Underbite treatment with clear aligners

An underbite is when the lower front teeth sit in front of the upper front teeth when you bite together. It can affect how you chew, how your teeth wear and how your profile looks. Underbite treatment with aligners is possible for some people, but not for everyone, so it is worth understanding what your dentist will be looking for before you decide.

What is an underbite?

In a typical bite, the upper front teeth sit slightly in front of and over the lower front teeth. In an underbite, also called an anterior crossbite or Class III bite, this is reversed: the lower teeth are in front. It can involve one or two teeth, or the whole front of the mouth.

An underbite can lead to:

Uneven wear or chipping of the front teeth
Gum recession on lower front teeth that are pushed forwards
Difficulty biting into some foods
Strain on the jaw joints for some people
Concerns about appearance and facial profile

Dental vs skeletal underbite

This is the most important question in any underbite case.

Dental underbite

Here the jaws are reasonably well related, but the teeth are tipped the wrong way. The upper front teeth may lean backwards, the lower front teeth may lean forwards, or crowding has pushed one or two teeth out of line. Sometimes the jaw also slides forward when you bite because a tooth gets in the way. These cases are often suitable for clear aligners.

Skeletal underbite

Here the lower jaw is larger or further forward than the upper jaw, or the upper jaw is underdeveloped. Moving teeth alone may not correct this. In adults, a significant skeletal underbite may need orthodontic treatment combined with jaw surgery, planned with a specialist. In growing children, early treatment with other appliances may be considered.

Your dentist decides which type you have after an examination, often with X-rays and photos of your profile.

How underbite treatment with aligners works

For a dental underbite, the aim is to bring the upper front teeth forward and the lower front teeth back, so the upper teeth end up in front again. A clear aligner plan may include:

Tipping and moving teeth: each aligner moves the upper teeth slightly forward and the lower teeth slightly back, in small stages.
Creating space: to bring lower teeth back, space may be needed. This can come from IPR, closing gaps or adjusting the arch shape.
Attachments: small tooth-coloured bumps help the aligner control the movement precisely. See aligner attachments explained.
Elastics: elastic cutouts or precision hooks let your dentist attach small rubber bands between the arches to help correct the relationship between upper and lower teeth.

At Alignova, every plan starts with your dentist's scan or impressions and their instructions. Our lab prepares an orthodontist-reviewed 3D setup showing every stage, and nothing is manufactured until your dentist has reviewed and approved it. Read about the treatment process step by step.

What to expect during treatment

As the front teeth pass each other, there may be a stage where the edges of the upper and lower teeth meet end to end. This is a normal part of correcting an underbite, and your dentist will guide you through it. Biting into firm food with your front teeth may feel different for a while.

Consistent wear is essential: about 20 to 22 hours a day, and elastics exactly as prescribed. With Alignova cases, the patient app records daily wear and asks for three photos in fixed poses at each aligner change, so your dentist can follow progress between visits. AI-assisted photo review is in development and is not live yet. Learn more about aligner monitoring.

Questions to ask your dentist

An underbite is a case where it pays to ask questions before you start. Useful ones include:

Is my underbite mainly dental, skeletal or both?
What will the 3D plan move, and can I see it before treatment starts?
Will I need elastics, attachments or IPR?
What happens if the bite does not correct as planned?
What retainers will I need afterwards, and are they included in the quote?

Many clinics in Pakistan offer installments, and a complete quote should cover refinements and retainers as well as the aligners themselves. Our clear aligners price guide explains what affects the cost. If you are not sure where to start, you can find partner dentists through our locations page.

When aligners are not the right choice

Your dentist may advise against aligners alone if:

The underbite is mainly skeletal and large
Correcting it with tooth movement alone would push teeth beyond what the bone and gums can support
There is active gum disease or untreated decay
Consistent wear would be difficult

In these cases, braces, a combined surgical approach, or treatment in stages may be recommended. A good dentist will be clear about what aligners can and cannot do.

Keeping the result

Once the upper teeth are back in front, the bite itself can help hold them. Retainers are still needed to stop teeth drifting, especially the lower front teeth. Your dentist will advise on the type and how often to wear them. See retainers after aligners.

Frequently asked questions

Can clear aligners fix an underbite without surgery?

For a dental underbite, often yes. For a significant skeletal underbite in an adult, aligners alone may not be enough, and your dentist may discuss a combined approach with a specialist.

How do I know if my underbite is dental or skeletal?

Only an examination can tell. Your dentist will look at your teeth, profile and jaw movement, and may take X-rays.

Will my face change after underbite treatment?

Moving teeth can change lip support slightly, but large changes to the profile usually need jaw treatment. Your dentist can explain what to expect in your case.

Can one tooth in an underbite be corrected with aligners?

A single tooth sitting behind the lower teeth is often one of the simpler cases for aligners, but your dentist will confirm after examining you.

Clear aligners are a prescription treatment. Whether they suit you is decided by a licensed dentist or orthodontist after an examination.

Take the free smile check and a partner dentist will contact you about an assessment.