Question

The erupted dentition of a normally developed 7-year-old child usually consists of?

A. 8 primary and 8 permanent teeth.
B. 10 primary and 10 permanent teeth.
C. 18 primary and 6 permanent teeth.
D. 20 primary teeth.
E. permanent teeth only.

Answer 1

Answer:C

Explanation:Tooth eruption is a process in tooth development in which the teeth enter the mouth and become visible. It is currently believed that the periodontal ligament plays an important role in tooth eruption. the remaining permanent teeth erupt into the mouth during the permanent dentition stage.

The primary teeth typically erupt in the following order: (1) central incisor, (2) lateral incisor, (3) first molar, (4) canine, and (5) second molar. As a general rule, four teeth erupt for every six months of life, mandibular teeth erupt before maxillary teeth, and teeth erupt sooner in females than males.