Teeth

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Teeth

  1. 1. The Teeth © PDST Home Economics
  2. 2. Healthy Teeth & Gums  Help us to digest food  Make us look better  Good health – bad teeth cause bad breath, abscesses, stomach upset  Help us speak clearly
  3. 3. Sets of Teeth  Primary Teeth aka milk, temporary.  20 teeth  0 to 7 yrs  Permanent Teeth  32 teeth  8yrs to death
  4. 4. Types and functions of teeth Types Number Function Incisor 8 Cut & bite Canine 4 Tear Premolar 8 Chew & grind Molar 12 Chew & grind
  5. 5. Structure of the Tooth
  6. 6. Structure  2 main part (a) crown, (b) root  Mostly made of dentine which is like bone  The crown is covered in enamel, the hardest substance in the body.  The root is covered in cement which sticks the tooth in the gum and bone  In the centre of the dentine is a space called the pulp cavity, blood vessels and nerves are found here
  7. 7. Dental Health  2 main dental health problems are (a) tooth decay and (b) gum disease.  Both are caused by plaque, a mixture of food saliva and bacteria that build up on the teeth.  Tooth decay: Bacteria react with food forming acid which burns into the tooth causing a cavity, when the decay reaches the nerve pain is felt.
  8. 8. Gum disease
  9. 9. Dental decay
  10. 10. Care of teeth  Brush twice a day at least using fluoride toothpaste  Floss at night to avoid gum disease  Replace toothbrush regularly  Visit dentist every 6 months  Avoid sugary foods  Eat calcium and Vit D rich foods
  11. 11. Fluoride  Mineral element that makes tooth enamel stronger and prevents decay.  Added to our water supply, toothpaste and mouth wash

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