Hyperdontia

Overview

Hyperdontia means having more teeth than usual. It is also called extra teeth or supernumerary teeth. The extra tooth can be visible in the mouth or hidden inside the jawbone. Many people with hyperdontia have no problems, and it is often found during a routine dental check-up or X-ray.

Hyperdontia is not common. It is more often noticed in children and teenagers, but adults can have it too, sometimes without knowing.

Symptoms

Common symptoms

• No symptoms at all
• An extra tooth visible behind or beside the normal teeth
• Crowded or overlapping teeth
• A baby tooth or adult tooth that is late to come through
• A tooth that comes through in the wrong place
• Sore gums or trouble cleaning around the extra tooth
• A change in the bite or how teeth fit together

Symptoms in children

• A double row of teeth
• Baby teeth that stay longer than expected
• Adult teeth that are slow to appear
• Crowding or a tooth pushed out of line
• Speech or chewing changes if the extra tooth is in the way
• Finding an extra tooth on a dental X-ray

Symptoms in older adults

• An extra tooth found by chance on a dental X-ray
• Crowding that slowly gets worse
• Gum irritation around a partly erupted extra tooth
• A cyst or area of damage around a hidden extra tooth, found by a dentist
• Problems with dentures or dental work if an extra tooth is in the way

Causes

Main causes

• Extra tooth buds form while teeth are developing before birth and in early childhood.
• Genetic factors are thought to play a role.
• Sometimes hyperdontia is part of a genetic condition that affects teeth and bones.
• In many cases, no clear cause is found.

Risk factors

• A family history of extra teeth
• Certain inherited conditions, such as conditions that affect skull and bone development
• A cleft lip or cleft palate
• Being male, in some types of hyperdontia

When to see a doctor

See a doctor urgently if:

• You have facial swelling, fever, or pus in the mouth
• You have severe mouth pain that is getting worse
• You have trouble breathing, swallowing, or opening your mouth
• A tooth is knocked out or badly broken after an injury

Book a routine appointment if:

• You or your child has an extra tooth visible in the mouth
• A baby tooth falls out but no adult tooth appears
• Teeth look crowded, uneven, or out of place
• A dentist finds an extra tooth on an X-ray
• You have sore gums or trouble cleaning around a tooth

Diagnosis

A dentist usually diagnoses hyperdontia by looking in your mouth and taking dental X-rays. X-rays show teeth that are hidden under the gums or inside the jawbone. Sometimes you may be referred to a specialist, such as an orthodontist or oral surgeon, for more tests.

Tests that may be done

• Dental examination
• Dental X-rays, such as a panoramic X-ray
• A 3D scan (cone beam CT) in some cases, to see the exact position of the extra tooth
• A review of your dental and medical history
• Referral to a specialist if treatment is being considered

What to expect at your appointment

The dentist will count your teeth, check how they fit together, and look for signs of crowding or damage. They will explain where the extra tooth is and whether it needs to be watched or treated. You can ask questions and discuss the options before any treatment.

Treatment

Not every extra tooth needs treatment. If the extra tooth is not causing problems, your dentist may simply check it at routine visits. If it is causing crowding, pain, gum problems, or damage to other teeth, treatment may be recommended. The plan depends on your age, the position of the extra tooth, and your overall dental health.

Self-care at home

• Brush your teeth twice a day with fluoride toothpaste.
• Clean between your teeth daily with floss or another method your dentist recommends.
• Use a soft toothbrush and be gentle around sore gums.
• Check your mouth for new lumps, swelling, or sore spots.
• Keep routine dental appointments, even if nothing hurts.
• Do not try to remove an extra tooth yourself.

Medical treatments

There is no medicine that makes an extra tooth go away. Treatment is done by dental professionals. Options include watching the tooth over time, removing it with a minor dental procedure, and orthodontic treatment to straighten crowded teeth. If there is an infection, the dental team will treat it and give advice about pain relief. Always ask your dentist or pharmacist before taking any medicine.

When is surgery considered?

Surgery may be suggested if an extra tooth is blocking a normal tooth from coming through, causing crowding or bite problems, damaging the roots of other teeth, causing a cyst, making cleaning difficult, or getting in the way of orthodontic treatment. Removal is usually a minor procedure, but the dentist or oral surgeon will explain the risks and benefits.

Living with this condition

Most people with hyperdontia live normal lives. You may need extra dental check-ups or cleaning around the extra tooth. If treatment is planned, your dental team will tell you what to expect and how to care for your mouth afterwards.

Lifestyle tips

• Keep up good daily mouth care.
• Wear a mouthguard for sports if your dentist advises it.
• Avoid using your teeth to open packages or bite hard objects.
• Attend dental appointments as recommended.
• Ask your dentist before starting any new dental product or home remedy.

Diet and exercise

A healthy diet and regular exercise support your general health. For your teeth, limit sugary snacks and drinks, especially between meals, and drink water. Exercise is not restricted by hyperdontia, but use a mouthguard for contact sports if your dentist recommends one.

Mental health and emotional wellbeing

Some people feel self-conscious about an extra tooth or crowded teeth. Dental visits can also feel stressful. These feelings are common and worth talking about. If worry is affecting your daily life, tell your dentist or your healthcare provider. If you are in crisis or having thoughts of harming yourself, call your local emergency number or a local crisis support service right away.

Prevention

Hyperdontia cannot usually be prevented because it starts during tooth development before birth and in early childhood. Regular dental check-ups help find extra teeth early so they can be watched or treated if needed.

Vaccines

There is no vaccine for hyperdontia.

Screening programmes

Regular dental exams and X-rays when your dentist recommends them are the best way to find extra teeth early. Children and adults with a family history of extra teeth or certain genetic conditions may need closer dental checks.

Complications

If left untreated

• Crowded or crooked teeth
• A normal tooth that is blocked from coming through
• Cavities or gum disease because crowded teeth are harder to clean
• Damage to the roots of nearby teeth
• A cyst or hollow area around a hidden extra tooth
• Bite problems or jaw discomfort
• Infection if a partly erupted tooth is hard to keep clean

Long-term outlook

The outlook is usually very good. Many people with hyperdontia need no treatment or only simple monitoring. If treatment is needed, dental teams can usually manage it well. Early checks and good mouth care help protect your teeth and gums.

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