Why Are My Child’s Adult Teeth Coming in Behind Baby Teeth?

Opening your child’s mouth and spotting a second row of teeth can be alarming the first time you see it. What’s often nicknamed shark teeth in child dental development happens when a permanent tooth starts coming in behind a baby tooth that hasn’t fallen out yet, creating a temporary double row. While it can look unusual, it’s actually a fairly common part of childhood dental development.

At Cottonwood Dental, this is one of those situations parents bring their kids in for fairly often, usually a little worried. In many cases, these changes are simply part of normal development, but it’s still important to have your child’s teeth evaluated. Monitoring developing teeth allows us to identify whether everything is progressing as expected. 

Why This Happens in the First Place

Normally, as a permanent tooth develops underneath a baby tooth, it gradually dissolves the roots of the baby tooth above it, which is what eventually causes that baby tooth to become loose and fall out on its own. Sometimes, though, the permanent tooth erupts in a slightly different position, often more toward the tongue side, before the baby tooth’s root has fully dissolved. When that happens, you end up with an adult tooth behind baby tooth situation, sometimes called double row teeth, most commonly seen with the lower front teeth around ages 6 to 8.

Why It’s More Common Than You’d Expect

This pattern shows up frequently enough that pediatric dentists consider it a normal, if slightly unusual-looking, variation of tooth development rather than a serious problem. It tends to happen most often in the lower jaw, though it can occur elsewhere too. Genetics can play a role, and it’s not uncommon for it to run in families.

Does It Resolve on Its Own?

In many cases, yes. Once the permanent tooth begins pushing against the baby tooth from behind, and as the child’s tongue naturally applies pressure while talking, chewing, and swallowing, the baby tooth often loosens and falls out within a matter of weeks on its own, allowing the permanent tooth to gradually shift into its proper position.

If you’ve noticed a permanent tooth coming in behind a baby tooth and you’re unsure whether it’s progressing normally, schedule an appointment so our team can examine your child’s smile and recommend the right next steps.

When a Baby Tooth Needs a Little Help

If the baby tooth doesn’t loosen and fall out naturally within a reasonable amount of time, usually somewhere around a few weeks to a couple of months, a dentist may recommend removing it. This is a quick, straightforward procedure that gives the permanent tooth room to move into a better position with less risk of long-term crowding or alignment issues.

Should You Try to Pull the Baby Tooth Yourself?

It’s understandable to want to speed things along at home, but pulling a tooth before it’s truly ready can be uncomfortable for your child and isn’t usually necessary. Encouraging your child to gently wiggle the tooth with clean hands, or offering slightly firmer foods like apples or carrots, can sometimes help move things along naturally without any at-home intervention.

Will This Affect Their Permanent Smile?

In the vast majority of cases, once the baby tooth is out of the way, permanent teeth settle into a normal position over time, especially with the natural pressure from the tongue, cheeks, and lips guiding them. Keeping an eye on it with regular dental checkups helps make sure everything is tracking the way it should, and catches anything that might need a small nudge in the right direction.

When to Have It Checked Sooner

If the baby tooth seems firmly in place with no signs of loosening after a couple of months, or if your child is experiencing noticeable discomfort, it’s a good idea to schedule a visit rather than waiting it out longer. Catching it early generally means an easier, faster resolution.

Helping Your Child’s Smile Stay on Track 

A double row of teeth looks more concerning than it usually is, and in most cases, it resolves naturally as part of your child’s normal dental development. Still, keeping an eye on it and getting a professional opinion offers real peace of mind. If you’re in the Salt Lake City area and have noticed a second row of teeth developing, we’d be happy to help. Find our Salt Lake City dental office and let our team make sure your child’s smile is developing as expected. 

FAQs

1. At what age do shark teeth usually appear?

Shark teeth most commonly appear between the ages of 6 and 8, when the lower front permanent teeth begin replacing baby teeth. However, they can also occur in other areas of the mouth as additional permanent teeth erupt.

2. Should I pull out my child’s loose baby tooth if an adult tooth is coming in behind it?

It’s best not to force a baby tooth out before it’s ready. Encourage your child to gently wiggle the tooth with clean hands. If it doesn’t loosen over time or causes discomfort, your dentist can determine whether it should be removed.

3. Will permanent teeth move into the correct position on their own?

In many cases, yes. Once the baby tooth falls out or is removed, the permanent tooth often shifts into a more natural position as your child continues to grow. Regular monitoring helps ensure everything is progressing as expected.

4. When should I take my child to the dentist for shark teeth?

You should schedule an evaluation if the baby tooth remains firmly in place for several weeks after the permanent tooth has erupted, if your child experiences pain or swelling, or if you’re concerned about how their teeth are developing. Early assessment can help prevent future alignment issues.