Question

(a). tooth enamel is one of the hardest substance in our body.explain the changes in ph of the mouth which indicate tooth decay. how does tooth paste help in preventing it?

Answer 1

.(a) Tooth decay starts when the pH of the mouth is lower than 5.5. Tooth

enamel, made up of calcium phosphate is the hardest substance in the

body. It does not dissolve in water, but is corroded when the pH in the

mouth is below 5.5. Bacteria present in the mouth produce acids by

degradation of sugar and food particles remaining in the mouth after

eating. Using toothpastes, which are generally basic, for cleaning the teeth

can neutralise the excess acid and prevent tooth decay.

Answer 2

Answer:

Bacteria present in the mouth produce acids by degradation of

sugar and food particles remaining in the mouth after eating. Using toothpastes, which

are generally basic, for cleaning the teeth can neutralize the excess acid and prevent

tooth decay.

pls mrk as brainliest