Question

You are six years old and have lost two primary incisors which have been replaced by their permanent successors. Unfortunately, you have also had an accident and lost two other primary incisors which have not been replaced. All your six year molars have erupted. How many teeth do you have?

a. 20
b. 18
c. 22
d. 24

Answer 1

At six years old, you would have a total of 20 teeth, including the permanent successors of the lost primary incisors and the erupted six-year molars.

Step-by-step explanation:

To determine the number of teeth you have at six years old, we need to consider the dental development. At this age, children have 20 deciduous teeth (baby teeth) which are gradually replaced by 32 permanent teeth. The process starts around 6 years old and continues until around 12 years old.

In the given scenario, you have lost two primary incisors which have been replaced by their permanent successors. Additionally, you have lost two other primary incisors which have not been replaced. All six-year molars have erupted, so they are already part of your permanent set of teeth.

Therefore, you would have 16 permanent teeth (8 incisors, 4 cuspids/canines, and 4 first molars) plus your 6-year molars, totaling 20 teeth. So the

correct answer is a. 20.