Temporary dentition eruption occurs around which age?

Temporary dentition eruption occurs around which age?

• A. 12 months
• B. 18 months
• C. 24 months
• D. 30 months

Answer: (B)

Eruption of the temporary (deciduous) teeth begins after birth and progresses in a defined sequence. The first primary tooth typically comes in around 6–8 months, and the full set of 20 deciduous teeth is usually present by about 30 months, though there is natural variation. By around 18 months, a large majority of the deciduous teeth have erupted, making it a common general estimate for when the temporary dentition is well under way. That’s why 18 months is chosen as the typical time point. If we look at the other ages: at 12 months only a few teeth have erupted, so it’s too early for the majority of the temporary dentition; at 24 months you’d expect most but not necessarily all deciduous teeth to be present; at 30 months you’re close to the completion of eruption. The 18-month mark best captures the period when eruption is already established for most children.

Eruption of the temporary (deciduous) teeth begins after birth and progresses in a defined sequence. The first primary tooth typically comes in around 6–8 months, and the full set of 20 deciduous teeth is usually present by about 30 months, though there is natural variation.

By around 18 months, a large majority of the deciduous teeth have erupted, making it a common general estimate for when the temporary dentition is well under way. That’s why 18 months is chosen as the typical time point.

If we look at the other ages: at 12 months only a few teeth have erupted, so it’s too early for the majority of the temporary dentition; at 24 months you’d expect most but not necessarily all deciduous teeth to be present; at 30 months you’re close to the completion of eruption. The 18-month mark best captures the period when eruption is already established for most children.