Page 51 - Science class 4

6 Our Teeth

Inside l Set of teeth l Types of teeth
Inside
the l Incisors, Canines, Premolars, Molars.
the
Chapter
Chapter
l Parts of a tooth l Care of teeth
SET OF TEETH

We are all born without teeth. After six to

seven months, a baby cuts the first tooth. By
two-and-a-half years, about twenty teeth
come up.

This set of teeth in a child is called milk teeth .

Milk teeth are also called temporary teeth .

When a child is about six years old, milk teeth start falling one by one.
Slowly new ones, that are bigger in size, take their place. The second set of

teeth form the permanent teeth because they remain throughout life. There
are usually 32 teeth in a permanent set.

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The set of teeth that a Dentures are an artificial set of teeth.
child gets in the beginning
is called MILK TEETH TYPES OF TEETH
Teeth are mainly needed to bite and chew
our food. According to their functions, they
are divided into four types.
Incisors

There are eight incisors in all (four in the
upper jaw and four in the lower one).

These are shovel-shaped teeth at the front

of the mouth. These are used for cutting
and biting our food.

Incisor Canine