Question

write does tooth decay occur by change in PH. give example ( in short way )​

Answer 1

Answer:

Tooth decay starts when the pH of the acid formed in the mouth falls below 5.5 because the acid becomes strong enough to attack the enamel of the teeth and corrode it. ... Calcium carbonate is added to acidic lake water to neutralise the acid and this prevents the fish from being killed.

Answer 2

It is due to the bacterial activity on food particals remaining in the mouth and an acid is formed.The PH of the mouth falls below 5.5 and the tooth emamel dissolves resulting in cavities.