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

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

Good and bad teeth

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 7 years of age

The teeth

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

Structure of the tooth

Dental health problems Tooth decay Gum disease Mainly caused by plaque

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

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.

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.

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.

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

Flossing

Correct brushing

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.