COA Dental Anatomy & Oral Development 2

Question 1

At approximately what age do primary (deciduous) teeth typically begin to erupt in infants?

Accepted Answer

6–10 months

Answer

2–3 months

Answer

12–18 months

Answer

18–24 months

Question 2

How many teeth are present in a complete primary (deciduous) dentition?

Accepted Answer

20

Answer

16

Answer

24

Answer

28

Question 3

Which permanent teeth typically erupt FIRST into the oral cavity around age 6?

Accepted Answer

Mandibular central incisors and first permanent molars

Answer

Maxillary central incisors

Answer

Mandibular central incisors only

Answer

First permanent molars only

Question 4

What is the clinical term for the natural shedding of primary teeth as their roots are resorbed to allow permanent tooth eruption?

Accepted Answer

Exfoliation

Answer

Resorption

Answer

Eruption

Answer

Avulsion

Question 5

The mandibular central incisors typically erupt at approximately what age?

Accepted Answer

6–7 years

Answer

4–5 years

Answer

8–9 years

Answer

10–11 years

Question 6

Which term describes a permanent tooth that fails to erupt into the oral cavity and remains embedded within the bone?

Accepted Answer

Impacted tooth

Answer

Ectopic tooth

Answer

Ankylosed tooth

Answer

Transposed tooth

Question 7

During tooth development, which stage involves the deposition of enamel, dentin, and cementum to form the hard tooth structures?

Accepted Answer

Apposition stage

Answer

Initiation stage

Answer

Bud stage

Answer

Bell stage