Permanent Dentition

The permanent dentition is comprised of 32 teeth. There are 16 teeth in the maxilla and 16 in the mandible. In each arch there are two central incisors, two lateral incisors, two canines, four premolars, and six molars. The permanent central incisors, lateral incisors, first and second premolars replace the primary dentition. The primary molars are replaced with the permanent premolars, and the permanent molars erupt posterior to those. Table 2 indicates the approximate eruption dates for the permanent molars.

Table 2. Permanent Dentition.3
Tooth Eruption Date
(Avg.)
Maxillary
Central Incisor 7-8 Years
Lateral Incisor 8-9 Years
Canine 11-12 Years
1st Premolar 10-11 Years
2nd Premolar 10-12 Years
1st Molar 6-7 Years
2nd Molar 11-13 Years
3rd Molar 17-21 Years
Mandibular
Central Incisor 7-8 Years
Lateral Incisor 8-9 Years
Canine 9-10 Years
1st Premolar 10-12 Years
2nd Premolar 11-12 Years
1st Molar 6-7 Years
2nd Molar 11-13 Years
3rd Molar 17-21 Years
Figure 8. Permanent Dentition Teeth Named and Numbered.
permanent dentition