Tooth Development Stages

Tooth Development Stages

Today you will learn about the teeth growing period or stages of tooth development.

The age that babies start growing teeth and the rate at which they grow differs from person to person.

There is no definite age a child should get his or her first tooth. Some babies get there first tooth at the early as age of three months, while others’ only appear as late as their first birthday. Some babies are born with their first tooth.

The general rule is that for every six months of age, four primary teeth will have grown out. Teeth generally grow out in pairs, one on the left and one on the right.

Initiation stage of tooth development


What follows here is an estimated guideline of when the average child grows his teeth.

The teething process typically begins at the age of 4 to 10 months. The baby’s gums may be red and swollen where the teeth are coming through.

Between 5 and 10 months of age the first teeth will appear. The first teeth to appear are usually the bottom middle two – the lower middle incisors. They usually appear soon after each other.

The upper middle teeth (central incisors) appear between 6 months and 12 months of age.

Between the ages of 10 and 16 months the lower lateral incisors – bottom adjacent to the middle teeth – appear and the top lateral incisors grow out next at between 9 and 13 months of age.

The first molars grow out between one and one and a half years old. Top and bottom come in at approximately the same time. And between 16 and 22 months the canines appear at the top and at the bottom.

The bottom molars will grow through the gum between the age of 20 and 31 months and the top molars soon after (25 to 33 months).

Between two and three years old, the child will have twenty baby teeth, also called primary teeth.

The child’s primary teeth will start to loosen and fall out from the age of 6 to make room for permanent teeth. With this too the age varies from child to child, though generally girls lose their baby teeth earlier than boys do. Permanent teeth tend to grow in the same order that the primary teeth did.

It may happen that a child will lose a primary tooth early due to an accident or tooth decay. In this case the permanent tooth may grow out early and come out crooked due to the limited space available.

Tooth Development 

The permanent teeth grow in at approximately the following ages. First the lower central incisors and the first molars, top and bottom. This happens between the ages of 6 and 7 years. The top central incisors and the bottom lateral incisors grow out next between 7 and 8 years. The upper lateral incisors grow out between 8 and 9 years old.

The lower canines will grow in between 9 and 10 years old. These are followed by the first and second premolars (top and bottom) between the ages 10 to 12 years.

The upper canines grow out between the ages of 11 and 12. The second molars(1) come in first at the bottom between the ages 11 and 13 years and then at the top between 12 and 13 years old.

After that the growing of teeth stop for a couple of years until your top and bottom wisdom teeth come in at any age between 17 years old and 21 years old.

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