Crossbite treatment with clear aligners
A crossbite is a bite problem that many people do not notice until a dentist points it out. It can cause uneven wear, gum problems and strain on the jaw over time. Crossbite treatment with aligners is a common option for crossbites caused by tooth position, and this guide explains how it works, what is involved and when a different approach may be better.
What is a crossbite?
In a typical bite, the upper teeth sit slightly outside the lower teeth all the way around. In a crossbite, some upper teeth sit inside the lower teeth instead. There are two main types.
Anterior crossbite
One or more upper front teeth sit behind the lower front teeth. When all of the front teeth are involved, this overlaps with what people call an underbite. Read our guide to underbite treatment with aligners for more on that.
Posterior crossbite
One or more upper back teeth sit inside the lower back teeth. It can affect one side or both sides of the mouth. It often goes with a narrow upper arch.
Why a crossbite matters
A crossbite is not only about appearance. Over time it can contribute to:
- Uneven wear, chipping or cracks on the affected teeth
- Gum recession where a tooth is pushed against the bone
- The lower jaw shifting to one side when you close, which can affect the jaw joints and facial symmetry
- Difficulty cleaning crowded teeth, raising the risk of decay and gum disease
Not every crossbite needs urgent treatment, but your dentist will explain the risks in your case.
How crossbite treatment with aligners works
The plan depends on whether the problem is in the front or the back, and on whether it is caused by the teeth or the jaws.
Correcting a front crossbite
For one or two upper front teeth stuck behind the lower teeth, the aligners move those teeth forwards, past the lower teeth, in small stages. The lower teeth may also be moved slightly back. Space is planned for each movement, sometimes using IPR or closing small gaps. Because the teeth have to pass each other, the plan may briefly open the bite or use bite ramps so the teeth do not collide.
Correcting a back crossbite
For a posterior crossbite caused by tipped teeth or a mildly narrow arch, aligners can gradually widen the upper arch (dental expansion) by tipping and moving the back teeth outwards. The plan may also bring lower back teeth slightly inwards. Attachments on the back teeth help the aligner control these movements accurately. See aligner attachments explained.
Elastics
Some crossbites benefit from cross elastics, small rubber bands attached between upper and lower teeth. Alignova plans can include elastic cutouts and precision hooks for this when your dentist prescribes them.
The planning step
Your dentist takes a digital scan or impressions and sends them with their instructions. At Alignova, our lab prepares an orthodontist-reviewed 3D setup that shows each stage of movement, where attachments go and any IPR. Your dentist reviews it carefully, requests changes if needed, and approves it online. Nothing is made until that approval. The aligners are then manufactured in Pakistan and sent to your dentist's clinic. Learn more about how clear aligners work.
When aligners alone may not be enough
Expansion with aligners moves teeth, not bone. If a crossbite is caused by a significantly narrow upper jaw, especially in adults, aligners alone may not be suitable. Options may include:
- A palatal expander in children and some teenagers, while the jaw is still growing
- Fixed braces for some complex movements
- In adults with a large skeletal problem, treatment combined with surgery, planned with a specialist
Sometimes a combination works well, for example an expander first and aligners afterwards. Your dentist will advise.
Crossbites in children and teenagers
Crossbites are often first noticed in childhood. In younger children, the upper jaw is still growing, so a dentist may recommend early treatment with an expander rather than aligners, because widening the jaw itself is easier at this age. Once the permanent teeth are in and growth has slowed, aligners become a more common option for teenagers. If you are a parent, it is worth having a crossbite checked early even if treatment is not started straight away. Read more about clear aligners for teenagers and adults.
Day-to-day tips
- Wear your aligners about 20 to 22 hours a day. Crossbite correction depends on steady force.
- Use chewies or bite firmly when putting a new aligner in so it seats fully over attachments.
- Wear elastics exactly as prescribed, and carry spares.
- Send your progress photos on time if your dentist uses the Alignova patient app. Your dentist reviews them; AI-assisted analysis is in development and not yet live.
After treatment
Expanded arches in particular can try to narrow again. Retainers are essential, and your dentist will tell you how to wear them. Read about retainers after aligners.
Frequently asked questions
Can clear aligners fix a crossbite in adults?
Many crossbites caused by tooth position can be treated with aligners in adults. If the cause is a narrow jaw, your dentist may suggest a different or combined approach.
Is a crossbite on one tooth easy to fix?
A single tooth in crossbite is often one of the more straightforward cases, but it still needs proper planning and an examination first.
Do crossbites need to be treated?
Not always urgently, but crossbites can cause wear, gum problems and jaw shifting over time. Your dentist will explain whether treatment is advisable for you.
Will I need rubber bands for a crossbite?
Some plans use cross elastics. It depends on your bite and your dentist's plan.
Clear aligners are a prescription treatment. Whether they suit you is decided by a licensed dentist or orthodontist after an examination.
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