Teeth eruption timetable

When do primary teeth erupt (come in) and fall out?

This chart shows when primary teeth (also called baby teeth or deciduous teeth) erupt (come in) and fall out. Remember that eruption times can vary from child to child, and this is a general guide.

Upper TeethWhen tooth emergesWhen tooth falls out
Central incisor8 to 12 months6 to 7 years
Lateral incisor9 to 13 months7 to 8 years
Canine (cuspid)16 to 22 months10 to 12 years
First molar13 to 19 months9 to 11 years
Second molar25 to 33 months10 to 12 years
Lower TeethWhen tooth emergesWhen tooth falls out
Second molar23 to 31 months10 to 12 years
First molar14 to 18 months9 to 11 years
Canine (cuspid)17 to 23 months9 to 12 years
Lateral incisor10 to 16 months7 to 8 years
Central incisor6 to 10 months6 to 7 years

You can see from the chart, the first teeth begin to break through the gums at about 6 months of age. Usually, the first two teeth to erupt are the two bottom central incisors (the two bottom front teeth).

Next, the top four front teeth emerge.

After that, other teeth slowly begin to fill in, usually in pairs -- one each side of the upper or lower jaw -- until all 20 teeth (10 in the upper jaw and 10 in the lower jaw) have come in by the time the child is 2 ½ to 3 years old.

The complete set of primary teeth is in the mouth from the age of 2 ½ to 3 years of age to 6 to 7 years of age.

Other primary tooth eruption facts:

  • A general rule of thumb is that for every 6 months of life, approximately 4 teeth will erupt.
  • Girls generally precede boys in tooth eruption.
  • Lower teeth usually erupt before upper teeth.
  • Teeth in both jaws usually erupt in pairs -- one on the right and one on the left.
  • Primary teeth are smaller in size and whiter in color than the permanent teeth that will follow.
  • By the time a child is 2 to 3 years of age, all primary teeth should have erupted.

Shortly after age 4, the jaw and facial bones of the child begin to grow, creating spaces between the primary teeth. This is a perfectly natural growth process that provides the necessary space for the larger permanent teeth to emerge. Between the ages of 6 and 12, a mixture of both primary teeth and permanent teeth reside in the mouth.

If baby teeth fall out after a couple of years, why is caring for them important?

While it’s true that primary teeth are only in the mouth a short period of time, they play a vital role in the following ways:

  • They reserve space for their permanent counterparts.
  • They give the face its normal appearance.
  • They aid in the development of clear speech.
  • They help attain good nutrition (missing or decayed teeth make it difficult to chew causing children to reject foods).
  • They help give a healthy start to the permanent teeth (decay and infection in baby teeth can cause dark spots on the permanent teeth developing beneath it).

Permanent teeth eruption chart

The following chart shows when permanent teeth emerge.

Upper TeethWhen tooth emerges
Central incisor7 to 8 years
Lateral incisor8 to 9 years
Canine (cuspid)11 to 12 years
First premolar (first bicuspid)10 to 11 years
Second premolar (second bicuspid)10 to 12 years
First molar6 to 7 years
Second molar12 to 13 years
Third molar (wisdom teeth)17 to 21 years
Lower TeethWhen tooth emerges
Third molar (wisdom tooth)17 to 21 years
Second molar11 to 13 years
First molar6 to 7 years
Second premolar (second bicuspid)11 to 12 years
First premolar (first bicuspid)10 to 12 years
Canine (cuspid)9 to 10 years
Lateral incisor7 to 8 years
Central incisor6 to 7 years

In some children, the first permanent molars are the first to emerge; in others, the incisors are the first to emerge. By the age of 13, most of the 28 permanent teeth will be in place. One to four wisdom teeth, or third molars, emerge between the ages of 17 and 21, bringing the total number of permanent teeth up to 32.

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