Teeth are important for biting, chewing, and speaking. Humans have two sets of teeth - 20 deciduous or "baby" teeth that are replaced, and 32 permanent adult teeth. Teeth have two parts - the visible crown for chewing and the root that anchors into the gums for stability while chewing. In total, humans are expected to have 52 teeth over their lifetime.

1. The teeth

2. Why teeth are important?
Teeth bite and chew food so that it is
small enough to be swallowed.
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• Teeth help you to form words so that
you can speak properly

3. How many teeth do we have?
Your first teeth are called deciduous teeth
(They can also be called milk teeth or primary teeth.)
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They are called deciduous because like the leaves
of a deciduous tree you lose them after a while.
You have 20 deciduous teeth and they start
growing into your mouth from about 6 months of
age.
All 20 teeth have grown into your mouth by about
two and a half years of age.

4. Your second teeth are called permanent teeth
(They are also called adult teeth).
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You will have 32 permanent teeth.
They are called permanent teeth because have
them for all of your life.
The permanent teeth push out your deciduous
teeth as they grow into your mouth.
They begin growing through your gums from
about 6 years and all 32 have finished growing
into your mouth by about 18 – 25 years.

5. PARTS OF A TEETH
The teeth have got two parts:
The crown is the part of The root of the tooth is
the tooth we can see in 'planted' into the gum to
our mouths.
keep the tooth steady while
it is doing its job.

6. PARTS OF A TEETH
The teeth have got two parts:
The crown is the part of The root of the tooth is
the tooth we can see in 'planted' into the gum to
our mouths.
keep the tooth steady while
it is doing its job.