Adult Tooth Growing Behind Baby Tooth: What Should Parents Do?

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By Pittsford Orthodontics & Pediatric Dentistry | June 26, 2026

You are helping your child brush their teeth when you notice something unusual. A permanent tooth is coming in, but the baby tooth is still sitting right in front of it. Instead of replacing the baby tooth, the new tooth seems to be growing behind it.

While this can look alarming, it is actually a fairly common situation in children. Many parents refer to it as a “shark tooth” because it creates a double row of teeth. The good news is that it does not always mean there is a serious problem.

Why Does a Permanent Tooth Grow Behind a Baby Tooth?

Normally, a permanent tooth develops beneath a baby tooth and gradually dissolves the baby tooth’s root. Once the root disappears, the baby tooth becomes loose and falls out.

Sometimes that process does not happen exactly as expected. The permanent tooth may erupt before the baby tooth is ready to come out. As a result, the new tooth appears behind the existing one.

This most often happens with the lower front teeth, usually between ages six and seven.

Should Parents Be Concerned?

In many cases, there is no need to panic. The permanent tooth may naturally move into the correct position once the baby tooth falls out. Children’s mouths continue to grow and change, allowing teeth to shift over time.

However, it is important to monitor the situation closely. If the baby tooth remains firmly in place or the permanent tooth continues to erupt in an unusual position, professional evaluation is recommended.

What Can Parents Do at Home?

If the baby tooth is already loose, encourage your child to gently wiggle it with clean fingers. Natural movement can help the tooth come out sooner and create space for the permanent tooth.

Avoid trying to force the tooth out. Pulling a tooth before it is ready can cause discomfort and may damage surrounding tissues.

Continue regular brushing and flossing, especially around the crowded area where food and plaque can collect more easily.

When Is It Time to See a Dentist?

A dental visit is a good idea if:

  • The baby tooth is not becoming loose.
  • The permanent tooth continues to grow behind it.
  • Your child experiences pain, swelling, or difficulty cleaning the area.
  • Several weeks have passed with no sign of the baby tooth falling out.

A qualified pediatric dentist can examine the teeth and determine whether intervention is necessary.

What Treatment Might Be Needed?

Every child is different. In some situations, the dentist may simply recommend monitoring the tooth for a short period. Many baby teeth loosen and fall out naturally without treatment.

If the baby tooth remains stubbornly in place, removing it may be the best option. Once the baby tooth is gone, the permanent tooth often moves forward into a more natural position as the jaw continues to develop.

Early evaluation helps ensure that any developing alignment concerns are identified before they become more complicated.

Helping Your Child Feel Comfortable

Children can become worried when they notice an extra row of teeth in the mirror. Reassure them that this happens to many kids and that a dentist can check whether everything is progressing normally.

Keeping dental appointments and addressing concerns early can help support healthy tooth development and provide peace of mind for both parents and children.

Give Your Child’s Smile the Attention It Deserves

If you’ve noticed a permanent tooth coming in behind a baby tooth, don’t spend weeks wondering what it means. The team at Pittsford Orthodontics & Pediatric Dentistry can evaluate your child’s smile, explain what’s happening, and recommend the most appropriate next steps. Visit our dental clinic in Pittsford for expert guidance and compassionate care designed specifically for growing smiles. Schedule an appointment today and help your child stay on track for a healthy future.

Frequently Asked Questions :

Is it normal for a permanent tooth to grow behind a baby tooth?
Yes. This is a common occurrence in children, especially with the lower front teeth during the early mixed dentition stage.

Will the permanent tooth move into place on its own?
Often, yes. Once the baby tooth falls out, the permanent tooth may gradually shift into a better position naturally.

Does my child always need a tooth extraction?
No. Many cases can be monitored. Extraction is only considered when the baby tooth does not loosen or blocks proper eruption.

How long should I wait before scheduling a dental visit?
If the baby tooth remains firm after a few weeks or the permanent tooth continues erupting behind it, it is wise to have it evaluated.

Can this affect future tooth alignment?
It can in some cases. Early assessment helps identify whether additional monitoring or treatment may be needed.

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