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Crossbite Teeth: Treating an Uneven Jaw with Surgery or Braces

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A crossbite is a kind of dental misalignment where the upper and lower teeth don't connect in the correct position when you bite. Dentists can usually spot a crossbite at an early age. They are likely to recommend fixing it because if left untreated, this condition can result in an uneven jaw and numerous oral health problems.

There are various crossbite treatments available, including elastics, braces and surgery. The recommended treatment for you will depend on whether you have a posterior or anterior crossbite, and how severe it is. 

crossbite braces
Braces are one possible treatment for crossbite

Keep reading to find out more:

  • What is a crossbite?
  • All the different types of crossbite
  • Crossbite correction
  • What happens if you don’t fix a crossbite?
  • How it's treated at different ages
  • How much does jaw realignment surgery cost in the UK?

We hope the information in this article helps you understand this condition better and seek the right treatment.

What is a crossbite?

what is a crossbite teeth
This is just one of many misalignment problems that can occur

A crossbite occurs when the upper teeth sit on the inside of the lower teeth or when the upper back teeth overhang the lower teeth. The outward appearance can be an uneven or asymmetrical jaw.

This condition may be a result of genetic factors, such as overcrowded teeth, or behavioural factors, such as thumb sucking. Because there are lots of different ways in which a crossbite can occur, there are also lots of different terms used to describe crossbite teeth.

Types of crossbite

There are different ways to classify this condition according to how many teeth are affected, where in the mouth they are, and what position they are in. Here is a brief overview of the different terms used to describe a crossbite:

Anterior crossbite

An anterior crossbite, also known as an underbite, affects the front of the mouth, meaning the upper teeth rest behind the lower teeth at the front. There are a few different causes, including:

anterior crossbite upper teeth behind lower teeth
An anterior crossbite is also known as an underbite

This type of crossbite can be quite noticeable, causing the chin to protrude or the jaw to look uneven.

Posterior crossbite

Posterior crossbites affects the back teeth. Again, the upper teeth sit inwards from the lower teeth, when they should be further out. The causes of this type of crossbite are similar to those that affect the front teeth. Another contributing factor can be baby teeth falling out late, and permanent teeth appearing in the wrong order and position.

Posterior crossbites can be really simple to treat, especially if caught early when the permanent teeth are erupting.

Buccal and lingual crossbite

These terms describe whether the teeth are too far out towards the cheek (buccal) or too far in towards the tongue (lingual). With either of these types, you can usually feel a lot of the biting surface of the inner tooth when you close your mouth.

Bilateral and unilateral

A bilateral crossbite diagnosis means that both sides of your mouth are affected by the crossbite, whereas a unilateral crossbite is just on one side of your mouth. The treatment that you receive will probably look the same for these issues, but the mechanics of what your dentist does might be a little different.

Single tooth and segmental

singular anterior crossbite
A crossbite can affect a single tooth

A single tooth crossbite affects just one tooth. It can happen when a bottom tooth sticks forward too much (usually one of the front teeth or a canine) or when an upper tooth is pushed towards the inside of your mouth.

A segmental crossbite means that a few – but not all – of the teeth don’t line up. It will normally affect two or three teeth in a row.

Here's a recap on this crossbite terminology and how each one affects the dental arches:

Type of crossbite What it means
Anterior Affects front teeth
Posterior Affects rear teeth
Buccal Teeth positioned towards cheek
Lingual Teeth positioned towards tongue
Bilateral Affects one side of the mouth
Unilateral Affects both sides of the mouth
Single tooth Affects one tooth
Segmental Affects just 2-3 teeth

Treatment options for crossbite correction

Dentists may have many terms to define a crossbite, but the treatment options are similar in most cases. Crossbite teeth treatment is best started in childhood, when teeth and bones are much easier to move because they aren't fused in place.

There is evidence which suggests that if crossbite braces treatment is started early, it's up to 80% effective without other treatment being required.

Ask a dentist: What happens if you don't fix a crossbite?

Misaligned teeth are not just a cosmetic issue when it comes to oral health and wellness. Any time teeth don’t fit together properly, abnormal wear and tear can occur on affected teeth along with jaw issues. Crossbite occurs when the upper teeth fit inside of the lower teeth. This misalignment of teeth (or bone) can affect one tooth or many teeth. But, the greater worry is how it can affect the jaw.

If a crossbite is not corrected, it can wear down the enamel of the tooth as the jaw shifts to the side. It can also cause lopsided jaw growth. Depending on how severe the crossbite is, treatment may incorporate a palatal expander, a fixed or removable orthodontic appliance used to make the upper jaw wider. Along with the expander, the patient would have an appliance like braces or clear aligners to move the teeth into proper position. 

Dr. Travis R. Willey

Treating a crossbite with braces

A very common way to correct both posterior and anterior crossbites is with orthodontic treatment on the upper and lower teeth.

palate expander
A palate expander is a common treatment

Crossbite braces commonly use a palate expander. This is a device that works on widening the upper jaw so that the top teeth will sit properly in line with the lower teeth.

Palate expanders need to be adjusted regularly, and in small increments they push the teeth in the upper jaw further apart. There is a rapid expansion method that can achieve the correct position within the space of a few months.

After the palate has been expanded to the correct size, there may be further teeth straightening required. Various kinds of fixed braces can be used for this. Once all of this orthodontic treatment is completed, dental retainers help keep the teeth in place.

Do you want to see what you might look like after crossbite treatment? You can use Invisalign's free SmileView tool to get your smile preview in just two minutes!

smile view invisalign test

Can you fix crossbite without braces?

Not everyone likes the idea of fixed, metal braces. Fortunately, there are alternatives that can be just as effective for many cases, such as invisible aligners or clear brace brackets. Do be aware that anything other than metal braces will require private treatment; the NHS only funds metal braces.

It may also possible to treat a posterior crossbite with just elastics, which you can read more about further down.

Can Invisalign fix crossbite?

For patients with mild to moderate crossbite, Invisalign clear aligner braces can be an effective orthodontic treatment. Unlike metal braces, Invisalign is almost unnoticeable. Plus, there's the added convenience of being able to remove the aligners for up to two hours a day.

In the following video, a patient named Kitty shares the start of her journey with Invisalign, treating overcrowding and crossbite:

This is my honest Invisalign review of my first few weeks with Invisalign. I've filmed a few updates since, including getting attachments and IPR, so subscribe for more videos: CLICK "SHOW MORE" FOR ALL THE DETAILS YOU NEED: Firstly, this video isn't sponsored, I wish it was! It's my honest Invisalign experience from my first few weeks of Invisalign. Yes, it's the truth about Invisalign from the consultation to the first few weeks. I'm actually about halfway through now and I could not be happier with how my teeth look. :o) You'll be able to see more at This is my experience of Invisalign UK. The first few weeks were a bit of a rollercoaster and so I'm sharing my experience of why I chose Invisalign, the consultation, my treatment plan with Clincheck video, the cost (bear in mind everyone is different, but I am receiving Invisalign Full treatment which was a set price at my dental practice),my attachments and IPR experience, eating and drinking, the pain (!), my Invisalign oral hygiene routine: How I keep my Invisalign and teeth clean, teeth whitening with my Invisalign, plus some tips, like how to stop Invisalign hurting and how to stop having that lisp! 0:00 Intro 1:11 Deciding to get Invisalign (vs Traditional braces) 2:50 Overcrowding + Snaggle Tooth 3:19 Crossbite 3:37 Bite Misalignment. 3:58 The cost of Invisalign 4:25 My Clincheck video and treatment Attachments (I have quite a few!) 6:03 Refinements 6:35 What happens after the consultation 7:25 1st Fitting Appointment & Starter Pack 8:07 Optimal Wear 8:15 Pros and cons vs Fixed braces 9:10 Attachments and IPR 10:18 Pain 11:32 The First Week and Buyer's Remorse 12:30 First Check Up 13:10 Hints and Tips (Sharp Edges) 13:52 Eating and drinking with Invisalign 15:40 Aligner and Teeth Cleaning 17:58 Teeth Whitening 18:36 The 2nd Set 19:10 Ask me anything 20:21 My Progress and Pics Links I mention in the video: My blog post and photos: My Dental Practice: Invisalign Progress Story. His Results are amazing: Any questions, just ask in the comments and don't forget to give us a thumbs up, subscribe and share a that really does help our channel. FAQs: About Kitty & B: The awesome music is used with permission: What camera? I film in 4k What do I edit with? I use Final Cut Pro and iMovie How to I make the cool motion titles? I use After Effects and some titles in Final Cut Pro. You can find some templates here: Follow us: Bloglovin': Instagram: Facebook: Twitter: Tumblr: You can get in touch with us at: Kitty & B [email protected] YouTube: #Invisalign #Myinvisalignsmile #ClearBraces #InvisalignUK #UKVlogger #AdultBraces #Teeth #Orthodontics #blackcreators #InvisalignReview2020 #InvisalignUK #KittyandB #CornerhouseDental #Leeds Disclaimer: Some of the links may be affiliate links. This video is not sponsored.

If you're interested in treatment with invisible braces like Invisalign, take a quick test to check whether you're a suitable candidate. Visit Invisalign's website for a free Smile Assessment and get your answer in minutes!

Alternatively you can book an appointment online with an Invisalign dentist near you to discuss your treatment options face to face.

Fixing posterior crossbites with elastics

Crossbite teeth at the back of the mouth can sometimes be fixed with posterior crossbite elastics. This involves the orthodontist fixing a hook to the inside of the top tooth and the outside of the lower tooth, with an elastic band connecting them.

The point of this is to pull the back tooth outwards so that it will sit snugly over the lower tooth like it should. It is a pretty simple process that can take as little as three or four months.

Jaw realignment surgery

jaw realignment surgery
An uneven jaw can be quite noticeable

In more severe cases of crossbite, surgery may be needed. Having an operation can be a worrying experience, but it is a reasonably common procedure. The NHS covers jaw realignment surgery costs in the UK for children, and for some adults.

Crossbite surgery will normally be preceded by a year to eighteen months of braces, and the removal of wisdom teeth, if you have any. This is necessary since the surgery to fix your asymmetrical jaw takes place at the back of your mouth.

In jaw realignment surgery, for adults or children, the jaw is broken and repositioned. Once this is complete, the surgeon adds plates and screws to hold it in place. The incisions are all made inside your mouth so there shouldn’t be any visible scarring.

Crossbite surgery recovery takes six to 12 weeks. After this, a further 4-6 months of orthodontic treatment may be needed.

To help calm any nerves you or your child might have, you can ask your dentist to show you pictures of crossbites before and after surgery. Seeing these should help you understand what the crossbite treatment results will be like.

How much does crossbite surgery cost?

Crossbite is normally treated in childhood, in which case it is free on the NHS. But, there can be reasons why you make it to adulthood and still have a unilateral or bilateral crossbite.

Because of the problems that are associated with not receiving crossbite correction, you may be able to still get this treatment through the NHS. It is worth speaking to your dentist about your options. If you are eligible for NHS jaw realignment surgery and braces, the cost will be £282.80 in England (the Band 3 treatment charge). 

You may discover you are not eligible for NHS crossbite surgery as an adult, or you may prefer to be treated privately. Private jaw realignment surgery costs in the UK are based on a lot of variables, which all contribute to crossbite surgery costs.

The total cost of jaw surgery can be anything from £2,500, and possibly much higher. Your dentist or surgeon will provide you with an accurate quotation.

What problems can a crossbite cause?

uneven jaw
It's best to seek treatment at a young age

Crossbite teeth might not seem like a big problem aesthetically, but not getting the correct crossbite treatment can store up problems that will affect your oral health later in life. There are lots of problems associated with a posterior or anterior crossbite, such as:

  • Increased risk of tooth decay
  • Gum disease
  • Excessive wear on gums and teeth
  • More chance of grinding teeth, or bruxism
  • Cheek biting when trying to eat food
  • Higher chances of headaches due to tension
  • An asymmetrical jaw

Because of the risks that come with an untreated crossbite, it is likely that NHS orthodontic treatment will be offered. Find more information about what the NHS can offer here

Can you fix crossbite in adults?

It is never too late to get your teeth fixed and straightened. All of the procedures mentioned here – braces, elastics, surgery – can be used for crossbite treatment in adults too. If being treated with braces, many adults opt for clear braces or invisible aligners to make their treatment less conspicuous.


Crossbite is a relatively straightforward dental problem to fix, a little simpler in children than adults. Listening to your dentist talk about crossbite treatment might seem intimidating, but if you don’t understand it’s ok to ask questions. The treatment will pretty much always require having something fitted in your mouth, whether it's hooks for posterior crossbite elastics, braces, or metal plates from surgery.

Remember, getting crossbite braces doesn't necessarily mean having metal brackets fixed to your teeth. Clear aligners are an effective treatment for many patients with a crossbite. To check whether you're eligible for treatment with Invisalign invisible braces, take your free Smile Assessment now.

If you'd prefer an in-person consultation, find your nearest Invisalign dentist to book your first appointment and get a treatment plan.


What causes a crossbite?

A crossbite can occur because of genetic factors but it may also be caused by things like thumb sucking and mouth breathing. Teeth overcrowding is another factor that can contribute.

How much does it cost to fix a crossbite?

Crossbite treatment is often available on the NHS because of the possible complications if left untreated. Children can get NHS treatment for free, and even adults may be eligible.

Crossbite Teeth: Treating an Uneven Jaw with Surgery or Braces
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Amanda specialises in writing informative content about dentistry. She has been a regular contributor to since 2017, and collaborates with dozens of dentists to keep this content accurate and up-to-date.
Dr. Travis R. Willey completed his undergraduate studies at the University of Utah where he received a Bachelor of Science degree in Medical Biology. He attended Marquette University School of Dentistry where he graduated with his Doctorate of Dental Surgery degree. Dr. Willey’s professional interests include Family, Cosmetic and Implant Dentistry. Growing up in the Rocky Mountain region, Dr. Willey knew that he wanted to live and practice near the mountains. He is one of the dentists at Family & Cosmetic Dentistry of the Rockies in Fort Collins, Colorado.
NHS: Orthodontics Overview. Consulted 27th May 2019 The Angle Orthodontist: Long-term Stability of Unilateral Posterior Crossbite Correction. Consulted 27th May 2019 Mayo Clinic: Jaw Surgery. Consulted 27th May 2019 Science Direct: Crossbite. Consulted 27th May 2019