Parents often notice it during a bath time smile check or while helping with brushing: a small second row of teeth peeking out just behind the front baby teeth. It can look startling at first, especially when the baby tooth in front is not loose at all. In most cases, though, this is a normal part of growing up, and there is a clear reason it happens.
This double row is sometimes called shark teeth, and it shows up when a permanent tooth starts coming in before the baby tooth in front of it has fallen out. At SmileWorks, we see this often in Manhattan families with young kids working through the early stages of losing baby teeth, and we can help you figure out whether your child’s baby tooth needs a little help or just some time.
Why Permanent Teeth Sometimes Erupt Behind Baby Teeth
Under normal conditions, a permanent tooth grows in directly beneath its matching baby tooth. As the permanent tooth pushes upward, it gradually dissolves the root of the baby tooth above it. This root slowly disappears until the baby tooth is loose enough to wiggle out on its own, clearing a path for the permanent tooth to settle into place.
Sometimes the permanent tooth takes a slightly different path and moves in behind the baby tooth instead of underneath it. Because the pressure is not pointed directly at the root, the baby tooth may stay firmly in place even as the new tooth becomes visible. This is why children can end up with what looks like two rows of teeth for a period of weeks or months.
Where It Shows Up Most Often
This pattern tends to appear most in the lower front teeth, usually between ages five and seven, right around the time kids start losing their first baby teeth. Some children go through it with one tooth, while others notice it happening with several at once as different teeth move through their own eruption timelines.
What You Can Do While You Wait
For most kids, the stubborn baby tooth loosens up and falls out within a few weeks without any help at all. There are a few gentle steps you can encourage at home during this waiting period, and a short conversation about care makes the process feel less unusual for your child.
Here is what tends to help while the permanent tooth finishes settling into its spot.
- Encourage your child to gently wiggle the loose baby tooth with clean fingers or their tongue a few times a day.
- Keep up regular brushing and flossing around both rows, since food can get trapped more easily in that space.
- Offer some crunchy fruits or vegetables at meals, since natural chewing pressure can help loosen a stubborn tooth.
- Avoid pulling the tooth yourself, since removing it too early can disturb the root structure still in place.
If the baby tooth has not budged after a couple of months, or if the permanent tooth behind it is growing tall enough to reach the same height, it is a good time to have a dentist take a look rather than continuing to wait it out.
When a Dental Visit Makes Sense
A short visit can settle any uncertainty about whether a baby tooth needs extra help. According to the National Library of Medicine, local factors such as arch length and the retention of baby teeth are common contributors to a permanent tooth erupting along an unusual path, and a dentist can confirm whether that is what is happening with your child.
During a visit, our 3D imaging technology lets us see exactly how the permanent tooth is positioned under the gum line, which helps us decide quickly whether the baby tooth simply needs more time or whether a gentle extraction will clear the way. Most cases resolve with nothing more than patience and a little extra brushing attention, so a visit is often more reassuring than it is a big procedure.
If your child is also due for their first visit or a routine cleaning, this is an easy thing to bring up while you are already in the chair. Catching it early keeps the rest of your child’s smile developing the way it should as more permanent teeth come in over the next few years, including the ones covered in our guide to pediatric dentistry in Manhattan.
Why Families Trust SmileWorks With Growing Smiles
SmileWorks brings together pediatric dentistry, orthodontic treatments, and general dentistry under one roof in Midtown East, which means your child’s shark teeth question and their next orthodontic checkup can often be handled during the same visit. Our office uses 3D X-ray, 3D scanner, and 3D printer technology so we can watch how your child’s teeth are developing without guesswork, and every recommendation we make is based on what we can actually see happening beneath the gum line.
If you have noticed a second row of teeth in your child’s smile and want a second opinion, reach out to SmileWorks NYC today. Our team is happy to take a look, put your mind at ease, and answer any questions you have through our contact form.