Can Invisalign Fix an Excessive Overbite?

Yes, Invisalign can fix a minor to moderate overbite.

An excessive overbite is a common dental issue affecting about 22% of people worldwide.¹ Clear aligners like Invisalign have become a popular option for correcting overbites. 

However, studies show that Invisalign may be less effective for a severe overbite.² Your dentist may recommend an alternative for a severe overbite, such as traditional braces.

What is an Overbite?

An overbite occurs when the upper front teeth extend significantly beyond the lower front teeth. It has various causes, including genetic factors and developmental oral habits such as thumb-sucking.

While some degree of an overbite is necessary for a functional bite, it shouldn’t exceed 2 to 3 mm. A significant overbite may cause discomfort on the roof of the mouth and speech impediments.

A mild to moderate overbite ranges from 4 to 8 mm and can be treated with clear aligners. Anything beyond 8 mm might require more intensive treatment, such as conventional braces.

How Does Invisalign Fix an Excessive Overbite?

Clear aligners like Invisalign are custom-made plastic trays that fit over your teeth. You’ll wear them for 20 to 22 hours a day, removing them only for eating, drinking, and brushing your teeth. 

Invisalign works by applying gentle pressure to realign your teeth. You’ll get new trays regularly to increase the force. Your jawbone will respond by shifting as your teeth move, gradually correcting the excessive overbite. 

How Long Does it Take for Invisalign to Fix an Excessive Overbite?

Invisalign takes anywhere between 6 and 18 months to see results. How quickly clear aligners can correct your excessive overbite depends on its severity.

Treatment times vary widely based on several factors, including:

• The severity of your overbite — You might notice changes in a milder overbite after only 6 months. A more severe overbite could take up to 2 years to shift.
• How closely you follow your dentist’s instructions — If you wear your Invisalign 20 to 22 hours a day as instructed, you’re more likely to see results faster. If you don’t wear your aligners reliably, it can delay results.
• Other dental issues — If you have other issues you’re correcting with Invisalign, it can take longer.
• Age — Adults’ teeth and jawbones typically move slower than children’s, whose oral structures are still developing.

When to Choose Invisalign vs. Braces

Invisalign is an excellent option for people with mild to moderate overbites. However, people with severe overbites may not be the best candidates for clear aligner treatment.

Traditional metal braces or discreet ceramic braces may be better in cases like this. According to research, braces exert more force to move teeth than aligners and are potentially more effective overall.³ They remain the most common treatment for overbites.

You may wish to consider traditional metal braces instead of clear aligners if you:

• Have an overbite greater than 8 mm
• Are an adult whose jaw is no longer developing
• Have multiple teeth alignment issues at once
• Aren’t sure you’ll wear your aligners reliably

Always consult your orthodontist on whether clear aligners are right for you.

Why Should I Fix an Excessive Overbite?

Technically, most people have overbites, but they’re moderate — 2 to 4 mm. Overbites of 4 to 6 mm or greater may require orthodontic treatment.

Many people fix their overbites for cosmetic reasons. However, research shows overbites can also have a negative impact on oral health, especially for children and adolescents.⁵

Misaligned teeth can contact the wrong parts of the mouth, leading to dental issues such as:⁶

• Cavities and tooth decay
• Worn or eroded enamel
• Gum disease
• Speech impediments
• Damage to the roof of the mouth 
• Jaw pain, which can lead to temporomandibular joint disorder (TMD)

Discuss your treatment options with your dentist if you have an excessive overbite.

Summary

Invisalign is an effective treatment for mild to moderate overbites. Clear aligners correct an excessive overbite by applying gradual pressure on the teeth. It can take anywhere from 6 to 18 months to achieve full results. 

Traditional metal braces may be a more appropriate treatment for severe overbites. Dentists usually recommend treating an excessive overbite to avoid potential dental issues such as tooth decay, gum disease, and enamel erosion.