A mother is concerned because her 18-month-old toddler has 12 teeth. She is wondering if this is normal for a child of this age. The nurse's best response would be:
a. "How many teeth did you have at this age?"
b. "All 20 deciduous teeth are expected to erupt by age 4 years."
c. "This is a normal number of teeth for an 18 month old."
d. "Normally, by age 2 years, 16 deciduous teeth are expected."
ANS: C
The guidelines for the number of teeth for children younger than 2 years old are as follows: the child's age in months minus the number 6 should be equal to the expected number of deciduous teeth. Normally, all 20 teeth are in by 2 years old. In this instance, the child is 18 months old, minus 6, equals 12 deciduous teeth expected.
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