Question

Answer questions after reading the following paragraph:
Tooth decay starts when pH of the mouth is lower than 5.5. Tooth enamel is made up of
calcium hydroxyapatite (crystalline form of calcium phosphate) is hardest substance in the
body. It does not dissolve in water, but corrodes when pH of mouth falls below 5.5. Bacteria
present in mouth produces acid by degradation of sugar and food particles in mouth after
eating. The best way to prevent this is to dean mouth after eating. Using toothpaste which are
generally basic, for cleaning the teeth can neutralize the excess acid and prevent tooth decay.
b)
c)
What is the composition of material of teeth?
What should be the pH of mouth to prevent damage to teeth?
Which of the following should be avoided to prevent tooth decay?
[Bread, cucumber, cakes. sweets)
Write the best way to prevent damage to teeth
d)

answer fast pls

Answer 1

1. Tooth enamel is made up of calcium hydroxyapatite which is hardest substance in the body. Teeth also require a basic pH so that our enamel doesn't get dissolve
2. The pH of the mouth should be above 5.5
3. Cakes and sweets should be avoided to prevent tooth decay
4. The best way to prevent damage of teeth is to clean mouth after eating and always use basic toothpaste for neutralizing excess acid in our mouth and to clean our teeth