Figure 4-2.Average periods for emergence and exfoliation of primary teeth.
Figure 4-3.Average periods of emergence of permanent teeth.
STRUCTURE OF TEETH
A tooth is divided into two parts: the crown and
one or more roots.
Figure 4-4 illustrates the tooth
crown and root.
The crown is divided into the anatomic and clinical
crown. The anatomical crown is that portion of the
tooth encased in enamel. In young people, areas of the
Figure 4-4.Tooth crown and root.