National Dental Examining Board of Canada (NDEB) Practice Exam

Question: 1 / 400

At what age can a congenitally missing mandibular P2 first be diagnosed?

6 years old

A congenitally missing mandibular P2, which is a missing tooth in the lower jaw, can be first diagnosed at the age of 6 years old. By this age, the permanent teeth have usually erupted and it becomes noticeable if a tooth is missing. Options B, C, and D are incorrect because by 4, 8, and 10 years old respectively, most children would have already developed their permanent teeth and a missing tooth would have likely been noticed earlier. Additionally, if the condition is congenital, it means it was present at birth or developed during fetal development, so it could potentially be diagnosed even earlier than 6 years old. Therefore, the best option is A.

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4 years old

8 years old

10 years old

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