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The Impact of Thumb Sucking on Dental Health

Why Thumb Sucking Isn’t Just a Phase

baby sucking their thumbMost little ones suck their thumbs- it’s soothing, familiar, and helps them feel secure. But if the habit lingers beyond the toddler years, it can begin to shape more than just comfort. Long-term thumb sucking, especially after age four or five, can start affecting how the teeth and jaws grow. The result? Changes in bite alignment, speech development, and even facial structure.

How It Affects Growing Smiles

When a child continues thumb sucking past early childhood, it can lead to a condition called an open bite, where the top and bottom front teeth don’t meet properly. It can also cause the upper jaw to narrow, pushing the teeth out of line. Over time, this may create difficulties with chewing, speaking clearly, or breathing through the nose. And because young jaws are still developing, even gentle, repetitive pressure from a thumb can make a big difference.

Helping Your Child Break the Habit

The good news? There are gentle, positive ways to support your child through this phase. Try these ideas:

  • Offer a substitute: a cuddly toy or blanket for comfort might work
  • Reward progress: even if it’s small steps
  • Use stories or books: show them other kids who stopped sucking their thumb
  • Try the dummy fairy: many parents have success with this imaginative approach when it’s time to say goodbye to a dummy or a thumb
  • Keep it light: avoid shaming or pressure, which can backfire

If you’re not sure what to expect or need help figuring out the next steps, we’re here to help. Bring your child in for a quick hello- we’re happy to have a look and ease into things with no pressure. We also bulk-bill eligible kids through the Child Dental Benefits Schedule (CDBS), so ask us if your family qualifies.

Let’s Support Your Child’s Smile From the Start

Book a visit at Morton Dental, and let us help keep those growing teeth on track—one gentle step at a time.

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* Any surgical or invasive procedure carries risks. Before proceeding, you should seek a second opinion from an appropriately qualified health practitioner.

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