Baby Teeth: A Guide to When They Fall Out & Come In

February 2, 2026

Filed under: Uncategorized — kidsdentistry @ 3:49 pm
Baby with two bottom teeth.

Your child’s smile goes through many exciting changes in the early years. From the first tiny tooth to the arrival of permanent teeth, each stage plays an important role in development. Understanding when baby teeth come in — and when they fall out — can help you know what to expect and when to call the dentist.

Here’s a simple guide to the timeline of baby teeth.

When Baby Teeth Come In

Baby teeth, also called primary teeth, usually begin to appear around 6 months of age. However, every child is different. Some babies may get their first tooth as early as 4 months, while others may not see one until closer to their first birthday.

The first teeth to erupt are typically the lower central incisors (the bottom front teeth), followed by the upper central incisors. From there, teeth usually come in pairs over the next two to three years.

By age 3, most children have a full set of 20 primary teeth:

  • 4 central incisors.
  • 4 lateral incisors.
  • 4 canines.
  • 8 molars.

Teething can cause mild discomfort, drooling, and irritability, but symptoms are usually manageable. If your child develops a high fever or severe symptoms, consult your pediatrician.

When Baby Teeth Fall Out

Baby teeth typically begin falling out around age 6. Just like when they came in, the teeth usually fall out in the same order.

The lower central incisors are often the first to go, followed by the upper front teeth. As permanent teeth push up from below, they gradually loosen the baby teeth until they fall out naturally.

Most children lose all of their baby teeth by age 12 or 13. Permanent molars — sometimes called “six-year molars” — often come in behind the baby teeth without replacing any. Because they don’t push out a baby tooth, parents sometimes don’t realize they’ve erupted.

Why Baby Teeth Matter

Even though baby teeth are temporary, they serve important functions. They help children chew properly, speak clearly, and hold space for permanent teeth. Early loss due to decay or injury can lead to crowding or alignment problems later.

That’s why regular dental visits are essential. Dentists recommend scheduling your child’s first dental appointment by their first birthday or within six months of the first tooth appearing.

Every child’s dental timeline is unique, but understanding the general pattern helps you feel confident during each stage of your child’s growing smile.

About the Practice

Looking for a trusted dental practice for your child? At Homer Sedighi, D.M.D., we can handle all your child’s dental needs under one convenient roof. No matter the age of your child, from infanthood to teenagers, we provide individualized dental care for growing smiles. We’re also equipped to provide special needs children great dental care, too. Book online with us or call (636) 777-7777.

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