First Time User? Enroll now.
COVID-19: Vaccine information, visitor restrictions, testing, monoclonal antibody therapy, and additional resources
Home > Fitness & Health > Health Library > Malocclusion and Orthodontics
Malocclusion means having crooked teeth or a "poor bite." Bite refers to the way the upper and lower teeth line up. In a normal bite, the upper teeth sit slightly forward of the lower teeth. Very few people have a perfect bite.
Most of the time, malocclusion is a cosmetic problem, which means that people don't like the way their teeth look. But it can also have a serious impact on self-esteem. Plus, crooked teeth can be hard to take care of, which may lead to tooth decay or tooth loss. When malocclusion is severe, it can even cause problems with eating or speaking.
Malocclusion is usually caused by problems with the shape or size of the jaw or teeth. A common cause is having too much or too little room in the jaw. If a child's jaw is small, the teeth may grow in crowded or crooked. If there's too much space in the jaw, the teeth may drift out of place.
Other causes of malocclusion include thumb-sucking, pacifier use, and tooth loss. Long-term mouth breathing seems to be linked to malocclusion too, but how isn't exactly clear.
The most obvious sign is teeth that are crooked or stick out. But there are many different types of malocclusion. Some people have buck teeth (called an overjet). This means that the upper front teeth are pushed outward. Others have an underbite. Their lower front teeth sit farther forward than their upper front teeth.
A dentist usually checks for malocclusion in children during regular dental visits. If the jaw or teeth are out of line, the dentist may suggest a visit to an orthodontist.
An orthodontist will:
Orthodontic treatment can correct the way teeth and jaws line up. That may help a person feel better about their appearance, and also makes the teeth easier to take care of. Dentists who are specially trained to correct malocclusion are called orthodontists. They use a variety of tools and techniques to move teeth, and sometimes the jaw, into the right position.
In children and teens, crowding in the mouth is the most common problem. So the first step in treatment may be to remove some baby teeth to make room for the permanent teeth to grow in. Orthodontists avoid removing permanent teeth when possible.
Some children may need an early treatment called growth modification. For this, the child wears a device that helps move the jaw into a better position. This treatment works best during a child's growth spurts.
Braces or other devices can be used to slowly move the teeth to correct the bite. This can also help move a child's jaw into the right position.
Braces or other devices can straighten an adult's teeth too.
Teeth naturally tend to drift out of place, even after treatment with braces. So you may need to wear a device in your mouth called a retainer to keep your teeth from moving. Some people need to use retainers for many years after treatment.
Current as of:
June 30, 2021
Author: Healthwise StaffMedical Review: Adam Husney MD - Family MedicineMartin J. Gabica MD - Family MedicineWilliam F. Hohlt DDS - Orthodontics
Current as of: June 30, 2021
Author: Healthwise Staff
Medical Review:Adam Husney MD - Family Medicine & Martin J. Gabica MD - Family Medicine & William F. Hohlt DDS - Orthodontics
To learn more about Healthwise, visit Healthwise.org.
© 1995-2022 Healthwise, Incorporated. Healthwise, Healthwise for every health decision, and the Healthwise logo are trademarks of Healthwise, Incorporated.
Feeling under the weather?
Use our interactive symptom checker to evaluate your symptoms and determine appropriate action or treatment.
Our interactive Decision Points guide you through making key health decisions by combining medical information with your personal information.
You'll find Decision Points to help you answer questions about:
Get started learning more about your health!
Our Interactive Tools can help you make smart decisions for a healthier life. You'll find personal calculators and tools for health and fitness, lifestyle checkups, and pregnancy.