Understanding the Eruption Cycle of Teeth: When & What to Expect

The eruption cycle of teeth is a natural timeline that every child goes through as they grow — and understanding it helps parents track healthy dental development. From baby teeth to adult teeth, each stage plays a vital role in speech, nutrition, and jaw development.

• Baby Teeth (Primary Dentition)

Teeth usually begin to erupt around 6 months of age, starting with the lower central incisors. By age 3, most children will have a full set of 20 primary teeth. These teeth help in chewing and speech, and also act as placeholders for permanent teeth.

• Permanent Teeth (Secondary Dentition)

Around age 6, children start losing their baby teeth, making way for adult teeth. The first molars and lower central incisors are typically the first to appear. By age 13, most kids have 28 permanent teeth, and by 17–25 years, the wisdom teeth (third molars) may erupt.