mouth Breathing