Underbite Treatment in Las Vegas & Henderson
Of all the bite patterns, this is the one where treating early makes the biggest difference — and waiting costs the most.
What an underbite is
An underbite is where the lower front teeth sit ahead of the upper front teeth when you bite together. Orthodontists call it a Class III relationship, and it is the reverse of the normal arrangement.
It ranges from mild — one or two lower teeth edging in front — to pronounced, where the whole lower jaw projects and the facial profile is visibly affected.
The important distinction is whether it is dental or skeletal. A dental underbite means the teeth are tipped into that position but the jaws themselves are proportionate, and it is comparatively straightforward to correct at any age. A skeletal underbite means the lower jaw is genuinely longer, or the upper jaw shorter, than it should be. That is a growth problem, and growth is only available for a limited window.
Where an underbite comes from
Genetics, more than anything
Underbite runs in families more strongly than most bite patterns. If a parent has one, watch for it in the children and get an evaluation early rather than waiting.
An underdeveloped upper jaw
Frequently the problem is not that the lower jaw is too long but that the upper is too short. That distinction changes the treatment entirely, and a 3D scan shows it clearly.
Excess lower jaw growth
The lower jaw continues growing later than the upper, sometimes into the late teens, and in some patients it outpaces it.
Early loss of baby teeth
Where baby molars are lost prematurely, the bite can settle into a forward posture that becomes habitual.
Airway and mouth breathing
Chronic mouth breathing alters resting tongue and jaw posture, which over years of growth can contribute to how the jaws relate.
Cleft palate and syndromic causes
Less common, but underbite is associated with certain craniofacial conditions and is managed as part of a wider treatment plan.
Why underbite is the one not to wait on
The growth window closes
A skeletal underbite guided at eight or nine, while the upper jaw can still be encouraged forward, is a very different proposition from the same discrepancy at nineteen, which may require jaw surgery.
Uneven and accelerated tooth wear
Teeth meeting in reverse wear against each other in ways they were not built for, chipping the lower incisor edges and the uppers behind them.
Chewing efficiency drops
Front teeth that meet in reverse cannot shear food properly, and the back teeth compensate by working harder.
Speech can be affected
Certain sounds rely on the tongue meeting the upper front teeth in a specific relationship. A pronounced underbite can alter that.
Jaw joint loading
An underbite loads the temporomandibular joints asymmetrically, which some patients experience as discomfort or fatigue over time.
How underbite is corrected
What is achievable depends heavily on whether growth is still available. This is why the timing of an evaluation matters.
In children — the best window
Ages seven to ten is where the most can be achieved. A palatal expander combined with a reverse-pull face mask can encourage the upper jaw forward while the sutures are still responsive. Results achievable at eight are frequently not achievable at eighteen without surgery. If there is any family history, do not wait for the dentist to raise it.
In teenagers
Still often treatable orthodontically, particularly in early adolescence while some growth remains. Braces with elastics can correct dental underbites well. For skeletal cases we monitor growth carefully, since the lower jaw may continue growing into the late teens and treatment planned too early can be outgrown.
In adults
Mild dental underbites correct with braces or aligners. Genuine skeletal underbites in a fully grown adult usually require orthognathic surgery combined with orthodontics — braces before, surgery, then braces to finish. Dr. Beth will tell you honestly if that is the situation and coordinate with an oral surgeon rather than attempting a camouflage that will not hold.
Underbite FAQ
Can an underbite be fixed without surgery?
Often yes, particularly in children and where the underbite is dental rather than skeletal. Early treatment with an expander and face mask can correct many skeletal underbites without surgery ever being required. In fully grown adults with a significant skeletal discrepancy, surgery is more likely to be necessary.
At what age should an underbite be treated?
Earlier than any other bite pattern. Ages seven to ten is the window where the upper jaw can still be encouraged forward. If there is family history of underbite, an evaluation at six or seven is genuinely worth booking rather than waiting for a dentist to mention it.
Will my child grow out of an underbite?
No — and in skeletal cases it typically worsens with growth, because the lower jaw keeps developing. This is the opposite of some childhood dental issues that do self-correct. An underbite noticed in a young child should be evaluated rather than watched.
Can Invisalign fix an underbite?
Mild dental underbites, sometimes. Skeletal underbites are not an aligner case. Dr. Beth confirms which yours is using a 3D scan, and will tell you plainly if aligners cannot achieve the result.
Is an underbite just cosmetic?
No. Beyond appearance it causes uneven tooth wear, reduced chewing efficiency, potential speech effects and asymmetric loading of the jaw joints. The functional case for treating it is stronger than for most bite patterns.
How long does underbite treatment take?
Early treatment with an expander and face mask typically runs nine to eighteen months, followed by monitoring and often a later phase of braces. Adult surgical cases run longer, generally two years or more across the full sequence.
Does an underbite run in families?
More strongly than most orthodontic conditions. If you or your partner has one, have your children evaluated around age seven rather than waiting to see how their teeth come in.
Find out what is actually going on — free.
An hour with Dr. Beth, a 3D scan, and a straight answer about whether treatment is warranted, when, and what it would cost. Including “not yet” where that is the honest answer.