Normal eruption of teeth

• 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.

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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.