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What is an underbite?

An underbite is also called a Class III malocclusion. This means that the lower jaw juts out, causing the lower teeth to overlap (and close in front of) the upper teeth. This is caused by a problem with how the jaw bones are aligned. Alignment problems are often due to a problem with the size of the upper or lower jaw bone, which can be passed down in families. An underbite can make activities, such as eating, speech and closed-mouth breathing, difficult. It can also lead to stress on the jaw bones and muscles. If treatment is needed, it may include braces, other dental work or orthodontics, or surgery.

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Important: This content reflects information from various individuals and organizations and may offer alternative or opposing points of view. It should not be used for medical advice, diagnosis or treatment. As always, you should consult with your healthcare provider about your specific health needs.