Turner Tooth

Sometimes, a child’s adult tooth can grow in looking different—discoloured, oddly shaped, or with missing enamel—and it can come as a surprise. This condition is called a Turner tooth, and it often starts with an issue in a baby tooth that affects the one growing underneath. Many parents aren’t aware this can happen, which is why it’s helpful to know what to look out for. In this article, Dr Ellie Nadian provides you with clear answers about what causes a Turner tooth, how it develops, and what can be done about it.

What Is a Turner Tooth?

A Turner tooth is a permanent tooth that didn’t develop properly because of an infection or injury to the baby tooth on top of it. This damage usually affects the enamel, which is the hard outer layer of the tooth, and can make the adult tooth look discoloured, misshapen, or have pits or grooves. It most often affects the front teeth or premolars and is typically a result of trauma, like a knocked or pushed-in baby tooth or a severe infection in a baby tooth. The adult tooth underneath can be affected because it starts forming while the baby tooth is still in place. Turner teeth aren’t always painful, but they might need treatment to protect them or improve how they look.

What Causes a Turner Tooth?

A Turner tooth usually develops because something disrupted the normal formation of an adult tooth while it was still developing beneath a baby tooth. The most common causes include:

Trauma to the Primary Dentition

Injuries to baby teeth are a common reason why a Turner tooth might develop. When a child falls or bumps their mouth, the force can reach the developing adult tooth underneath. This can interrupt how the adult tooth forms, especially the outer enamel layer. Even if the baby tooth seems fine, the adult tooth below might still be affected.

Injuries Between the Ages of 2 and 7 Years

The risk of developing a Turner tooth is highest between the ages of 2 and 7. That’s because, during this time, many adult teeth are forming just under the baby teeth. A knock or infection during these years can interfere with the way the adult tooth grows. That’s why early dental checks after any injury are so important.

Luxation and Intrusive Luxation Injuries

When a baby tooth is pushed out of position (luxation) or forced up into the gum (intrusive luxation), the tooth bud of the adult tooth underneath can be damaged. These types of injuries often happen in toddlers who are still learning to walk and are more likely to fall face-first. The closer the baby tooth root is to the developing adult tooth, the greater the chance of a Turner tooth forming.

Periapical Inflammation of Primary Teeth

A deep cavity or untreated infection in a baby tooth can lead to inflammation around the root tip—this is called periapical inflammation. If this happens, the infection and swelling can affect the adult tooth growing beneath it. This may result in weak or damaged enamel on the adult tooth.

Oral Surgical Procedures

In some cases, dental surgeries involving baby teeth may impact the developing adult tooth. For example, surgery to remove a badly damaged baby tooth might disturb the nearby adult tooth bud. While this isn’t common, it’s a known cause of Turner teeth. An experienced Brisbane Paediatric Dentist can lower this risk with careful planning and gentle techniques during treatment.

Injury to a Baby Tooth

Even a single hit to a baby tooth can harm the adult tooth forming underneath it. The trauma might not always cause pain or obvious damage to the baby tooth. But inside the gum, the adult tooth may grow in with discolouration, an odd shape, or thin enamel. It’s a good idea to have any dental injury checked by a professional dentist, even if it seems minor.

Infection in a Baby Tooth

An untreated infection in a baby tooth can spread to the surrounding tissue and reach the developing adult tooth. This may happen with large cavities or abscesses that go unnoticed. Once the infection reaches the adult tooth bud, it can change how the tooth forms. Regular check-ups and early treatment of baby tooth decay are key to prevention.

Inflammation or Pressure

Swelling around an infected or injured baby tooth can put pressure on the adult tooth growing beneath it. That pressure might disturb the normal growth of enamel or dentine in the adult tooth. This can lead to a Turner tooth with visible changes in appearance.

Dental Procedures on Baby Teeth

Sometimes, dental treatment such as fillings or drilling in baby teeth might be done very close to the tooth’s root. If the procedure is deep, it can affect the developing adult tooth right underneath. This is rare, but it’s one reason dentists take great care when treating young children’s teeth.

Timing of the Trauma or Infection

The age at which the injury or infection happens can make a big difference. If the baby tooth is affected while the adult tooth is still forming, the risk of a Turner tooth is higher. Earlier injuries tend to cause more noticeable changes in the adult tooth. The closer the event is to the time the adult tooth erupts, the more likely it is that the damage will show.

Traumatic Extraction of Primary Molars

Sometimes, baby molars need to be removed if they’re badly damaged or infected. If the extraction is difficult or forceful, it can disturb the nearby adult tooth bud. This can cause defects in the adult tooth’s structure or colour. Dentists use gentle methods to minimise this risk, but it’s still something to be aware of.

Endotracheal Intubation in Neonates

In rare cases, babies who needed breathing tubes (endotracheal intubation) as newborns may develop Turner teeth in their front teeth. The pressure from the tube resting against the developing teeth in the upper jaw can interfere with enamel formation. This is more likely in premature babies or those with long hospital stays. Parents and dentists should keep an eye on the child’s teeth as they grow.

What Does a Turner Tooth Look Like?

A Turner tooth often looks different from the surrounding teeth because its enamel didn’t form properly. It might appear discoloured—white, yellow, or brown—or have visible spots, grooves, or pits on the surface. In some cases, the tooth may be smaller than normal or have an unusual shape. These changes are usually seen in one tooth, most often a front tooth or a premolar, and the appearance depends on how much the development was affected.

Diagnosing a Turner Tooth

They’ll Ask About Your Child’s Dental History

Your friendly kids’ dentist will ask if your child has ever had an injury to their baby teeth, such as a fall or bump. They’ll also want to know if there were any infections, deep cavities, or baby teeth that had to be removed early. This information helps them understand what might have affected the adult tooth developing underneath.

They Look Closely at the Tooth

Using a bright light and a small mirror, the dentist checks the tooth for any changes in colour, shape, or texture. They look for things like white spots, yellow or brown staining, or areas that seem uneven. These are common signs of a Turner tooth.

They Gently Feel the Tooth

The dentist may use a small tool to feel the surface of the tooth. This helps them check if the enamel is rough, soft, or thinner than usual. These small details give clues about how well the enamel formed while the tooth was developing.

They Check How the Tooth Came Through

If the tooth came in later than expected or is not in the right position, it might mean its development was affected. The dentist checks for delayed eruption or unusual alignment, which can sometimes be linked to early damage to the baby tooth above.

They Might Take an X-Ray

A quick, low-dose X-ray can show what’s happening inside the tooth. This helps the dentist see if the root looks normal and whether the inside layers of the tooth developed properly. It also helps rule out other possible causes of the problem.

They Make Sure It’s Not Something Else

Some other dental conditions—like fluorosis or enamel hypoplasia from other causes—can look a bit like a Turner tooth. The dentist will carefully consider all the signs to make sure the diagnosis is correct. This step is important for choosing the right treatment if needed.

They May Want to Keep an Eye on It

If the tooth isn’t causing any pain or problems with eating or brushing, the dentist might suggest watching it over time. Regular check-ups help make sure the tooth stays healthy and allow for treatment later on if needed for appearance or strength.

What Are the Treatment Options for a Turner Tooth

A Turner tooth doesn’t always need treatment—it depends on how much the enamel is affected. If the tooth is sensitive, prone to cavities, or looks noticeably different, your dentist may suggest options like bonding or a crown. Regular check-ups help monitor the tooth and decide if treatment is needed later on.

Mild Cases

In mild cases, the enamel defect may only affect the colour or texture of the tooth without causing any pain or structural issues. Dentists may smooth out rough areas or apply a fluoride varnish to strengthen the enamel and reduce sensitivity. If the appearance is a concern, tooth-coloured resin may be used for cosmetic improvement. These treatments are simple, non-invasive, and often done in a single visit.

Moderate Cases

When a Turner tooth shows more noticeable damage—such as deeper pits, worn enamel, or early signs of decay—a filling or bonding material may be used to restore its shape and function. These materials blend with the natural tooth colour and protect the inner parts of the tooth. In some cases, dentists may also place a small composite veneer to improve the tooth’s appearance and durability.

Severe Cases

If the enamel defect is extensive and the tooth is weak, cracked, or highly sensitive, a dental crown may be needed to protect it. A crown covers the entire tooth, helping restore its strength and appearance, especially if the tooth is at risk of further damage. In young children, stainless steel crowns are sometimes used as a temporary option, with ceramic or porcelain crowns considered later.

Root Canal Therapy

In rare cases where the Turner tooth has deep damage that reaches the pulp (the inner part of the tooth), root canal treatment may be needed. This procedure removes the damaged tissue inside the tooth, relieves any pain, and helps save the tooth. After the root canal, a crown is usually placed to protect the remaining structure. Paediatric dentists or specialists called endodontists usually handle this kind of treatment in children.

What Should Parents Know?

• Trauma or infection to a primary tooth, especially a front one, can damage the permanent tooth developing underneath. This is because the permanent tooth bud is located close to the primary tooth’s root.
• The risk of damage to the permanent tooth (resulting in a Turner tooth) following primary tooth trauma is high, reported in studies to be as high as 46%, particularly affecting upper incisors. This is more likely with certain types of injuries, like intrusion.
• Your dentist will inform you about the possibility of this occurring after your child’s primary tooth is injured. This is a crucial part of the information provided following a traumatic dental injury.
• A Turner tooth may show up as discolouration or a defect in the enamel when the permanent tooth eventually erupts.
• Sometimes, a primary tooth might need to be extracted following trauma or infection specifically to protect the developing permanent tooth bud from further damage.
• If the permanent tooth does erupt with a defect, it can often be treated with restorative procedures like fillings or bonding to improve its appearance.
• It’s important to attend follow-up appointments so the dentist can monitor the healing and the eruption of the permanent tooth.

Frequently Asked Questions

Can Turner’s Tooth Be Prevented?

While not always preventable, prompt treatment of baby tooth injuries or infections can reduce the risk. Regular dental check-ups and protective measures during activities can help safeguard developing permanent teeth.

Is It Caused by Something I Did Wrong as a Parent?

Turner teeth result from unforeseen injuries or infections to baby teeth. Such incidents are common in young children and not a reflection of parental care.

Does a Turner Tooth Always Need Treatment?

Not necessarily. Mild cases may not require intervention, but monitoring is essential. Treatment is considered if the tooth is sensitive, at risk of decay, or affects appearance.

Will the Adult Tooth Grow Normally if the Baby Tooth Was Damaged?

It depends on the severity and timing of the baby tooth damage. Early injuries may affect the developing permanent tooth’s enamel, leading to defects.

Can My Child Still Eat Normally with a Turner Tooth?

Yes, in most cases. If the tooth is sensitive or structurally compromised, a dentist can provide treatments to restore function and comfort.

How Do I Know If My Child Has a Turner Tooth?

Signs include discolouration, pits, or grooves on a permanent tooth. A dentist can confirm the diagnosis through examination and possibly X-rays.

Is a Turner Tooth Painful for My Child?

Typically, Turner teeth are not painful. However, if enamel defects expose sensitive areas, your child may experience discomfort.

Can the Colour or Shape of the Tooth Be Fixed?

Yes, cosmetic dental treatments like bonding, veneers, or crowns can improve the appearance of a Turner tooth. The choice depends on the defect’s severity.

Is There a Risk of the Same Thing Happening to Other Teeth?

Turner teeth typically affect only one tooth associated with the injured or infected baby tooth. Other teeth are usually not at risk unless they experience similar trauma.

Can Fluoride Help a Turner Tooth?

Fluoride treatments can strengthen enamel and reduce sensitivity in Turner teeth. While they don’t reverse defects, they help protect the tooth from decay.

Will It Affect My Child’s Confidence?

Visible defects in front teeth can impact a child’s self-esteem. Dental treatments can address these concerns effectively.

How Early Should I Take My Child to the Dentist After a Baby Tooth Injury?

Immediately. Prompt dental evaluation after a baby tooth injury can prevent or minimise damage to the developing permanent tooth.

Are X-rays Safe for Children When Checking for This Issue?

Yes — dental X-rays are considered safe for children when used properly. They use a very low level of radiation and are an important tool for diagnosing conditions like Turner teeth, where the underlying adult tooth may be affected by earlier trauma or infection. Dentists follow strict safety guidelines to protect children during X-rays. The benefits of early and accurate diagnosis far outweigh the minimal risk involved.

Can Braces Still Be Used if a Turner Tooth Is Present?

Braces can still be used even if a Turner tooth is present. Before starting treatment, your dentist or orthodontist will check the condition of the affected tooth — including its strength, shape, and root development — to decide the safest and most effective way to move the teeth.

Will My Child Need Regular Follow-Ups for a Turner Tooth?

Regular dental check-ups are important to monitor the Turner tooth’s condition and address any emerging issues promptly.

Is a Crown or Veneer Safe for a Child or Teen?

Yes, crowns or veneers can be safely used in children and teens when needed — especially for teeth that are damaged or affected by conditions like Turner tooth. However, because younger patients’ teeth and jaws are still developing, the dentist will carefully assess the timing and choose a treatment that protects both function and future growth. The best option depends on the tooth’s condition, age, and long-term needs.

Can This Tooth Be Lost Earlier Than Usual?

If severely compromised, a Turner tooth may be at risk of early loss. However, with proper care and treatment, it can often be preserved.

Is a Turner Tooth a Sign of Poor Overall Dental Health?

No, a Turner tooth results from localised trauma or infection and doesn’t necessarily reflect overall dental health. Maintaining good oral hygiene is still essential.

Looking After Young Smiles Starts Early

If your child has had a baby tooth injury or infection, it’s a good idea to have their teeth checked—especially if you’re noticing anything unusual about a permanent tooth. Turner teeth can be managed with the right care, and early attention makes a big difference. Our experienced Brisbane team is here to help with gentle advice and thoughtful treatment tailored to your child. Call us on (07) 3343 4880.