INBDE (Integrated National Board Dental Examination) Practice Exam

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When do mandibular central incisors begin to calcify?

8-10 months after birth
3-4 months after birth
At birth
6 months after birth

The correct answer is: 3-4 months after birth

Mandibular central incisors are the first teeth to erupt in infants, typically around 6-10 months after birth. However, calcification, or the hardening of the tooth structure, begins earlier than the eruption. Mandibular central incisors begin to calcify around 3-4 months after birth. This makes option B the correct answer as it is the earliest time frame mentioned out of the given options. Options A, C, and D are incorrect because they either mention a later or earlier time frame for calcification to begin.