What Is a Crossbite, and Does My Child Need Early Treatment?
If you’ve noticed your child’s upper and lower teeth don’t quite line up when they bite down, or their jaw seems to shift to one side, you might be dealing with a crossbite. It’s one of the more common bite issues we see in kids, and the good news is that catching it early can make treatment a lot simpler down the road.
What Exactly Is a Crossbite?
A crossbite happens when some of your child’s upper teeth sit inside (behind) their lower teeth, instead of in front of them like they should. It can affect just a couple of teeth in the front, the back teeth, or sometimes both. There are a few different types:
- Anterior crossbite — front teeth are affected, and the upper teeth sit behind the lower teeth.
- Posterior crossbite — back teeth are affected, often on one side, causing the jaw to shift when biting down.
- Dental crossbite — caused by the position of the teeth themselves.
- Skeletal crossbite — caused by a mismatch in the size or position of the upper and lower jaw.
Signs Your Child Might Have a Crossbite
Crossbites aren’t always obvious just from looking at a smile. Here’s what we watch for:
- The jaw shifts to one side when your child bites down
- Uneven wear on the teeth
- A tooth or teeth that look tucked behind the opposing teeth
- Facial asymmetry
- Difficulty chewing on one side
- Clicking or discomfort in the jaw joint
If you notice any of these, it’s worth bringing up at your child’s next dental visit, or scheduling an orthodontic evaluation.
Why Early Treatment Matters
Kids’ jaws are still growing, which actually works in our favor when it comes to correcting a crossbite. A palatal expander or other early treatment can guide the jaw into proper alignment while it’s still developing, which is much easier than trying to correct the same issue once the jaw has finished growing.
Left untreated, a crossbite can lead to:
- Uneven jaw growth
- Increased risk of tooth wear and chipping
- Jaw pain or TMJ issues later in life
- Speech difficulties in some cases
- A more complicated (and longer) treatment down the road
When Should My Child Be Evaluated?
We recommend kids see an orthodontist by age 7, even if nothing looks obviously wrong. That’s usually when enough permanent teeth have come in to spot developing bite issues, including crossbites, while there’s still plenty of time to guide growth in the right direction.
| Early Treatment | Waiting Until Later |
|---|---|
| Uses natural jaw growth to guide correction | Jaw has finished growing, fewer options available |
| Often simpler, shorter treatment | May require more complex treatment or surgery |
| Can prevent uneven wear and jaw strain | Existing wear and strain may already be present |
How Is a Crossbite Treated?
Treatment depends on the type and severity of the crossbite, but common options include:
- Palatal expanders — widen the upper jaw gradually so the teeth fit together correctly.
- Partial or full braces — reposition individual teeth into proper alignment.
- Invisalign — for older kids and teens with mild to moderate crossbites, Invisalign can sometimes correct the issue with clear aligners instead of brackets and wires.
Should We Choose an Expander or Braces?
| Factor | Palatal Expander | Braces |
|---|---|---|
| Best For | Widening the upper jaw | Repositioning individual teeth |
| Typical Age | Younger children, jaw still growing | Any age once teeth need repositioning |
| Treatment Length | Typically a few months | Varies, often longer |
The Bottom Line
If something about your child’s bite seems off, it’s always worth getting it checked out. Crossbites are common, treatable, and much easier to correct while your child is still growing. Whether the answer ends up being a palatal expander, braces, or watching and waiting a bit longer, an early evaluation gives you the full picture and the most options.
Frequently Asked Questions
What causes a crossbite in children?
A crossbite can be caused by genetics, jaw growth patterns, prolonged thumb sucking or pacifier use, or the timing and position of teeth as they come in.
Can a crossbite correct itself without treatment?
It’s rare for a crossbite to correct itself. Most cases need some form of orthodontic intervention to guide the teeth or jaw into proper alignment.
What age is best to treat a crossbite?
Many crossbites are easiest to treat between ages 7 and 10, while the jaw is still growing, though treatment can happen at other ages depending on the case.
Does a crossbite affect speech?
In some cases, yes. A crossbite can affect how the tongue and teeth interact, which may contribute to speech difficulties in certain children.
Is a palatal expander painful?
Most children feel some pressure or mild discomfort for the first few days after adjustments, but it’s generally well tolerated and improves quickly.
How long does crossbite treatment take?
It depends on the severity and type of crossbite, but early treatment with an expander often takes just a few months, while more involved cases may take longer.