Overview
Missing teeth often run in families. Many missing teeth can be part of a genetic condition.
Extra teeth can block other teeth from coming in.
Symptoms
Common signs:
- Missing or extra teeth
Less common
- Gaps
- Crowding
- Bite problems
When to get medical care
Causes
Genes.
Does it spread or run in families?
- It isn't contagious. You can't catch it from someone else.
- It can run in families. Tell your doctor if a parent, brother, or sister has it.
Who is more likely to get it
- Family history
Diagnosis
Dental X-rays find them.
Questions you may be asked
- Family history
The exam
Mouth exam.
Tests
Tests, if needed:
- Dental X-rays:
Treatment
Plan with your dentist.
Self-care
- Keep baby teeth healthy if no adult tooth is coming
- See an orthodontist for spacing
Prevention
To lower your risk or prevent problems:
- There is no known way to prevent it. Early checkups help find it sooner.
Which doctor treats this
- Start with your dentist.
Back to school, work, or sports
- Most people can go back to school or work the same day or the next day.
Children, pregnancy, and older adults
- Children: Most planning happens in the teen years.
Pregnancy and breastfeeding
- If you're pregnant or planning to be, tell your prenatal provider about this condition.
- Don't start or stop any medicine on your own. Some are safe in pregnancy and some need to be changed.
- Ask before taking any pain reliever. The FDA advises avoiding ibuprofen and naproxen after 20 weeks unless your doctor says to.
- Breastfeeding: Most medicines are fine, but ask. The NIH LactMed database lists what's known about each one.
Outlook
Very fixable.
Implants and bridges work well.
Getting ready for your visit
Bring a list of your symptoms and medicines.
Questions to ask
- What are the options?
- When should treatment start?
Research studies
Research studies test new ways to find and treat health problems. Some are looking for volunteers. Talk with your doctor before joining one.
Search ClinicalTrials.gov for studies on Missing or extra teeth
Sources
Last updated 2026-11-12.