1. DIFFERENTIATION IN ACTION:
SAMPLES FOR HOME ECONOMICS
‘THE TEETH’
POWERPOINT

2. Prevent toothache, bad breath and stomach upset
Healthy teeth
Help to digest food
Look attractive
Prevent toothache, bad breath and stomach upset
Enable you to speak clearly

3. Good and bad teeth

4. Sets of teeth Primary teeth: Also known as milk teeth 20 in number
Grow during first or second year
Fall out around age 7
Permanent teeth:
32 in number
Begin to grow around years of age

5. The teeth

6. Teeth Number Functions
Types of teeth
Teeth
Number
Functions
Incisors 8
Cut and bite food
Canines 4
Tear food
Premolars 8
Chew and grind food
Molars 12
Chew and grind food

7. Structure of the tooth

8. Dental health problems
Tooth decay
Gum disease
Mainly caused by plaque

9. Plaque
Saliva, food particles and bacteria.
Forms a sticky coating on the teeth.

10. Bacteria and food particles in plaque form acid.
Tooth decay
Bacteria and food particles in plaque form acid.
Acid attacks the enamel.
Cavities form.
The tooth decays.

11. Use a good-quality toothbrush. Use fluoride toothpaste.
Caring for your teeth
Use a good-quality toothbrush.
Use fluoride toothpaste.
Clean your teeth well every day.
Cut down on sugary foods.
Include calcium foods in your diet.
Visit the dentist regularly.

12. It strengthens tooth enamel. It is found in toothpaste and mouthwash.
Fluoride
Fluoride is a mineral.
It strengthens tooth enamel.
It is found in toothpaste and mouthwash.
It is added to the water supply.

13. Tooth care and oral hygiene
Toothbrush
Toothpaste
Disclosing tablets
Dental floss
Mouthwash
Fissure seals

14. Flossing

15. Correct brushing

16. Learning check
1. List three reasons why it is important to have healthy teeth. 2. Name the four types of teeth. 3. Which teeth cut and bite food? 4. What is the outer protective coating on the tooth called? 5. What is plaque? 6. List three oral hygiene products.