Amelogenesis imperfecta: Symptoms, causes and treatment

Some teeth look yellow, brown or pitted no matter how carefully you brush. One reason is amelogenesis imperfecta, a group of genetic conditions that affect how tooth enamel forms, which can leave teeth discolored, sensitive and more prone to wear and chipping.¹^,² Your dental provider can help you work out what’s behind the changes and plan how to protect your teeth. 

What you'll learn in this article: 

• What causes amelogenesis imperfecta and how its types differ 

• Which symptoms and enamel changes you may notice 

• How dentists use your history, an exam and other tests 

• How care can protect comfort, appearance and chewing 

If you're noticing enamel concerns, schedule an appointment with an Aspen Dental provider to discuss your teeth and next steps. 

What causes amelogenesis imperfecta? 

Amelogenesis imperfecta involves changes in genes that control how tooth enamel develops. Some of these genes help proteins and minerals work together to harden enamel. Changes in them can affect how much enamel forms or how strong it becomes.² 

Enamel is the protective outer covering of your teeth. When it doesn’t develop normally, the tooth may be more vulnerable to wear, breakage and sensitivity. Both baby teeth and permanent teeth can be affected.¹^,² 

The condition comes from changes in genes, not from skipped brushing. Daily care still matters, but someone can brush carefully and still have enamel changes that began as the teeth were forming.² 

What are the types of amelogenesis imperfecta? 

“Weak enamel” can describe different problems. The main differences involve the amount of enamel and how well it hardens: 

• Too little enamel: In the hypoplastic form, the enamel is thin, so less of it protects the tooth. 

• Weak or brittle enamel: In the hypomaturation form, the enamel is often close to normal thickness but weaker, so it chips more easily. 

• Soft enamel: In the hypocalcified form, the enamel may be a normal thickness but too soft, so it wears down and chips more easily.¹^,² 

Some forms combine features.¹ Having a normal-looking amount of enamel doesn’t necessarily mean it has normal strength, and thin enamel doesn’t tell the whole story either. Your dentist looks at both when planning care.² 

What are the symptoms of amelogenesis imperfecta? 

The appearance and severity vary. Your dentist may find several changes together or a milder pattern that is less obvious: 

• Surface differences: Teeth may have pits, grooves or rough areas. 

• Color changes: Enamel may look chalky, yellow, brown or otherwise discolored. 

• Sensitivity: Hot or cold foods and drinks may be uncomfortable, and brushing can hurt. 

• Chipping or wear: Teeth may lose structure more easily than expected. 

• Bite differences: Some people have an open bite, where certain upper and lower teeth don’t meet when the mouth closes.¹^,² 

Enamel breakdown from this condition isn’t the same as tooth decay, although both can occur in the same mouth. Your dentist needs to distinguish a developmental defect from damage caused by decay or other factors.² 

Changes in appearance can be frustrating, too. If you’re avoiding smiling or certain foods, mention that alongside any pain. Those concerns belong in the treatment conversation.¹^,²

How is amelogenesis imperfecta diagnosed? 

A dentist examines the enamel and asks when the changes first appeared. Family history can provide clues, so mention relatives who have had similar problems with tooth color, sensitivity or wear. Dental X-rays may help assess tooth structure and enamel thickness. Genetic testing can sometimes identify the responsible genetic change and help clarify the type.² 

An exam also helps separate this condition from other explanations for unusual enamel, such as genetic disorders that affect tooth color or damage from other causes.³ The pattern across the teeth and your developmental and dental history matter; a discolored tooth alone isn’t enough to make the diagnosis. 

If the findings suggest a genetic condition, your dentist can discuss whether a specialist or genetic evaluation would be useful. You don't need to work out the inheritance pattern yourself before seeking care. 

How is amelogenesis imperfecta treated? 

Treatment depends on the enamel, the amount of damage, your symptoms and whether the teeth are primary or permanent. Options may include bonding, veneers or crowns to protect or restore affected teeth and improve their appearance. Orthodontic treatment may help when the bite also needs attention.²  

Protection and comfort matter alongside appearance. If tooth sensitivity makes brushing difficult, tell your dentist. They may recommend a desensitizing toothpaste and help you find a daily routine you can tolerate. Keep brushing and cleaning between your teeth as directed.² 

Care may involve several appointments or stages, particularly as children grow and permanent teeth come in. Ask which concerns need attention now, what can be monitored and how future treatment might change. A plan should account for your needs rather than assume every affected tooth requires the same restoration.² 

For help understanding enamel changes and your treatment options, schedule an examination with your local dental provider. 

Amelogenesis imperfecta: Symptoms, causes and treatment FAQs 

Can it happen without a family history? 

Yes. A gene change can occur by chance, so a family history isn’t required. Inheriting it from a parent is more common, and some forms require a gene change from both parents.² Not knowing anyone in your family with similar teeth doesn’t rule it out. 

Will every child of an affected parent inherit it? 

Not necessarily. The chance depends on the gene involved and the inheritance pattern.² There isn’t one percentage that applies to every family. A genetic counselor can explain what a diagnosis or test result means for your situation. 

Can teeth whitening help with discoloration? 

It may be an option for some people, but it won't repair the enamel defect. Your dentist can assess whether whitening, bonding or another approach fits your teeth.² Whitening can also cause temporary sensitivity, so discuss existing discomfort before using a bleaching product.³ 

Sources 

¹ National Library of Medicine, MedlinePlus Genetics: “Amelogenesis imperfecta.” https://medlineplus.gov/genetics/condition/amelogenesis-imperfecta/ 

² Cleveland Clinic: “Amelogenesis Imperfecta.” https://my.clevelandclinic.org/health/diseases/amelogenesis-imperfecta 

³ American Dental Association: “Whitening.” https://www.ada.org/resources/ada-library/oral-health-topics/whitening