Deciduous Teeth and the Chronology of the Dentitions
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How many deciduous teeth are there? Name those in each quadrant.
There are 20 deciduous teeth altogether, 5 in each quadrant. They are; the central incisor, lateral incisor, canine, first molar, second molar. Note - there are no premolars present
At what age does the first eruption of the deciduous dentition occur?
6-10 months
What is usually the first tooth to erupt in the deciduous dentition?
The mandibular central incisor.
In what order does the deciduous dentition erupt?
They erupt in pairs, with the mandibular pairs preceding the maxillary pairs. The order is; central incisors, lateral incisors, first molar, canine, second molar.
What is the 6/4 rule for the deciduous dentition eruption?
Every 6 months, 4 teeth erupt. I.e., at 6mths the four central incisors, at 12mths all 8 incisors, at 18mths incisors plus four canines…
What is the order of eruption for the permanent dentition?
First molar, central incisor, lateral incisor, canine, first premolar, second premolar, second molar, third molar.
What is the age span for the eruption of the deciduous dentition?
From 6-10mths to 2-3yrs
What is the age span for the eruption of the permanent dentition?
From 6-7yrs to 12yrs (except third molars/wisdom teeth which erupt from 17-21yrs)