Crossbite Treatment in Las Vegas & Henderson
If your child’s jaw slides sideways to bite together, that is worth an evaluation soon rather than at the next check-up.
What a crossbite is
Normally your upper teeth sit slightly outside your lower teeth all the way round, like a lid on a box. A crossbite is where that relationship reverses somewhere — one or more upper teeth bite inside the lower ones.
A posterior crossbite affects the back teeth and is the more common form, usually because the upper arch is too narrow. An anterior crossbite affects the front teeth and can look similar to a mild underbite.
The detail that makes crossbite urgent is what it does to jaw movement. When the arches do not fit, many children unconsciously shift the lower jaw sideways to find a bite that works. That functional shift becomes habitual, and over years of growth it can lead to genuinely asymmetric jaw development — a facial asymmetry that is far harder to correct than the crossbite that caused it.
What causes a crossbite
A narrow upper jaw
The most common cause by a distance. The upper arch simply has not developed wide enough to fit over the lower, so the back teeth bite inside.
Thumb sucking and pacifier use
Sustained sucking narrows the upper arch by changing the balance of pressure from tongue and cheeks during the years the palate is forming.
Mouth breathing
When the mouth rests open, the tongue sits low rather than against the palate. The palate relies on that tongue pressure to widen properly, so chronic mouth breathing is genuinely associated with narrow upper arches.
Delayed or abnormal tooth eruption
A tooth erupting out of position, or a baby tooth retained too long, can push a permanent tooth into a crossbite relationship.
Inherited jaw proportions
Arch width, like most skeletal characteristics, has a strong hereditary component.
Early loss of baby teeth
Losing baby molars early lets neighbouring teeth drift, which can tip a permanent tooth into crossbite as it arrives.
Why crossbite needs catching early
Asymmetric jaw growth
This is the serious one. A jaw habitually shifting to one side during the growth years can develop asymmetrically, producing a facial asymmetry that outlasts the crossbite and is much harder to treat.
Uneven wear on specific teeth
Teeth meeting the wrong way wear against each other in patterns they were not designed for, chipping edges and flattening cusps.
Gum recession
Teeth in crossbite often sit outside the bone envelope on one side, and the gum around them recedes over years.
Chewing on one side only
Many crossbite patients favour one side, which loads the jaw joint and muscles unevenly.
The palate stops being expandable
The midpalatal suture fuses in the mid-teens. Before that, widening the upper jaw is straightforward. Afterwards it needs surgical assistance.
How crossbite is corrected
What is achievable depends heavily on whether growth is still available. This is why the timing of an evaluation matters.
In children — straightforward
A palatal expander widens the upper jaw over a few months by gently separating the midpalatal suture, which has not yet fused. It is one of the most reliable interventions in orthodontics, and parents turn a small key at home on a schedule we set. Often that alone resolves the crossbite entirely.
In teenagers
Expansion is still frequently possible in early adolescence, though the suture is progressively less responsive. Braces can correct single-tooth crossbites at any point. Timing matters, and we will tell you if the window is closing.
In adults
The midpalatal suture has fused, so conventional expansion no longer works. Single-tooth crossbites correct readily with braces or aligners. Widening a genuinely narrow adult upper jaw requires surgically assisted expansion, which Dr. Beth will explain and coordinate if it is warranted.
Crossbite FAQ
How do I know if my child has a crossbite?
Watch them bite together. If the lower jaw visibly slides to one side to close, or if any upper teeth sit inside the lower ones when the back teeth meet, that is a crossbite. Many parents notice the sideways shift before they notice the teeth.
Why does a crossbite need treating early?
Because of what the jaw does to compensate. A lower jaw habitually shifting sideways during growth can develop asymmetrically, producing a facial asymmetry that is considerably harder to correct than the crossbite itself. Correcting it early prevents that entirely.
What is a palatal expander and does it hurt?
A custom appliance fitted to the roof of the mouth that gradually widens the upper jaw. It works because the midpalatal suture has not yet fused in children. Patients report pressure rather than pain, mainly in the first few days and briefly after each turn. Speech and eating feel odd for about a week.
Can adults have a crossbite corrected?
Single-tooth crossbites, yes, straightforwardly with braces or aligners. Widening a genuinely narrow upper jaw is different in adults, because the palatal suture has fused — that requires surgically assisted expansion.
Will a crossbite correct itself?
No. Crossbites do not self-correct, and the compensations the jaw makes tend to become more established over time. This is one of the clearest cases for an orthodontic evaluation by age seven.
Can Invisalign fix a crossbite?
A single tooth in crossbite, often yes. A skeletal crossbite requiring arch expansion is not an aligner case in adults, and in children an expander is the more appropriate tool regardless.
How long does crossbite treatment take?
Expansion itself typically takes a few months of active turning followed by a retention period of several months while new bone fills in. The whole early treatment phase generally runs nine to eighteen months.
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.