Download The Teeth - Year7MyBody

The Teeth
Contents
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Baby teeth
Parts of a tooth
Types of teeth
What causes cavities?
How does decay happen?
5 Steps to a Healthy Smile.
Experiments
Quiz
BABY TEETH
Parts of the tooth
• Crown
• Root
Dental Fact: did you know that
the enamel on your teeth is
the hardest substance in
your body?
• Enamel
• Dentin
• Pulp
• Cementum
Types of teeth
• Incisors = the sharpest
teeth.
• Canine teeth = meant
for grasping and tearing
food.
• Premolars = meant for
crushing food.
• Molars = their job is to
chew and grind the
food into smaller
pieces.
What causes cavities?
• Bacteria living organisms
are on your teeth, gums,
lips and tongue.
• some bacteria can be
harmful, most are not and
some are even helpful.
• attach to the enamel. If
they're not removed, they
multiply and grow.
• Proteins that are present in
your saliva (spit) also mix in
and the bacteria colony.
• plaque is what causes
cavities.
How does decay happen?
• Enamel contains durable
mineral salts, like calcium.
• Acid causes them to break
down.
• plaque produces acid as it eats
up sugar.
• The acid dissolves the enamel
and holes appear. This is a
cavity.
• It's important to see your
dentist before a cavity forms
so that the plaque you can't
reach with your toothbrush or
floss can be removed.
5 steps to a healthy smile
• DON’T WAIT UNTIL IT IS
TOO LATE
• FLOSS IS THE BOSS
• EAT AND DRINK BUT BE
SURE TO THINK.
• BE GOOD TO THOSE GUMS.
• IT TAKES A WHILE TO BRUSH
THAT SMILE!
Experiments
ACID ATTACKS
This experiment
simulates an acid
attack on
bones(bones are
rich with calcium,
just like your
teeth).
FLOSS IS THE BOSS
• What you'll need:
a rubber glove, a jar of
peanut butter and
something to spread it with,
a container of dental floss, a
toothbrush and some
toothpaste.
• What will happen:
a toothbrush simply can't
reach all the places
between your teeth. Dental
floss can do a much better
job of removing food
between your teeth.
Bibliography
• http://www.healthyteeth.org/quiz/index.html
• http://en.wikipedia.org/wiki/Teeth
• http://www.kidshealth.org/kid/htbw/teeth.ht
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