• Dentition in humans includes a temporary dentition and a permanent dentition;
  • There are 20 temporary or deciduous teeth and they erupt between ± 6 – 10 months of age for the lower jaw (7-12 months of age for the upper jaw) and ± 30 months;
  • There are 28 permanent teeth (32 with wisdom teeth) and they appear between ± 6 and 13 years of age;
  • Girls often have a faster dental development than boys;
  • The eruption of the same tooth on both sides of the dental arch can be delayed. If this delay goes beyond 6 months, talk to your dentist;
  • Primary dentition will be completed between the second and third years of age, and some primary teeth will remain in the mouth until about 12 years of age;
  • The video on the opposite side shows in fast-forward a normal eruption sequence of 32 teeth in humans. The numbers at the bottom represent the eruption age in years.

There are 4 categories of teeth and they all have different roles:

  • 8 incisors (temporary and permanent)
  • 4 canines (temporary and permanent)
  • 8 premolars (permanent only)
  • Molars (8 temporary and 12 permanent including the wisdom teeth)

The incisors are the first teeth to come out in children. The ones in the lower jaw appear between 6 to 10 months of age, and those in the upper jaw, between 7 and 12 months of age.

The following tables represent the average age of tooth eruption.

Dental eruption diagram and chart for the eruption of deciduous (primary) teeth and permanent (definitive) dentition in humans. ODQ 2014


To learn more on normal dental eruption and anomalies that can be associated with it.

To learn more on tooth anatomy and types and functions of teeth.