08/09/2026
Have you noticed a new tooth growing behind your child's baby tooth?
It can look a little strange, but it's actually a common stage of dental development known as "shark teeth".
This happens when a permanent tooth starts to come through before the baby tooth has fallen out. It's most common with the lower front teeth, usually between the ages of 5 and 7.
In many cases, there's no need to worry. As the permanent tooth continues to grow, it often helps loosen the baby tooth, which will then fall out naturally over the following weeks or months.
You can help by encouraging your child to:
• Wiggle the baby tooth gently with clean fingers or their tongue if it's already loose.
• Keep brushing twice a day with fluoride toothpaste, paying extra attention around the new tooth.
When should you see a dentist?
• The baby tooth isn't becoming loose after several weeks.
• The permanent tooth has come through a long way and the baby tooth is still firmly in place.
• Your child has pain, has swelling or signs of infection.
• You're worried about how the teeth are developing.
Regular dental check-ups are the best way to keep an eye on your child's developing smile. If a baby tooth needs a little extra help coming out, your dentist can advise on the best next steps.
Most cases of "shark teeth" are simply a normal part of growing up, and with a little time, everything usually moves into place.
[Image description: Close-up of a child’s mouth displaying two rows of lower front teeth, commonly referred to as “shark teeth,” with the tongue visible and the Derbyshire Family Health Service logo in the corner.]